September weather forecastHesteyri, Iceland
September
Weather in September
September, the first month of the autumn in Hesteyri, is still a chilly month, with an average temperature ranging between min 4.7°C (40.5°F) and max 7.2°C (45°F).Temperature
Hesteyri records a slight change with September's average high-temperatures adjusting to a still chilly 7.2°C (45°F) from August's 9.3°C (48.7°F). Hesteyri, in the month of September, notes an average low temperature of 4.7°C (40.5°F), indicating a small decrease from the daytime highs.Humidity
January, February, August through October, with an average relative humidity of 85%, are the most humid months.Rainfall
In September, in Hesteyri, the rain falls for 21.7 days. Throughout September, 75mm (2.95") of precipitation is accumulated. Throughout the year, there are 169 rainfall days, and 830mm (32.68") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.7 snowfall days, it receives 12mm (0.47") of snow. In Hesteyri, during the entire year, snow falls for 95.9 days and aggregates up to 999mm (39.33") of snow.Daylight
In September, the average length of the day is 13h and 7min.On the first day of the month, sunrise is at 06:07 and sunset at 20:54. On the last day of September, sunrise is at 07:41 and sunset at 19:01 GMT.
Sunshine
In September, the average sunshine is 4h.UV index
In September, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 2 in September interprets into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hesteyri, Iceland
- Average high temperature in September: 7.2°C
The warmest month (with the highest average high temperature) is July (9.5°C).
The month with the lowest average high temperature is March (-0.2°C).
- Average low temperature in September: 4.7°C
The month with the highest average low temperature is July (6.8°C).
The coldest month (with the lowest average low temperature) is March (-3°C).
Average pressure in September
Hesteyri, Iceland
- Average pressure in September: 1003.4mbar
The month with the highest atmospheric pressure is June (1014.8mbar).
The month with the lowest atmospheric pressure is January (997.4mbar).
Average wind speed in September
Hesteyri, Iceland
- Average wind speed in September: 20.2km/h
The windiest month (with the highest average wind speed) is December (29.6km/h).
The calmest month (with the lowest average wind speed) is June (15.7km/h).
Average humidity in September
Hesteyri, Iceland
- Average humidity in September: 85%
The months with the highest relative humidity are January, February, August, September and October (85%).
The months with the lowest relative humidity are May and June (82%).
Average rainfall in September
Hesteyri, Iceland
- Average rainfall in September: 75mm
The wettest month (with the highest rainfall) is January (101mm).
The driest month (with the least rainfall) is June (34mm).
Average rainfall days in September
Hesteyri, Iceland
- Average rainfall days in September: 21.7 days
The month with the highest number of rainy days is September (21.7 days).
The month with the least rainy days is February (8.5 days).
Average snowfall in September
Hesteyri, Iceland
- Average snowfall in September: 12mm
The month with the highest snowfall is March (203mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Hesteyri, Iceland
- Average snowfall days in September: 1.7 days
The month with the highest number of snowfall days is March (18 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Hesteyri, Iceland
- Average daylight in September: 13h and 6min
The month with the longest days is May (Average daylight: 19h and 36min).
The month with the shortest days is December (Average daylight: 2h and 54min).
- Average sunshine in September: 4h and 0min
The month with the most sunshine is August (Average sunshine: 6h and 30min).
The month with the least sunshine is June (Average sunshine: 0h and 24min).
Average sunshine days in September
Hesteyri, Iceland
- Average sunshine days in September: 5.9 days
The month with the most sunshine days is June (13.9 days).
The month with the least sunshine days is March (3.5 days).
Average UV index in September
Hesteyri, 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 January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Hesteyri, Iceland
- Average cloud cover in September: 70
The month with the most cloud cover is March (Cloud cover 79).
The month with the least cloud cover is June (Cloud cover 61).
Average visibility in September
Hesteyri, Iceland
- Average visibility in September: 9km
The months with the highest visibility are May, June, July, August and September (9km).
The month with the lowest visibility is March (7km).
