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CheckWeather USWilliamsport

Williamsport weather

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Williamsport weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Williamsport weather in numbers

from 30 years of measured normals

Williamsport swings 59°F across the year, from 85°F highs in July to 26°F lows in February, and August is usually the wettest month in a year that brings about 47 in of precipitation.

Warmest month
July
85°F average high
Coldest month
February
26°F average low
Wettest month
August
47 in a year
Below freezing
4 months
January, February, March and December
Comfortable
4 months
April, May, September and October
Residents
29,000
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The weather map: all three models at once

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

where the models agree, and where they split

Williamsport, Pennsylvania (PA) is at its warmest in Jul (average highs near 85°F) and coldest in Feb (lows around 26°F), with roughly 47 in of precipitation across the year. Below, compare what NWS, American, European forecast for Williamsport 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.

Williamsport climate by month

average daytime high and overnight low across a typical year
Jan
39°
27°
Feb
45°
26°
Mar
49°
31°
Apr
63°
41°
May
72°
49°
Jun
80°
58°
Jul
85°
64°
Aug
80°
61°
Sep
74°
56°
Oct
64°
45°
Nov
51°
35°
Dec
41°
28°

Which forecast is most accurate in Williamsport?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
95
/100rank #1
89±1.1°F98±0.7 mph100100% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
72
/100rank #2
89±1.1°F96±1.2 mph3665% 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 Williamsport today?
On this page we show what NWS, American, European each forecast for Williamsport 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 Williamsport today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Williamsport 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 Williamsport?
Over the last 30 days, the European model has been the most accurate for Williamsport (CheckWeather Score 95/100), ahead of the American at 72. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Williamsport?
July is typically the warmest month in Williamsport, with average highs around 85°F.
How cold does Williamsport get?
The coldest month in Williamsport is February, when overnight lows average about 26°F.
How much rain does Williamsport get?
Williamsport sees roughly 47 in of precipitation a year, with August usually the wettest month.

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