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Forecast confidence: High · models disagree by 4°F

Iowa City weather

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Rain,rain likely tomorrow

NWS, the American and the European model agree on a high near 75° in Iowa City today. Tomorrow looks rain around 82°, with a 82% chance of rain.

75°65°
82°69°
70°62°
62°58°
62°53°
66°48°
Todaymodels agreeTomorrowmodels agreeSundaymodels agreeMondaymodels agreeTuesdaymodels agreeWednesdaysplit ±6°
NWSNational Blend (NBM)
75°
Rain
Today 75°·Low 65°·Rain 45%
AmericanNOAA GFS
74°
Cloudy
Today 74°·Low 64°·Rain 45%
EuropeanECMWF
77°
Drizzle
Today 77°·Low 65°·Rain 100%
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Iowa City weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Iowa City weather in numbers

from 30 years of measured normals

Iowa City swings 65°F across the year, from 83°F highs in June to 18°F lows in January, and July is usually the wettest month in a year that brings about 35 in of precipitation.

Warmest month
June
83°F average high
Coldest month
January
18°F average low
Wettest month
July
35 in a year
Below freezing
3 months
January, February and December
Comfortable
3 months
April, May and October
Residents
74,000
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The weather map: all three models at once

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

where the models agree, and where they split
Today
Rain
75° 65°
models agree
Tomorrow
Rain
82° 69°
models agree
Sun
Rain
70° 62°
models agree
Mon
Light drizzle
62° 58°
models agree
Tue
Light drizzle
62° 53°
models agree
Wed
Cloudy
66° 48°
±6°
Thu
Cloudy
66° 53°
±6°
Fri
Partly cloudy
66° 55°
models agree
Sat
Partly cloudy
69° 56°
±5°
Sun
Partly cloudy
69° 55°
±9°
Mon
Light drizzle
66° 55°
±5°
Tue
Clear
58° 50°
±13°
Wed
Mostly clear
65° 46°
±5°
Thu
Cloudy
73° 50°
models agree

Iowa City, Iowa (IA) is at its warmest in Jun (average highs near 83°F) and coldest in Jan (lows around 18°F), with roughly 35 in of precipitation across the year. Below, compare what NWS, American, European forecast for Iowa City 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.

Iowa City climate by month

average daytime high and overnight low across a typical year
Jan
31°
18°
Feb
45°
24°
Mar
50°
32°
Apr
62°
41°
May
75°
54°
Jun
83°
64°
Jul
82°
65°
Aug
82°
65°
Sep
79°
59°
Oct
67°
48°
Nov
50°
35°
Dec
40°
28°

Which forecast is most accurate in Iowa City?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
88
/100rank #1
93±0.7°F95±1.5 mph7687% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
71
/100rank #2
81±1.9°F95±1.7 mph4268% 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 77°±55%45% to 100% chance
Tomorrow±3°80° to 83°±25%57% to 82% chance
Sun±2°69° to 71°±9%61% to 70% chance
Mon±3°61° to 64°±4%48% to 52% chance
Tue±4°60° to 63°±8%33% to 41% 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 Iowa City

today, local time
Sunrise
06:49
Sunset
19:10
Daylight
12h 21m

Common questions

What's the weather in Iowa City today?
On this page we show what NWS, American, European each forecast for Iowa City 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 Iowa City today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Iowa City 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 Iowa City?
Over the last 30 days, the European model has been the most accurate for Iowa City (CheckWeather Score 88/100), ahead of the American at 71. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Iowa City?
June is typically the warmest month in Iowa City, with average highs around 83°F.
How cold does Iowa City get?
The coldest month in Iowa City is January, when overnight lows average about 18°F.
How much rain does Iowa City get?
Iowa City sees roughly 35 in of precipitation a year, with July usually the wettest month.

Nearby

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