Annual mean 11°C · wettest around May · prevailing wind W
Warmest
29.4 °C
Coldest
-1.9 °C
Wettest
36%
Windiest
8.0 m/s
Prevailing
W
5.7 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Grand Island over the whole year is 11°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -6°C. Grand Island has no sharply defined rainy season: the chance of rain on a given day runs from 19% in February, the driest month, to 28% in May, the wettest. Winds in Grand Island are highest in April, averaging 5.8 m/s (21 km/h), and lightest in August, at 3.4 m/s (12 km/h). The prevailing wind is from the W. The clearest skies in Grand Island come in June, when the sky is typically 22% covered; January is the cloudiest month, at 43%.
Month by month Grand Island 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
-6°C
-7°C
21%
43%
4.6 m/s
0
0
4
February
2°C
-6°C
-5°C
19%
33%
4.8 m/s
1
0
13
March
9°C
0°C
2°C
22%
40%
5.4 m/s
7
0
31
April
15°C
5°C
8°C
24%
35%
5.8 m/s
24
2
51
May
21°C
13°C
17°C
28%
41%
4.7 m/s
56
13
64
June
28°C
20°C
26°C
25%
22%
4.5 m/s
52
56
24
July
28°C
21°C
29°C
26%
24%
3.5 m/s
37
68
11
August
27°C
19°C
27°C
23%
26%
3.4 m/s
48
60
21
September
25°C
15°C
23°C
23%
23%
3.8 m/s
65
40
43
October
17°C
6°C
11°C
23%
28%
4.4 m/s
40
3
63
November
10°C
1°C
3°C
24%
29%
4.6 m/s
10
0
35
December
3°C
-4°C
-4°C
21%
30%
4.7 m/s
1
0
10
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 Grand Island weather by season
Year round, Grand Island has days of about -0°C at their warmest in January, its coolest month, and 28°C in July, its warmest; the coolest hours of the day run from -6°C to 21°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around May and least likely around February. 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.
Grand Island weather in winterDecember to February
High 1°CLow -6°CRain 20%
Winter in Grand Island has typical daily highs of about 1°C and lows of about -6°C, with a 20% chance of rain on a given day.
Grand Island weather in springMarch to May
High 15°CLow 6°CRain 25%
Spring in Grand Island has typical daily highs of about 15°C and lows of about 6°C, with a 25% chance of rain on a given day.
Grand Island weather in summerJune to August
High 28°CLow 20°CRain 25%
Summer in Grand Island has typical daily highs of about 28°C and lows of about 20°C, with a 25% chance of rain on a given day.
Grand Island weather in autumnSeptember to November
High 17°CLow 7°CRain 23%
Autumn in Grand Island has typical daily highs of about 17°C and lows of about 7°C, with a 23% chance of rain on a given day.
When is the rainy season in Grand Island?
Grand Island has no sharply defined rainy season: the chance of rain on a given day runs from 19% in February, the driest month, to 28% in May, the wettest.
What time of year is Grand Island windiest?
Winds in Grand Island are highest in April, averaging 5.8 m/s (21 km/h), and lightest in August, at 3.4 m/s (12 km/h). The prevailing wind is from the W.
What is the average temperature in Grand Island year round?
The average temperature in Grand Island over the whole year is 11°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -6°C.