Kemptville (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Kemptville.
Climate overview of Kemptville
Temperatures in Kemptville, Ontario, Canada, vary greatly throughout the year. July is the hottest month at 28°C (82°F), while January is the coldest at -3°C (27°F).
Rain/snowfall is high, totalling around 1074 mm (42 in) per year. June is the wettest month and February the driest. The city also experiences warm summers and very cold winters. The sunniest month is July, with 9.3 hours of sunshine per day on average.
Kemptville Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kemptville - and find the best time to visit.
Monthly Temperature in Kemptville
The climate in Kemptville is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a comfortable 28°C (82°F) in July, the warmest time of the year, to a very cold -3°C (27°F) during cooler months like January.
At night, you can expect temperatures ranging from 15°C (59°F) in July to around -14°C (7°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Kemptville
Kemptville has a notably wet climate with abundant precipitation, recording 1074 mm (42 in) of rain/snowfall per year. Year-round, Kemptville has a balanced climate with minimal variation in precipitation. The difference between the wettest month, June, with 105 mm (4.1 in), and the driest month, February, with 69 mm (2.7 in), is minimal. For more details, please visit our Kemptville 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 Kemptville
Seasonal changes in sunshine hours are quite dramatic in Kemptville. While July receives considerable daily sunshine with up to 9.3 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.8 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
Humidity in Kemptville by Month
The relative humidity is moderate throughout the year in Kemptville.
The city experiences its highest humidity in December, reaching 72%. In May, the humidity drops to its lowest level at 49%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Kemptville
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 -14°C (7°F).
Frequently asked questions about the climate in Kemptville
What is the best time to visit Kemptville?
May, July, August and September typically offer the most optimal weather in Kemptville. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Kemptville has warm summers and very cold winters.
What temperatures can I expect in Kemptville?
Daytime highs range from -3°C (27°F) in January to 28°C (82°F) in July. Nighttime lows range from -14°C (7°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Kemptville get?
Annual rainfall is around 1074 mm (42 in). June is the wettest month with 105 mm (4.1 in), while February is the driest with 69 mm (2.7 in).
How sunny is Kemptville?
Kemptville receives around 2,087 hours of sunshine per year. July is the sunniest month with 280 hours, while December is the cloudiest with just 83 hours. Overall, Kemptville enjoys abundant sunshine.
Kemptville 3-Day Forecast
Kemptville on the map
Kemptville is highlighted - select any city to see its climate.
Popular this month
Where to go in September - average daytime high across popular destinations.
Toronto
22°C (72°F) Niagara Falls23°C (73°F) Montréal
22°C (72°F) Ottawa22°C (72°F) Quebec City
20°C (68°F) Vancouver19°C (66°F) Calgary19°C (66°F) Whistler15°C (59°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
Canoeing the south Nahannii
The South Nahanni in the northwest of Canada is one of the most impressive wilderness rivers in the world. Canoeing the south Nahanni is something you must add to your bucket list.
See Polar Bears in Churchill Canada
Thousands of bears gather at the small town of Churchill. In the evening the northern lights give a light show against the dark evening sky. An unforgettable experience.
Banff National Park
Snowy mountains, clear blue lakes and green forests make Banff National Park a wonderful bucket list destination. The pristine wilderness is a mecca for walkers.