September weather forecast
Grasmere, United Kingdom

Weather in September

The first month of the autumn, September, is still a mild month in Grasmere, United Kingdom, with an average temperature varying between 14°C (57.2°F) and 9.3°C (48.7°F).

Temperature

In September, the average high-temperature is practically the same as in August - a still mild 14°C (57.2°F). The average low-temperature, in Grasmere, is 9.3°C (48.7°F).

Humidity

The average relative humidity in September in Grasmere is 89%.

Rainfall

In Grasmere, it is raining for 15.7 days, with typically 60mm (2.36") of accumulated precipitation. 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 in Grasmere.

Daylight

The average length of the day in September in Grasmere is 12h and 42min.
On the first day of the month, sunrise is at 6:19 am and sunset at 8:04 pm. On the last day of September, in Grasmere, sunrise is at 7:12 am and sunset at 6:51 pm BST.

Sunshine

In Grasmere, the average sunshine in September is 5.3h.

UV index

The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 3 in September transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Grasmere?

In Grasmere, the average relative humidity in September is 89%.

How many days does it rain in September in Grasmere?

In Grasmere, during September, the rain falls for 15.7 days and regularly aggregates up to 60mm (2.36") of precipitation.

When it does not snow in Grasmere?

In Grasmere, snow does not fall in July through September.

Does it snow in Grasmere in September?

In Grasmere, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Grasmere?

The average day length in September is 12h and 42min.

What time are sunrise and sunset in September in Grasmere?

In September, on the first day of the month, sunrise is at 6:19 am and sunset at 8:04 pm. On the last day of the month, in Grasmere, sunrise is at 7:12 am and sunset at 6:51 pm BST.

How long on average sun shines in September in Grasmere?

The average sunshine duration in September in Grasmere is 5.3h.

What is the UV index reading in September in Grasmere?

In September, the average daily maximum UV index in Grasmere, United Kingdom, is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.

Average temperature in September
Grasmere, United Kingdom

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).

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Average pressure in September
Grasmere, United Kingdom

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).

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Average wind speed in September
Grasmere, United Kingdom

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).

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Average humidity in September
Grasmere, United Kingdom

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%).

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Average rainfall in September
Grasmere, United Kingdom

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).

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Average rainfall days in September
Grasmere, United Kingdom

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).

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Average snowfall in September
Grasmere, United Kingdom

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).

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Average snowfall days in September
Grasmere, United Kingdom

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).

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Average daylight in September /
Average sunshine in September
Grasmere, United Kingdom

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 9min).
The month with the shortest days is December (Average daylight: 7h and 24min).

  • Average sunshine in September: 5.3h

The month with the most sunshine is April (Average sunshine: 6.7h).
The month with the least sunshine is December (Average sunshine: 2.7h).

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Average sunshine days in September
Grasmere, United Kingdom

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).

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Average UV index in September
Grasmere, United Kingdom

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).

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Average cloud cover in September
Grasmere, United Kingdom

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).

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Average visibility in September
Grasmere, United Kingdom

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).

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