As of August 14, 2026, your apiary continues in good overall health — Hive #2 and Hive #3 are performing beautifully with textbook brood temperatures and perfectly stable acoustics, Iris is holding her own multi-week baseline, and Hive #1's 14-day cooling drift has now deepened to −5.6°F (−3.1°C) with acoustics remaining completely intact, pointing to a brood-break or reduced brood-rearing period rather than any population loss.
Across all four hives the STL-deseasonalized partial correlation between in-hive temperature and gas resistance (controlling for outdoor weather) is positive in Iris, Hive #2, and Hive #3 — warmer brood zones generate higher metabolic VOC loads — but strongly negative in Hive #1 (r=−0.84), a hive-specific inversion that is consistent with a colony running at reduced brood-heating intensity and therefore producing fewer brood pheromones and less evaporative honey chemistry at this time.
All four hives maintain clear 15/15-day fanning and activity vibration rhythms against an outdoor swing of 65.5–89.6°F (18.6–32.0°C) at 19–40% RH; Hive #2 and Hive #3 hold the tightest brood arcs (~2.9°F/1.6°C and ~1.7°F/0.9°C respectively), while Iris (~4.4°F/2.4°C) and Hive #1 (~6.9°F/3.8°C) show wider swings consistent with their respective colony thermal states riding August heat.
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Iris healthy Score: 76/100📋 Overall Health
Your Iris hive is holding steady — the 24h average of 89.3°F (31.8°C) is just −1.6°F (−0.9°C) below her all-time average of 90.9°F (32.7°C) and the 14-day cooling drift of −2.2°F (−1.2°C) continues at a gentle pace, while all 10 sound bands match their all-time baseline within ±0.8 dB confirming a fully intact and active population; humidity averaged 43.6%, consistent with her own historical range under August aridity; vibration at 17.5 mG avg with smooth kurtosis 2.6 and 15/15-day fanning rhythm is right at her all-time average of 17.4 mG. Gas resistance at ~444 kΩ sits essentially at her all-time average of ~438 kΩ with a flat heater-scan shape unchanged from prior readings — watch for the gradual multi-week temperature arc to continue its slow warming trend toward the ideal 93–97°F (34–36°C) brood band.
🌅 Diurnal Cycle PatternsIris shows a 4.4°F (2.4°C) daily arc (87.6–92.0°F / 30.9–33.3°C) with a clear rhythm; the deseasonalized analytics show the in-hive temp/outdoor temp raw correlation (r=+0.57) fully dissolves to r=+0.07 after removing the shared diurnal cycle, with outdoor leading in-hive by ~50 min — classic thermal-mass buffering, not a regulation failure. A modest acoustic rise in the 150–260 Hz bands in the second half of the day (+1.6–1.9 dB) aligns with the colony's normal foraging/fanning activity window; the per-band rhythm analysis notes a shift of the dominant sound rhythm from 200–260 Hz to 150–200 Hz and vibration dominant rhythm from 5–20 Hz to 50–80 Hz across the window — consistent with normal seasonal fanning modulation rather than any structural acoustic change. Gas heater-scan shape is stable across all 10 plate temperatures with a modest +19% swing at the 100°C step, reflecting routine daily metabolic cycling.
🔬 Correlations & Discoveriestemperature_in vs humidity_in vs gas_resistance (14d) | r = +0.91The exceptionally tight deseasonalized r=+0.91 between in-hive temperature and humidity in Iris — the strongest in the apiary — reflects active psychrometric coupling: as brood-zone temperature rises the same absolute water content registers as lower RH, and as the colony's metabolic rate increases it simultaneously raises VOC output (gas resistance r=+0.58 with temp), creating a three-channel co-movement that is a fingerprint of healthy brood-nest physiology rather than any stress signal.📚 Reference: Eouzan et al. 2019 (PLOS ONE / PMC6368279), Human, Nicolson & Dietemann 2006, Ellis et al. 2008, J. Insect Physiol.⚠️ Issue: 14-day gradual cooling drift of −2.2°F (−1.2°C) continues (from 91.5°F/33.0°C to 89.3°F/31.8°C); acoustics fully stable confirming intact population — consistent with a brood-break or reduced brood-rearing period.▹ Action: On your next routine visit, glance at the brood frames in Iris to confirm fresh eggs and a solid laying pattern — the continued acoustic brightness confirms a full 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: 88/100📋 Overall Health
Your Hive #2 remains the apiary's thermal anchor — brood temperature averaged 95.0°F (35.0°C) with a compressed 2.9°F (1.6°C) daily arc (94.1–97.0°F / 34.5–36.1°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) zone for another consecutive report; the 24h sound spectrum is elevated across all bands by +0.3–+1.9 dB above the all-time baseline — a continuation of the gradual acoustic build noted over the past two weeks, reflecting a growing and active population. Humidity averaged 46.9%, within its historical range; vibration at 14.5 mG avg with kurtosis 3.3 and 15/15-day fanning rhythm is steady at the all-time average of 14.6 mG; gas resistance at ~56 kΩ remains well below the all-time average of ~83 kΩ, but temperature and acoustics are both fully normal — this sustained low-resistance pattern (since ~August 2) is consistent with ongoing active honey ripening and high-VOC colony chemistry.
