Skip to main content
One weather site to rule them all
checkweather.io
Forecast confidence: High · models disagree by 1°F

Nashua weather

Loading live data…

Drizzle,cooler tomorrow

NWS, the American and the European model agree on a high near 77° in Nashua today. Tomorrow looks cloudy around 66°, with a 0% chance of rain.

77°58°
66°49°
60°47°
67°51°
61°47°
62°47°
Todaymodels agreeTomorrowmodels agreeSundaymodels agreeMondaymodels agreeTuesdaymodels agreeWednesdaymodels agree
NWSNational Blend (NBM)
77°
Drizzle
Today 77°·Low 56°·Rain 19%
AmericanNOAA GFS
78°
Cloudy
Today 78°·Low 57°·Rain 19%
EuropeanECMWF
77°
Light drizzle
Today 77°·Low 60°·Rain 85%
CheckWeather.io on iPhoneFree. No ads, no account.

Nashua weather alerts and warnings

active National Weather Service watches, warnings and advisories

Checking the National Weather Service for active alerts covering Nashua…

Nashua weather in numbers

from 30 years of measured normals

Nashua swings 61°F across the year, from 84°F highs in July to 23°F lows in February, and March is usually the wettest month in a year that brings about 51 in of precipitation.

Warmest month
July
84°F average high
Coldest month
February
23°F average low
Wettest month
March
51 in a year
Below freezing
4 months
January, February, March and December
Comfortable
4 months
May, June, September and October
Residents
88,000
share this forecast

The weather map: all three models at once

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

Nashua hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

Loading the three models…

Nashua 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Drizzle
77° 58°
models agree
Tomorrow
Cloudy
66° 49°
models agree
Sun
Light rain
60° 47°
models agree
Mon
Light drizzle
67° 51°
models agree
Tue
Cloudy
61° 47°
models agree
Wed
Partly cloudy
62° 47°
models agree
Thu
Light rain
59° 46°
±12°
Fri
Light rain
60° 48°
±10°
Sat
Drizzle
64° 49°
±11°
Sun
Partly cloudy
67° 49°
±14°
Mon
Light drizzle
68° 52°
±13°
Tue
Light drizzle
68° 53°
±13°
Wed
Rain
69° 56°
±13°
Thu
Heavy drizzle
69° 53°
models agree

Nashua, New Hampshire (NH) is at its warmest in Jul (average highs near 84°F) and coldest in Feb (lows around 23°F), with roughly 51 in of precipitation across the year. Below, compare what NWS, American, European forecast for Nashua 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.

Nashua climate by month

average daytime high and overnight low across a typical year
Jan
38°
24°
Feb
42°
23°
Mar
47°
29°
Apr
59°
38°
May
70°
48°
Jun
78°
58°
Jul
84°
66°
Aug
79°
61°
Sep
74°
56°
Oct
64°
46°
Nov
50°
34°
Dec
42°
28°

Which forecast is most accurate in Nashua?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
94
/100rank #1
95±0.5°F99±0.4 mph8994% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
77
/100rank #2
86±1.4°F95±1.6 mph5374% 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.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
Loading ratings…
AmericanNOAA GFS
Loading ratings…
EuropeanECMWF
Loading ratings…

One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±1°77° to 78°±66%19% to 85% chance
Tomorrow±2°66° to 67°models agree0% to 0% chance
Sun±3°58° to 61°±15%85% to 100% chance
Mon±3°66° to 69°±3%72% to 75% chance
Tue±3°60° to 63°models agree2% to 2% chance

The models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in Nashua

today, local time
Sunrise
06:28
Sunset
18:50
Daylight
12h 22m

Common questions

What's the weather in Nashua today?
On this page we show what NWS, American, European each forecast for Nashua 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 Nashua today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Nashua 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 Nashua?
Over the last 30 days, the European model has been the most accurate for Nashua (CheckWeather Score 94/100), ahead of the American at 77. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Nashua?
July is typically the warmest month in Nashua, with average highs around 84°F.
How cold does Nashua get?
The coldest month in Nashua is February, when overnight lows average about 23°F.
How much rain does Nashua get?
Nashua sees roughly 51 in of precipitation a year, with March usually the wettest month.

Nearby

More US weather