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CheckWeather USJefferson

Jefferson weather

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Jefferson weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Jefferson weather in numbers

from 30 years of measured normals

Jefferson swings 45°F across the year, from 94°F highs in August to 49°F lows in January, and September is usually the wettest month in a year that brings about 62 in of precipitation.

Warmest month
August
94°F average high
Coldest month
January
49°F average low
Wettest month
September
62 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
4 months
January, February, March and April
Residents
11,000
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The weather map: all three models at once

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

where the models agree, and where they split

Jefferson, Louisiana (LA) is at its warmest in Aug (average highs near 94°F) and coldest in Jan (lows around 49°F), with roughly 62 in of precipitation across the year. Below, compare what NWS, American, European forecast for Jefferson 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.

Jefferson climate by month

average daytime high and overnight low across a typical year
Jan
63°
49°
Feb
68°
55°
Mar
72°
59°
Apr
77°
64°
May
85°
72°
Jun
89°
76°
Jul
90°
79°
Aug
94°
81°
Sep
86°
75°
Oct
80°
66°
Nov
71°
61°
Dec
63°
52°

Which forecast is most accurate in the US?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
89
/100rank #1
88±1.2°F96±1.2 mph8491% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
73
/100rank #2
82±1.8°F93±2.3 mph4972% 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 Jefferson today?
On this page we show what NWS, American, European each forecast for Jefferson 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 Jefferson today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Jefferson 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 Jefferson?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Jefferson forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Jefferson?
August is typically the warmest month in Jefferson, with average highs around 94°F.
How cold does Jefferson get?
The coldest month in Jefferson is January, when overnight lows average about 49°F.
How much rain does Jefferson get?
Jefferson sees roughly 62 in of precipitation a year, with September usually the wettest month.

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