August is one of the warmer months of the year in Danbury, with average highs near 28°C and lows around 16.4°C (mean 22.2°C). It is about average for rainfall, averaging 108 mm of rainfall and 73% relative humidity across the period.
August is one of the warmer months of the year in Danbury. Across 45 years of records, the warmest August in Danbury was 2022 — when the month averaged 25.4°C — while the coldest was 1986 at 19.8°C. Typical August days reach 28°C with nights near 16.4°C. The long-term trend is warming, about 0.4°C per decade.
August is about average for rainfall in Danbury, averaging 108 mm of rainfall. The wettest August on record was 2011 with 372 mm, while the driest was 1981 at 32 mm.
Relative humidity in Danbury during August averages 73%. The most humid August was 2018 at 84%, and the least humid was 1995 at 59%.
August receives about 5.3 kWh/m²/day of solar energy in Danbury. The sunniest Augusts were 2015 and 2016 at 5.9 kWh/m²/day, and the cloudiest was 2021 at 4.6.
Average wind speed in Danbury during August is 0.2 m/s. The windiest Augusts were 2023, 2024 and 2025, among others at 0.2 m/s, while the calmest were 2018, 2019 and 2022, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.3°C | 21.9°C | 22.5°C | 22.5°C | 23.1°C | +1.8°C |
| Avg High | 27.4°C | 27.9°C | 28.2°C | 28.1°C | 28.7°C | +1.3°C |
| Avg Low | 15.3°C | 15.8°C | 16.9°C | 16.8°C | 17.4°C | +2.1°C |
| Avg Rain | 88 mm | 107 mm | 109 mm | 128 mm | 107 mm | +19 mm |
August temperatures in Danbury have risen by about 1.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 5.5°C (1982) to a record high of 39.1°C (2001).
Rainfall in August is about average for rainfall, averaging 108 mm, with a wettest year of 372 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.6°C per decade, narrowing the gap between day and night.
One of the best times to visit Danbury
August is one of the best times to visit Danbury. Expect days averaging 28°C and nights around 16.4°C (mean 22.2°C) — warmer than Danbury's yearly average — with higher rainfall (108 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 28.7°C | 22.2°C | 15.7°C | 35.3°C | 10.1°C | 47 mm | 64% | 0.2 m/s | 5.8 |
| 2024 | 27.8°C | 22.3°C | 16.8°C | 34.7°C | 10.4°C | 171 mm | 78% | 0.2 m/s | 4.9 |
| 2023 | 26.3°C | 21.3°C | 16.4°C | 29.1°C | 11.8°C | 135 mm | 81% | 0.2 m/s | 4.9 |
| 2022 🔥 | 31.6°C | 25.4°C | 19.2°C | 36.8°C | 14.2°C | 40 mm | 63% | 0.1 m/s | 5.6 |
| 2021 | 28.7°C | 23.7°C | 18.6°C | 34.9°C | 12.3°C | 143 mm | 78% | 0.2 m/s | 4.6 |
| 2020 | 29.4°C | 23.6°C | 17.8°C | 34.2°C | 11.8°C | 104 mm | 70% | 0.2 m/s | 5.4 |
| 2019 | 28.2°C | 22.6°C | 17.0°C | 32.0°C | 10.3°C | 94 mm | 75% | 0.1 m/s | 5.6 |
| 2018 | 28.0°C | 23.4°C | 18.9°C | 34.0°C | 13.3°C | 178 mm | 84% | 0.1 m/s | 5.1 |
| 2017 | 27.2°C | 21.5°C | 15.8°C | 31.9°C | 10.6°C | 85 mm | 73% | 0.2 m/s | 5.4 |
| 2016 | 30.2°C | 24.2°C | 18.2°C | 33.7°C | 11.5°C | 84 mm | 71% | 0.2 m/s | 5.9 |
| 2015 | 30.1°C | 23.6°C | 17.1°C | 34.1°C | 13.1°C | 68 mm | 66% | 0.2 m/s | 5.9 |
| 2014 | 27.6°C | 21.5°C | 15.4°C | 33.6°C | 11.5°C | 61 mm | 70% | 0.2 m/s | 5.4 |
| 2013 | 25.9°C | 20.6°C | 15.4°C | 30.1°C | 10.3°C | 124 mm | 78% | 0.2 m/s | 5.2 |
| 2012 | 28.7°C | 22.8°C | 16.9°C | 33.0°C | 11.1°C | 94 mm | 72% | 0.2 m/s | 5.5 |
| 2011 🌧️ | 26.4°C | 21.4°C | 16.4°C | 31.4°C | 10.6°C | 372 mm | 82% | 0.2 m/s | 5 |
| 2010 | 29.0°C | 23.0°C | 17.0°C | 34.5°C | 11.4°C | 123 mm | 70% | 0.2 m/s | 5 |
| 2009 | 26.9°C | 22.2°C | 17.5°C | 33.8°C | 11.7°C | 124 mm | 83% | 0.2 m/s | 5.2 |
