Annual mean 12°C · wettest around April · prevailing wind SW
Warmest
27.9 °C
Coldest
-1.8 °C
Wettest
55%
Windiest
6.4 m/s
Prevailing
SW
5.0 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 Rantoul over the whole year is 12°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -4°C. Rantoul has no sharply defined rainy season: the chance of rain on a given day runs from 42% in January, the driest month, to 49% in April, the wettest. Winds in Rantoul are highest in March, averaging 4.9 m/s (18 km/h), and lightest in August, at 2.3 m/s (8 km/h). The prevailing wind is from the SW. The clearest skies in Rantoul come in September, when the sky is typically 30% covered; January is the cloudiest month, at 59%.
Month by month Rantoul 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
-4°C
-7°C
42%
59%
4.7 m/s
0
0
3
February
3°C
-3°C
-3°C
42%
48%
4.7 m/s
2
0
12
March
9°C
2°C
3°C
46%
50%
4.9 m/s
6
0
26
April
15°C
7°C
9°C
49%
45%
4.7 m/s
24
1
50
May
21°C
14°C
18°C
48%
44%
4.1 m/s
57
19
55
June
27°C
20°C
26°C
49%
30%
3.3 m/s
54
48
27
July
27°C
21°C
29°C
48%
32%
2.5 m/s
36
62
10
August
27°C
19°C
28°C
48%
30%
2.3 m/s
45
57
18
September
25°C
15°C
24°C
47%
30%
2.6 m/s
59
41
39
October
18°C
9°C
14°C
49%
40%
3.6 m/s
40
8
58
November
9°C
2°C
3°C
48%
41%
4.2 m/s
9
0
30
December
3°C
-1°C
-3°C
44%
52%
4.4 m/s
0
0
9
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 Rantoul weather by season
Year round, Rantoul has days of about -1°C at their warmest in January, its coolest month, and 27°C in July, its warmest; the coolest hours of the day run from -4°C to 21°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around April and least likely around January. 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.
Rantoul weather in winterDecember to February
High 2°CLow -3°CRain 43%
Winter in Rantoul has typical daily highs of about 2°C and lows of about -3°C, with a 43% chance of rain on a given day.
Rantoul weather in springMarch to May
High 15°CLow 8°CRain 48%
Spring in Rantoul has typical daily highs of about 15°C and lows of about 8°C, with a 48% chance of rain on a given day.
Rantoul weather in summerJune to August
High 27°CLow 20°CRain 48%
Summer in Rantoul has typical daily highs of about 27°C and lows of about 20°C, with a 48% chance of rain on a given day.
Rantoul weather in autumnSeptember to November
High 17°CLow 9°CRain 48%
Autumn in Rantoul has typical daily highs of about 17°C and lows of about 9°C, with a 48% chance of rain on a given day.
When is the rainy season in Rantoul?
Rantoul has no sharply defined rainy season: the chance of rain on a given day runs from 42% in January, the driest month, to 49% in April, the wettest.
What time of year is Rantoul windiest?
Winds in Rantoul are highest in March, averaging 4.9 m/s (18 km/h), and lightest in August, at 2.3 m/s (8 km/h). The prevailing wind is from the SW.
What is the average temperature in Rantoul year round?
The average temperature in Rantoul over the whole year is 12°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -4°C.