Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Stepping into September, Great Gaddesden records an average high-temperature of a refreshing 18.2°C (64.8°F), almost consistent with August. Throughout the month of September, the average temperature in Great Gaddesden dips to a fresh 10.5°C (50.9°F) at night.Humidity
In September, the average relative humidity is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 11.2 days and accumulates 23mm (0.91") of precipitation.Snowfall
May through October are months without snowfall in Great Gaddesden.Daylight
In Great Gaddesden, United Kingdom, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 6:15 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:41 pm BST.
Sunshine
In Great Gaddesden, the average sunshine in September is 6.9h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Great Gaddesden in September?
What is the average humidity in September in Great Gaddesden?
What is the driest month in Great Gaddesden?
How many days does it rain in September in Great Gaddesden?
When it does not snow in Great Gaddesden?
What is the average length of the day in September in Great Gaddesden?
What time are sunrise and sunset in September in Great Gaddesden?
How long on average sun shines in September in Great Gaddesden?
When is the highest UV index in Great Gaddesden?
What is the UV index intensity in September in Great Gaddesden?
Average temperature in September
Great Gaddesden, United Kingdom
- Average high temperature in September: 18.2°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (6.3°C).
- Average low temperature in September: 10.5°C
The month with the highest average low temperature is August (13°C).
The coldest month (with the lowest average low temperature) is January (1.5°C).
Average pressure in September
Great Gaddesden, United Kingdom
- Average pressure in September: 1016.7mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1010.2mbar).
Average wind speed in September
Great Gaddesden, United Kingdom
- Average wind speed in September: 13.3km/h
The windiest months (with the highest average wind speed) are February and December (18.5km/h).
The calmest month (with the lowest average wind speed) is July (13km/h).
Average humidity in September
Great Gaddesden, United Kingdom
- Average humidity in September: 80%
The month with the highest relative humidity is December (91%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
Great Gaddesden, United Kingdom
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is June (50mm).
The driest month (with the least rainfall) is September (23mm).
Average rainfall days in September
Great Gaddesden, United Kingdom
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is June (16.7 days).
The month with the least rainy days is September (11.2 days).
Average snowfall in September
Great Gaddesden, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (36mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Great Gaddesden, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.8 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
Great Gaddesden, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 6h and 5min
The months with the most sunshine are July and August (Average sunshine: 7h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Great Gaddesden, United Kingdom
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Great Gaddesden, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Great Gaddesden, United Kingdom
- Average cloud cover in September: 50
The month with the most cloud cover is November (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 50).
Average visibility in September
Great Gaddesden, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
Great Gaddesden, United Kingdom
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