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CheckWeather USMason City

Mason City weather

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Mason City weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Mason City weather in numbers

from 30 years of measured normals

Mason City swings 66°F across the year, from 81°F highs in June to 15°F lows in January, and July is usually the wettest month in a year that brings about 34 in of precipitation.

Warmest month
June
81°F average high
Coldest month
January
15°F average low
Wettest month
July
34 in a year
Below freezing
4 months
January, February, March and December
Comfortable
3 months
May, September and October
Residents
27,000
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The weather map: all three models at once

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

where the models agree, and where they split

Mason City, Iowa (IA) is at its warmest in Jun (average highs near 81°F) and coldest in Jan (lows around 15°F), with roughly 34 in of precipitation across the year. Below, compare what NWS, American, European forecast for Mason 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.

Mason City climate by month

average daytime high and overnight low across a typical year
Jan
27°
15°
Feb
40°
19°
Mar
46°
26°
Apr
59°
39°
May
73°
52°
Jun
81°
62°
Jul
80°
63°
Aug
81°
64°
Sep
77°
59°
Oct
64°
47°
Nov
47°
32°
Dec
37°
24°

Which forecast is most accurate in Mason City?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
88
/100rank #1
94±0.6°F97±1.0 mph7687% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
77
/100rank #2
91±0.9°F95±1.5 mph4771% 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.

Common questions

What's the weather in Mason City today?
On this page we show what NWS, American, European each forecast for Mason 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 Mason City today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Mason 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 Mason City?
Over the last 30 days, the European model has been the most accurate for Mason City (CheckWeather Score 88/100), 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 Mason City?
June is typically the warmest month in Mason City, with average highs around 81°F.
How cold does Mason City get?
The coldest month in Mason City is January, when overnight lows average about 15°F.
How much rain does Mason City get?
Mason City sees roughly 34 in of precipitation a year, with July usually the wettest month.

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