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Forecast confidence: High · models disagree by 4°F

Nampa weather

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Light drizzle,rain likely tomorrow

NWS, the American and the European model agree on a high near 75° in Nampa today. Tomorrow looks light drizzle around 77°, with a 37% chance of rain.

75°57°
77°55°
82°54°
84°58°
86°58°
90°59°
Todaymodels agreeTomorrowmodels agreeSundaymodels agreeMondaysplit ±4°Tuesdaysplit ±5°Wednesdaysplit ±10°
NWSNational Blend (NBM)
74°
Light drizzle
Today 74°·Low 54°·Rain 20%
AmericanNOAA GFS
75°
Cloudy
Today 75°·Low 59°·Rain 20%
EuropeanECMWF
78°
Light drizzle
Today 78°·Low 58°·Rain 33%
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Nampa weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Nampa weather in numbers

from 30 years of measured normals

Nampa swings 72°F across the year, from 97°F highs in July to 25°F lows in January, and December is usually the wettest month in a year that brings about 16 in of precipitation.

Warmest month
July
97°F average high
Coldest month
January
25°F average low
Wettest month
December
16 in a year
Below freezing
4 months
January, February, March and December
Comfortable
3 months
April, May and October
Residents
90,000
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The weather map: all three models at once

NWS, American, European side by side around Nampa and nearby towns.Live rain radar →
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Nampa 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

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Nampa 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Light drizzle
75° 57°
models agree
Tomorrow
Light drizzle
77° 55°
models agree
Sun
Mostly clear
82° 54°
models agree
Mon
Cloudy
84° 58°
±4°
Tue
Mostly clear
86° 58°
±5°
Wed
Mostly clear
90° 59°
±10°
Thu
Mostly clear
92° 62°
±8°
Fri
Partly cloudy
88° 64°
±10°
Sat
Mostly clear
82° 60°
±13°
Sun
Mostly clear
76° 55°
±14°
Mon
Mostly clear
77° 53°
±21°
Tue
Cloudy
84° 55°
±5°
Wed
Cloudy
80° 56°
±6°
Thu
Mostly clear
65° 53°
models agree

Nampa, Idaho (ID) is at its warmest in Jul (average highs near 97°F) and coldest in Jan (lows around 25°F), with roughly 16 in of precipitation across the year. Below, compare what NWS, American, European forecast for Nampa 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.

Nampa climate by month

average daytime high and overnight low across a typical year
Jan
39°
25°
Feb
47°
29°
Mar
50°
31°
Apr
61°
39°
May
74°
49°
Jun
83°
58°
Jul
97°
68°
Aug
91°
64°
Sep
81°
56°
Oct
67°
44°
Nov
49°
33°
Dec
41°
29°

Which forecast is most accurate in Nampa?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
88
/100rank #1
93±0.7°F97±0.8 mph7687% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
86
/100rank #2
89±1.1°F95±1.6 mph7687% 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)
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AmericanNOAA GFS
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EuropeanECMWF
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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±4°74° to 78°±13%20% to 33% chance
Tomorrow±2°77° to 78°±22%15% to 37% chance
Sun±4°80° to 84°±2%0% to 2% chance
Mon±4°82° to 86°models agree0% to 0% chance
Tue±5°83° to 88°models agree1% to 1% 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 Nampa

today, local time
Sunrise
07:29
Sunset
19:50
Daylight
12h 21m

Common questions

What's the weather in Nampa today?
On this page we show what NWS, American, European each forecast for Nampa 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 Nampa today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Nampa 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 Nampa?
Over the last 30 days, the European model has been the most accurate for Nampa (CheckWeather Score 88/100), ahead of the American at 86. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Nampa?
July is typically the warmest month in Nampa, with average highs around 97°F.
How cold does Nampa get?
The coldest month in Nampa is January, when overnight lows average about 25°F.
How much rain does Nampa get?
Nampa sees roughly 16 in of precipitation a year, with December usually the wettest month.

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