Boulogne-sur-Mer in september: average Weather, Temperature and Climate
Weather in Boulogne-sur-Mer in september 2025
The weather in Boulogne-sur-Mer in september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather
Weather at 6am
59°F
Clear/Sunny
35% of time
28%
17%
15%
Weather at 12pm
65°F
Clear/Sunny
37% of time
26%
19%
14%
Weather at 6pm
63°F
Clear/Sunny
41% of time
28%
15%
14%
Weather at 3am
59°F
38%
29%
20%
10%
Evolution of daily average temperature and precipitation in Boulogne-sur-Mer in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Boulogne-sur-Mer in september.
The climate of Boulogne-sur-Mer in september is good
The climate in september in Boulogne-sur-Mer is quite dry (with 2.6in of rainfall over 4 days). It should be noted an improvement from the previous month since in august it receives an average of 3.9in of rainfall over 6 days.
The climate is rather cool in that locality this month, but it is livable when dressing hot. The thermometer averaged maximum of 65°F. On average, the recorded minimum temperature is 59°F. Thus, the mean temperature average on this month of september in Boulogne-sur-Mer is 61°F. Note that these seasonal averages are in contrast with those observed in Boulogne-sur-Mer in the month of september with a maximum record of 79°F in 2016 and a minimum record of 47°F in 2020. You can hope to have about 15 days with temperatures above 65°F, or 50% of the month.
On this month of september, day length in Boulogne-sur-Mer is generally 12:38. Sunrise is at 06:29 and sunset is at 19:07.
With a good weather, this month is a good month to go there.
Seasonal average climate and temperature of Boulogne-sur-Mer in september
Check below seasonal norms These datas are set from the weather statements of the past years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 61°F | ||||
| Highest temperature | 65°F | ||||
| Lowest temperature | 59°F | ||||
| Highest record temperature | 79°F (2016) | ||||
| Lowest record temperature | 47°F (2020) | ||||
| Number of days at +65°F | 15 day(s) (50%) | ||||
| Sea temperature | |||||
| Average sea temperature | 65°F | ||||
| Lowest sea temperature | 63°F | ||||
| Highest sea temperature | 67°F | ||||
| Wind | |||||
| Wind speed | 24km/h | ||||
| Wind temperature | 58°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 2.6in | ||||
| Number of days with rainfall | 4 day(s) (15%) | ||||
| Record daily rainfall | 1.6in (2010) | ||||
| Other climate data | |||||
| Humidity | 84% | ||||
| Visibility | 9.53km | ||||
| Cloud cover | 38% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:29 | ||||
| Time of sunset | 19:07 | ||||
| Length of day | 12:38 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Boulogne-sur-Mer in september 2024:
68°F to 83°F
65°F to 68°F
63°F to 68°F
61°F to 67°F
59°F to 63°F
61°F to 65°F
63°F to 79°F
58°F to 63°F
61°F to 63°F
59°F to 63°F
54°F to 58°F
50°F to 58°F
54°F to 61°F
52°F to 59°F
54°F to 63°F
58°F to 65°F
59°F to 65°F
59°F to 74°F
59°F to 74°F
58°F to 72°F
59°F to 72°F
63°F to 67°F
59°F to 63°F
59°F to 61°F
58°F to 61°F
59°F to 63°F
52°F to 58°F
49°F to 54°F
47°F to 56°F
56°F to 61°F
Map: other cities in the North of France in september
Cities near Boulogne-sur-Mer:
| Le Portel in september | good weather |
| Wimereux in september | good weather |
| Equihen-Plage in september | good weather |
| Ambleteuse in september | good weather |
| Hardelot-Plage in september | good weather |
| Audresselles in september | good weather |
| Audinghen in september | good weather |
| Dannes in september | good weather |
| Tardinghen in september | good weather |
| Sainte-Cécile-Plage (Camiers) in september | good weather |
| Desvres in september | good weather |
| Wissant in september | good weather |
Click over cities on the map for information about the weather in september.
Boulogne-sur-Mer
perfect weather
good
tolerable
bad
very bad
Weather data for Boulogne-sur-Mer in september:
Weather data for Boulogne-sur-Mer for september are derived from an average of the weather forecast since 2009 in Boulogne-sur-Mer. There is a margin of error and these forecasts are to be considered as general information only. The weather in Boulogne-sur-Mer can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Boulogne-sur-Mer.