Annual mean 18°C · wettest around January · prevailing wind SW
Warmest
29.7 °C
Coldest
16.7 °C
Wettest
19%
Windiest
4.0 m/s
Prevailing
SW
3.3 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 Lake Forest over the whole year is 18°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about 9°C. Lake Forest has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 17% in January, the wettest. Winds in Lake Forest are highest in May, averaging 2.6 m/s (9 km/h), and lightest in December, at 1.7 m/s (6 km/h). The prevailing wind is from the SW. The clearest skies in Lake Forest come in November, when the sky is typically 25% covered; May is the cloudiest month, at 52%.
Month by month Lake 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
18°C
9°C
15°C
17%
34%
1.9 m/s
54
1
88
February
18°C
9°C
15°C
17%
34%
2.2 m/s
55
4
83
March
18°C
10°C
15°C
16%
42%
2.4 m/s
57
4
84
April
21°C
12°C
18°C
8%
40%
2.5 m/s
76
11
81
May
22°C
15°C
19°C
7%
52%
2.6 m/s
84
12
79
June
25°C
17°C
23°C
3%
45%
2.5 m/s
78
32
55
July
28°C
19°C
27°C
2%
31%
2.6 m/s
57
57
26
August
29°C
20°C
28°C
5%
28%
2.4 m/s
51
64
19
September
28°C
18°C
27°C
5%
32%
2.2 m/s
62
51
30
October
26°C
15°C
23°C
9%
28%
2.0 m/s
78
36
51
November
22°C
11°C
19°C
11%
25%
1.8 m/s
82
13
76
December
18°C
9°C
16°C
15%
31%
1.7 m/s
63
1
88
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 Lake Forest weather by season
Year round, Lake Forest has days of about 18°C at their warmest in January, its coolest month, and 29°C in August, its warmest; the coolest hours of the day run from 9°C to 20°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around January and least likely around July. 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.
Lake Forest weather in winterDecember to February
High 18°CLow 9°CRain 16%
Winter in Lake Forest has typical daily highs of about 18°C and lows of about 9°C, with a 16% chance of rain on a given day.
Lake Forest weather in springMarch to May
High 20°CLow 12°CRain 10%
Spring in Lake Forest has typical daily highs of about 20°C and lows of about 12°C, with a 10% chance of rain on a given day.
Lake Forest weather in summerJune to August
High 27°CLow 19°CRain 3%
Summer in Lake Forest has typical daily highs of about 27°C and lows of about 19°C, with a 3% chance of rain on a given day.
Lake Forest weather in autumnSeptember to November
High 25°CLow 15°CRain 8%
Autumn in Lake Forest has typical daily highs of about 25°C and lows of about 15°C, with a 8% chance of rain on a given day.
When is the rainy season in Lake Forest?
Lake Forest has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 17% in January, the wettest.
What time of year is Lake Forest windiest?
Winds in Lake Forest are highest in May, averaging 2.6 m/s (9 km/h), and lightest in December, at 1.7 m/s (6 km/h). The prevailing wind is from the SW.
What is the average temperature in Lake Forest year round?
The average temperature in Lake Forest over the whole year is 18°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about 9°C.