Oswego (IL) Weather and Climate: A Comprehensive Guide
The climate in Oswego is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to very cold in the cooler months.
It also experiences much rain/snowfall throughout the year.
Let's now guide you through the climate details for a complete overview.
Average maximum day and minimum night temperature
In Oswego, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 29°C in July. In January, the coolest month of the year, temperatures drop to a very cold -1°C.
At night, you can expect cooler temperatures, with averages dropping to around -10°C during this month. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Oswego experiences significant rain/snowfall throughout the year, averaging 1029 mm of precipitation annually. Oswego can be quite wet during June, receiving approximately 130 mm of precipitation over 14 rainy days. In contrast January, experiences much drier conditions, with 47 mm of snowfall, spread across 10 snowy days. For more details, please visit our Oswego Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Oswego can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 10.6 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 3.6 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Oswego.
The city experiences its highest humidity in December, reaching 76%. In May, the humidity drops to its lowest level at 64%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
broken clouds and no rain overcast and no rain overcast and rainForecast for Oswego (IL)
4 m/s
4 m/s
5 m/s
The best time of year to visit Oswego in the United States of America
During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
The coldest season / winter is in the following months: January, February and December.
July has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of -1°C.
June tops the wettest month list with 130 mm of rainfall.
January is the driest month with 47 mm of precipitation.
July is the sunniest month with an average of 319 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
