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Canada weather

Weather in St. John's for September 2027

Your guide to St. John's weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in St. John's at the beginning of September is 16.8 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13 °C by the end of September.

    • Rain 🌧️

  • The climate of St. John's in September is notably wet, with an average of 11 rainy days, and a total of 63 mm of precipitation.

    • More

  • Is September a good time to visit St. John's? check out the best time to travel to St. John's page.

  • ✨ Is September a good time to visit St. John's? – Ask the AI Weatherman

Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
15°/10°
Temperatures
Average wind speed
25 km/h
Avg max wind
Average humidity
81 %
Avg humidity

St. John's Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
15°
2
Patchy rain possible
16°
3
Light rain
17°
4
Overcast
17°
5
Light drizzle
15°
6
Light rain
18°
7
Patchy rain possible
19°
8
Light rain
18°
9
Light rain
15°
10
Overcast
17°
11
Light rain
16°
12
Patchy rain possible
13°
13
Overcast
15°
14
Light rain
15°
15
Patchy rain possible
16°
16
Light rain
17°
17
Light rain shower
18°
18
Patchy rain possible
16°
19
Light rain
14°
20
Light rain
13°
21
Patchy rain possible
13°
22
Light rain
12°
23
Cloudy
14°
24
Patchy rain possible
14°
25
Light rain shower
14°
26
Patchy rain possible
13°
27
Overcast
14°
28
Overcast
12°
29
Overcast
14°
30
Sunny
12°

Temperatures trend during September in St. John's

See the weather trend as well as the moving average line

September weather in St. John's day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 15° /11° 0.6 mm 4
2 Sept. Patchy rain possible
Patchy rain possible
 16° /10° 2.2 mm 5
3 Sept. Light rain
Light rain
 17° /11° 4.8 mm 5
4 Sept. Overcast
Overcast
 17° /11° 0.3 mm 4
5 Sept. Light drizzle
Light drizzle
 15° /12° 1.7 mm 3
6 Sept. Light rain
Light rain
 18° /13° 3.5 mm 4
7 Sept. Patchy rain possible
Patchy rain possible
 19° /15° 0.4 mm 5
8 Sept. Light rain
Light rain
 18° /13° 2.8 mm 3
9 Sept. Light rain
Light rain
 15° /12° 2.5 mm 3
10 Sept. Overcast
Overcast
 17° /11° 0.5 mm 4
11 Sept. Light rain
Light rain
 16° /12° 3.5 mm 4
12 Sept. Patchy rain possible
Patchy rain possible
 13° /10° 2.2 mm 3
13 Sept. Overcast
Overcast
 15° /9° 0.1 mm 4
14 Sept. Light rain
Light rain
 15° /12° 3.8 mm 3
15 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 1.7 mm 3
16 Sept. Light rain
Light rain
 17° /11° 6 mm 3
17 Sept. Light rain shower
Light rain shower
 18° /13° 0.4 mm 4
18 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 0.6 mm 4
19 Sept. Light rain
Light rain
 14° /10° 8 mm 3
20 Sept. Light rain
Light rain
 13° /10° 6.8 mm 3
21 Sept. Patchy rain possible
Patchy rain possible
 13° /8° 1.4 mm 3
22 Sept. Light rain
Light rain
 12° /8° 4 mm 3
23 Sept. Cloudy
Cloudy
 14° /8° 0.4 mm 4
24 Sept. Patchy rain possible
Patchy rain possible
 14° /9° 1.3 mm 3
25 Sept. Light rain shower
Light rain shower
 14° /8° 1.4 mm 4
26 Sept. Patchy rain possible
Patchy rain possible
 13° /8° 1.2 mm 3
27 Sept. Overcast
Overcast
 14° /8° 0 mm 3
28 Sept. Overcast
Overcast
 12° /9° 0 mm 3
29 Sept. Overcast
Overcast
 14° /8° 0.4 mm 3
30 Sept. Sunny
Sunny
 12° /9° 0.6 mm 3
Next
Important Notice
Our weather forecast for St. John's in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the St. John's forecast closer to your planned date for the most up-to-date weather information.
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St. John's in September - FAQ

What are the expected maximum and minimum temperatures in St. John's during September?
During September, expect a variety of temperatures with highs around 15° and lows near 10°, suitable for diverse activities and preferences.

How much rainfall should be expected in St. John's during September?
Moderate rainfall is anticipated in St. John's during September, with a total of 63 mm spread over approximately 11 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in St. John's during September?
The average wind speed in St. John's during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in St. John's

Explore the daily rainfall trends and prepare for St. John'ss September weather 💧
Typically, St. John's has 11 rainy days in September with a total of 63 mm of rainfall.
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Location coordinates Where is St. John's?

Get accurate weather forecasts for St. John's, located at latitude 47.565 and longitude -52.709. Stay updated with localized weather information tailored for St. John's.

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