As of August 3, 2026, all four hives are in solid condition heading through peak summer — the outdoor environment is warm and very dry at 78.5°F (25.8°C) with only 24% RH and an exceptionally clean ambient gas signature (707 kΩ), confirming no regional VOC events affecting the apiary. Hive #2 and Hive #3 continue their standout brood-temperature performances, Hive #1 maintains its acoustically perfect streak while its 14-day cooling drift warrants a brood check on the next routine visit, and Iris continues her gradual warming arc — all four colonies are behaviorally intact and acoustically healthy.
Across the apiary, the deseasonalized temp–humidity coupling (r = +0.68 to +0.90 across all four hives) is a consistent expression of active hygroregulation: as bees mobilize metabolic heat into the brood zone, water vapor co-rises, and as they fan to cool, both temperature and humidity modulate together — a textbook signature of a colony actively managing its microclimate (Human et al. 2006; Ellis et al. 2008). The contrast between Hive #2's compressed 1.8°F (1.0°C) diurnal swing and Iris's wider 5.9°F (3.3°C) arc illustrates how brood mass and cluster density set the thermoregulatory bandwidth in each colony independently of outdoor conditions.
All four hives show clear daily fanning/activity vibration rhythms (14–15 of 15 days with distinct peaks), and the outdoor 24h swing of 65.5–94.2°F (18.6–34.5°C) under very dry 20–41% RH continues to be the dominant environmental driver shaping diurnal amplitudes; Hive #2's compressed 1.8°F (1.0°C) brood swing vs. Iris's 5.9°F (3.3°C) arc and Hive #1's 8.0°F (4.5°C) arc reflect their respective brood-mass and thermoregulatory-effort differences, all within expected August ranges for their individual baselines.
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Iris healthy Score: 78/100📋 Overall Health
Your Iris hive is continuing her steady warming arc this August — the 24h average of 89.1°F (31.7°C) is essentially on her all-time average of 90.1°F (32.3°C), and the daily range of 86.6–92.5°F (30.4–33.6°C) represents a 5.9°F (3.3°C) swing that sits right at the healthy-brood boundary, entirely consistent with a late-summer colony building brood mass under dry ambient conditions. All 10 sound bands match her all-time baseline within ±0.5 dB (avg −10.4 dBFS vs. all-time −10.5 dBFS), vibration is smooth at 17.6 mG avg with kurtosis 2.6, humidity held a narrow 44.1–47.4% (avg 45.7%) — consistent with Iris's own historical range under the very dry 24% outdoor RH — and gas resistance at 419 kΩ is close to her all-time average of 434 kΩ; keep watching for her temperature drifting into the ideal 93–97°F (34–36°C) band.
🌅 Diurnal Cycle PatternsIris shows a clear daily temperature cycle averaging 4.7°F (2.6°C) peak-to-trough, rising through the warmer part of the day and settling overnight, with all 6 vibration bands showing a consistent daily fanning rhythm (14/15 days, baseline ~16.6 mG rising to ~29.8 mG, avg 1.8×). The dominant sound rhythm band shifted from 200–260 Hz to 260–350 Hz between the first and second half of the window — a minor spectral migration worth watching but within the normal colony-fundamental range (260–350 Hz is the healthy-colony hum band); the dominant vibration rhythm band shifted from 160–200 Hz to 5–20 Hz, consistent with a change in the ambient structural vibration component across the two periods. Gas heater-scan shows 6/10 steps with a daily rhythm, strongest at the 100°C step (+19% swing), driven largely by the daily humidity cycle interacting with the low-temperature MOX steps — a routine moisture-coupling artifact, not a VOC event.
