Annual mean 9°C · wettest around May · prevailing wind SW
Warmest
25.5 °C
Coldest
-4.2 °C
Wettest
72%
Windiest
5.5 m/s
Prevailing
SW
4.5 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 Oconomowoc over the whole year is 9°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -7°C. Oconomowoc has no sharply defined rainy season: the chance of rain on a given day runs from 69% in December, the driest month, to 74% in May, the wettest. Winds in Oconomowoc are highest in April, averaging 4.0 m/s (14 km/h), and lightest in August, at 2.5 m/s (9 km/h). The prevailing wind is from the SW. The clearest skies in Oconomowoc come in July, when the sky is typically 35% covered; January is the cloudiest month, at 62%.
Month by month Oconomowoc 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
-4°C
-7°C
-10°C
69%
62%
3.7 m/s
0
0
0
February
-1°C
-6°C
-7°C
69%
49%
3.9 m/s
0
0
4
March
5°C
-1°C
-1°C
73%
51%
3.9 m/s
1
0
13
April
10°C
4°C
5°C
72%
52%
4.0 m/s
12
0
36
May
17°C
10°C
14°C
74%
47%
3.4 m/s
42
8
62
June
23°C
17°C
22°C
73%
38%
3.1 m/s
64
31
48
July
25°C
19°C
26°C
70%
35%
2.6 m/s
62
50
29
August
25°C
17°C
24°C
72%
38%
2.5 m/s
68
43
36
September
22°C
14°C
20°C
71%
41%
2.7 m/s
65
21
59
October
14°C
8°C
10°C
72%
48%
3.3 m/s
27
3
54
November
6°C
1°C
0°C
70%
50%
3.6 m/s
5
0
19
December
-0°C
-3°C
-6°C
69%
57%
3.6 m/s
0
0
3
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 Oconomowoc weather by season
Year round, Oconomowoc has days of about -4°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -7°C to 19°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around May and least likely around December. 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.
Oconomowoc weather in winterDecember to February
High -2°CLow -5°CRain 69%
Winter in Oconomowoc has typical daily highs of about -2°C and lows of about -5°C, with a 69% chance of rain on a given day.
Oconomowoc weather in springMarch to May
High 11°CLow 4°CRain 73%
Spring in Oconomowoc has typical daily highs of about 11°C and lows of about 4°C, with a 73% chance of rain on a given day.
Oconomowoc weather in summerJune to August
High 24°CLow 18°CRain 72%
Summer in Oconomowoc has typical daily highs of about 24°C and lows of about 18°C, with a 72% chance of rain on a given day.
Oconomowoc weather in autumnSeptember to November
High 14°CLow 7°CRain 71%
Autumn in Oconomowoc has typical daily highs of about 14°C and lows of about 7°C, with a 71% chance of rain on a given day.
When is the rainy season in Oconomowoc?
Oconomowoc has no sharply defined rainy season: the chance of rain on a given day runs from 69% in December, the driest month, to 74% in May, the wettest.
What time of year is Oconomowoc windiest?
Winds in Oconomowoc are highest in April, averaging 4.0 m/s (14 km/h), and lightest in August, at 2.5 m/s (9 km/h). The prevailing wind is from the SW.
What is the average temperature in Oconomowoc year round?
The average temperature in Oconomowoc over the whole year is 9°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -7°C.