| 2008 | 27.0°C | 21.0°C | 15.0°C | 30.0°C | 9.8°C | 88 mm | 73% | 0.2 m/s | 5.8 |
| 2007 | 28.4°C | 22.4°C | 16.5°C | 35.5°C | 11.1°C | 99 mm | 73% | 0.2 m/s | 5.2 |
| 2006 | 27.5°C | 22.1°C | 16.7°C | 34.3°C | 10.5°C | 139 mm | 74% | 0.2 m/s | 5.4 |
| 2005 | 31.0°C | 24.8°C | 18.7°C | 37.0°C | 13.5°C | 58 mm | 67% | 0.1 m/s | 5 |
| 2004 | 26.2°C | 21.2°C | 16.2°C | 30.7°C | 10.2°C | 163 mm | 82% | 0.2 m/s | 4.9 |
| 2003 | 27.3°C | 22.5°C | 17.6°C | 31.4°C | 10.6°C | 139 mm | 83% | 0.1 m/s | 4.9 |
| 2002 | 30.8°C | 24.2°C | 17.5°C | 37.1°C | 13.7°C | 100 mm | 62% | 0.2 m/s | 5.5 |
| 2001 | 31.1°C | 24.5°C | 18.0°C | 39.1°C | 13.1°C | 80 mm | 65% | 0.2 m/s | 5.1 |
| 2000 | 25.5°C | 20.4°C | 15.2°C | 32.5°C | 8.8°C | 96 mm | 81% | 0.2 m/s | 5 |
| 1999 | 28.8°C | 22.5°C | 16.3°C | 36.0°C | 11.2°C | 93 mm | 64% | 0.2 m/s | 5.1 |
| 1998 | 29.2°C | 23.0°C | 16.7°C | 32.6°C | 10.1°C | 61 mm | 68% | 0.2 m/s | 5.5 |
| 1997 | 27.2°C | 21.2°C | 15.3°C | 32.4°C | 11.4°C | 131 mm | 70% | 0.2 m/s | 5.2 |
| 1996 | 27.1°C | 21.4°C | 15.7°C | 32.3°C | 12.0°C | 53 mm | 77% | 0.2 m/s | 5.4 |
| 1995 | 30.8°C | 23.4°C | 16.0°C | 36.0°C | 10.8°C | 46 mm | 59% | 0.2 m/s | 5.8 |
| 1994 | 26.0°C | 20.3°C | 14.7°C | 30.6°C | 9.0°C | 155 mm | 78% | 0.2 m/s | 5.1 |
| 1993 | 29.8°C | 23.3°C | 16.8°C | 35.8°C | 11.7°C | 62 mm | 66% | 0.2 m/s | 5.1 |
| 1992 | 25.8°C | 20.0°C | 14.1°C | 31.4°C | 8.3°C | 104 mm | 76% | 0.2 m/s | 5.4 |
| 1991 | 28.6°C | 22.6°C | 16.6°C | 33.2°C | 12.9°C | 151 mm | 71% | 0.2 m/s | 5.2 |
| 1990 | 26.2°C | 21.1°C | 16.1°C | 31.5°C | 12.0°C | 218 mm | 81% | 0.2 m/s | 4.8 |
| 1989 | 25.8°C | 20.7°C | 15.6°C | 30.1°C | 8.9°C | 118 mm | 79% | 0.2 m/s | 5.1 |
| 1988 | 29.7°C | 23.4°C | 17.2°C | 35.8°C | 8.6°C | 92 mm | 68% | 0.2 m/s | 5.3 |
| 1987 | 27.4°C | 21.0°C | 14.5°C | 34.2°C | 8.6°C | 123 mm | 70% | 0.2 m/s | 5 |
| 1986 ❄️ | 25.3°C | 19.8°C | 14.4°C | 32.4°C | 5.5°C | 105 mm | 76% | 0.2 m/s | 5.2 |
| 1985 | 27.5°C | 21.3°C | 15.1°C | 33.2°C | 11.1°C | 91 mm | 69% | 0.2 m/s | 5.1 |
| 1984 | 26.5°C | 21.2°C | 15.9°C | 29.9°C | 8.5°C | 58 mm | 81% | 0.2 m/s | 5.8 |
| 1983 | 29.0°C | 22.5°C | 16.0°C | 33.7°C | 9.6°C | 90 mm | 70% | 0.2 m/s | — |
| 1982 | 26.4°C | 20.0°C | 13.6°C | 30.7°C | 5.5°C | 81 mm | 68% | 0.2 m/s | — |
| 1981 | 29.0°C | 22.0°C | 15.0°C | 32.4°C | 9.3°C | 32 mm | 63% | 0.2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 28°C with lows near 16.4°C (mean 22.2°C), based on 45 years of NASA POWER data.
August averages 108 mm of rainfall in Danbury, about average for rainfall. The wettest on record was 372 mm in 2011.
The hottest August reached 39.1°C in 2001. The coldest dipped to 5.5°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.6°C. Daytime highs moved from 27.7°C to 28.6°C and overnight lows from 15.1°C to 17.3°C over the same span.
August is one of the warmer months of the year in Danbury and about average for rainfall, so plan for around 28°C daytime highs and 16.4°C at night.
Not quite — August is the 11th coolest month in Danbury, averaging 22.2°C.
For August in Danbury, pack light layers you can adjust through the day, with typical highs of 28°C and lows of 16.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 73% — moderately humid.
Average wind speed in August is 0.2 m/s. The windiest August on record averaged 0.2 m/s (1981).
The wettest August on record was 2011 with 372 mm. On average, August sees 108 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Danbury behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
