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





The numbers here describe what the September weather in St. John's, Newfoundland Canada was like for every year since 2010. A series of tables gives September 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 September. 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

September temperature averages by year in St. John's
High °F Low °F Year High °C Low °C
66 49 2021 19 9
67 51 2020 19 10
60 46 2019 16 8
60 45 2018 15 7
63 49 2017 17 9
61 46 2016 16 8
64 46 2015 18 8
63 46 2014 17 8
65 50 2013 19 10
67 50 2012 19 10
64 49 2011 18 9
63 50 2010 17 10
Number of days in September when the temperature in St. John's dropped to 0 or below, or rose to at least 21 degrees Celsius
0 °C
32 °F
Year 21 °C
70 °F
0 2021 8
0 2020 6
0 2019 3
0 2018 2
0 2017 5
0 2016 4
0 2015 10
0 2014 4
0 2013 7
0 2012 9
0 2011 7
0 2010 4

Rainy Weather iconPrecipitation

This table gives the total precipitation that fell on St. John's during September 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 September in St. John's
Days Year Inches Milli­metres
17 2021 4.3 110
10 2020 3.9 100
19 2019 6.1 154
15 2018 4.9 125
16 2017 10.4 265
19 2016 5.5 139
15 2015 6.4 163
12 2014 2.1 53
17 2013 8.3 211
8 2012 2.9 73
5 2011 2.2 55
11 2010 10.0 253

Snowy Weather iconSnow

Amount of snowfall in St. John's for September and number of days when new snow totalled at least 2.5 centimetres (1 inch)
Days Year Inches Centi­metres
0 2021 0.0 0.0
0 2020 0.0 0.0
0 2019 0.0 0.0
0 2018 0.0 0.0
0 2017 0.0 0.0
0 2016 0.0 0.0
0 2015 0.1 0.3
0 2014 0.0 0.0
0 2013 0.0 0.0
0 2012 0.0 0.0
0 2011 0.0 0.0
0 2010 0.0 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. 

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