Saint John’s
September
Weather in Saint John’s for September 2025
Your guide to Saint John’s weather in September - trends and predictions
Until now, September 2025 in Saint John’s has been nearly identical to the historical average, with a temperature of 28.6 °C (showing only a slight deviation of -0.5 °C).
The forecast for the next days in Saint John’s predicts temperatures to be around 29 °C, close to the historical average.
In general, the average temperature in Saint John’s at the beginning of September is 29 °C. As the month progressed, temperatures tended to remain steady, reaching an average of 29 °C by the end of September.
Saint John’s experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 95.4 mm.
Temperatures
Rain 🌧️
7
Dry days
23
Rainy days
0
Snow days
29°/28°
Temperatures
24 km/h
Avg max wind
73 %
Avg humidity
Saint John’s Weather September
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Temperatures trend during September in Saint John’s
See the weather trend as well as the moving average line
September weather in Saint John’s day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 29° /27° | 2.3 mm | 6 | |
| 2 Sept. | Light rain shower | 29° /28° | 3.6 mm | 6 | |
| 3 Sept. | Light rain shower | 29° /28° | 2.3 mm | 6 | |
| 4 Sept. | Light rain shower | 29° /28° | 1.4 mm | 6 | |
| 5 Sept. | Light rain shower | 29° /28° | 2.2 mm | 6 | |
| 6 Sept. | Light rain shower | 29° /28° | 6.3 mm | 6 | |
| 7 Sept. | Light rain shower | 29° /27° | 3.5 mm | 6 | |
| 8 Sept. | Patchy rain possible | 29° /28° | 6 mm | 6 | |
| 9 Sept. | Patchy rain possible | 29° /27° | 6.7 mm | 6 | |
| 10 Sept. | Light rain shower | 29° /28° | 4.5 mm | 6 | |
| 11 Sept. | Light rain shower | 30° /28° | 2 mm | 6 | |
| 12 Sept. | Patchy rain possible | 29° /27° | 0.3 mm | 6 | |
| 13 Sept. |  Partly cloudy | 29° /27° | 4 mm | 6 | |
| 14 Sept. | Partly cloudy | 29° /28° | 0.7 mm | 6 | |
| 15 Sept. | Partly cloudy | 29° /28° | 1.5 mm | 6 | |
| 16 Sept. | Patchy rain possible | 29° /27° | 2.6 mm | 6 | |
| 17 Sept. |  Moderate rain | 29° /28° | 6.6 mm | 2.6 | |
| 18 Sept. | Moderate rain | 29° /28° | 9.9 mm | 2.6 | |
| 19 Sept. | Patchy rain possible | 29° /28° | 1 mm | 2.7 | |
| 20 Sept. | Patchy rain possible | 29° /28° | 0.2 mm | 0.2 | |
| 21 Sept. | Patchy rain possible | 29° /28° | 0.2 mm | 6 | |
| 22 Sept. |  Sunny | 29° /27° | 0 mm | 7 | |
| 23 Sept. | Patchy rain possible | 29° /28° | 0.9 mm | 6 | |
| 24 Sept. | Patchy rain possible | 29° /28° | 2.5 mm | 6 | |
| 25 Sept. | Patchy rain possible | 29° /28° | 4.3 mm | 6 | |
| 26 Sept. | Patchy rain possible | 29° /28° | 4.1 mm | 6 | |
| 27 Sept. | Partly cloudy | 29° /28° | 0 mm | 7 | |
| 28 Sept. | Patchy rain possible | 29° /28° | 0.2 mm | 6 | |
| 29 Sept. | Patchy rain possible | 29° /28° | 0.6 mm | 6 | |
| 30 Sept. |  Patchy light drizzle | 29° /28° | 7.1 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Saint 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 Saint John’s forecast closer to your planned date for the most up-to-date weather information.
Change Month
Saint John’s in September - FAQ
What are the expected maximum and minimum temperatures in Saint John’s during September?
During September, expect a variety of temperatures with highs around 29° and lows near 28°, suitable for diverse activities and preferences.
How much rainfall should be expected in Saint John’s during September?
Moderate rainfall is anticipated in Saint John’s during September, with a total of 95.4 mm spread over approximately 23 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Saint John’s during September?
The average wind speed in Saint John’s during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Saint John’s
Explore the daily rainfall trends and prepare for Saint John’ss September weather 💧
UV exposure in Saint John’s during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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