Annual mean 8°C · wettest around November · prevailing wind SW
Warmest
20.0 °C
Coldest
-1.3 °C
Wettest
47%
Windiest
5.0 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 Grimstad over the whole year is 8°C. July is the hottest month, with highs of about 19°C; January is the coldest, with lows of about -1°C. Grimstad has no sharply defined rainy season: the chance of rain on a given day runs from 23% in April, the driest month, to 44% in November, the wettest. Winds in Grimstad are highest in October, averaging 4.1 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 Grimstad come in April, when the sky is typically 54% covered; November is the cloudiest month, at 74%.
Month by month Grimstad 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
-1°C
-5°C
38%
65%
4.0 m/s
0
0
1
February
2°C
-1°C
-3°C
35%
67%
3.9 m/s
0
0
3
March
5°C
0°C
-1°C
32%
63%
3.8 m/s
0
0
9
April
9°C
3°C
4°C
23%
54%
3.7 m/s
2
0
29
May
14°C
9°C
10°C
24%
54%
3.5 m/s
22
1
64
June
18°C
13°C
15°C
27%
56%
3.6 m/s
50
4
77
July
19°C
14°C
17°C
23%
55%
3.5 m/s
67
8
76
August
18°C
13°C
16°C
26%
59%
3.5 m/s
62
2
81
September
15°C
11°C
13°C
34%
65%
3.8 m/s
32
1
75
October
10°C
7°C
6°C
39%
72%
4.1 m/s
2
0
44
November
5°C
3°C
0°C
44%
74%
4.1 m/s
0
0
13
December
2°C
1°C
-3°C
44%
69%
3.9 m/s
0
0
3
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 Grimstad weather by season
Year round, Grimstad has days of about -0°C at their warmest in January, its coolest month, and 19°C in July, its warmest; the coolest hours of the day run from -1°C to 14°C through the year, and the average temperature over the year is 8°C around the clock. Rain is most likely around November 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.
Grimstad weather in winterDecember to February
High 1°CLow -0°CRain 39%
Winter in Grimstad has typical daily highs of about 1°C and lows of about -0°C, with a 39% chance of rain on a given day.
Grimstad weather in springMarch to May
High 9°CLow 4°CRain 26%
Spring in Grimstad has typical daily highs of about 9°C and lows of about 4°C, with a 26% chance of rain on a given day.
Grimstad weather in summerJune to August
High 18°CLow 13°CRain 25%
Summer in Grimstad has typical daily highs of about 18°C and lows of about 13°C, with a 25% chance of rain on a given day.
Grimstad weather in autumnSeptember to November
High 10°CLow 7°CRain 39%
Autumn in Grimstad has typical daily highs of about 10°C and lows of about 7°C, with a 39% chance of rain on a given day.
When is the rainy season in Grimstad?
Grimstad has no sharply defined rainy season: the chance of rain on a given day runs from 23% in April, the driest month, to 44% in November, the wettest.
What time of year is Grimstad windiest?
Winds in Grimstad are highest in October, averaging 4.1 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 Grimstad year round?
The average temperature in Grimstad over the whole year is 8°C. July is the hottest month, with highs of about 19°C; January is the coldest, with lows of about -1°C.