Newfoundland and Labrador (St. John's)
September
Weather in Newfoundland and Labrador for September 2026
Your guide to Newfoundland and Labrador weather in September - trends and predictions
Until now, September 2026 in Newfoundland and Labrador is slightly cooler than the historical average by 0.7 °C.
The forecast for the upcoming days in Newfoundland and Labrador predicts a temperature of 13.5 °C, which is slightly above the historical average.
In general, the average temperature in Newfoundland and Labrador at the beginning of September is 17.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13 °C by the end of September.
The climate of Newfoundland and Labrador in September is notably wet, with an average of 15 rainy days, and a total of 53.8 mm of precipitation.
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Temperatures
Rain 🌧️
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15
Dry days
15
Rainy days
0
Snow days
15°/11°
Temperatures
26 km/h
Avg max wind
81 %
Avg humidity
Newfoundland and Labrador Weather September
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What’s the Weather Like in Newfoundland and Labrador This September?
Discover the average temperatures and weather trends across Newfoundland and Labrador’s cities this September.
Temperatures trend during September in Newfoundland and Labrador
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September weather in Newfoundland and Labrador day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 16° /10° | 0.6 mm | 4 | |
| 2 Sept. |  Sunny | 16° /10° | 2.2 mm | 5 | |
| 3 Sept. | Sunny | 17° /10° | 4.8 mm | 5 | |
| 4 Sept. |  Overcast | 18° /11° | 0.3 mm | 4 | |
| 5 Sept. |  Light drizzle | 15° /11° | 1.7 mm | 3 | |
| 6 Sept. |  Fog | 19° /12° | 3.5 mm | 4 | |
| 7 Sept. | Patchy rain possible | 20° /14° | 0.4 mm | 5 | |
| 8 Sept. | Patchy rain possible | 18° /13° | 2.8 mm | 3 | |
| 9 Sept. | Overcast | 15° /12° | 2.5 mm | 3 | |
| 10 Sept. | Overcast | 17° /11° | 0.5 mm | 4 | |
| 11 Sept. | Patchy rain possible | 16° /11° | 3.5 mm | 4 | |
| 12 Sept. | Overcast | 13° /10° | 2.2 mm | 3 | |
| 13 Sept. | Overcast | 15° /9° | 0.1 mm | 4 | |
| 14 Sept. | Overcast | 16° /11° | 3.8 mm | 3 | |
| 15 Sept. | Overcast | 16° /10° | 1.7 mm | 3 | |
| 16 Sept. | Light rain shower | 17° /10° | 6 mm | 3 | |
| 17 Sept. | Light rain shower | 18° /12° | 0.4 mm | 4 | |
| 18 Sept. | Patchy rain possible | 16° /11° | 0.6 mm | 4 | |
| 19 Sept. | Patchy rain possible | 14° /10° | 8 mm | 3 | |
| 20 Sept. | Light rain shower | 13° /9° | 6.8 mm | 3 | |
| 21 Sept. | Patchy rain possible | 13° /7° | 1.4 mm | 3 | |
| 22 Sept. | Light rain shower | 12° /7° | 4 mm | 3 | |
| 23 Sept. |  Cloudy | 14° /8° | 0.4 mm | 4 | |
| 24 Sept. | Patchy rain possible | 14° /8° | 1.3 mm | 3 | |
| 25 Sept. | Light rain shower | 14° /8° | 1.4 mm | 4 | |
| 26 Sept. |  Partly cloudy | 13° /7° | 1.2 mm | 3 | |
| 27 Sept. | Overcast | 14° /5° | 0 mm | 3.5 | |
| 28 Sept. | Sunny | 10° /5° | 0 mm | 3.7 | |
| 29 Sept. | Overcast | 13° /5° | 0 mm | 3.5 | |
| 30 Sept. | Fog | 13° /10° | 1.6 mm | 2 | |
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Important Notice
Our weather forecast for Newfoundland and Labrador 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 Newfoundland and Labrador forecast closer to your planned date for the most up-to-date weather information.
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Newfoundland and Labrador in September - FAQ
What are the expected maximum and minimum temperatures in Newfoundland and Labrador during September?
During September, expect a variety of temperatures with highs around 15° and lows near 11°, suitable for diverse activities and preferences.
How much rainfall should be expected in Newfoundland and Labrador during September?
Moderate rainfall is anticipated in Newfoundland and Labrador during September, with a total of 53.8 mm spread over approximately 15 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Newfoundland and Labrador during September?
The average wind speed in Newfoundland and Labrador during September is 26 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Newfoundland and Labrador
Explore the daily rainfall trends and prepare for Newfoundland and Labradors September weather 💧
Typically, Newfoundland and Labrador has 15 rainy days in September with a total of 53.8 mm of rainfall.
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