September weather forecastLe Havre, France
September
Weather in September
September signifies the transition from summer to fall in Le Havre, France. There is a slight drop in the monthly average high temperature from August with a value of 17.9°C (64.2°F) to 15.7°C (60.3°F) in September. Although this month ushers in milder weather, it still provides ample sunlight and warm seas that are a carryover from summer. As in the transition months, the rain does pick up, but the city remains mostly dry compared to the winter months. While the wind speed takes a slight hike, its effect on the overall weather pattern is barely noticeable.Temperature
The beginning of September in Le Havre reveals an average high-temperature of a still comfortable 17.9°C (64.2°F), showing minimal deviation from the previous month. Le Havre's nighttime average temperature in September subtly descends to a mild 14.6°C (58.3°F) from the daily highs.Humidity
September is the least humid month, with an average relative humidity of 78%.Rainfall
In Le Havre, during September, the rain falls for 14 days and regularly aggregates up to 37mm (1.46") of precipitation. In Le Havre, during the entire year, the rain falls for 185.9 days and collects up to 521mm (20.51") of precipitation.Snowfall
In Le Havre, snow does not fall in May through November.Sea temperature
With an average sea temperature of 18.2°C (64.8°F), September is the month with the warmest seawater.Note: Swimming is not a pleasurable activity for the majority in water at 18.2°C (64.8°F). Breathing control gets harder as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Le Havre, the average length of the day in September is 12h and 36min.On the first day of September, sunrise is at 07:16 and sunset at 20:42. On the last day of the month, sunrise is at 07:58 and sunset at 19:40 CEST.
Sunshine
In September, the average sunshine in Le Havre is 7.3h.UV index
The average daily maximum UV index in September in Le Havre is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Le Havre, France
- Average high temperature in September: 17.9°C
The warmest month (with the highest average high temperature) is August (19.3°C).
The months with the lowest average high temperature are January and February (8.1°C).
- Average low temperature in September: 14.6°C
The month with the highest average low temperature is August (16°C).
The coldest month (with the lowest average low temperature) is February (5.2°C).
Average pressure in September
Le Havre, France
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is September (1018mbar).
The month with the lowest atmospheric pressure is November (1012.2mbar).
Average wind speed in September
Le Havre, France
- Average wind speed in September: 20.2km/h
The windiest month (with the highest average wind speed) is December (29.2km/h).
The calmest months (with the lowest average wind speed) are July and August (18km/h).
Average humidity in September
Le Havre, France
- Average humidity in September: 78%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is September (78%).
Average rainfall in September
Le Havre, France
- Average rainfall in September: 37mm
The wettest months (with the highest rainfall) are November and December (58mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days in September
Le Havre, France
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is December (18.5 days).
The month with the least rainy days is April (12.6 days).
Average snowfall in September
Le Havre, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (6mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Le Havre, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Le Havre, France
- Average sea temperature in September: 18.2°C
The best month for swimming (with the highest average sea temperature) is September (18.2°C).
The coldest months (with the lowest average sea temperature) are February and March (8.8°C).
Average daylight in September /
Average sunshine in September
Le Havre, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 7h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).
Average sunshine days in September
Le Havre, France
- Average sunshine days in September: 13.1 days
The month with the most sunshine days is May (14.3 days).
The month with the least sunshine days is December (8.9 days).
Average UV index in September
Le Havre, France
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and November (UV index 2).
Average cloud cover in September
Le Havre, France
- Average cloud cover in September: 42
The months with the most cloud cover are November and December (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 39).
Average visibility in September
Le Havre, France
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
