Jacksonville weather in September
Long-run climate averages for Jacksonville, FL in September, plus what the forecast models say for the days ahead.
In September, Jacksonville averages 84°F by day and 72°F at night. It is the wettest month of the year here.
September in Jacksonville averages a daytime high of 84°F and an overnight low of 72°F, which reads as warm for this part of the world. It is also the wettest month, so build rain into any plan. Across the whole year Jacksonville sees roughly 58 inches of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Jacksonville forecast with every model compared and how much they currently agree.
Jacksonville weather by month
what to expect in Jacksonville through the year, 1991-2020 averagesHere is Jacksonville's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Jacksonville by season.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Jacksonville, scoring 94/100 on our CheckWeather Score, ahead of the American at 85. See the full US accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Jacksonville in September?
Is September a good time to visit Jacksonville?
Does it rain a lot in Jacksonville in September?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .