ClimateForecastDecemberJanuary >>

Casselman Climate by Month

The climate in Casselman is marked by big temperature swings throughout the year. Temperatures range from warm during the warmest months to very cold in the cooler months. It is also known for its large amounts of rain/snowfall. Now, let’s break down all the climate details for a clearer picture.

Average day and night temperature

In Casselman, temperatures differ significantly between summer and winter months. Typically, daytime temperatures range from a comfortable 28°C in July to a very cold -4°C in the coolest month, January. Nights are cooler, with temperatures generally dropping to -15°C, particularly during the colder months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Casselman experiences significant rain/snowfall throughout the year, averaging 1127 mm of precipitation annually. Precipitation levels in Casselman remain relatively steady throughout the year. June has the most rain, with 110 mm over 12 days. In February, this drops slightly to 72 mm, making the city's climate fairly predictable.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

For those who appreciate different seasons, Casselman serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.3 hours of sunshine daily, and embrace the darker days in December, offering only 2.8 hours of daily sunlight.

Monthly hours of sunshine

Data from: Ottawa, Canada (49 KM, 30 Miles).

Daily hours of sunshine

Data from: Ottawa, Canada (49 KM, 30 Miles).

The best time of year to visit Casselman in Canada

During the months of May, June and September 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:
  • When is winter in Casselman?
    The coldest season / winter is in the following months: January, February and December.
  • Which is the warmest month in Casselman?
    July has an average maximum temperature of 28°C and is the warmest month of the year.
  • Which is the coldest month in Casselman?
    The coldest month is January with an average maximum temperature of -4°C.
  • Which is the wettest month in Casselman?
    June tops the wettest month list with 110 mm of rainfall.
  • Which is the driest month in Casselman?
    February is the driest month with 72 mm of precipitation.
  • Which is the sunniest month in Casselman?
    July is the sunniest month with an average of 280 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.

    Forecast for Casselman

    Sun   Dec 15
    -5°C | -17°C
    E 11 km/h
    overcast and no rain

    overcast and no rain

    Mon   Dec 16
    4°C | -5°C
    SE 11 km/h
    2.2 mm
    overcast and no rain

    overcast and no rain

    Tue   Dec 17
    7°C | 0°C
    SW 29 km/h
    3.3 mm
    overcast and  chance of slight rain

    overcast and chance of slight rain