🌅 Diurnal Cycle PatternsHive #2 shows its tightest brood arc of the apiary at just 2.9°F (1.6°C) — a textbook brood-nest stenothermy signature; the deseasonalized in-hive humidity vs outdoor temp raw correlation (r=+0.49) fully dissolves to r=−0.02 after diurnal removal, confirming the in-hive microclimate is effectively decoupled from outdoor swings. Sound activity trends down in the second half of the day (−1.1 to −2.2 dB across six bands), consistent with the normal foraging-window taper; the per-band rhythm analysis notes the dominant sound rhythm shifting from 150–200 Hz to 100–150 Hz and the 1500–3600 Hz band rhythm strengthening (3.0→6.0 dB daily swing), reflecting increasing high-frequency colony activity in the latter part of the monitoring window — consistent with a maturing, ripening-focused colony. Gas heater-scan low-temperature steps (100–200°C) have dropped −21% to −29% relative to recent readings, while high-temperature steps remain stable — a shape shift toward lower-volatility chemistry consistent with honey curing progressing.
🔬 Correlations & Discoveriestemperature_in vs gas_resistance (14d) | r = +0.6The positive deseasonalized r=+0.60 between in-hive temperature and gas resistance in Hive #2 — where warmer periods correlate with rising (not falling) resistance — is the inverse of a disease-stress pattern and reflects healthy metabolic coupling: peak brood-heating activity is accompanied by increased fanning ventilation which dilutes accumulated VOCs, temporarily raising resistance; the colony-state PCA index rising over the window further supports a colony gaining thermal and chemical momentum heading into late August.📚 Reference: Stalidzans et al. 2017, Seeley 1974, J. Insect Physiol., Bosch Sensortec BME688 datasheet▹ Action: On your next routine visit, check the fill level and capping progress on Hive #2's supers — the gradual settling of the low-temperature heater-scan steps suggests the heavy honey-processing VOC load may be easing as honey approaches full curation, and recording the capped frame count will give you a useful season benchmark. -
Hive #1 warning Score: 65/100📋 Overall Health
Your Hive #1's 14-day cooling drift has now deepened to −5.6°F (−3.1°C) over 14 days (from 91.0°F/32.8°C to 85.4°F/29.7°C), and the 24h average of 85.4°F (29.7°C) sits −3.2°F (−1.8°C) below its all-time average of 88.6°F (31.4°C); crucially, all 10 sound bands remain within ±0.2 dB of their all-time baseline (24h avg −16.4 dBFS vs. all-time −16.4 dBFS — essentially a perfect match), confirming the adult bee population is fully present and active. The most likely explanation is a brood-break or reduced brood-rearing period — brood heating has relaxed while the workers remain intact — and the strong partial correlation of gas resistance rising as temperature falls (r=−0.84, controlling for outdoor weather) is consistent with lower brood-pheromone and honey-processing VOC output accompanying a quieter brood nest; humidity averaged 39.2%, right at its all-time average of 39.2%, and vibration at 16.4 mG avg with kurtosis 2.8 and 15/15-day fanning rhythm exactly matches the all-time average of 16.4 mG. On your next routine visit, a quick look at eggs and brood pattern will confirm whether this is a natural August brood contraction or a brief laying pause.
🌅 Diurnal Cycle PatternsHive #1 shows a 6.9°F (3.8°C) daily arc (81.9–88.5°F / 27.7–31.4°C), wider than Hive #2 and Hive #3 and consistent with reduced brood mass providing less thermal buffering; the deseasonalized in-hive temp vs outdoor temp raw correlation (r=+0.42) collapses to r=+0.04 after diurnal removal — the two move together only through the shared daily cycle, with outdoor leading in-hive by ~280 min, confirming healthy thermal-mass damping. Sound per-band analysis shows no strong per-band daily rhythm (max 1.0 dB in 600–800 Hz), which is characteristic of a quieter-brood colony maintaining steady background hum without the foraging-peak acoustic surges seen in Hive #2; gas heater-scan shows strong daily cycling across all 10 plate temperatures (max +48% swing at 150°C, dominant rhythm shifting from 100°C to 200°C across the window), reflecting the colony's intact metabolic rhythm driven by ventilation and temperature cycling rather than heavy honey-processing activity.
