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St. John's weather in Canada
Weather in September 2025
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St. John's weather in September 2025

The temperatures in St. John's in September are comfortable with low of 15°C and and high up to 17°C.

You can expect about 3 to 8 days of rain in St. John's during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in St. John's in September 2025.

If you’re planning to visit St. John's in the near future, we highly recommend that you review the 14 day weather forecast for St. John's before you arrive.

Temperatures
Temperatures
17° / 15°
Rainy Days
Rainy Days
5
Snowy Days
Snowy Days
0
Dry Days
Dry Days
25
Rainfall
Rainfall
77
mm
10.0
Sun Hours
10.0
Hrs

Explore the weather in St. John's in other months

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January
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February
03
March
04
April
05
May
06
June
07
July
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August
09
September
10
October
11
November
12
December

St. John's annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 10° / 7° 10 21 1 146 mm
Bad
 St. John's in January
February 9° / 7° 9 19 1 110 mm
Bad
 St. John's in February
March 10° / 7° 6 25 0 81 mm
Ok
 St. John's in March
April 11° / 9° 5 25 0 60 mm
Ok
 St. John's in April
May 13° / 10° 4 28 0 57 mm
Ok
 St. John's in May
June 15° / 13° 4 26 0 70 mm
Good
 St. John's in June
July 17° / 15° 5 26 0 67 mm
Good
 St. John's in July
August 17° / 15° 5 26 0 91 mm
Good
 St. John's in August
September 17° / 15° 5 25 0 77 mm
Good
 St. John's in September
October 15° / 13° 8 23 0 143 mm
Ok
 St. John's in October
November 13° / 11° 10 20 0 172 mm
Bad
 St. John's in November
December 11° / 9° 10 21 0 165 mm
Bad
 St. John's in December
Temperatures in St. John's in September
Rain in St. John's in September

Weather in St. John's in September - FAQ

What is the average temperature in St. John's in September?
The average temperature in St. John's in September is 15/17° C.
What is the chance of rain in St. John's in September?
On average, there are 5 rainy days in St. John's during September.
Weather wise, is September a good time to visit St. John's?
The weather in St. John's in September is good.
Can it snow in St. John's in September?
On average, there are 0 snowy days in St. John's in September.
More about the weather in St. John's
St. John's 14 day weather Long range weather for St. John's St. John's weather in November St. John's weather in December St. John's Webcam Weather tomorrow Hotels in St. John's