Oswego climate

Typical historical weather for Oswego, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for Oswego.

Annual average

15.5°C

across all months

Warmest month

32.7°C

Jul average high

Coolest month

-2.5°C

Jan average low

Annual rainfall

1178mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

40.6°C

20 August 2023

Coldest day

-27.4°C

16 February 2021

Wettest day

93.1mm

30 April 2019

Windiest day

8.8m/s

19 March 2025