🔬 Correlations & Discoveriesgas_resistance vs temperature_in (14d) | r = -0.84The hive-specific partial correlation of r=−0.84 between gas resistance and in-hive temperature (controlling for outdoor weather) in Hive #1 — uniquely negative compared to the positive coupling seen in the other three hives — indicates that as internal temperature has cooled over the 14-day window, VOC load has also declined; this is consistent with reduced brood-pheromone emission (E-β-ocimene output scales with larval mass) and less honey-ripening chemistry, both expected consequences of a brood-break period with an intact adult population, and is the inverse of a disease-stress pattern.📚 Reference: Maisonnasse et al. 2010, PLoS ONE 5(10):e13531, Seeley 1985, Honeybee Ecology, Southwick 1983, Comp. Biochem. Physiol.⚠️ Issue: 14-day cooling drift of −5.6°F (−3.1°C) from 91.0°F (32.8°C) to 85.4°F (29.7°C), with a widening 6.9°F (3.8°C) daily arc — consistent with reduced brood mass; acoustics perfectly stable confirming the adult population is fully present and active.▹ Action: On your next routine visit this week, check the brood frames in Hive #1 — the perfectly stable acoustics confirm a fully present worker population, and a quick look at eggs and laying pattern will clarify whether the gentle temperature cooling reflects a natural August brood contraction or a brief laying pause; no urgency, but worth folding into an already-planned inspection. -
Hive #3 healthy Score: 96/100📋 Overall Health
Your Hive #3 continues its outstanding run — brood temperature averaged 93.1°F (33.9°C) with a textbook compressed 1.7°F (0.9°C) daily arc (92.4–94.1°F / 33.5–34.5°C), just −0.4°F (−0.2°C) below its all-time average of 93.5°F (34.2°C) and firmly in the ideal 93–97°F (34–36°C) zone; all 10 sound bands match their all-time baseline within ±0.1 dB (24h avg −16.3 dBFS vs. all-time −16.3 dBFS — a near-perfect match), and humidity averaged 48.4%, the healthiest in-hive RH in the apiary and right at its own all-time average of 49.2%. Vibration at 20.6 mG avg with kurtosis 2.6 and 14/15-day fanning rhythm matches its all-time average of 20.6 mG exactly; gas resistance at ~91 kΩ is essentially at its historical average of ~97 kΩ — everything here continues to run beautifully, with no action needed.
🌅 Diurnal Cycle PatternsHive #3 shows the tightest brood arc in the apiary at 1.7°F (0.9°C) — a hallmark of robust brood-nest stenothermy; the per-band sound rhythm analysis shows no strong per-band daily rhythm (max 0.7 dB), consistent with a stable, well-regulated colony whose acoustic output is dominated by broadband wingbeat energy rather than cyclical fanning surges. Vibration shows a clear 5–20 Hz daily rhythm (3.0 dB) across all 6 bands, reflecting the colony's healthy circadian foraging and ventilation schedule with typical baseline ~19.5 mG rising to ~33.0 mG daily peaks. Gas heater-scan shows daily cycling only in the 100°C step (+14% swing) with the remaining 9 steps essentially flat, suggesting the colony's VOC environment is very stable — consistent with well-cured honey stores and a settled brood-nest chemistry.
🔬 Correlations & Discoveriestemperature_in vs humidity_in vs gas_resistance (14d) | r = +0.86Hive #3's three-way deseasonalized coupling — in-hive temp r=+0.86 with humidity, r=+0.75 with gas resistance, and humidity r=+0.68 with gas resistance — is the strongest and most coherent multi-channel correlation in the apiary, reflecting a colony where brood-zone microclimate regulation, moisture homeostasis, and metabolic VOC output are tightly co-regulated; the partial correlation of gas resistance with in-hive temperature controlling for outdoor weather (r=+0.51) confirms this is genuine colony physiology, not an ambient artifact, and the falling PCA colony-state index over the window suggests this exceptionally tight regulation is gently consolidating as the colony settles into late-summer mode.📚 Reference: Eouzan et al. 2019 (PLOS ONE / PMC6368279), Human, Nicolson & Dietemann 2006, Kleinhenz, Bujok, Fuchs & Tautz 2003, J. Exp. Biol.▹ Action: On your next routine visit, note the fill level and capping progress on Hive #3's supers — the continued acoustic perfection and stable gas heater-scan fingerprint both suggest this colony is operating at peak late-summer efficiency, well worth recording in your season notes.