Paris weather in September
In September, Paris has an average high of 21 °C71 °F and an average low of 10 °C51 °F, with about 42 mm1.7 in of precipitation. It is the 4th warmest month of the year and ranks 11th for precipitation.
How September compares with other months
Compared with August, September is 3.3 °C6 °F cooler on average and drier by 17 mm0.7 in. Compared with October, September is 4 °C7.1 °F warmer on average and drier by 15 mm0.6 in. Daylight lasts about 12.5 hours around the middle of the month. Average relative humidity is 76% and the average cloud amount 57%.
Is September a good time to visit Paris?
Yes — September is one of the most comfortable months to visit Paris by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in September
For Paris in September, pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Paris | 2171 | 1051 | 421.7 |
| Saint-Quentin-en-Yvelines | 2069 | 1049 | 421.6 |
| Cergy-Pontoise | 2170 | 1051 | 421.6 |
| Orléans | 2271 | 1051 | 411.6 |
| Rouen | 2068 | 1151 | 481.9 |
| Amiens | 2068 | 1050 | 512.0 |
| Reims | 2169 | 1050 | 471.9 |
| Le Havre | 1966 | 1457 | 542.1 |
| Le Mans | 2272 | 1151 | 421.7 |
Other months in Paris
- January6 °C43 °F / 0 °C33 °F
- February8 °C46 °F / 0 °C32 °F
- March12 °C53 °F / 2 °C36 °F
- April16 °C61 °F / 5 °C41 °F
- May20 °C67 °F / 9 °C48 °F
- June23 °C74 °F / 12 °C54 °F
- July25 °C77 °F / 14 °C57 °F
- August25 °C77 °F / 14 °C57 °F
- September21 °C71 °F / 10 °C51 °F
- October17 °C62 °F / 7 °C45 °F
- November11 °C51 °F / 4 °C39 °F
- December7 °C44 °F / 1 °C34 °F
Frequently asked questions
How warm is Paris in September?
In September the average high in Paris is 21 °C (71 °F) and the average low is 10 °C (51 °F).
Does it rain a lot in Paris in September?
On average about 42 mm (1.7 in) of precipitation falls in September; it ranks 11th of the 12 months.
Is September the warmest month in Paris?
No. The warmest month in Paris is July, with an average high of 25 °C (77 °F). The coldest month is February, with an average low of 0 °C (32 °F).
How long is the day in Paris in September?
In the middle of September the day in Paris lasts about 12.5 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Paris in September?
The average relative humidity in September is about 76%. This is a long-term average for the whole day.
How cloudy is Paris in September?
On average about 57% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 92 m, while Paris lies at about 42 m. Temperatures on this page were therefore adjusted by +0.3 °C0.6 °F using the standard lapse rate of 6.5 °C per 1,000 m.