St. John's NL - Recent May Temperatures, Rain & Snow





The numbers here describe what the May weather in St. John's, Newfoundland 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 St. John's had wet or snowy weather.

The climate data come from weather measurements made at the St. John's Airport.

Temperature Weather iconTemperature

May temperature averages by year in St. John's
High °F Low °F Year High °C Low °C
53 36 2021 12 2
53 35 2020 12 2
46 33 2019 8 0
52 33 2018 11 1
46 32 2017 8 0
55 36 2016 13 2
54 35 2015 12 2
47 33 2014 8 0
55 38 2013 13 4
55 38 2012 13 3
52 37 2011 11 3
49 36 2010 9 2
Number of days in May when the temperature in St. John's dropped to -18 or 0 or below, or rose to at least 21 degrees Celsius
-18 °C
0 °F
0 °C
32 °F
Year 21 °C
70 °F
0 4 2021 1
0 13 2020 3
0 14 2019 0
0 14 2018 0
0 20 2017 0
0 8 2016 3
0 9 2015 1
0 17 2014 0
0 8 2013 3
0 7 2012 4
0 3 2011 1
0 2 2010 0

Rainy Weather iconPrecipitation

This table gives the total precipitation that fell on St. John's 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 St. John's
Days Year Inches Milli­metres
13 2021 1.4 37
13 2020 3.8 96
13 2019 3.1 78
17 2018 6.5 166
16 2017 1.8 45
14 2016 3.2 81
16 2015 3.2 80
14 2014 6.7 169
15 2013 2.7 69
16 2012 3.0 77
6 2011 3.1 79
12 2010 6.5 164

Snowy Weather iconSnow

Amount of snowfall in St. John's for May and number of days when new snow totalled at least 2.5 centimetres (1 inch)
Days Year Inches Centi­metres
0 2021 1.4 3.6
0 2020 0.5 1.3
1 2019 3.2 8.1
1 2018 3.1 7.9
2 2017 3.0 7.6
1 2016 1.1 2.8
0 2015 1.4 3.6
1 2014 4.7 11.9
0 2013 0.0 0.0
1 2012 2.8 7.1
0 2011 0.0 0.0
2 2010 3.5 8.9
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. 

St. John's - Recent Years
St. John's - Extremes
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