September weather forecast and climate
Colchester, United Kingdom

Weather in September

September, the first month of the autumn, in Colchester, is still a comfortable month, with average temperature fluctuating between 18.5°C (65.3°F) and 12.5°C (54.5°F).

Temperature

In Colchester, the average high-temperature in September is almost the same as in August - a comfortable 18.5°C (65.3°F). In September, the average low-temperature is 12.5°C (54.5°F).

Humidity

In September, the average relative humidity is 77%.

Rainfall

In Colchester, in September, it is raining for 12.9 days, with typically 31mm (1.22") of accumulated precipitation. In Colchester, during the entire year, the rain falls for 182 days and collects up to 445mm (17.52") of precipitation.

Snowfall

April through October are months without snowfall in Colchester.

Daylight

In September, the average length of the day in Colchester, United Kingdom, is 12.6h.

Sunshine

In Colchester, the average sunshine in September is 7.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Colchester?

In September, the average relative humidity in Colchester, United Kingdom, is 77%.

How much does it rain in Colchester in September?

In Colchester, in September, it is raining for 12.9 days, with typically 31mm (1.22") of accumulated precipitation.

When it does not snow in Colchester?

April through October are months without snowfall in Colchester, United Kingdom.

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

In September, the average length of the day is 12.6h.

How many hours of sunshine does Colchester have in September?

In September, the average sunshine in Colchester, United Kingdom, is 7.7h.

What is the UV index intensity in September in Colchester?

In Colchester, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in September
Colchester, United Kingdom

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

The warmest month (with the highest average high temperature) is August (21.2°C).
The month with the lowest average high temperature is January (6.4°C).

  • Average low temperature in September: 12.5°C

The month with the highest average low temperature is August (14.5°C).
The coldest month (with the lowest average low temperature) is January (2.9°C).

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Average pressure in September
Colchester, United Kingdom

Average pressure in September - Colchester, United Kingdom
  • Average pressure in September: 1016.8mbar

The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).

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Average wind speed in September
Colchester, United Kingdom

Average wind speed in September - Colchester, United Kingdom
  • Average wind speed in September: 15.3km/h

The windiest month (with the highest average wind speed) is December (21km/h).
The calmest month (with the lowest average wind speed) is July (14.1km/h).

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Average humidity in September
Colchester, United Kingdom

Average humidity in September - Colchester, United Kingdom
  • Average humidity in September: 77%

Months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is August (75%).

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Average rainfall in September
Colchester, United Kingdom

Average rainfall in September - Colchester, United Kingdom
  • Average rainfall in September: 31mm

The wettest month (with the highest rainfall) is July (54mm).
The driest month (with the least rainfall) is April (18mm).

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Average rainfall days in September
Colchester, United Kingdom

Average rainfall days in September - Colchester, United Kingdom
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is February (11.8 days).

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Average snowfall in September
Colchester, United Kingdom

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

The month with the highest snowfall is February (16mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Colchester, United Kingdom

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

The month with the highest number of snowfall days is February (3.7 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Colchester, United Kingdom
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.6h).
The month with the shortest days is December (Average daylight: 7.9h).

  • Average sunshine in September: 7.7h

The month with the most sunshine is August (Average sunshine: 8.6h).
The month with the least sunshine is February (Average sunshine: 3.8h).

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Average sunshine days in September
Colchester, United Kingdom

Average sunshine days in September - Colchester, United Kingdom
  • Average sunshine days in September: 13.2 days

The month with the most sunshine days is March (14.3 days).
The month with the least sunshine days is July (7.9 days).

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Average UV index in September
Colchester, United Kingdom

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

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Colchester, United Kingdom

Average cloud cover in September - Colchester, United Kingdom
  • Average cloud cover in September: 44

The month with the most cloud cover is February (Cloud cover 61).
Months with the least cloud cover are August and September (Cloud cover 44).

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Average visibility in September
Colchester, United Kingdom

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

The month with the highest visibility is August (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (9km).

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