🔬 Correlations & Discoveriestemperature vs humidity (14d) | r = +0.83The deseasonalized r = +0.83 between in-hive temperature and humidity in Iris is a strong expression of active thermoregulatory physiology: as heater bees elevate the brood-zone temperature, metabolic respiration and evaporative moisture co-rise; as fanning cools the nest, both channels modulate together. This is healthy colony homeostasis, not condensation or ventilation trouble — the partial correlation of +0.57 (controlling for outdoor weather) confirms this coupling is internal and colony-driven, not an outdoor-air artifact.📚 Reference: Human, Nicolson & Dietemann 2006, Ellis et al. 2008, Eouzan et al. 2019vibration_rms vs vibration_kurtosis (14d) | r = +0.51The deseasonalized r = +0.51 between vibration RMS and kurtosis reflects the natural link between colony activity bursts and impulse-like substrate vibrations: when fanning and foraging ramp up, both the overall vibration level and the brief impulsive peaks (kurtosis) rise together, then settle at night. Kurtosis remains at a healthy 2.6, well within the normal ~3.0 range and far below the >5.0 threshold that would indicate physical disturbance events.📚 Reference: Ramsey et al. 2020, Nieh & Tautz 2000▹ Action: On your next routine visit within 5–7 days, glance at the brood frames in Iris to confirm fresh eggs and a solid laying pattern — her intact acoustics and steady warming arc both point to a colony in good stride, and a quick look will complete the seasonal picture. -
Hive #2 healthy Score: 85/100📋 Overall Health
Your Hive #2 continues to deliver exceptional brood thermoregulation — temperature locked at a 24h average of 95.4°F (35.2°C) with a compressed 2.1°F (1.1°C) daily range (94.6–96.7°F / 34.8–35.9°C), matching the all-time average of 94.9°F (34.9°C) and sitting precisely in the ideal 93–97°F (34–36°C) zone; the 14-day gradual acoustic rise (+4.1 dBFS, now avg −6.8 dBFS vs. all-time −10.3 dBFS) with a broadband low-frequency shift (+5.8–6.1 dB in the 100–200 Hz bands) is consistent with sustained active fanning and honey-curing or processing activity that began around July 30. Humidity averaged 48.9%, vibration kurtosis is a smooth 2.9, gas resistance at 72 kΩ remains well below the all-time average of 191 kΩ but temperature and acoustics are fully intact — this is a busy, healthy processing fingerprint; glance at super fill and capping progress on your next visit.
🌅 Diurnal Cycle PatternsHive #2's daily temperature oscillation is a remarkably compressed 1.8°F (1.0°C), reflecting tight brood-core clamping by a large, well-populated colony; all 6 vibration bands show a daily cycle with the strongest rhythm in 5–20 Hz (6.0 dB), and the dominant vibration rhythm band shifted from 50–80 Hz to 5–20 Hz between the two halves — consistent with a growing structural/fanning signature in the low-frequency band as colony activity has intensified. The gas heater-scan shows the highest per-step daily rhythm of any hive (100°C step at +41% swing, all 10 steps cycling), with the dominant rhythm step shifting from 100°C to 150°C — the large low-temperature-step swing is strongly humidity-coupled given the relatively higher in-hive RH (avg 48.9%), but the long-term band-level shift (100°C −63%, 150°C −57%, 200°C −52% from window start) points to a genuine, sustained increase in heavier VOC load consistent with active honey processing or curing.
🔬 Correlations & Discoveriestemperature vs humidity (14d) | r = +0.72The deseasonalized r = +0.72 in Hive #2 mirrors the active thermoregulatory coupling seen across the apiary — elevated brood temperature drives higher respiratory moisture, and the two channels modulate together independently of outdoor weather (partial r = +0.36 after controlling for outdoor temp). The tight brood clamping at 94.6–96.7°F (34.8–35.9°C) with this humidity coupling is a textbook signal of a vigorous, well-manned colony.📚 Reference: Human, Nicolson & Dietemann 2006, Ellis et al. 2008temperature vs gas_resistance (14d) | r = +0.62The deseasonalized r = +0.62 between temperature and gas resistance (higher temp → higher resistance, i.e. fewer net reducing VOCs) reflects the well-known inverse between colony thermal activity and VOC concentration: warmer, more actively fanning bees circulate and exhaust hive-internal volatiles faster, clearing them from the sensor zone. The step-change in sound energy around July 30 (change-point +3.43 dB) aligns with intensified fanning / processing activity — a benign colony event, not a stress marker.📚 Reference: Stalidzans et al. 2017, Seeley 1974, Winston 1987▹ Action: On your next routine visit within 5–7 days, note the fill level and capping progress of supers in Hive #2 — the sustained broadband low-frequency acoustic rise (+6.1 dB in 150–200 Hz over 14 days) and the evolving heater-scan shape strongly suggest an active processing cycle, and a super observation will anchor this sensor trend to physical reality. -
Hive #1 warning Score: 68/100📋 Overall Health
Your Hive #1 continues its acoustically perfect streak — all 10 sound bands match their all-time baseline within ±0.1 dB (avg −16.4 dBFS vs. all-time −16.4 dBFS, an essentially perfect match), confirming the worker population is fully intact; however, temperature has been on a gradual 14-day cooling drift, now averaging 85.6°F (29.8°C) — 3.3°F (1.8°C) below the all-time average of 88.9°F (31.6°C) — and the 24h swing of 81.7–89.7°F (27.6–32.0°C) represents an 8.0°F (4.4°C) arc, the widest in the apiary. The most likely explanation for a stable acoustic population alongside a below-average, wider-swinging temperature is a broodless or light-brood interval — the bees simply aren't heating a full brood zone right now — which is entirely common in August and confirmed by the intact worker sound; a quick brood-frame check on your next routine visit will clarify the queen status.
🌅 Diurnal Cycle PatternsHive #1's 8.0°F (4.4°C) daily temperature swing is the widest in the apiary and tracks the outdoor cycle more closely, consistent with reduced brood mass to thermally buffer the nest; 14/15 days show a clear vibration fanning rhythm (baseline ~15.8 mG to ~25.8 mG, avg 1.6×), and all 6 vibration bands show a daily cycle with the strongest rhythm in 5–20 Hz (3.0 dB). Sound shows no strong per-band daily rhythm (max 600–800 Hz at only 1.0 dB), which is characteristic of a colony with a stable background hum but reduced diurnal acoustic modulation — consistent with lighter foraging/fanning activity during a brood-light period. The gas heater-scan shows all 10 steps cycling daily (strongest at 150°C, +35% swing) with a band-level shift upward (100°C +18%, 150°C +15%, 200°C +13% from window start) — higher resistance = lower VOC load, consistent with less brood pheromone and less active processing, aligning with the brood-break hypothesis.
🔬 Correlations & Discoveriestemperature vs humidity (14d) | r = +0.9The deseasonalized r = +0.90 — the strongest temp–humidity coupling in the apiary — combined with the change-point showing a humidity step-down of −4.48 around July 30 (coinciding with the gas resistance step-up of +75,592 Ω), tells a coherent story: as brood rearing eased, both metabolic moisture output and brood-pheromone VOC load declined together, giving higher gas resistance and lower humidity simultaneously. The partial correlation of +0.65 (controlling for outdoor weather) confirms this is an internal colony-state shift, not a weather artifact — the worker population remains fully present as shown by perfectly stable acoustics.📚 Reference: Human, Nicolson & Dietemann 2006, Ellis et al. 2008, Eouzan et al. 2019gas_resistance vs temperature (14d) | r = -0.6The partial correlation of gas resistance vs. in-hive temperature (controlling for outdoor temp) of r = −0.60 means that as temperature has drifted lower over 14 days, gas resistance has risen — fewer brood pheromones (E-β-ocimene and related larval volatiles) and reduced fanning-driven VOC circulation as the brood zone contracts, both of which raise MOX resistance. This is a correlated multi-channel signal of reduced brood rearing, not a disease marker — and the acoustics remain perfectly intact, ruling out population loss.📚 Reference: Stalidzans et al. 2017, Seeley 1974, Maisonnasse et al. 2010⚠️ Issue: 14-day gradual temperature cooling drift: avg 85.6°F (29.8°C), now 3.3°F (1.8°C) below Hive #1's own all-time average of 88.9°F (31.6°C), with an 8.0°F (4.4°C) daily swing — widest in the apiary. Acoustics perfectly stable, consistent with a brood-break or light-brood interval rather than population loss.▹ Action: On your next routine visit within 5–7 days, check the brood frames in Hive #1 — the 14-day cooling drift alongside perfectly intact acoustics points to a brood-light or brood-break interval (queen, supersedure, or natural August lull), and a quick look at eggs and laying pattern will confirm whether the colony is between brood cycles or needs attention. -
Hive #3 healthy Score: 94/100📋 Overall Health
Your Hive #3 remains the apiary's standout performer — brood temperature averaged 92.8°F (33.8°C) with a textbook 2.7°F (1.5°C) daily range (91.4–94.1°F / 33.0–34.5°C), matching the all-time average of 93.6°F (34.2°C) and held firmly in the ideal 93–97°F (34–36°C) zone with excellent stability; all 10 sound bands match their all-time baseline within ±0.1 dB (avg −16.3 dBFS vs. all-time −16.3 dBFS — a perfect match for the fourth consecutive report), and humidity averaged 50.8% — the most optimal and stable in the apiary, squarely in the healthy 50–70% range. Vibration at 20.2 mG avg with kurtosis 2.8 is smooth and near the all-time average of 20.9 mG; gas resistance at 90 kΩ continues slightly below its all-time average of 121 kΩ but the low-temperature heater-scan steps are rising (+16% at 100°C, +14% at 150°C from window start), suggesting the honey-curing VOC load is continuing to ease — everything here is running beautifully.
