Kingston Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in Kingston, 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 Kingston, 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.

Average Kingston temperatures
High °F Low °F   High °C Low °C
26 10 January -3 -12
28 12 February -2 -11
37 21 March 3 -6
50 34 April 10 1
62 45 May 16 7
71 54 June 22 12
77 60 July 25 16
75 59 August 24 15
67 51 September 20 11
56 40 October 13 5
45 31 November 7 -1
33 19 December 1 -7
52 36 Year 11 2

Days of Hot Weather in Kingston

The hottest days at Kingston usually have temperatures peaking in the low-thirties Celsius. The city averages just three days a year with thirty-degree weather, which can show up from April to August. Temperatures above 35 °C (95 °F) are not normal here.

Days per month in Kingston above 10, 20 or 30 °C
  10 °C
50 °F
20 °C
68 °F
30 °C
86 °F
January 0 0 0
February 0 0 0
March 3 0 0
April 15 1 0
May 30 6 0
June 30 19 0
July 31 30 2
August 31 29 1
September 30 13 0
October 24 1 0
November 8 0 0
December 1 0 0
Year 203 99 3

When Kingston Has Frosty Weather

Kingston typically has 143 days a year when the minimum temperature is at 0 °C or below. The average date for the last frost in spring is April 28. Frost normally returns here on October 6. The frost-free period extends for 161 days on average between the final spring frost and the first fall frost.

Average number of days with freezing temperatures in Kingston
  0 °C
32 °F
January 29
February 27
March 26
April 11
May 1
June 0
July 0
August 0
September 0
October 6
November 16
December 26
Year 143

How Often Kingston Has Cold Temperatures

Kingston's chilliest winter nights have lows in the minus-twenties °C (below -3 °F). The city averages 11 nights a year, mainly in January and February, when the thermometer drops that low. Temperatures below -30 °C (-22 °F) happen here on an average of once every five years.

From November to April, Kingston can remain below freezing all day long. The city typically has 57 days a year when the temperature never rises above 0 °C.

Days per month on average in Kingston when the minimum temperature drops below -2, -10, or -20 °C
  -2 °C
28 °F
-10 °C
14 °F
-20 °C
-4 °F
January 27 17 5
February 24 16 3
March 21 8 1
April 6 0 0
May 0 0 0
June 0 0 0
July 0 0 0
August 0 0 0
September 0 0 0
October 2 0 0
November 11 1 0
December 23 10 2
Year 114 53 11
Reference

Environment Canada. Meteorological Service of Canada. Canadian Climate Normals. 1981-2010 Climate Normals & Averages.

Ontario Temperatures
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