As of August 17, 2026, your apiary is in good late-summer shape — Hive #2 remains the textbook thermal anchor at 95.2°F (35.1°C) and Hive #3 holds its characteristically steady 93.3°F (34.1°C), while Iris and Hive #1 continue their multi-week gradual cooling trend with fully intact, acoustically confirmed worker populations consistent with a natural August brood contraction or laying pause worth a brood-frame glance on your next routine visit.
The strikingly consistent gas resistance × temperature coupling found independently in Hive #2 (r=+0.80), Hive #3 (r=+0.78), and Iris (partial r=−0.62) across all three hives reflects a well-established MOX-sensor phenomenon: as brood-nest temperature rises, fanning intensifies and circulates more hive volatiles (honey ripening esters, brood pheromones, propolis terpenes), driving resistance lower — a healthy, hardworking apiary signature, not a concern (Seeley 1974; Maisonnasse et al. 2010).
All four hives show crisp daily fanning and activity rhythms against an outdoor swing of 64.1–92.5°F (17.8–33.6°C) at a very dry 13–35% RH, with the barometric tendency rising +1.73 hPa/3h — a clearing signal supporting good foraging conditions; Hive #2 maintains the tightest brood arc (~2.1°F/1.2°C), Hive #3 next (~2.3°F/1.3°C), while Iris (~5.7°F/3.2°C) and Hive #1 (~8.2°F/4.6°C) show wider swings consistent with their lower average temperatures and reduced brood mass during an August brood-contraction phase.
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Iris warning Score: 75/100📋 Overall Health
Your Iris hive's 24h average of 89.1°F (31.7°C) remains −1.4°F (−0.8°C) below her all-time average of 90.5°F (32.5°C), continuing the gradual multi-week cooling trend (weekly arc 90.7→90.7→91.2→88.9°F), but all 10 sound bands remain within ±1.3 dB of her all-time baseline (24h avg −10.8 dBFS vs. all-time −10.1 dBFS) — the acoustics confirm the adult population is fully present and active, making a brood-break or natural August brood contraction the most parsimonious explanation. Humidity averaged 40.5%, near her all-time average of 43.6% and appropriate for this dry-climate August; vibration at 17.4 mG avg with kurtosis 3.0 and a perfect 15/15-day fanning rhythm sits exactly at her all-time average — no concerns. On your next routine visit, a quick look at Iris's brood frames for fresh eggs and a solid laying pattern will confirm whether this gentle cooling reflects a temporary laying pause or a natural brood contraction.
🌅 Diurnal Cycle PatternsIris shows a 24h temperature arc of 86.2–91.9°F (30.1–33.3°C), a swing of 5.7°F (3.2°C) — slightly wider than the healthy-brood threshold but fully consistent with reduced brood mass during an August contraction, not a regulation failure; the outdoor day ranged 64.1–92.5°F (17.8–33.6°C), and Iris holds a warm offset above outdoor lows confirming active thermoregulation. Humidity held an exceptionally tight 39.0–41.9% band, a flat homeostatic line reflecting the very dry ambient; vibration shows all 6 bands cycling daily with the dominant rhythm in 80–120 Hz (fanning/ventilation), and a noted shift of the dominant rhythm band from 5–20 Hz to 20–50 Hz in the second half of the window warrants passive watching but is not unusual during August activity lulls; the 1500–3600 Hz sound band has weakened slightly (5.0→3.0 dB) over the window, consistent with a modest reduction in forager wingbeat activity during a brood-contraction phase. The gas heater-scan shows its strongest daily rhythm at the 100°C step (+19% swing), with the low-temperature steps (100–200°C) most sensitive to the moisture-linked diurnal cycle — the partial r=−0.62 between gas resistance and in-hive temperature (controlling for outdoor weather) reflects the expected VOC concentration rising with fanning activity as temperature peaks.
