Annual mean 10°C · wettest around April · prevailing wind SW
Warmest
26.4 °C
Coldest
-3.0 °C
Wettest
22%
Windiest
5.9 m/s
Prevailing
SW
4.9 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 Round Lake Beach over the whole year is 10°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -5°C. Round Lake Beach has no sharply defined rainy season: the chance of rain on a given day runs from 14% in February, the driest month, to 18% in April, the wettest. Winds in Round Lake Beach are highest in February, averaging 4.5 m/s (16 km/h), and lightest in August, at 3.1 m/s (11 km/h). The prevailing wind is from the SW. The clearest skies in Round Lake Beach come in July, when the sky is typically 35% covered; January is the cloudiest month, at 64%.
Month by month Round Lake Beach 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
-5°C
-8°C
15%
64%
4.3 m/s
0
0
1
February
0°C
-4°C
-6°C
14%
52%
4.5 m/s
1
0
7
March
6°C
1°C
0°C
17%
54%
4.5 m/s
2
0
18
April
11°C
5°C
6°C
18%
53%
4.5 m/s
15
0
42
May
17°C
12°C
15°C
18%
48%
4.0 m/s
46
11
65
June
24°C
18°C
23°C
16%
37%
3.6 m/s
65
38
47
July
26°C
21°C
27°C
15%
35%
3.2 m/s
57
59
24
August
26°C
19°C
26°C
15%
37%
3.1 m/s
64
54
29
September
23°C
16°C
21°C
16%
41%
3.4 m/s
70
30
57
October
15°C
9°C
12°C
18%
48%
3.9 m/s
35
4
64
November
7°C
3°C
2°C
15%
52%
4.2 m/s
7
0
26
December
2°C
-2°C
-4°C
16%
59%
4.2 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 Round Lake Beach weather by season
Year round, Round Lake Beach 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 -5°C to 21°C through the year, and the average temperature over the year is 10°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.
Round Lake Beach weather in winterDecember to February
High -0°CLow -4°CRain 15%
Winter in Round Lake Beach has typical daily highs of about -0°C and lows of about -4°C, with a 15% chance of rain on a given day.
Round Lake Beach weather in springMarch to May
High 11°CLow 6°CRain 18%
Spring in Round Lake Beach has typical daily highs of about 11°C and lows of about 6°C, with a 18% chance of rain on a given day.
Round Lake Beach weather in summerJune to August
High 25°CLow 19°CRain 15%
Summer in Round Lake Beach has typical daily highs of about 25°C and lows of about 19°C, with a 15% chance of rain on a given day.
Round Lake Beach weather in autumnSeptember to November
High 15°CLow 9°CRain 16%
Autumn in Round Lake Beach has typical daily highs of about 15°C and lows of about 9°C, with a 16% chance of rain on a given day.
When is the rainy season in Round Lake Beach?
Round Lake Beach has no sharply defined rainy season: the chance of rain on a given day runs from 14% in February, the driest month, to 18% in April, the wettest.
What time of year is Round Lake Beach windiest?
Winds in Round Lake Beach are highest in February, averaging 4.5 m/s (16 km/h), and lightest in August, at 3.1 m/s (11 km/h). The prevailing wind is from the SW.
What is the average temperature in Round Lake Beach year round?
The average temperature in Round Lake Beach over the whole year is 10°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -5°C.