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Williamstown climate
Typical historical weather for Williamstown, 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 Williamstown.
Annual average
13.1°C
across all months
Warmest month
29.6°C
Jul average high
Coolest month
-3.4°C
Jan average low
Annual rainfall
1323mm
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
37.4°C
27 August 2024
Coldest day
-26.1°C
22 January 2025
Wettest day
68.4mm
23 June 2016
Windiest day
7.7m/s
23 December 2022
See the detail: Williamstown on 23 June 2016.