Monthly climate guide
Baton Rouge weather in September
September in Baton Rouge is typically hot, with average daytime highs around 31°C (88°F) and night-time lows near 21°C (70°F). The month usually brings about 111 mm of rain (wet) and is a mix of sun and cloud. Daytime highs are 2°C cooler than August and 3°C warmer than October.
What stands out in September
- Humidity near 79% makes 31°C feel stickier than it sounds.
- September brings early autumn to Baton Rouge.
- Skies are at their clearest this time of year.
- Just 120 km apart, but Baton Rouge runs about 2°C warmer than New Orleans this month.
Avg high
31°C
88°F
Avg low
21°C
70°F
Rainfall
111 mm
wet
Humidity
79%
relative
Sky
42%
cloud · a mix of sun and cloud
Baton Rouge weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 16°C / 61°F | 4°C / 40°F | 141 mm | 83% | 57% |
| February | 19°C / 66°F | 7°C / 45°F | 117 mm | 85% | 63% |
| March | 23°C / 73°F | 11°C / 51°F | 116 mm | 83% | 59% |
| April | 26°C / 78°F | 14°C / 57°F | 137 mm | 81% | 53% |
| May | 30°C / 85°F | 18°C / 65°F | 155 mm | 77% | 47% |
| June | 32°C / 90°F | 22°C / 72°F | 157 mm | 78% | 51% |
| July | 33°C / 91°F | 23°C / 74°F | 158 mm | 79% | 55% |
| August | 33°C / 91°F | 23°C / 74°F | 191 mm | 79% | 53% |
| September | 31°C / 88°F | 21°C / 70°F | 111 mm | 79% | 42% |
| October | 28°C / 82°F | 15°C / 59°F | 94 mm | 75% | 35% |
| November | 22°C / 71°F | 9°C / 48°F | 89 mm | 77% | 46% |
| December | 18°C / 65°F | 7°C / 44°F | 133 mm | 85% | 63% |
What to pack for September
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- A compact umbrella or packable rain jacket
- Water-resistant shoes
- Quick-dry fabrics — it feels stickier than the temperature suggests
Is September a good time to visit Baton Rouge?
Compare the months in the chart above to find your ideal window.
Best time to visit Baton Rouge →Other United States cities in September
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Baton Rouge weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/usa/baton-rouge/september
<a href="https://weathercompare.eu/weather/usa/baton-rouge/september">Baton Rouge weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/usa/baton-rouge" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Baton Rouge weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/usa/baton-rouge/september">Baton Rouge weather in September</a> – WeatherCompare</p>
Baton Rouge in September: quick answers
Is September a good time to visit Baton Rouge?
It can be, if you like heat: September highs in Baton Rouge are around 31°C. Good for the beach; plan sightseeing for early morning and evening.
How warm is Baton Rouge in September?
Average highs are about 31°C (88°F) and average lows about 21°C (70°F), based on 10 years of daily data.
Does it rain a lot in Baton Rouge in September?
Baton Rouge typically gets around 111 mm of rain in September — wet.
Figures are long-term averages for the area around Baton Rouge (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.