🔬 Correlations & Discoveriestemperature_in vs gas_resistance (14d) | r = -0.62The partial correlation (controlling for outdoor temperature) between Iris's in-hive temperature and gas resistance captures a genuine colony coupling: as the hive warms during peak foraging, intensified fanning circulates brood pheromones (E-β-ocimene), honey-ripening volatiles, and propolis terpenes — all reducing gas resistance on the MOX plate. This is a healthy metabolic signature, not a stress signal.📚 Reference: Maisonnasse et al. 2010, PLoS ONE, Seeley 1974, J. Insect Physiol., Bosch Sensortec BME688 datasheettemperature_in vs humidity_in (14d) | r = -0.48The deconfounded inverse relationship between Iris's in-hive temperature and humidity reflects basic psychrometrics: the same absolute water content reads as lower RH% at higher temperatures, so as the colony warms during foraging peaks, measured RH dips — active hygroregulation and thermodynamic physics, not a drying event.📚 Reference: Eouzan et al. 2019, PLoS ONE, Human, Nicolson & Dietemann 2006, Naturwissenschaften⚠️ Issue: Multi-week gradual cooling drift continues: 24h avg 89.1°F (31.7°C) is −1.4°F (−0.8°C) below Iris's all-time avg of 90.5°F (32.5°C); weekly arc 90.7→90.7→91.2→88.9°F — acoustics fully stable (all bands within ±1.3 dB of baseline) confirming intact population, consistent with a brood-break or natural August brood contraction.▹ Action: On your next routine visit, check Iris's brood frames for fresh eggs and a solid laying pattern — the stable acoustics confirm a full, active population, and a quick look will clarify whether the gentle multi-week cooling reflects a natural August brood contraction or a brief laying pause. -
Hive #2 healthy Score: 90/100📋 Overall Health
Your Hive #2 remains the apiary's thermal anchor — brood temperature averaged 95.2°F (35.1°C), exactly on its all-time average of 95.1°F (35.1°C) and squarely in the ideal 93–97°F (34–36°C) band, with a tight 24h arc of only 94.3–96.4°F (34.6–35.8°C) — outstanding late-summer brood clamping. All 10 sound bands remain within ±1.1 dB of their all-time baseline, and humidity averaged 44.2% (all-time avg 46.9%), comfortably in range; vibration at 14.9 mG avg with kurtosis 3.1 and a perfect 15/15-day fanning rhythm confirms vigorous colony metabolism — everything looks excellent heading into late August. Gas resistance at ~54 kΩ (all-time avg ~71 kΩ) remains below its historical baseline, sustained since early August and consistent with ongoing honey-ripening VOC activity, with temperature and acoustics both fully normal.
🌅 Diurnal Cycle PatternsHive #2 shows the tightest brood arc in the apiary at 94.3–96.4°F (34.6–35.8°C), a swing of only 2.1°F (1.2°C) — textbook brood stenothermy with temperature held well within the 34–36°C band across the full day. The strongest per-band sound rhythm is in 100–150 Hz (5.9 dB daily cycle), with 7/10 sound bands cycling — normal forager activity rhythm; vibration shows all 6 bands cycling with the dominant rhythm in 80–120 Hz (5.4 dB), reflecting robust fanning/ventilation, though a shift of the dominant vibration rhythm band from 50–80 Hz to 5–20 Hz in the second half warrants passive watching. The gas heater-scan shows a notable pattern: the low-temperature steps (100°C −27%, 150°C −22%, 200°C −20%) have declined relative to the high-temperature steps, suggesting a gradual shift in the kinds of volatiles present — consistent with honey stores approaching full curation as the most reactive light volatiles (nectar-processing esters and alcohols) diminish. Humidity cycled 40.2–48.0% with a tight daily rhythm, remaining well within range throughout.
