Onawa climate

Typical historical weather for Onawa, 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 Onawa.

Annual average

10.9°C

across all months

Warmest month

29.6°C

Jul average high

Coolest month

-9.1°C

Jan average low

Annual rainfall

853mm

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

39.5°C

21 June 2025

Coldest day

-33°C

16 February 2021

Wettest day

73.8mm

20 August 2018

Windiest day

10.7m/s

24 February 2019