Kemptville (ON) Temperature by Month

Kemptville in Ontario, Canada sees significant seasonal temperature differences, with daytime highs between -3°C (27°F) in January and 28°C (82°F) in July, averaging 13°C (55°F) annually. Explore the full monthly breakdown below.

In Kemptville, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 15°C (59°F) in July to -14°C (7°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Kemptville by month:

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. July, the warmest month of the year, receives 280 hours of sunshine.

The chart below shows the average temperature throughout the year:

Kemptville's average annual maximum temperature is 13°C (55°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.

In Kemptville, January is the coolest month, with average highs of -3°C (27°F) and humidity around 66%, considered high. In July, the warmest month, temperatures average 28°C (82°F) with 53% humidity, conditions that feel moderate. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Kemptville this rarely lasts long on the ground.

For more on Kemptville's weather, including monthly rainfall, sunshine hours, and humidity, visit our Kemptville climate page.