Guelph Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Guelph, Ontario during each month of the year.
The average high and low temperatures are listed below monthly and annually for the city, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 10, 20 or 30 °C each month in Guelph, scroll down farther. There are also monthly and yearly counts of days with frost and cold weather.
All the numbers are long-term historical averages based on climate data gathered from 1981 to 2010.
|High °F||Low °F||High °C||Low °C|
Days of Hot Weather in Guelph
The hottest days at Guelph usually have temperatures peaking in the low-thirties Celsius. The city averages seven days a year with thirty-degree weather, which can show up from May to September. Temperatures above 35 °C (95 °F), happen on an average of three days a decade.
When Guelph Has Frosty Weather
Guelph typically has 160 days a year when the minimum temperature is at 0 °C or below. The average date for the last frost in spring is May 18. Frost normally returns here on September 22. The frost-free period extends for 125 days on average between the final spring frost and the first fall frost.
How Often Guelph Has Cold Temperatures
Guelph's chilliest winter nights have lows in the minus-twenties °C (below -3 °F). The city averages eight nights a year, usually in January and February, when the thermometer drops that low. Temperatures below -30 °C (-22 °F) happen about once every two or three years.
From November to April, Guelph can remain below freezing all day long. The city typically has 66 days a year when the temperature never rises above 0 °C.
Environment Canada. Meteorological Service of Canada. Canadian Climate Normals. 1981-2010 Climate Normals & Averages.