Climate averages 1991–2020
Danbury weather
in August.
A warm, wet month: the 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Danbury: daytime highs average 27.1°C and nights cool to about 18.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 115 mm of rain on roughly 11 days, which makes August a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 50 min on an average August day.
The nearest other city in this atlas is Norwalk (31 km away). In August its highs average 27.0°C, about as warm as Danbury, with 103 mm of rain.
Among the 498 cities listed in the United States, Danbury ranks joint 374th of 498 for the warmest August highs and 443rd of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Danbury is 2.8°C cooler than that mean.
From August to September, average highs fall by 4.1°C to 23.0°C, and monthly rainfall falls from 115 mm to 108 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Danbury climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.0°C-6.0°C | -6.0°C | 88 | 9.4 | 9.610 h |
| February | 3.4°C-5.4°C | -5.4°C | 78 | 8.8 | 10.611 h |
| March | 7.8°C-1.5°C | -1.5°C | 106 | 11.1 | 11.912 h |
| April | 14.4°C4.4°C | 4.4°C | 97 | 11.3 | 13.313 h |
| May | 19.9°C10.2°C | 10.2°C | 99 | 12.0 | 14.514 h |
| June | 25.0°C15.6°C | 15.6°C | 111 | 12.0 | 15.115 h |
| July | 28.1°C18.9°C | 18.9°C | 108 | 11.3 | 14.815 h |
| August, selected | 27.1°C18.3°C | 18.3°C | 115 | 10.9 | 13.814 h |
| September | 23.0°C14.6°C | 14.6°C | 108 | 9.3 | 12.513 h |
| October | 16.3°C8.6°C | 8.6°C | 108 | 9.4 | 11.111 h |
| November | 10.1°C2.8°C | 2.8°C | 86 | 8.6 | 9.910 h |
| December | 4.6°C-2.1°C | -2.1°C | 104 | 10.5 | 9.29 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Norwalk in AugustUnited States · 31 kmHigh 27.0°C · Low 19.9°C · 103 mm rain
- Bridgeport in AugustUnited States · 33 kmHigh 26.7°C · Low 19.7°C · 103 mm rain
- Waterbury in AugustUnited States · 38 kmHigh 27.2°C · Low 18.3°C · 104 mm rain
- Stamford in AugustUnited States · 39 kmHigh 27.2°C · Low 19.9°C · 103 mm rain
- New Haven in AugustUnited States · 45 kmHigh 26.3°C · Low 19.6°C · 102 mm rain
- Greenburgh in AugustUnited States · 52 kmHigh 27.3°C · Low 19.5°C · 100 mm rain
- New Britain in AugustUnited States · 63 kmHigh 27.5°C · Low 17.9°C · 100 mm rain
- Yonkers in AugustUnited States · 64 kmHigh 27.6°C · Low 19.5°C · 102 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Danbury) is explained once on the Danbury year overview and on the Sources, method and limits page.