October weather forecastGrindavik, Iceland
October
Weather in October
Grindavik experiences a clear shift towards colder weather in October, with the temperature plunging to lows of 5.4°C (41.7°F). This period signals the onset of the winter season, with increased rainfall and the reappearance of snowfall after a long hiatus. Long walks along the coastal trails provide breathtaking views of the colourful autumn leaves against a snowy backdrop. Despite the dropping temperatures, October is an excellent time for sighting the Northern Lights. Coupled with the opportunity to soak in Grindavik's geothermal pools, the cold temperatures and stunning vistas make for a unique autumn experience.Temperature
During October, Grindavik records an average high-temperature of a frosty 7.6°C (45.7°F), marking a slight divergence from September's 10.3°C (50.5°F). Grindavik's nighttime temperature in October shows a minor descent, with a steady average of 5.4°C (41.7°F).Humidity
In October, the average relative humidity is 78%.Rainfall
In Grindavik, during October, the rain falls for 19.2 days and regularly aggregates up to 83mm (3.27") of precipitation. In Grindavik, during the entire year, the rain falls for 193.9 days and collects up to 833mm (32.8") of precipitation.Snowfall
Months with snowfall in Grindavik are January through May, October through December. October is the first month it typically snows in Grindavik. Throughout October, in the average 0.5 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, there are 33.4 snowfall days, and 297mm (11.69") of snow is accumulated.Sea temperature
In Grindavik, the average seawater temperature in October is 8.5°C (47.3°F).Note: Danger awaits those who swim in 8.5°C (47.3°F) without protection. Falling below 10°C (50°F) means intense cold shock and hyperventilation.
Daylight
In October, the average length of the day is 9h and 46min.On the first day of October, sunrise is at 07:40 and sunset at 18:58. On the last day of the month, sunrise is at 09:09 and sunset at 17:16 GMT.
Sunshine
In October, the average sunshine in Grindavik, Iceland, is 4.2h.UV index
January through May, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 2 in October translates into this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Experience reduced UV exposure by about half when donning a wide-brim hat. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Grindavik, Iceland
- Average high temperature in October: 7.6°C
The warmest months (with the highest average high temperature) are July and August (12.2°C).
The months with the lowest average high temperature are February, March and December (4.2°C).
- Average low temperature in October: 5.4°C
The month with the highest average low temperature is July (9.9°C).
The coldest months (with the lowest average low temperature) are March and December (1.3°C).
Average pressure in October
Grindavik, Iceland
- Average pressure in October: 1003.3mbar
The month with the highest atmospheric pressure is June (1013.7mbar).
The month with the lowest atmospheric pressure is January (996.1mbar).
Average wind speed in October
Grindavik, Iceland
- Average wind speed in October: 30.2km/h
The windiest month (with the highest average wind speed) is February (35km/h).
The calmest month (with the lowest average wind speed) is June (20.1km/h).
Average humidity in October
Grindavik, Iceland
- Average humidity in October: 78%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is December (74%).
Average rainfall in October
Grindavik, Iceland
- Average rainfall in October: 83mm
The wettest month (with the highest rainfall) is January (99mm).
The driest month (with the least rainfall) is June (35mm).
Average rainfall days in October
Grindavik, Iceland
- Average rainfall days in October: 19.2 days
The month with the highest number of rainy days is September (19.9 days).
The month with the least rainy days is June (12.5 days).
Average snowfall in October
Grindavik, Iceland
- Average snowfall in October: 2mm
The month with the highest snowfall is March (75mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in October
Grindavik, Iceland
- Average snowfall days in October: 0.5 days
The month with the highest number of snowfall days is March (8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in October
Grindavik, Iceland
- Average sea temperature in October: 8.5°C
The best month for swimming (with the highest average sea temperature) is July (11.7°C).
The coldest month (with the lowest average sea temperature) is March (5.8°C).
Average daylight in October /
Average sunshine in October
Grindavik, Iceland
- Average daylight in October: 9h and 48min
The month with the longest days is June (Average daylight: 20h and 36min).
The month with the shortest days is December (Average daylight: 4h and 30min).
- Average sunshine in October: 4h and 12min
The month with the most sunshine is August (Average sunshine: 7h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in October
Grindavik, Iceland
- Average sunshine days in October: 10 days
The month with the most sunshine days is June (15 days).
The months with the least sunshine days are March and April (7.1 days).
Average UV index in October
Grindavik, Iceland
- Average UV index in October: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 2).
Average cloud cover in October
Grindavik, Iceland
- Average cloud cover in October: 64
The month with the most cloud cover is March (Cloud cover 69).
The months with the least cloud cover are May, July and August (Cloud cover 60).
Average visibility in October
Grindavik, Iceland
- Average visibility in October: 9km
The months with the highest visibility are June and August (10km).
The months with the lowest visibility are January, February, March, April, May, July, September, October, November and December (9km).
