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
September
Weather in September
Temperature
As August transitions into September, the average high-temperature in Blönduós rests at a frosty 8.3°C (46.9°F), maintaining a close resemblance to the previous month. Blönduós's nocturnal average in September closely mirrors its daytime temperatures, settling at a cold 4.4°C (39.9°F).Humidity
In Blönduós, the average relative humidity in September is 82%.Rainfall
September is the month with the most rainfall. Rain falls for 14.3 days and accumulates 43mm (1.69") of precipitation.Snowfall
January through June, September through December are months with snowfall in Blönduós. September is the first month it typically snows in Blönduós. Throughout September, in the average 2 snowfall days, it receives 22mm (0.87") of snow. Throughout the year, there are 68.5 snowfall days, and 512mm (20.16") of snow is accumulated.Daylight
In September, the average length of the day is 13h and 5min.On the first day of September in Blönduós, sunrise is at 06:00 and sunset at 20:41. On the last day of the month, sunrise is at 07:30 and sunset at 18:51 GMT.
Sunshine
In Blönduós, the average sunshine in September is 4.9h.UV index
In Blönduós, the average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 2 in September transforms into the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Blönduós?
What is the average humidity in September in Blönduós?
What is the wettest month in Blönduós?
How much does it rain in Blönduós in September?
When does it start to snow in Blönduós?
What is the average length of the day in September in Blönduós?
What time are sunrise and sunset in September in Blönduós?
How long on average sun shines in September in Blönduós?
What is the UV index reading in September in Blönduós?
Average temperature in September
Blönduós, Iceland
- Average high temperature in September: 8.3°C
The warmest month (with the highest average high temperature) is July (11.8°C).
The month with the lowest average high temperature is December (-0.5°C).
- Average low temperature in September: 4.4°C
The month with the highest average low temperature is July (7.4°C).
The coldest month (with the lowest average low temperature) is December (-4°C).
Average pressure in September
Blönduós, Iceland
- Average pressure in September: 1003.5mbar
The month with the highest atmospheric pressure is June (1014.4mbar).
The month with the lowest atmospheric pressure is January (998mbar).
Average wind speed in September
Blönduós, Iceland
- Average wind speed in September: 17.3km/h
The windiest month (with the highest average wind speed) is December (22km/h).
The calmest month (with the lowest average wind speed) is July (13.9km/h).
Average humidity in September
Blönduós, Iceland
- Average humidity in September: 82%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are May and June (75%).
Average rainfall in September
Blönduós, Iceland
- Average rainfall in September: 43mm
The wettest month (with the highest rainfall) is September (43mm).
The driest month (with the least rainfall) is June (15mm).
Average rainfall days in September
Blönduós, Iceland
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is September (14.3 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in September
Blönduós, Iceland
- Average snowfall in September: 22mm
The month with the highest snowfall is January (106mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Blönduós, Iceland
- Average snowfall days in September: 2 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are July and August (0.1 days).
Average daylight in September /
Average sunshine in September
Blönduós, Iceland
- Average daylight in September: 13h and 1min
The month with the longest days is June (Average daylight: 22h and 42min).
The month with the shortest days is December (Average daylight: 3h and 24min).
- Average sunshine in September: 4h and 5min
The month with the most sunshine is May (Average sunshine: 8h and 0min).
The month with the least sunshine is June (Average sunshine: 0h and 42min).
Average sunshine days in September
Blönduós, Iceland
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is June (15.8 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in September
Blönduós, Iceland
- Average UV index in September: 2
The months with the highest UV index are May, June and July (UV index 3).
The months with the lowest UV index are March, October, November and December (UV index 1).
Average cloud cover in September
Blönduós, Iceland
- Average cloud cover in September: 64
The month with the most cloud cover is March (Cloud cover 67).
The month with the least cloud cover is June (Cloud cover 55).
Average visibility in September
Blönduós, Iceland
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
