Weather in Guernsey in September 2018

Expect 18°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Guernsey in September. Check more long-term weather averages for Guernsey in September before you book your next holiday to Guernsey in 2018. The September weather averages shown below are for St Peter Port.

Key weather averages for Guernsey in September

  • 18°C maximum daytime temperature in September in Guernsey (St Peter Port)18
    18°C max day temperature
  • 6 hours of sunshine per day (45% of daylight hours) in September in Guernsey6
    6 hours of sunshine per day
  • 13 days with some rainfall in September in Guernsey (St Peter Port)13
    13 days with some rainfall
  • 13°C minimum night-time temperature in September in Guernsey (St Peter Port)13
    13°C min night temperature
  • 13 hours of daylight per day in September in Guernsey (St Peter Port)13
    13 hours of daylight per day
  • No heat & humidity in September in Guernsey (St Peter Port)0
    No heat & humidity
  • 63 mm monthly rainfall in September in Guernsey (St Peter Port)63
    63 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Guernsey (St Peter Port)4
    4 (Moderate) UV index
  • 17°C sea temperature in September in Guernsey (St Peter Port)17
    17°C sea temperature

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Metric (°C / mm)  |  Imperial (°F / inches)

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Guide to Guernsey weather in September

The average maximum daytime temperature in Guernsey in September is a comfortable 18°C (64°F). The average night-time temperature is usually a cool 13°C (55°F). There are usually 6 hours of bright sunshine each day, which represents 45% of the 13 hours of daylight.

Expect 63mm (2.5 inches) of rainfall across the whole of September with 13 days with some rain falling. Maximum UV levels will be moderate (4 UV index) at midday when the skies are clear.

The average sea temperature in and around Guernsey in September is 17°C (63°F).

The weather in Guernsey in September is represented by St Peter Port.

Guernsey sunrise & sunset times for September 2018

Browse the sunrise & sunset times for Guernsey in September 2018. Select a month to view Guernsey sunrise & sunset times for the next twelve months. The Guernsey sunrise & sunset times shown below are for St Peter Port.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st September 2018 06:26 19:54
Sunday, 2nd September 2018 06:27 19:52
Monday, 3rd September 2018 06:29 19:49
Tuesday, 4th September 2018 06:30 19:47
Wednesday, 5th September 2018 06:32 19:45
Thursday, 6th September 2018 06:33 19:43
Friday, 7th September 2018 06:34 19:41
Saturday, 8th September 2018 06:36 19:39
Sunday, 9th September 2018 06:37 19:37
Monday, 10th September 2018 06:39 19:34
Tuesday, 11th September 2018 06:40 19:32
Wednesday, 12th September 2018 06:42 19:30
Thursday, 13th September 2018 06:43 19:28
Friday, 14th September 2018 06:45 19:26
Saturday, 15th September 2018 06:46 19:24
Sunday, 16th September 2018 06:48 19:21
Monday, 17th September 2018 06:49 19:19
Tuesday, 18th September 2018 06:50 19:17
Wednesday, 19th September 2018 06:52 19:15
Thursday, 20th September 2018 06:53 19:13
Friday, 21st September 2018 06:55 19:11
Saturday, 22nd September 2018 06:56 19:08
Sunday, 23rd September 2018 06:58 19:06
Monday, 24th September 2018 06:59 19:04
Tuesday, 25th September 2018 07:01 19:02
Wednesday, 26th September 2018 07:02 19:00
Thursday, 27th September 2018 07:04 18:58
Friday, 28th September 2018 07:05 18:56
Saturday, 29th September 2018 07:07 18:53
Sunday, 30th September 2018 07:08 18:51
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Check Guernsey weather for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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