Annual mean 11°C · wettest around February · prevailing wind SW
Warmest
19.7 °C
Coldest
5.4 °C
Wettest
30%
Windiest
7.7 m/s
Prevailing
SW
6.2 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 Grimsby over the whole year is 11°C. August is the hottest month, with highs of about 19°C; January is the coldest, with lows of about 4°C. Grimsby has no sharply defined rainy season: the chance of rain on a given day runs from 16% in April, the driest month, to 25% in February, the wettest. Winds in Grimsby are highest in February, averaging 6.5 m/s (23 km/h), and lightest in July, at 4.5 m/s (16 km/h). The prevailing wind is from the SW. The clearest skies in Grimsby come in April, when the sky is typically 58% covered; December is the cloudiest month, at 68%.
Month by month Grimsby 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
6°C
4°C
0°C
19%
65%
5.8 m/s
0
0
5
February
8°C
5°C
1°C
25%
64%
6.5 m/s
0
0
13
March
9°C
5°C
3°C
22%
65%
6.0 m/s
1
0
23
April
11°C
6°C
5°C
16%
58%
5.6 m/s
4
0
37
May
14°C
10°C
10°C
21%
61%
5.2 m/s
16
0
66
June
17°C
13°C
13°C
23%
63%
4.9 m/s
41
1
77
July
19°C
15°C
16°C
21%
62%
4.5 m/s
62
4
80
August
19°C
14°C
16°C
17%
59%
4.8 m/s
65
2
81
September
17°C
12°C
14°C
20%
59%
4.9 m/s
40
1
78
October
14°C
10°C
9°C
21%
62%
5.5 m/s
9
0
65
November
9°C
7°C
4°C
21%
66%
5.6 m/s
0
0
31
December
7°C
5°C
2°C
24%
68%
5.8 m/s
0
0
14
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 Grimsby weather by season
Year round, Grimsby has days of about 6°C at their warmest in January, its coolest month, and 19°C in August, its warmest; the coolest hours of the day run from 4°C to 15°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around February 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.
Grimsby weather in winterDecember to February
High 7°CLow 5°CRain 23%
Winter in Grimsby has typical daily highs of about 7°C and lows of about 5°C, with a 23% chance of rain on a given day.
Grimsby weather in springMarch to May
High 11°CLow 7°CRain 19%
Spring in Grimsby has typical daily highs of about 11°C and lows of about 7°C, with a 19% chance of rain on a given day.
Grimsby weather in summerJune to August
High 18°CLow 14°CRain 20%
Summer in Grimsby has typical daily highs of about 18°C and lows of about 14°C, with a 20% chance of rain on a given day.
Grimsby weather in autumnSeptember to November
High 13°CLow 10°CRain 21%
Autumn in Grimsby has typical daily highs of about 13°C and lows of about 10°C, with a 21% chance of rain on a given day.
When is the rainy season in Grimsby?
Grimsby has no sharply defined rainy season: the chance of rain on a given day runs from 16% in April, the driest month, to 25% in February, the wettest.
What time of year is Grimsby windiest?
Winds in Grimsby are highest in February, averaging 6.5 m/s (23 km/h), and lightest in July, at 4.5 m/s (16 km/h). The prevailing wind is from the SW.
What is the average temperature in Grimsby year round?
The average temperature in Grimsby over the whole year is 11°C. August is the hottest month, with highs of about 19°C; January is the coldest, with lows of about 4°C.