September weather forecast
Harston, United Kingdom

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Weather in September

September, the first month of the autumn in Harston, is also an enjoyable month, with an average temperature fluctuating between 11.5°C (52.7°F) and 18.5°C (65.3°F).

Temperature

September's advent denotes a minor fluctuation in the average high-temperature to a comfortable 18.5°C (65.3°F) from August's 21.3°C (70.3°F). In the month of September, the average low-temperature usually rests at a cool 11.5°C (52.7°F).

Humidity

In Harston, the average relative humidity in September is 78%.

Rainfall

In September, the rain falls for 11.5 days. Throughout September, 22mm (0.87") of precipitation is accumulated. In Harston, during the entire year, the rain falls for 173.6 days and collects up to 381mm (15") of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In September, the average length of the day is 12h and 39min.
On the first day of September, sunrise is at 6:12 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:39 pm BST.

Sunshine

In Harston, the average sunshine in September is 7.1h.

UV index

In Harston, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 4 during September translates into these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Experience reduced UV exposure by about half when donning a wide-brim hat.

Frequently asked questions

What are September temperatures in Harston?

In September, the average high-temperature and low-temperature are 18.5°C (65.3°F) and 11.5°C (52.7°F) respectively.

What is the average humidity in September in Harston?

In Harston, United Kingdom, the average relative humidity in September is 78%.

How many days does it rain in September in Harston?

In Harston, United Kingdom, in September, during 11.5 rainfall days, 22mm (0.87") of precipitation is typically accumulated.

When it does not snow in Harston?

April through October are months without snowfall in Harston.

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

In September, the average day length in Harston is 12h and 39min.

When are sunrise and sunset in September in Harston?

In September, on the first day of the month, sunrise is at 6:12 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:39 pm BST.

How many hours of sunshine does Harston have in September?

The average sunshine duration in September in Harston, United Kingdom, is 7.1h.

What is the UV index reading in September in Harston?

The average daily maximum UV index in September in Harston is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Harston, United Kingdom

Average temperature in September - Harston, United Kingdom
  • Average high temperature in September: 18.5°C

The warmest months (with the highest average high temperature) are July and August (21.3°C).
The month with the lowest average high temperature is January (5.9°C).

  • Average low temperature in September: 11.5°C

The month with the highest average low temperature is August (13.5°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).

Average pressure in September
Harston, United Kingdom

Average pressure in September - Harston, United Kingdom
  • Average pressure in September: 1016.5mbar

The month with the highest atmospheric pressure is May (1016.6mbar).
The month with the lowest atmospheric pressure is November (1010.2mbar).

Average wind speed in September
Harston, United Kingdom

Average wind speed in September - Harston, United Kingdom
  • Average wind speed in September: 13.4km/h

The windiest month (with the highest average wind speed) is December (18.5km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).

Average humidity in September
Harston, United Kingdom

Average humidity in September - Harston, United Kingdom
  • Average humidity in September: 78%

The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (75%).

Average rainfall in September
Harston, United Kingdom

Average rainfall in September - Harston, United Kingdom
  • Average rainfall in September: 22mm

The wettest month (with the highest rainfall) is June (48mm).
The driest month (with the least rainfall) is April (20mm).

Average rainfall days in September
Harston, United Kingdom

Average rainfall days in September - Harston, United Kingdom
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is September (11.5 days).

Average snowfall in September
Harston, United Kingdom

Average snowfall in September - Harston, United Kingdom
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (23mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in September
Harston, United Kingdom

Average snowfall days in September - Harston, United Kingdom
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.3 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
Harston, United Kingdom

Average daylight in September / Average sunshine in September - Harston, United Kingdom
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).

  • Average sunshine in September: 7h and 1min

The month with the most sunshine is August (Average sunshine: 8h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).

Average sunshine days in September
Harston, United Kingdom

Average sunshine days in September - Harston, United Kingdom
  • Average sunshine days in September: 15 days

The month with the most sunshine days is October (15.5 days).
The month with the least sunshine days is June (8.1 days).

Average UV index in September
Harston, United Kingdom

Average UV index in September - Harston, United Kingdom
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Harston, United Kingdom

Average cloud cover in September - Harston, United Kingdom
  • Average cloud cover in September: 48

The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 48).

Average visibility in September
Harston, United Kingdom

Average visibility in September - Harston, United Kingdom
  • Average visibility in September: 9km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).

Harston, United Kingdom

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