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CheckWeather USNorristown

Norristown weather

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Norristown weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Norristown weather in numbers

from 30 years of measured normals

Norristown swings 58°F across the year, from 88°F highs in July to 30°F lows in February, and August is usually the wettest month in a year that brings about 47 in of precipitation.

Warmest month
July
88°F average high
Coldest month
February
30°F average low
Wettest month
August
47 in a year
Below freezing
2 months
January and February
Comfortable
4 months
April, May, September and October
Residents
34,000
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The weather map: all three models at once

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

where the models agree, and where they split

Norristown, Pennsylvania (PA) is at its warmest in Jul (average highs near 88°F) and coldest in Feb (lows around 30°F), with roughly 47 in of precipitation across the year. Below, compare what NWS, American, European forecast for Norristown 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.

Norristown climate by month

average daytime high and overnight low across a typical year
Jan
45°
31°
Feb
48°
30°
Mar
53°
34°
Apr
66°
45°
May
74°
52°
Jun
84°
61°
Jul
88°
69°
Aug
84°
65°
Sep
77°
59°
Oct
69°
49°
Nov
55°
38°
Dec
46°
32°

Which forecast is most accurate in Norristown?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
94
/100rank #1
89±1.1°F95±1.6 mph100100% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
75
/100rank #2
86±1.4°F95±1.6 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 Norristown today?
On this page we show what NWS, American, European each forecast for Norristown 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 Norristown today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Norristown 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 Norristown?
Over the last 30 days, the European model has been the most accurate for Norristown (CheckWeather Score 94/100), ahead of the American at 75. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Norristown?
July is typically the warmest month in Norristown, with average highs around 88°F.
How cold does Norristown get?
The coldest month in Norristown is February, when overnight lows average about 30°F.
How much rain does Norristown get?
Norristown sees roughly 47 in of precipitation a year, with August usually the wettest month.

Nearby

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