September weather forecastLannilis, France
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Lannilis, France, with temperature in the range of an average high of 18.6°C (65.5°F) and an average low of 12.7°C (54.9°F).Temperature
Lannilis, France, in September witnesses an average high-temperature of a still refreshing 18.6°C (65.5°F), indicating a slight variation from August's 19.8°C (67.6°F). During September, the nighttime temperature averages to a cool 12.7°C (54.9°F).Humidity
April and September, with an average relative humidity of 80%, are the least humid months.Rainfall
September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 24mm (0.94") of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Lannilis, the average length of the day in September is 12h and 35min.On the first day of September, sunrise is at 07:36 and sunset at 20:59. On the last day of the month, sunrise is at 08:16 and sunset at 19:58 CEST.
Sunshine
The average sunshine in September is 7.1h.UV index
In Lannilis, France, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Heed the precautions - Suggestions to avoid sunburn are made. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lannilis, France
- Average high temperature in September: 18.6°C
The warmest month (with the highest average high temperature) is July (19.9°C).
The month with the lowest average high temperature is February (9.6°C).
- Average low temperature in September: 12.7°C
The month with the highest average low temperature is August (14.1°C).
The coldest month (with the lowest average low temperature) is February (5.6°C).
Average pressure in September
Lannilis, France
- Average pressure in September: 1018.3mbar
The month with the highest atmospheric pressure is September (1018.3mbar).
The month with the lowest atmospheric pressure is November (1012mbar).
Average wind speed in September
Lannilis, France
- Average wind speed in September: 16.7km/h
The windiest month (with the highest average wind speed) is December (24.1km/h).
The calmest month (with the lowest average wind speed) is July (16km/h).
Average humidity in September
Lannilis, France
- Average humidity in September: 80%
The months with the highest relative humidity are January, June and December (83%).
The months with the lowest relative humidity are April and September (80%).
Average rainfall in September
Lannilis, France
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is November (77mm).
The driest month (with the least rainfall) is September (24mm).
Average rainfall days in September
Lannilis, France
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is December (19.5 days).
The month with the least rainy days is September (12.5 days).
Average snowfall in September
Lannilis, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (6mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Lannilis, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Lannilis, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 7h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in September
Lannilis, France
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is May (14.7 days).
The month with the least sunshine days is November (7.3 days).
Average UV index in September
Lannilis, France
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Lannilis, France
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is April (Cloud cover 43).
Average visibility in September
Lannilis, France
- Average visibility in September: 9km
The months with the highest visibility are March and April (10km).
The months with the lowest visibility are January, February, May, June, July, August, September, October, November and December (9km).
