Annual mean 11°C · wettest around April · prevailing wind SW
Warmest
26.6 °C
Coldest
-2.7 °C
Wettest
29%
Windiest
6.6 m/s
Prevailing
SW
5.5 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 River Forest over the whole year is 11°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -4°C. River Forest has no sharply defined rainy season: the chance of rain on a given day runs from 20% in February, the driest month, to 24% in April, the wettest. Winds in River Forest are highest in March, averaging 5.7 m/s (21 km/h), and lightest in July, at 3.9 m/s (14 km/h). The prevailing wind is from the SW. The clearest skies in River Forest come in August, when the sky is typically 48% covered; January is the cloudiest month, at 70%.
Month by month River Forest 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
-2°C
-4°C
-8°C
22%
70%
5.5 m/s
0
0
1
February
1°C
-3°C
-6°C
20%
61%
5.5 m/s
1
0
7
March
6°C
2°C
0°C
24%
62%
5.7 m/s
3
0
17
April
11°C
7°C
6°C
24%
62%
5.5 m/s
15
0
38
May
18°C
13°C
14°C
24%
60%
4.8 m/s
43
10
58
June
24°C
19°C
23°C
21%
50%
4.5 m/s
59
33
45
July
26°C
22°C
26°C
22%
49%
3.9 m/s
55
52
25
August
26°C
20°C
26°C
21%
48%
4.0 m/s
61
48
30
September
23°C
17°C
21°C
21%
50%
4.3 m/s
68
26
55
October
15°C
11°C
11°C
24%
56%
5.0 m/s
32
4
59
November
7°C
4°C
2°C
21%
59%
5.4 m/s
5
0
23
December
2°C
-1°C
-4°C
23%
67%
5.3 m/s
0
0
6
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 River Forest weather by season
Year round, River Forest has days of about -2°C at their warmest in January, its coolest month, and 26°C in July, its warmest; the coolest hours of the day run from -4°C to 22°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around April 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.
River Forest weather in winterDecember to February
High 0°CLow -3°CRain 22%
Winter in River Forest has typical daily highs of about 0°C and lows of about -3°C, with a 22% chance of rain on a given day.
River Forest weather in springMarch to May
High 12°CLow 7°CRain 24%
Spring in River Forest has typical daily highs of about 12°C and lows of about 7°C, with a 24% chance of rain on a given day.
River Forest weather in summerJune to August
High 26°CLow 20°CRain 21%
Summer in River Forest has typical daily highs of about 26°C and lows of about 20°C, with a 21% chance of rain on a given day.
River Forest weather in autumnSeptember to November
High 15°CLow 10°CRain 22%
Autumn in River Forest has typical daily highs of about 15°C and lows of about 10°C, with a 22% chance of rain on a given day.
When is the rainy season in River Forest?
River Forest has no sharply defined rainy season: the chance of rain on a given day runs from 20% in February, the driest month, to 24% in April, the wettest.
What time of year is River Forest windiest?
Winds in River Forest are highest in March, averaging 5.7 m/s (21 km/h), and lightest in July, at 3.9 m/s (14 km/h). The prevailing wind is from the SW.
What is the average temperature in River Forest year round?
The average temperature in River Forest over the whole year is 11°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -4°C.