Old Jefferson weather
Loading live data…
Old Jefferson weather alerts and warnings
active National Weather Service watches, warnings and advisoriesChecking the National Weather Service for active alerts covering Old Jefferson…
Old Jefferson weather in numbers
from 30 years of measured normalsOld Jefferson swings 48°F across the year, from 91°F highs in August to 43°F lows in January, and June is usually the wettest month in a year that brings about 70 in of precipitation.
The weather map: all three models at once
NWS, American, European side by side around Old Jefferson and nearby towns.Live rain radar →Old Jefferson hourly forecast: next 14 hours
consensus of the three modelsRain in the next 24 hours, model by model
each model's own hourly precipitation, side by sideLoading the three models…
Old Jefferson 10-day forecast, out to 14 days
where the models agree, and where they splitOld Jefferson, Louisiana (LA) is at its warmest in Aug (average highs near 91°F) and coldest in Jan (lows around 43°F), with roughly 70 in of precipitation across the year. Below, compare what NWS, American, European forecast for Old 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.
Old Jefferson climate by month
average daytime high and overnight low across a typical year (1991-2020)Source: 1991-2020 averages, ERA5 for this place adjusted with NASA POWER.
How the weather around Old Jefferson has changed since 1995
Old Jefferson sits in the same roughly 50 km square of NASA's reanalysis as Baton Rouge. That square ran 1.1°F warmer in 2015-2024 than in 1995-2004. See the full 30-year picture on the Baton Rouge page.
Which forecast is most accurate in the US?
CheckWeather Score, graded against the weather that actually happened
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 countsThe 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.
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.