Saint John NB Recent September Temperatures, Rainfall

The numbers here describe what the September weather in Saint John, New Brunswick Canada was like for every year since 2010. A series of tables gives September data by year for temperature and precipitation.

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

The climate data come from weather measurements made at the Saint John Airport.

Temperature

September temperature averages by year in Saint John
High °F	Low °F	Year	High °C	Low °C
70	49	2023	21	9
68	48	2022	20	9
69	49	2021	20	9
66	44	2020	19	7
65	42	2019	18	6
68	44	2018	20	7
70	50	2017	21	10
68	46	2016	20	8
71	47	2015	22	8
67	43	2014	19	6
65	46	2013	19	8
–	–	2012	–	–
68	47	2011	20	8
67	49	2010	19	9

Number of days in September when the temperature in Saint John 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
0	2023	14	0
0	2022	13	0
0	2021	11	0
2	2020	11	0
1	2019	6	0
4	2018	11	0
1	2017	16	0
1	2016	14	0
3	2015	15	0
1	2014	10	0
1	2013	8	0
–	2012	–	–
0	2011	8	0
0	2010	4	1

Rain

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

Total rainfall for September in Saint John
Days	Year	Inches	Millimetres
11	2023	5.1	131
12	2022	4.9	123
10	2021	5.5	139
11	2020	3.7	94
13	2019	4.9	123
10	2018	4.3	109
10	2017	4.8	121
10	2016	2.3	58
6	2015	8.8	225
11	2014	2.1	52
12	2013	5.3	134
–	2012	–	–
6	2011	1.4	36
7	2010	2.9	73

Saint John NB - Recent September Temperatures and Rainfall

Temperature

Rain

Reference

More on Weather in Saint John