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.
The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1981 to 2010 weather.
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 28 | 12 | January | -2 | -11 |
| 29 | 13 | February | -1 | -10 |
| 38 | 23 | March | 3 | -5 |
| 51 | 33 | April | 10 | 1 |
| 65 | 46 | May | 18 | 8 |
| 72 | 54 | June | 22 | 12 |
| 79 | 61 | July | 26 | 16 |
| 77 | 60 | August | 25 | 15 |
| 70 | 52 | September | 21 | 11 |
| 58 | 42 | October | 14 | 6 |
| 45 | 30 | November | 7 | -1 |
| 35 | 22 | December | 2 | -5 |
| 54 | 37 | Year | 12 | 3 |
| 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.
| 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.
| 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.
| -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 |
References
Environment Canada. Meteorological Service of Canada. Canadian Climate Normals. 1981-2010 Climate Normals & Averages.
Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.