Williamstown Weather and Climate: A Comprehensive Guide
The climate in Williamstown is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to mild in the cooler months.
Williamstown has a dry climate with relatively low precipitation levels.
Let's now guide you through the climate details for a complete overview.
Average maximum day and minimum night temperature
In Williamstown, temperatures differ significantly between summer and winter months. Average maximum daytime temperatures range from a comfortable 29°C in January, the warmest time of the year, to a moderate 15°C during cooler months like August.
At night, temperatures typically drop to an average of around 6°C during these months.Check out our detailed temperature page for more information.
Temperature ranges by month
Precipitation and rainy days
Williamstown's climate is marked by below-average rainfall, accumulating 472 mm of precipitation yearly. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, September receives moderate rainfall, averaging 59 mm of precipitation, recorded across 9 rainy days. In contrast, the drier season, March brings less rainfall, with 18 mm over 6 rainy days. For more details, please visit our Williamstown Precipitation page.
The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Williamstown. While January receives considerable daily sunshine with up to 10.9 hours, June marks the darkest time of the year, where sunshine is scarce with only 4.7 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is moderate throughout the year in Williamstown.
The city experiences its highest humidity in June, reaching 61%. In January, the humidity drops to its lowest level at 36%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
clear and no rain clear and no rain almost clear and no rainForecast for Williamstown
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Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Williamstown in Australia
During the months of March, April, October and November you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
January has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is August with an average maximum temperature of 15°C.
September tops the wettest month list with 59 mm of rainfall.
March is the driest month with 18 mm of precipitation.
January is the sunniest month with an average of 326 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
