Newfoundland and Labrador (St. John's)
September
Weather in Newfoundland and Labrador for September 2025
Your guide to Newfoundland and Labrador weather in September - trends and predictions
Until now, September 2025 in Newfoundland and Labrador is slightly cooler than the historical average by -1.5 °C.
Expect cooler weather in the next days in Newfoundland and Labrador with the forecast suggesting a temperature of 15.4 °C, lower than the historical average.
In general, the average temperature in Newfoundland and Labrador at the beginning of September is 17.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.3 °C by the end of September.
The climate of Newfoundland and Labrador in September is notably wet, with an average of 13 rainy days, and a total of 46.4 mm of precipitation.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
17
Dry days
13
Rainy days
0
Snow days
15°/11°
Temperatures
25 km/h
Avg max wind
82 %
Avg humidity
Newfoundland and Labrador Weather September
Move between months or click on a day
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
See the weather trend as well as the moving average line
September weather in Newfoundland and Labrador day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 16° /10° | 0.6 mm | 4 | |
| 2 Sept. |  Sunny | 17° /11° | 3 mm | 5 | |
| 3 Sept. |  Moderate rain | 17° /12° | 6.4 mm | 4 | |
| 4 Sept. |  Overcast | 18° /11° | 0 mm | 4 | |
| 5 Sept. |  Light drizzle | 15° /12° | 0.4 mm | 4 | |
| 6 Sept. |  Fog | 20° /13° | 0 mm | 5 | |
| 7 Sept. | Fog | 19° /15° | 0.1 mm | 5 | |
| 8 Sept. | Light rain shower | 19° /14° | 3.5 mm | 4 | |
| 9 Sept. | Overcast | 17° /14° | 2.2 mm | 4 | |
| 10 Sept. | Light rain shower | 18° /12° | 0.5 mm | 5 | |
| 11 Sept. | Patchy rain possible | 15° /11° | 3.7 mm | 3 | |
| 12 Sept. | Overcast | 14° /11° | 2.4 mm | 3 | |
| 13 Sept. | Overcast | 14° /10° | 0.1 mm | 4 | |
| 14 Sept. | Overcast | 15° /11° | 1.5 mm | 3 | |
| 15 Sept. | Overcast | 16° /11° | 1.3 mm | 4 | |
| 16 Sept. | Patchy rain possible | 15° /8° | 1.1 mm | 0.9 | |
| 17 Sept. |  Partly cloudy | 13° /7° | 0.1 mm | 0.4 | |
| 18 Sept. | Partly cloudy | 20° /11° | 0 mm | 0.9 | |
| 19 Sept. | Moderate rain | 20° /15° | 10.3 mm | 0.8 | |
| 20 Sept. | Patchy rain possible | 12° /8° | 1.9 mm | 0 | |
| 21 Sept. | Sunny | 13° /7° | 0 mm | 3 | |
| 22 Sept. | Partly cloudy | 18° /10° | 0 mm | 4 | |
| 23 Sept. | Patchy rain possible | 16° /10° | 0.7 mm | 3 | |
| 24 Sept. | Patchy rain possible | 13° /8° | 0.2 mm | 2 | |
| 25 Sept. | Sunny | 16° /7° | 0 mm | 4 | |
| 26 Sept. | Sunny | 17° /9° | 0 mm | 4 | |
| 27 Sept. | Patchy rain possible | 9° /7° | 0 mm | 2 | |
| 28 Sept. | Sunny | 15° /5° | 0 mm | 3 | |
| 29 Sept. |  Cloudy | 18° /11° | 0.1 mm | 3 | |
| 30 Sept. | Sunny | 12° /10° | 0.2 mm | 4 | |
| Next | |||||
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.
Change Month
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?
In September, Newfoundland and Labrador can expect light to moderate rainfall, totaling 46.4 mm across approximately 13 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Newfoundland and Labrador during September?
The average wind speed in Newfoundland and Labrador during September is 25 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 💧
Top locations in Newfoundland and Labrador
Select a location for an accurate weather forecast
More Locations Quick links
More Newfoundland and Labrador weather pages
You are here
Where is Newfoundland and Labrador?Get accurate weather forecasts for Newfoundland and Labrador, located at latitude 47.565 and longitude -52.709. Stay updated with localized weather information tailored for Newfoundland and Labrador.
Found a mistake?
We appreciate your attention to details. Tell us here.