September weather forecastGrasmere, United Kingdom
September
Weather in September
September, the first month of the autumn in Grasmere, is also a moderate month, with an average temperature ranging between min 9.3°C (48.7°F) and max 14°C (57.2°F).Temperature
September's presence records an average high-temperature of a still mild 14°C (57.2°F), closely mirroring August's climate. In Grasmere, September nights experience a modest descent in temperature from daily peaks, cooling down to an average of 9.3°C (48.7°F).Humidity
In September, the average relative humidity is 89%.Rainfall
In September, the rain falls for 15.7 days. Throughout September, 60mm (2.36") of precipitation is accumulated. In Grasmere, during the entire year, the rain falls for 202 days and collects up to 866mm (34.09") of precipitation.Snowfall
July through September are months without snowfall.Daylight
The average length of the day in September is 12h and 42min.On the first day of September, sunrise is at 6:20 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:50 pm BST.
Sunshine
The average sunshine in September in Grasmere is 5.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. 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
Grasmere, United Kingdom
- Average high temperature in September: 14°C
The warmest month (with the highest average high temperature) is July (16°C).
The month with the lowest average high temperature is January (4.9°C).
- Average low temperature in September: 9.3°C
The month with the highest average low temperature is August (10.7°C).
The coldest month (with the lowest average low temperature) is February (1.2°C).
Average pressure in September
Grasmere, United Kingdom
- Average pressure in September: 1014.7mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.1mbar).
Average wind speed in September
Grasmere, United Kingdom
- Average wind speed in September: 15.9km/h
The windiest month (with the highest average wind speed) is December (21.7km/h).
The calmest month (with the lowest average wind speed) is June (12.8km/h).
Average humidity in September
Grasmere, United Kingdom
- Average humidity in September: 89%
The months with the highest relative humidity are January and December (90%).
The month with the lowest relative humidity is April (84%).
Average rainfall in September
Grasmere, United Kingdom
- Average rainfall in September: 60mm
The wettest month (with the highest rainfall) is December (95mm).
The driest month (with the least rainfall) is April (37mm).
Average rainfall days in September
Grasmere, United Kingdom
- Average rainfall days in September: 15.7 days
The month with the highest number of rainy days is August (20.8 days).
The month with the least rainy days is February (10.8 days).
Average snowfall in September
Grasmere, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (174mm).
The months with the least snowfall are July, August and September (0mm).
Average snowfall days in September
Grasmere, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grasmere, United Kingdom
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 12min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in September: 5h and 18min
The month with the most sunshine is April (Average sunshine: 6h and 42min).
The month with the least sunshine is December (Average sunshine: 2h and 42min).
Average sunshine days in September
Grasmere, United Kingdom
- Average sunshine days in September: 11.8 days
The month with the most sunshine days is April (12.5 days).
The months with the least sunshine days are November and December (7.9 days).
Average UV index in September
Grasmere, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May and June (UV index 4).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Grasmere, United Kingdom
- Average cloud cover in September: 64
The months with the most cloud cover are January and December (Cloud cover 72).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in September
Grasmere, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (9km).
The months with the lowest visibility are January and July (8km).