🔬 Correlations & Discoveriestemperature_in vs gas_resistance (14d) | r = +0.8The strong deconfounded coupling between Hive #2's brood temperature and gas resistance reflects the colony's active honey-ripening metabolism: as brood temperature rises and fanning intensifies for nectar curing, circulating volatiles (honey esters, propolis terpenes, brood pheromones) lower MOX resistance — a healthy late-summer hardworking signature that tracks the colony's own metabolic rhythm.📚 Reference: Maisonnasse et al. 2010, PLoS ONE, Bankova et al. 2000, Apidologie, Bosch Sensortec BME688 datasheettemperature_in vs humidity_in (14d) | r = +0.76Unlike Iris's inverse temp–humidity relationship, Hive #2 shows a positive deconfounded correlation, suggesting that Hive #2's humidity rises with temperature — consistent with evaporative cooling via water-carrier bees on warm days, where increased metabolic/brood activity drives both temperature and moisture input simultaneously, a healthy active-colony signature.📚 Reference: Eouzan et al. 2019, PLoS ONE, Ellis et al. 2010, Naturwissenschaften▹ Action: On your next routine visit, note the fill level and capping progress on Hive #2's supers — the gradual easing of the low-temperature heater-scan steps suggests the honey-processing VOC load may be slowly declining as stores approach full curation, and recording the capped-frame count will give you a useful late-summer benchmark. -
Hive #1 warning Score: 74/100📋 Overall Health
Your Hive #1's gradual multi-week cooling trend continues — the 24h average of 86.0°F (30.0°C) sits −2.0°F (−1.1°C) below its all-time average of 88.0°F (31.1°C), with the weekly arc showing a steady downward progression (89.2→88.7→87.8→86.4°F); crucially, all 10 sound bands remain within ±0.1 dB of their all-time baseline (24h avg −16.4 dBFS — a near-perfect match), confirming the worker population is fully present and active, making a brood-break or reduced brood-rearing period the most parsimonious explanation. Humidity averaged 36.2% (all-time avg 38.4%), essentially on its historical norm and unsurprising given this apiary's very dry ambient; vibration at 16.2 mG avg with kurtosis 2.6 and a 14/15-day fanning rhythm confirms active colony metabolism. On your next routine visit, a brood-frame check will confirm whether this is a natural August contraction or a brief laying pause.
🌅 Diurnal Cycle PatternsHive #1 shows the widest brood arc in the apiary at 81.9–90.1°F (27.7–32.3°C), a swing of 8.2°F (4.6°C) — wider than the healthy-brood clamping threshold and consistent with reduced brood mass providing less thermal inertia during an August contraction; the colony's temperature tracks the outdoor phase more closely (240-minute buffering lag noted in multivariate analytics), which is expected physics when the heated brood area has shrunk. No strong per-band daily sound rhythm (max 600–800 Hz 1.0 dB), consistent with a quieter brood-contraction phase; vibration shows all 6 bands cycling with the dominant rhythm in 5–20 Hz (3.0 dB), and a shift of the dominant vibration rhythm from 50–80 Hz to 120–160 Hz in the second half is noted as a passive watch item. The gas heater-scan shows very strong daily rhythms at the 150°C step (+48% swing) across all 10 bands — the largest VOC daily cycle in the apiary, and the partial r=−0.83 between gas resistance and temperature (controlling for outdoor weather) is the strongest colony-specific coupling observed, reflecting this hive's particularly responsive MOX baseline to its own fanning/metabolic cycles.
