Skip to main content
Every US forecast, compared
checkweather.io
CheckWeather USDerby

Derby weather

Loading live data…

NWSNational Blend (NBM)
64°
Mainly clear
Feels 67° · Wind 1 mph · Humidity 91%
AmericanNOAA GFS
64°
Clear
Feels 66° · Wind 4 mph · Humidity 84%
EuropeanECMWF
67°
Light drizzle
Feels 69° · Wind 4 mph · Humidity 78%

Latest for Derby: NWS (National Blend (NBM)): 64° Mainly clear · American (NOAA GFS): 64° Clear · European (ECMWF): 67° Light drizzle.

The weather map: all three models at once

NWS, American, European side by side around Derby and nearby towns.Live rain radar →
Loading the three model maps…

Next 14 hours

consensus of the three models

14-day forecast

where the models agree, and where they split

Derby, CT is at its warmest in Jul (average highs near 83°F) and coldest in Feb (lows around 27°F), with roughly 58 in of precipitation across the year. Below, compare what NWS, American, European forecast for Derby right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Derby climate by month

average daytime high and overnight low across a typical year
Jan
42°
29°
Feb
43°
27°
Mar
50°
33°
Apr
59°
42°
May
69°
50°
Jun
78°
59°
Jul
83°
67°
Aug
79°
64°
Sep
74°
58°
Oct
66°
49°
Nov
53°
37°
Dec
44°
31°

Which forecast is most accurate in Derby?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
European logo
European ★ Best
84
/100rank #1
88±1.2°F95±1.7 mph7184% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
67
/100rank #2
91±0.9°F97±0.9 mph1855% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

Common questions

What's the weather in Derby today?
On this page we show what NWS, American, European each forecast for Derby today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Derby today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Derby and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Derby?
Over the last 30 days, the European model has been the most accurate for Derby (CheckWeather Score 84/100), ahead of the American at 67. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Derby?
July is typically the warmest month in Derby, with average highs around 83°F.
How cold does Derby get?
The coldest month in Derby is February, when overnight lows average about 27°F.
How much rain does Derby get?
Derby sees roughly 58 in of precipitation a year, with April usually the wettest month.

Nearby

More US weather