Union climate

Typical historical weather for Union, 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 Union.

Annual average

12.3°C

across all months

Warmest month

28.5°C

Jul average high

Coolest month

-3.7°C

Jan average low

Annual rainfall

1068mm

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

34.6°C

24 June 2025

Coldest day

-20.4°C

7 January 2018

Wettest day

46.7mm

28 December 2018

Windiest day

7.9m/s

2 March 2018