Mercer climate

Typical historical weather for Mercer, 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 Mercer.

Annual average

10.7°C

across all months

Warmest month

27.6°C

Jul average high

Coolest month

-5.9°C

Jan average low

Annual rainfall

1379mm

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

33.4°C

23 June 2025

Coldest day

-26.3°C

22 January 2025

Wettest day

87.7mm

9 September 2018

Windiest day

7.8m/s

29 December 2025