Ottawa - Recent May Temperatures, Rain & Snow





The numbers here describe what the May weather in Ottawa, Ontario Canada was like for every year since 2010. A series of tables gives May data by year for temperature, precipitation and snowfall.

They begin with average maximum and minimum temperatures in degrees Fahrenheit and Celsius. That's followed by how many hot or cold days occurred each May. Then there's information on how much rain and snow actually landed this month during recent years, as well as how often Ottawa had wet or snowy weather.

The climate data come from weather measurements made near downtown Ottawa.

Temperature Weather iconTemperature

May temperature averages by year in Ottawa
High °F Low °F Year High °C Low °C
66 45 2020 19 7
62 44 2019 17 7
72 49 2018 22 9
63 47 2017 17 8
70 47 2016 21 9
73 50 2015 23 10
68 49 2014 20 9
70 48 2013 21 9
72 51 2012 22 11
66 49 2011 19 9
71 50 2010 22 10
Number of days in May when the temperature in Ottawa dropped to 0 or below, or rose to at least 21 or 32 degrees Celsius
0 °C
32 °F
Year 21 °C
70 °F
32 °C
90 °F
4 2020 11 1
0 2019 4 0
0 2018 18 0
1 2017 7 0
0 2016 16 1
0 2015 19 0
0 2014 14 0
1 2013 16 0
0 2012 18 0
1 2011 11 0
3 2010 20 2

Rainy Weather iconPrecipitation

This table gives the total precipitation that fell on Ottawa during May in each year from 2010. The number of days with precipitation counts the days when rainfall or snowfall (when melted) amounted to 0.254 millimeters (0.01 inches) or more.

Total precipitation for May in Ottawa
Days Year Inches Milli­metres
5 2020 1.9 48
14 2019 4.0 103
11 2018 1.7 44
18 2017 6.8 172
8 2016 1.0 26
5 2015 2.6 65
7 2014 3.0 75
7 2013 3.1 78
10 2012 3.3 83
10 2011 4.2 107
7 2010 1.8 45

Snowy Weather iconSnow

Amount of snowfall in Ottawa for May and number of days when new snow totalled at least 1 inch (2.5 centimetres)
Days Year Inches Centi­metres
0 2020 0.2 1
0 2019 0 0
0 2018 0 0
0 2017 0 0
0 2016 0 0
0 2015 0 0
0 2014 0 0
0 2013 0 0
0 2012 0 0
0 2011 0 0
0 2010 0 0
Reference

Environment and Climate Change Canada. Historical Climate Data. Historical Data

Jay Lawrimore. 2016. Global Summary of the Month, Version 1.0. NOAA National Centers for Environmental Information. 

Ottawa - Recent Years
Ottawa - Extremes
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