Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a fresh 10°C (50°F) in August to a chilly 6.8°C (44.2°F). Grenivík's average nighttime temperature in September modestly descends to an icy 2°C (35.6°F).Humidity
In September, the average relative humidity is 86%.Rainfall
In Grenivík, in September, it is raining for 21.9 days, with typically 97mm (3.82") of accumulated precipitation. Throughout the year, there are 178 rainfall days, and 899mm (35.39") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Grenivík, Iceland. September is the first month it typically snows. Throughout September, in the average 2.4 snowfall days, it receives 64mm (2.52") of snow. Throughout the year, there are 122.7 snowfall days, and 2568mm (101.1") of snow is accumulated.Daylight
The average length of the day in September in Grenivík is 13h and 5min.On the first day of September in Grenivík, sunrise is at 05:50 and sunset at 20:34. On the last day of the month, sunrise is at 07:22 and sunset at 18:42 GMT.
Sunshine
The average sunshine in September is 4.7h.UV index
April through September, with an average maximum UV index of 2, are months with the highest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the UV index of 2 transforms into the following advice:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
Is September cold in Grenivík?
What is the average humidity in September in Grenivík?
How many days does it rain in September in Grenivík?
When does it start to snow in Grenivík?
What is the average length of the day in September in Grenivík?
What time are sunrise and sunset in September in Grenivík?
How many hours of sunshine does Grenivík have in September?
What are the months with the highest UV index in Grenivík?
What is the UV index reading in September in Grenivík?
Average temperature in September
Grenivík, Iceland
- Average high temperature in September: 6.8°C
The warmest month (with the highest average high temperature) is July (11.1°C).
The month with the lowest average high temperature is December (-3.8°C).
- Average low temperature in September: 2°C
The month with the highest average low temperature is July (5.6°C).
The coldest month (with the lowest average low temperature) is December (-9.1°C).
Average pressure in September
Grenivík, Iceland
- Average pressure in September: 1003.5mbar
The month with the highest atmospheric pressure is June (1014.3mbar).
The month with the lowest atmospheric pressure is January (998.5mbar).
Average wind speed in September
Grenivík, Iceland
- Average wind speed in September: 12.9km/h
The windiest month (with the highest average wind speed) is December (16.3km/h).
The calmest month (with the lowest average wind speed) is July (9.9km/h).
Average humidity in September
Grenivík, Iceland
- Average humidity in September: 86%
The months with the highest relative humidity are January, February, March and December (91%).
The month with the lowest relative humidity is June (77%).
Average rainfall in September
Grenivík, Iceland
- Average rainfall in September: 97mm
The wettest month (with the highest rainfall) is December (115mm).
The driest month (with the least rainfall) is June (40mm).
Average rainfall days in September
Grenivík, Iceland
- Average rainfall days in September: 21.9 days
The months with the highest number of rainy days are July and August (22.3 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in September
Grenivík, Iceland
- Average snowfall in September: 64mm
The month with the highest snowfall is December (511mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Grenivík, Iceland
- Average snowfall days in September: 2.4 days
The month with the highest number of snowfall days is March (20.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Grenivík, Iceland
- Average daylight in September: 13h and 1min
The month with the longest days is July (Average daylight: 20h and 48min).
The month with the shortest days is December (Average daylight: 3h and 12min).
- Average sunshine in September: 4h and 4min
The month with the most sunshine is May (Average sunshine: 6h and 42min).
The month with the least sunshine is June (Average sunshine: 1h and 6min).
Average sunshine days in September
Grenivík, Iceland
- Average sunshine days in September: 5.3 days
The month with the most sunshine days is May (8.9 days).
The month with the least sunshine days is September (5.3 days).
Average UV index in September
Grenivík, Iceland
- Average UV index in September: 2
The months with the highest UV index are April, May, June, July, August and September (UV index 2).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Grenivík, Iceland
- Average cloud cover in September: 66
The month with the most cloud cover is March (Cloud cover 72).
The month with the least cloud cover is June (Cloud cover 62).
Average visibility in September
Grenivík, Iceland
- Average visibility in September: 8km
The month with the highest visibility is June (9km).
The months with the lowest visibility are January, February, March, April, November and December (7km).
Grenivík, Iceland
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