Annual mean 8°C · wettest around December · prevailing wind SW
Warmest
20.5 °C
Coldest
-1.7 °C
Wettest
32%
Windiest
4.7 m/s
Prevailing
SW
4.2 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Porsgrunn over the whole year is 8°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -2°C. The rainy (wet) season in Porsgrunn runs from September to February, peaking in December with a 31% chance of rain on a given day. The dry season is March to August; April is the driest month, at 13%. Winds in Porsgrunn are highest in October, averaging 4.2 m/s (15 km/h), and lightest in May, at 3.5 m/s (13 km/h). The prevailing wind is from the SW. The clearest skies in Porsgrunn come in April, when the sky is typically 54% covered; November is the cloudiest month, at 73%.
Month by month Porsgrunn 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
-1°C
-2°C
-6°C
23%
67%
4.1 m/s
0
0
1
February
1°C
-1°C
-4°C
24%
64%
4.0 m/s
0
0
2
March
4°C
0°C
-1°C
21%
62%
3.9 m/s
0
0
8
April
9°C
4°C
4°C
13%
54%
3.8 m/s
2
0
30
May
14°C
9°C
10°C
15%
55%
3.5 m/s
25
1
65
June
18°C
14°C
15°C
15%
56%
3.7 m/s
52
4
77
July
20°C
15°C
18°C
17%
55%
3.5 m/s
71
10
73
August
18°C
14°C
16°C
16%
56%
3.7 m/s
65
2
81
September
15°C
11°C
13°C
23%
64%
3.9 m/s
33
1
77
October
10°C
7°C
6°C
27%
68%
4.2 m/s
2
0
43
November
4°C
3°C
-1°C
30%
73%
4.2 m/s
0
0
10
December
1°C
0°C
-4°C
31%
69%
3.9 m/s
0
0
2
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 Porsgrunn weather by season
Year round, Porsgrunn has days of about -1°C at their warmest in January, its coolest month, and 20°C in July, its warmest; the coolest hours of the day run from -2°C to 15°C through the year, and the average temperature over the year is 8°C around the clock. Rain is most likely around December and least likely around April. 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.
Porsgrunn weather in winterDecember to February
High 0°CLow -1°CRain 26%
Winter in Porsgrunn has typical daily highs of about 0°C and lows of about -1°C, with a 26% chance of rain on a given day.
Porsgrunn weather in springMarch to May
High 9°CLow 4°CRain 16%
Spring in Porsgrunn has typical daily highs of about 9°C and lows of about 4°C, with a 16% chance of rain on a given day.
Porsgrunn weather in summerJune to August
High 19°CLow 14°CRain 16%
Summer in Porsgrunn has typical daily highs of about 19°C and lows of about 14°C, with a 16% chance of rain on a given day.
Porsgrunn weather in autumnSeptember to November
High 10°CLow 7°CRain 27%
Autumn in Porsgrunn has typical daily highs of about 10°C and lows of about 7°C, with a 27% chance of rain on a given day.
When is the rainy season in Porsgrunn?
The rainy (wet) season in Porsgrunn runs from September to February, peaking in December with a 31% chance of rain on a given day. The dry season is March to August; April is the driest month, at 13%.
What time of year is Porsgrunn windiest?
Winds in Porsgrunn are highest in October, averaging 4.2 m/s (15 km/h), and lightest in May, at 3.5 m/s (13 km/h). The prevailing wind is from the SW.
What is the average temperature in Porsgrunn year round?
The average temperature in Porsgrunn over the whole year is 8°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -2°C.