Chatham (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Chatham.
Climate overview of Chatham
Temperatures in Chatham, Ontario, Canada, vary greatly throughout the year. July is the hottest month at 28°C (82°F), while January is the coldest at 1°C (34°F).
With around 981 mm (39 in) of annual rain/snowfall, the city has moderate precipitation levels. June is the wettest month and February the driest. It also has warm summers and very cold winters. July is the sunniest month, averaging 9.8 hours of sunshine per day.
Chatham Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chatham - and find the best time to visit.
Monthly Temperature in Chatham
The climate in Chatham is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 28°C (82°F) in July to a very cold 1°C (34°F) in the coolest month, January.
Nights vary from 19°C (66°F) in July to around -7°C (19°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Chatham
Generally, Chatham receives mid-range precipitation levels, with 981 mm (39 in) annually. Precipitation levels in Chatham remain relatively steady throughout the year. June has the most rain, with 100 mm (3.9 in) over 10 days. In the driest month February, this drops slightly to 66 mm (2.6 in), making the city's climate fairly predictable. For more details, please visit our Chatham Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Chatham
For those who appreciate different seasons, Chatham serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.8 hours of sunshine daily, and embrace the darker days in December, offering only 2.7 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Chatham by Month
The relative humidity is moderate throughout the year in Chatham.
The city experiences its highest humidity in December, reaching 70%. In April, the humidity drops to its lowest level at 52%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Chatham
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -7°C (19°F).
Frequently asked questions about the climate in Chatham
What is the best time to visit Chatham?
May, July, August and September typically offer the most optimal weather in Chatham. In contrast, January, February, March, November and December tend to have less optimal conditions. Chatham has warm summers and very cold winters.
What temperatures can I expect in Chatham?
Daytime highs range from 1°C (34°F) in January to 28°C (82°F) in July. Nighttime lows range from -7°C (19°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Chatham get?
Annual rainfall is around 981 mm (39 in). June is the wettest month with 100 mm (3.9 in), while February is the driest with 66 mm (2.6 in).
How sunny is Chatham?
Chatham receives around 2,282 hours of sunshine per year. July is the sunniest month with 293 hours, while December is the cloudiest with just 82 hours. Overall, Chatham enjoys abundant sunshine.
Chatham 3-Day Forecast
Chatham on the map
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