Annual mean 5°C · wettest around February · prevailing wind E
Warmest
13.6 °C
Coldest
-1.7 °C
Wettest
46%
Windiest
7.9 m/s
Prevailing
E
6.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Selfoss over the whole year is 5°C. July is the hottest month, with highs of about 13°C; December is the coldest, with lows of about -0°C. The rainy (wet) season in Selfoss runs from September to March, peaking in February with a 48% chance of rain on a given day. The dry season is April to August; July is the driest month, at 21%. Winds in Selfoss are highest in January, averaging 7.5 m/s (27 km/h), and lightest in July, at 4.4 m/s (16 km/h). The prevailing wind is from the E. The clearest skies in Selfoss come in April, when the sky is typically 76% covered; October is the cloudiest month, at 92%.
Month by month Selfoss climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
0°C
-0°C
-8°C
40%
79%
7.5 m/s
0
0
0
February
2°C
0°C
-6°C
48%
79%
7.2 m/s
0
0
0
March
3°C
1°C
-4°C
43%
85%
6.8 m/s
0
0
1
April
6°C
3°C
-0°C
24%
76%
6.3 m/s
0
0
8
May
9°C
6°C
3°C
29%
82%
5.7 m/s
0
0
21
June
11°C
8°C
6°C
32%
88%
5.3 m/s
1
0
46
July
13°C
10°C
9°C
21%
82%
4.4 m/s
7
0
71
August
13°C
10°C
9°C
25%
84%
4.8 m/s
4
0
67
September
10°C
7°C
5°C
40%
79%
5.5 m/s
0
0
35
October
7°C
4°C
0°C
43%
92%
6.1 m/s
0
0
10
November
3°C
3°C
-3°C
43%
86%
6.5 m/s
0
0
1
December
-0°C
-0°C
-7°C
41%
82%
6.7 m/s
0
0
1
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Selfoss weather by season
Year round, Selfoss has days of about -0°C at their warmest in December, its coolest month, and 13°C in July, its warmest; the coolest hours of the day run from -0°C to 10°C through the year, and the average temperature over the year is 5°C around the clock. Rain is most likely around February and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Selfoss weather in winterDecember to February
High 1°CLow -0°CRain 43%
Winter in Selfoss has typical daily highs of about 1°C and lows of about -0°C, with a 43% chance of rain on a given day.
Selfoss weather in springMarch to May
High 6°CLow 3°CRain 32%
Spring in Selfoss has typical daily highs of about 6°C and lows of about 3°C, with a 32% chance of rain on a given day.
Selfoss weather in summerJune to August
High 12°CLow 9°CRain 26%
Summer in Selfoss has typical daily highs of about 12°C and lows of about 9°C, with a 26% chance of rain on a given day.
Selfoss weather in autumnSeptember to November
High 7°CLow 4°CRain 42%
Autumn in Selfoss has typical daily highs of about 7°C and lows of about 4°C, with a 42% chance of rain on a given day.
When is the rainy season in Selfoss?
The rainy (wet) season in Selfoss runs from September to March, peaking in February with a 48% chance of rain on a given day. The dry season is April to August; July is the driest month, at 21%.
What time of year is Selfoss windiest?
Winds in Selfoss are highest in January, averaging 7.5 m/s (27 km/h), and lightest in July, at 4.4 m/s (16 km/h). The prevailing wind is from the E.
What is the average temperature in Selfoss year round?
The average temperature in Selfoss over the whole year is 5°C. July is the hottest month, with highs of about 13°C; December is the coldest, with lows of about -0°C.