Derby, CT Weather
Derby, CT climate is warm during summer when temperatures tend to be in the 70's and very cold during winter when temperatures tend to be in the 30's.
The warmest month of the year is July with an average maximum temperature of 81.90 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 22.90 degrees Fahrenheit.
Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 16 degrees Fahrenheit, and fairly limited during winter with an average difference of 14 degrees Fahrenheit.
The annual average precipitation at Derby is 49.55 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is January with an average rainfall of 4.45 Inches.
Weather Data
Current Conditions
|
Overcast, 45°F | Humidity: 68% | Dewpoint: 35°F |
| Wind Speed: NE 9.2 MPH (8 KT) | Heat Index: 45°F | ||
| Barometer: 30.44 in. | Wind Chill: 40°F |
Weather Forecast
 | Tonight: Mostly cloudy. Lows in the upper 30s. Northeast winds around 10 mph. | |
| Lo: 39°F | ||
 | Hi: 49°F | Monday: Cloudy. A chance of rain...Mainly in the afternoon. Highs in the upper 40s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent. |
| Lo: 45°F | ||
 | Hi: 51°F | Tuesday: Mostly cloudy. Light rain likely in the morning. Highs in the lower 50s. Northeast winds 10 to 15 mph. Chance of rain 60 percent. |
| Lo: 39°F | ||
 | Hi: 55°F | Wednesday: Partly sunny. Highs in the mid 50s. |
| Lo: 39°F | ||
| Hi: 55°F | Thanksgiving day: Cloudy with a 40 percent chance of rain. Highs in the mid 50s. |
| Lo: 39°F | ||
| Hi: 49°F | Friday: Cloudy with a 50 percent chance of rain. Highs in the upper 40s. |
| Lo: 31°F | ||
| Hi: 41°F | Saturday: Partly sunny. A chance of rain in the morning. Breezy with highs in the lower 40s. Chance of rain 30 percent. |
| Lo: 29°F |
Moon, Sunrise and Sunset
 |
Moon Phase: Waxing Crescent Moon | Civil Twilight: 6:17 AM EST |
Sunrise: 6:48 AM EST |
| Sunset: 4:28 PM EST |
Civil Twilight: 4:58 PM EST |
Normal Climate
Normal Temperatures
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max °F | 36.9 | 38.8 | 46.9 | 57.0 | 67.4 | 76.4 | 81.9 | 80.7 | 73.6 | 63.1 | 52.6 | 42.1 | 59.8 |
| Mean °F | 29.9 | 31.9 | 39.5 | 48.9 | 59.0 | 68.0 | 74.0 | 73.1 | 65.7 | 54.7 | 45.1 | 35.1 | 52.1 |
| Min °F | 22.9 | 24.9 | 32.0 | 40.7 | 50.6 | 59.6 | 66.0 | 65.4 | 57.7 | 46.3 | 37.5 | 28.0 | 44.3 |
Normal Precipitation
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inch | 4.45 | 3.23 | 4.24 | 4.38 | 4.38 | 3.84 | 3.97 | 4.16 | 4.07 | 4.44 | 4.38 | 4.01 | 49.55 |
