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Forecast confidence: High · models disagree by 3°F

Casper weather

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Light rain,rain likely tomorrow

NWS, the American and the European model agree on a high near 80° in Casper today. Tomorrow looks light drizzle around 73°, with a 75% chance of rain.

80°56°
73°53°
65°49°
70°47°
77°50°
76°56°
Todaymodels agreeTomorrowsplit ±5°Sundaysplit ±5°Mondaysplit ±5°Tuesdaymodels agreeWednesdaysplit ±7°
NWSNational Blend (NBM)
79°
Light rain
Today 79°·Low 56°·Rain 25%
AmericanNOAA GFS
82°
Fog
Today 82°·Low 55°·Rain 25%
EuropeanECMWF
80°
Light drizzle
Today 80°·Low 56°·Rain 72%
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Casper weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Casper weather in numbers

from 30 years of measured normals

Casper swings 73°F across the year, from 88°F highs in July to 15°F lows in January, and May is usually the wettest month in a year that brings about 14 in of precipitation.

Warmest month
July
88°F average high
Coldest month
January
15°F average low
Wettest month
May
14 in a year
Below freezing
5 months
January, February, March, November and December
Comfortable
2 months
June and October
Residents
60,000
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The weather map: all three models at once

NWS, American, European side by side around Casper and nearby towns.Live rain radar →
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Casper 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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Casper 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Light rain
80° 56°
models agree
Tomorrow
Light drizzle
73° 53°
±5°
Sun
Heavy drizzle
65° 49°
±5°
Mon
Light drizzle
70° 47°
±5°
Tue
Mostly clear
77° 50°
models agree
Wed
Light drizzle
76° 56°
±7°
Thu
Mostly clear
79° 54°
models agree
Fri
Mostly clear
81° 56°
models agree
Sat
Light drizzle
78° 59°
models agree
Sun
Mostly clear
72° 52°
±15°
Mon
Light drizzle
71° 49°
±17°
Tue
Cloudy
74° 52°
±8°
Wed
Light drizzle
79° 54°
models agree
Thu
Light drizzle
75° 56°
±8°

Casper, Wyoming (WY) is at its warmest in Jul (average highs near 88°F) and coldest in Jan (lows around 15°F), with roughly 14 in of precipitation across the year. Below, compare what NWS, American, European forecast for Casper 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.

Casper climate by month

average daytime high and overnight low across a typical year
Jan
29°
15°
Feb
34°
20°
Mar
41°
21°
Apr
52°
32°
May
66°
43°
Jun
78°
54°
Jul
88°
60°
Aug
85°
60°
Sep
79°
53°
Oct
62°
39°
Nov
44°
28°
Dec
41°
27°

Which forecast is most accurate in Casper?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
American logo
American ★ Best
89
/100rank #1
87±1.3°F91±2.7 mph8994% hitNOAA / NCEP (United States)College Park, Maryland, USA
European logo
European
78
/100rank #2
81±1.9°F82±5.6 mph7184% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom

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±3°79° to 82°±47%25% to 72% chance
Tomorrow±5°71° to 76°±46%29% to 75% chance
Sun±5°62° to 68°±4%69% to 73% chance
Mon±5°68° to 73°±23%10% to 33% chance
Tue±3°75° to 79°±5%2% to 7% 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 Casper

today, local time
Sunrise
06:48
Sunset
19:09
Daylight
12h 21m

Common questions

What's the weather in Casper today?
On this page we show what NWS, American, European each forecast for Casper 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 Casper today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Casper 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 Casper?
Over the last 30 days, the American model has been the most accurate for Casper (CheckWeather Score 89/100), ahead of the European at 78. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Casper?
July is typically the warmest month in Casper, with average highs around 88°F.
How cold does Casper get?
The coldest month in Casper is January, when overnight lows average about 15°F.
How much rain does Casper get?
Casper sees roughly 14 in of precipitation a year, with May usually the wettest month.

Nearby

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