🔬 Correlations & Discoveriesgas_resistance vs temperature_in (14d) | r = -0.83The strongest hive-specific gas–temperature partial correlation in the apiary: as Hive #1's temperature rises (driven by foraging and fanning cycles), volatile concentration increases and MOX resistance falls sharply — the inverse relationship controlled for outdoor weather is a genuine colony metabolic signature, most likely reflecting the concentration and dilution of propolis terpenes and brood pheromones as the smaller active cluster fans and rests through the day.📚 Reference: Seeley 1974, J. Insect Physiol., Maisonnasse et al. 2010, PLoS ONE, Bosch Sensortec BME688 datasheettemperature_in vs humidity_in (14d) | r = +0.34The modest positive partial correlation between Hive #1's temperature and humidity (controlling for outdoor temp) suggests that at this hive's lower brood temperatures, warmer periods coincide with slightly elevated moisture — consistent with evaporative water-carrier activity during warm foraging windows rather than the pure psychrometric inverse seen in hotter brood nests.📚 Reference: Eouzan et al. 2019, PLoS ONE, Human, Nicolson & Dietemann 2006, Naturwissenschaften⚠️ Issue: Gradual multi-week cooling drift persists: 24h avg 86.0°F (30.0°C), weekly arc 89.2→88.7→87.8→86.4°F — now −2.0°F (−1.1°C) below all-time avg of 88.0°F (31.1°C); acoustics perfectly stable (all bands within ±0.1 dB of baseline) confirming the adult population is fully present and active — consistent with a brood-break or natural August brood contraction.▹ Action: On your next routine visit, check Hive #1's brood frames for fresh eggs and a solid laying pattern — the perfectly stable acoustics confirm a fully present worker population, and a quick look will clarify whether the multi-week temperature cooling reflects a natural August brood contraction or a brief laying pause. -
Hive #3 healthy Score: 92/100📋 Overall Health
Your Hive #3 continues its outstanding run — brood temperature averaged 93.3°F (34.1°C) with a current reading of 93.1°F (34.0°C), squarely in the ideal 93–97°F (34–36°C) band and essentially on its all-time average of 93.4°F (34.1°C); the weekly trend remains remarkably flat (93.4→93.4→93.7→93.0°F) and all 10 sound bands are within ±0.1 dB of their all-time baseline — a textbook stable, active colony. Humidity averaged 47.2% (all-time avg 48.6%), the most consistently brood-optimal RH in the apiary; vibration at 21.2 mG avg with kurtosis 2.9 and a perfect 15/15-day fanning rhythm sits right at its all-time average of 20.7 mG — everything looks excellent heading into late August. Gas resistance at ~96 kΩ (all-time avg ~96 kΩ) is essentially on its historical baseline, a reassuring sign of stable hive chemistry.
🌅 Diurnal Cycle PatternsHive #3 shows a 24h temperature arc of 92.5–94.8°F (33.6–34.9°C), a swing of only 2.3°F (1.3°C) — tight brood clamping just below Hive #2, well within the healthy-brood threshold and consistent with steady, active brood rearing. No strong per-band daily sound rhythm (max 600–800 Hz 1.0 dB), similar to Hive #1, but overall sound energy and spectral shape are perfectly stable against the all-time baseline; vibration shows all 6 bands cycling with the dominant rhythm in 5–20 Hz (3.0 dB), and the gas heater-scan shows only the 100°C step with a notable daily rhythm (+14% swing) while 9/10 other steps show essentially no daily cycle — the flattest gas daily rhythm in the apiary, suggesting Hive #3's volatile environment is the most stable and least reactive to the day/night temperature cycle, consistent with well-cured stores and a steady metabolic baseline. Humidity held a very tight 45.9–48.0% band throughout the day, the most stable in the apiary.
🔬 Correlations & Discoveriestemperature_in vs gas_resistance (14d) | r = +0.78Hive #3's strong deconfounded temp–gas coupling (partial r=+0.56 controlling for outdoor weather) reflects healthy late-summer brood-nest chemistry: as the colony warms during foraging, fanning circulates brood pheromones (E-β-ocimene from active larvae), propolis volatiles, and honey-ripening esters — all reducing MOX resistance in step with temperature, a stable and repeating metabolic signature of a thriving colony.📚 Reference: Maisonnasse et al. 2010, PLoS ONE, Seeley 1974, J. Insect Physiol., Stalidzans et al. 2017humidity_in vs gas_resistance (14d) | r = +0.62The deconfounded positive coupling between Hive #3's in-hive humidity and gas resistance (rising together) is somewhat unusual and worth noting: rather than the expected inverse (more moisture lowering resistance via MOX surface blocking), this likely reflects that Hive #3's humidity and VOC load are both driven by the same brood-rearing metabolic state — higher brood activity drives both moisture production and volatile emissions simultaneously, a coherent physiological signature of an actively rearing colony.📚 Reference: Winston 1987, The Biology of the Honey Bee, Eouzan et al. 2019, PLoS ONE, Bosch Sensortec BME688 datasheet▹ Action: On your next routine visit, note the fill level and capping progress on Hive #3's supers — the continued acoustic stability and the very quiet, shape-stable gas heater-scan daily cycle both suggest this colony is operating at peak late-summer efficiency with stores well underway, and recording the capped-frame count will give you a useful season benchmark.