Weather in Guernsey, Channel Islands in September

So you're interested in going to Guernsey, Channel Islands in September

September is a slightly cold and slightly rainy time for sunbathing in Guernsey. September is a little too cold to enjoy swimming in Guernsey for any length of time. Consider visiting Guernsey in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for September.

Temperature in Guernsey in September

The average maximum temperature in Guernsey in September is 18°. The average maximum temperature is 19° in the previous month and 15° in the next month.

The average temperature in Guernsey in September is 16°. The average temperature ranges is 17° in the previous month and 13° in the next month.

The average minimum temperature in Guernsey in September is 13°. The minimum temperature is 14° in the previous month and 12° in the next month.

Sunshine in Guernsey in September

The average day light hours per day in Guernsey in September are 12.6 and there are 6.1 hours of sunshine per day on average during September making it a quite sunny month with some cloud cover.

The ultraviolet index in Guernsey in September is typically 4.5 during September. An ultraviolet index reading of 3 to 5 indicates there is a moderate risk of harm from unprotected sun exposure. Keep out of the sun during the strongest hours around midday when unprotected skin risks burning in less than 30 minutes. For the sensitive wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating. Tanning for hours is possible with the right application of sun cream. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Guernsey in September

The average sea water temperature in Guernsey in September is 18.4° which is cool for swimming, shorty wetsuit may help you extend your time in the water.

Rainfall in Guernsey in September

The average total rainfall in Guernsey in September is 0.9cm and on average there are 13 rainy days in September making it a slightly wet time to visit the beach.

Humidity in Guernsey in September

The maximum dew point (an indicator of humidity) in Guernsey in September is 15° which is comfortable for everyone. The dew point is 16° in the previous month and 13° in the next month.

The average maximum relative humidity in Guernsey in September is typically 95.4%. The maximum relative humidity is 96.7% in the previous month and 94.2% in the next month.

The average relative humidity in Guernsey in September is typically 84%. The average relative humidity is 84.6% in the previous month and 84.7% in the next month.

Wind Speed in Guernsey in September

The average maximum wind speed in Guernsey in September is typically 27kmh. The average maximum wind speed is 27kmh in the previous month and 31kmh in the next month.

The average wind speed in Guernsey in September is typically 18kmh. The average wind speed is 18kmh in the previous month and 21kmh in the next month.

The average wind direction in Guernsey in September is from the West.