Grindavík Weather in September

What's the weather like in Grindavík (Southern Peninsula) in September 2021?

The climate in Grindavík during September can be summarized as cool and a little damp.

September is in the fall / autumn in Grindavík and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 10°C (49°F), whilst at night 5°C (41°F) is normal.

Grindavík weather averages (imperial / metric)
Daytime temperature 9.7°C 49.4°F
Nightly temperature 5°C 40.9°F
Average temperature 7.3°C 45.1°F
Daily sunshine 4.1 hrs
Avg rainfall 97 mm 3.8 ins
Rainy days 18 days
Sea temperature 10.9°C 51.5°F
Humidity 81%
Windspeed 20.5kph 13 mph

On average September is the 6th driest month of the year in Grindavík with around 97mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.

On the flip side this corresponds to an average of 4.1 hours of sunshine per day.

September temperatures in Grindavík

Grindavík average temperature in September

September rainfall

Grindavík average rain in September

September hourly sunshine

Grindavík average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Grindavík in September 2021.

Other monthly averages

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Grindavík weather stats

Grindavík weather statistics
Hottest month: July 12.8°C 55°F
Driest month: July 67mm 2.6ins
Sunniest month: May 3hrs
Coldest month: January 1.7°C 35.1°F
Wettest month: October 124mm 4.9ins
Map showing location of Grindavík (63.8424, -22.43375)

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