Annual mean 15°C · wettest around May · prevailing wind SW
Warmest
29.8 °C
Coldest
1.1 °C
Wettest
48%
Windiest
6.0 m/s
Prevailing
SW
4.6 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 Grain Valley over the whole year is 15°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -1°C. Grain Valley has no sharply defined rainy season: the chance of rain on a given day runs from 38% in September, the driest month, to 46% in May, the wettest. Winds in Grain Valley are highest in March, averaging 4.7 m/s (17 km/h), and lightest in August, at 2.9 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in Grain Valley come in September, when the sky is typically 22% covered; January is the cloudiest month, at 45%.
Month by month Grain Valley 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
3°C
-1°C
-3°C
39%
45%
4.1 m/s
3
0
13
February
6°C
1°C
1°C
41%
38%
4.3 m/s
10
0
27
March
12°C
6°C
7°C
42%
43%
4.7 m/s
18
1
45
April
17°C
10°C
12°C
45%
37%
4.7 m/s
40
4
63
May
22°C
16°C
21°C
46%
40%
3.6 m/s
63
29
53
June
28°C
21°C
28°C
43%
23%
3.5 m/s
37
62
14
July
29°C
23°C
31°C
41%
24%
3.0 m/s
21
60
5
August
28°C
21°C
29°C
40%
26%
2.9 m/s
35
59
11
September
26°C
18°C
26°C
38%
22%
3.1 m/s
53
55
28
October
19°C
12°C
16°C
39%
31%
3.7 m/s
49
16
59
November
12°C
6°C
7°C
38%
33%
3.9 m/s
19
3
46
December
6°C
2°C
1°C
38%
37%
4.0 m/s
7
0
23
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 Grain Valley weather by season
Year round, Grain Valley has days of about 3°C at their warmest in January, its coolest month, and 29°C in July, its warmest; the coolest hours of the day run from -1°C to 23°C through the year, and the average temperature over the year is 15°C around the clock. Rain is most likely around May and least likely around September. 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.
Grain Valley weather in winterDecember to February
High 5°CLow 0°CRain 39%
Winter in Grain Valley has typical daily highs of about 5°C and lows of about 0°C, with a 39% chance of rain on a given day.
Grain Valley weather in springMarch to May
High 17°CLow 11°CRain 44%
Spring in Grain Valley has typical daily highs of about 17°C and lows of about 11°C, with a 44% chance of rain on a given day.
Grain Valley weather in summerJune to August
High 29°CLow 22°CRain 41%
Summer in Grain Valley has typical daily highs of about 29°C and lows of about 22°C, with a 41% chance of rain on a given day.
Grain Valley weather in autumnSeptember to November
High 19°CLow 12°CRain 38%
Autumn in Grain Valley has typical daily highs of about 19°C and lows of about 12°C, with a 38% chance of rain on a given day.
When is the rainy season in Grain Valley?
Grain Valley has no sharply defined rainy season: the chance of rain on a given day runs from 38% in September, the driest month, to 46% in May, the wettest.
What time of year is Grain Valley windiest?
Winds in Grain Valley are highest in March, averaging 4.7 m/s (17 km/h), and lightest in August, at 2.9 m/s (10 km/h). The prevailing wind is from the SW.
What is the average temperature in Grain Valley year round?
The average temperature in Grain Valley over the whole year is 15°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -1°C.