Merrimac climate

Typical historical weather for Merrimac, 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 Merrimac.

Annual average

12.9°C

across all months

Warmest month

29.2°C

Jul average high

Coolest month

-2.8°C

Jan average low

Annual rainfall

959mm

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

35.4°C

24 June 2025

Coldest day

-19.8°C

7 January 2018

Wettest day

49.2mm

8 August 2024

Windiest day

8.1m/s

2 March 2018