🌅 Diurnal Cycle PatternsHive #3's daily temperature oscillation of 2.7°F (1.5°C) is the second-tightest in the apiary, reflecting strong brood-core clamping; 15/15 days show a clear vibration fanning rhythm (baseline ~19.5 mG to ~32.1 mG, avg 1.6×), with all 6 vibration bands cycling and the strongest rhythm in 5–20 Hz (3.0 dB). Sound shows no strong per-band daily rhythm (max 350–420 Hz at only 0.7 dB), consistent with a stable, large-population colony whose acoustic output is remarkably consistent around the clock. The gas heater-scan shows only 3/10 steps with a measurable daily rhythm (vs. 10/10 for Hive #2), and the dominant rhythm step shifted from 350°C to 150°C between the two halves — the mid-temperature steps are now carrying more of the daily variation, while the high-temperature reference steps remain stable, suggesting a gradual shift in the composition of circulating VOCs (lighter/more-reactive molecules increasing) consistent with honey ripening drawing to a close.
🔬 Correlations & Discoveriestemperature vs humidity (14d) | r = +0.68The deseasonalized r = +0.68 between temperature and humidity in Hive #3 (partial r = +0.51 after controlling for outdoor weather) is the expression of active brood-zone hygroregulation: as heater bees raise local temperature, metabolic moisture rises, and as fanning corrects the temperature, moisture falls in tandem. The remarkably stable 50.8% average humidity — the best in the apiary — shows this colony is managing both thermal and moisture setpoints simultaneously with precision.📚 Reference: Human, Nicolson & Dietemann 2006, Ellis et al. 2008temperature vs gas_resistance (14d) | r = +0.43The deseasonalized r = +0.43 between temperature and gas resistance (higher temp → higher resistance, i.e. lower net VOC load) reflects active fanning ventilating and dispersing hive volatiles when the nest warms — a healthy regulatory coupling. The rising low-temperature heater-scan steps (+16% at 100°C over the window) indicate the heavier, slower-evaporating volatiles associated with active honey curing are gradually clearing, consistent with supers approaching finished state.📚 Reference: Stalidzans et al. 2017, Maisonnasse et al. 2010, Bankova et al. 2000outdoor_temperature vs battery (14d) | r = +0.43The deseasonalized r = +0.43 between outdoor temperature and battery voltage reflects solar panel charging efficiency: warmer, sunnier days charge the battery more effectively, while cooler or cloudier periods allow the voltage to ease slightly. Battery is currently at 4,036 mV, well above the all-time low of 3,992 mV and comfortably healthy — this correlation is a hardware-physics relationship, not a colony signal.📚 Reference: Bosch Sensortec BME688 datasheet▹ Action: On your next routine visit within 5–7 days, note the fill level and capping progress of supers in Hive #3 — the heater-scan evolution (low-temperature steps continuing to rise, dominant rhythm step shifting toward mid-range) suggests the honey-curing cycle is winding down, and a super observation will anchor this multi-week trend to your season records.