Weather in Paris in September

Daylight on the 15th: 12 h 37 min
Average high: 22 °C (71 °F)
Average low: 11 °C (51 °F)
Precipitation: 45 mm

In September, the area around Paris averages daytime highs of 22 °C (71 °F) and night-time lows of 11 °C (51 °F). Days are mild; a light jacket covers most of it.

Temperature

Compared with August, September is cooler by 3 °C in daytime highs, and October is cooler by 5 °C than September. The daily average is 16 °C (61 °F).

Precipitation, humidity and wind

Precipitation averages about 45 mm over the month, with 9 days of at least 1 mm. Expect some wet days, but not every day.

Relative humidity averages 76 % and wind at 2 m about 2.5 m/s.

Daylight

On 15 September the sun rises at 07:27 and sets at 20:04 local time, for 12 h 37 min of daylight, 106 minutes less than a month earlier.

About these numbers

The figures are 2011-2020 averages for the grid cell around Paris from the NASA POWER project, a model based data set. They describe the area rather than one weather station, and a single year can differ.

Month by month

Month	High	Low	Precipitation
January	7 °C	1 °C	59 mm
February	8 °C	0 °C	51 mm
March	12 °C	2 °C	49 mm
April	16 °C	5 °C	40 mm
May	19 °C	8 °C	70 mm
June	22 °C	12 °C	70 mm
July	25 °C	14 °C	50 mm
August	25 °C	13 °C	56 mm
September	22 °C	11 °C	45 mm
October	17 °C	8 °C	59 mm
November	11 °C	4 °C	62 mm
December	8 °C	2 °C	80 mm

Questions

How warm is Paris in September?

Average highs of 22 °C (71 °F) and lows of 11 °C (51 °F) (2011-2020 averages).

Does it rain a lot in Paris in September?

About 45 mm over the month, on 9 days with at least 1 mm.

Sources

NASA Langley Research Center POWER Project, funded through the NASA Earth Science Directorate Applied Science Program (2026-09-22)
Computed from the city coordinates with the NOAA solar position equations
IANA tz database
Wikidata, CC0 (2026-09-22)