Annual mean 10°C · wettest around November · prevailing wind W
Warmest
24.6 °C
Coldest
-2.9 °C
Wettest
16%
Windiest
6.6 m/s
Prevailing
W
5.2 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 Oswego over the whole year is 10°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -4°C. Oswego has no sharply defined rainy season: the chance of rain on a given day runs from 10% in September, the driest month, to 17% in November, the wettest. Winds in Oswego are highest in February, averaging 5.9 m/s (21 km/h), and lightest in July, at 3.5 m/s (13 km/h). The prevailing wind is from the W. The clearest skies in Oswego come in July, when the sky is typically 38% covered; January is the cloudiest month, at 78%.
Month by month Oswego 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
-10°C
14%
78%
5.7 m/s
0
0
1
February
-0°C
-3°C
-7°C
12%
73%
5.9 m/s
0
0
5
March
3°C
0°C
-4°C
13%
63%
5.9 m/s
2
0
10
April
9°C
5°C
3°C
15%
58%
5.2 m/s
9
0
27
May
15°C
11°C
11°C
15%
50%
3.8 m/s
31
5
58
June
21°C
17°C
18°C
12%
44%
3.8 m/s
60
18
63
July
25°C
20°C
24°C
12%
38%
3.5 m/s
73
43
39
August
24°C
19°C
23°C
12%
41%
3.7 m/s
75
37
45
September
20°C
15°C
18°C
10%
45%
3.7 m/s
66
14
69
October
14°C
10°C
10°C
17%
59%
4.5 m/s
26
2
59
November
6°C
4°C
0°C
17%
67%
5.7 m/s
4
0
16
December
1°C
-0°C
-5°C
17%
76%
5.6 m/s
0
0
4
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 Oswego weather by season
Year round, Oswego has days of about -2°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -4°C to 20°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around November and least likely around September. 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.
Oswego weather in winterDecember to February
High -0°CLow -2°CRain 14%
Winter in Oswego has typical daily highs of about -0°C and lows of about -2°C, with a 14% chance of rain on a given day.
Oswego weather in springMarch to May
High 9°CLow 6°CRain 14%
Spring in Oswego has typical daily highs of about 9°C and lows of about 6°C, with a 14% chance of rain on a given day.
Oswego weather in summerJune to August
High 23°CLow 19°CRain 12%
Summer in Oswego has typical daily highs of about 23°C and lows of about 19°C, with a 12% chance of rain on a given day.
Oswego weather in autumnSeptember to November
High 14°CLow 10°CRain 15%
Autumn in Oswego has typical daily highs of about 14°C and lows of about 10°C, with a 15% chance of rain on a given day.
When is the rainy season in Oswego?
Oswego has no sharply defined rainy season: the chance of rain on a given day runs from 10% in September, the driest month, to 17% in November, the wettest.
What time of year is Oswego windiest?
Winds in Oswego are highest in February, averaging 5.9 m/s (21 km/h), and lightest in July, at 3.5 m/s (13 km/h). The prevailing wind is from the W.
What is the average temperature in Oswego year round?
The average temperature in Oswego over the whole year is 10°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -4°C.