Derby

Naugatuck Valley Planning Region, Connecticut, United States

Unlock Minute-by-Minute Forecast

See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.

Current Weather

20°

Clear

Feels Like: 19°

Min: 10°

Max: 20°

The next few hours will be clear, with today reaching 20°C and dropping to 14°C. The coming days will be drizzle

Unlock Historical Data

Compare today's weather with yesterday's data and track temperature trends over time.

Hourly Forecast

19° 20° 20° 20° 19° 17° 16° 16° 15° 15° 15° 15° 15° 14° 14° 14° 14° 13° 15° 17° 19° 20° 21° 22°
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm
11pm
12am
1am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12pm
1pm
Today
Tomorrow

Daylight Hours

06:39

Sunrise

18:54

Sunset

12 hours 15 minutes of sunlight today

Moon

Waxing Crescent

11:29

Moonrise

20:25

Moonset

Daily Forecast

Today

10°
20°

Wednesday

13°
24°

Thursday

17°
24°

Friday

16°
24°

Saturday

12°
18°

Sunday

15°
19°

Monday

15°
20°

Tuesday

14°
19°

Wednesday

13°
21°

Thursday

15°
22°

Air Quality Data Available

Upgrade to access real-time air quality data for Derby.

UV Index

Wear sunscreen
5 Moderate
Low Extreme

Humidity

59% Comfortable
Low High

Weather in Derby today, September 15, 2026

Expect a mostly clear day in Derby on September 15, 2026, with sunshine dominating from morning through evening. Cloud should stay limited, so the overall feel remains bright and settled.

The day peaks near 20°C and cools toward 10°C. Expect humidity between 57% and 88%, most humid near 22:00. Expect gentle winds, highest near 21:00 at 2.3 km/h.

Through the afternoon skies look more workable, with cloud near 6% around 22:00. Later outdoor plans have a clearer window than the morning may have suggested. Views remain open at about 16.1 km. Sunrise is at 06:39 and sunset at 18:54, giving 12 hours 15 minutes of sunlight today.

Taken together, settled sunshine in Derby on September 15, 2026 makes outdoor timing easier, with highs near 20°C.

Frequently asked questions about weather in Derby

How warm does it get in Derby?

The warmest month in Derby is July, with average high temperatures of 27°C. The average temperature during this period is around 24°C.

How cold does it get in Derby?

The coldest month in Derby is January, with average low temperatures of -1°C. The average temperature during this period is around 1°C.

What is the wettest time of year in Derby?

The wettest month in Derby is December, with an average of 156mm of precipitation.

What is the driest time of year in Derby?

The driest month in Derby is June, with an average of 78mm of precipitation.

View full climate insights for Derby →

Airpult

Get accurate weather forecasts worldwide with real-time updates and severe weather alerts. Covering 6M+ locations with precise, reliable weather data.

© 2026 Samuenti GmbH. All rights reserved.

gb English
Metric (°C, km/h)