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
In Geysir, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's fresh 10.4°C (50.7°F) to a frosty 6.8°C (44.2°F). Geysir records a slight downturn to an average an icy 2.4°C (36.3°F) during the nights of September.Humidity
In Geysir, the average relative humidity in September is 87%.Rainfall
In September, in Geysir, the rain falls for 21.9 days. Throughout September, 129mm (5.08") of precipitation is accumulated. Throughout the year, in Geysir, Iceland, there are 201.7 rainfall days, and 1100mm (43.31") of precipitation is accumulated.Snowfall
Months with snowfall in Geysir are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 1.3 snowfall days, it receives 18mm (0.71") of snow. In Geysir, during the entire year, snow falls for 98.9 days and aggregates up to 1660mm (65.35") of snow.Daylight
In September, the average length of the day is 13h and 1min.On the first day of September, sunrise is at 06:05 and sunset at 20:37. On the last day of the month, sunrise is at 07:29 and sunset at 18:52 GMT.
Sunshine
The average sunshine in September in Geysir is 4.5h.UV index
In Geysir, Iceland, the average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: The UV index of 2 in September translates into these instructions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
How cold is it in Geysir in September?
What is the average humidity in September in Geysir?
How many days does it rain in September in Geysir?
When does it start snowing in Geysir?
How many hours of daylight does Geysir have in September?
What time are sunrise and sunset in September in Geysir?
How many hours of sunshine does Geysir have in September?
What is the UV index reading in September in Geysir?
Average temperature in September
Geysir, Iceland
- Average high temperature in September: 6.8°C
The warmest month (with the highest average high temperature) is July (11.3°C).
The month with the lowest average high temperature is December (-2.6°C).
- Average low temperature in September: 2.4°C
The month with the highest average low temperature is July (5.9°C).
The coldest month (with the lowest average low temperature) is December (-7.6°C).
Average pressure in September
Geysir, Iceland
- Average pressure in September: 1003.1mbar
The month with the highest atmospheric pressure is June (1013.9mbar).
The month with the lowest atmospheric pressure is January (997.4mbar).
Average wind speed in September
Geysir, Iceland
- Average wind speed in September: 15.5km/h
The windiest month (with the highest average wind speed) is February (19.9km/h).
The calmest month (with the lowest average wind speed) is June (11.8km/h).
Average humidity in September
Geysir, Iceland
- Average humidity in September: 87%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is June (78%).
Average rainfall in September
Geysir, Iceland
- Average rainfall in September: 129mm
The wettest month (with the highest rainfall) is January (141mm).
The driest month (with the least rainfall) is June (41mm).
Average rainfall days in September
Geysir, Iceland
- Average rainfall days in September: 21.9 days
The month with the highest number of rainy days is September (21.9 days).
The month with the least rainy days is February (12.2 days).
Average snowfall in September
Geysir, Iceland
- Average snowfall in September: 18mm
The month with the highest snowfall is January (393mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Geysir, Iceland
- Average snowfall days in September: 1.3 days
The month with the highest number of snowfall days is March (17.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Geysir, Iceland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 0min).
The month with the shortest days is December (Average daylight: 4h and 18min).
- Average sunshine in September: 4h and 3min
The month with the most sunshine is August (Average sunshine: 8h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Geysir, Iceland
- Average sunshine days in September: 5.3 days
The month with the most sunshine days is June (10.5 days).
The month with the least sunshine days is September (5.3 days).
Average UV index in September
Geysir, Iceland
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 3).
The months with the lowest UV index are October and November (UV index 1).
Average cloud cover in September
Geysir, Iceland
- Average cloud cover in September: 66
The month with the most cloud cover is September (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 57).
Average visibility in September
Geysir, Iceland
- Average visibility in September: 8km
The months with the highest visibility are May, June, July and August (9km).
The month with the lowest visibility is January (7km).
Geysir, Iceland
Weather forecast for your location
2. Allow the app to use your location
