Fredericton
September
Weather in Fredericton for September 2025
Your guide to Fredericton weather in September - trends and predictions
In general, the average temperature in Fredericton at the beginning of September is 23.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.7 °C by the end of September.
The climate of Fredericton in September is notably wet, with an average of 11 rainy days.
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19
Dry days
11
Rainy days
0
Snow days
22°/11°
Temperatures
14 km/h
Avg max wind
81 %
Avg humidity
Fredericton in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2  23° | 3  23° | 4 25° | 5 27° | 6  25° | 7 22° |
| 8  22° | 9 23° | 10 21° | 11  20° | 12 22° | 13 24° | 14 21° |
| 15 22° | 16 24° | 17 26° | 18  25° | 19  20° | 20 18° | 21 17° |
| 22 19° | 23 17° | 24  18° | 25 16° | 26 17° | 27 18° | 28 20° |
| 29 21° | 30 21° |
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Temperatures trend during September in Fredericton
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 21° /11° | 8.5 mm | 5 | |
| 2 Sept. | Partly cloudy | 23° /10° | 0.1 mm | 6 | |
| 3 Sept. | Fog | 23° /9° | 0 mm | 6 | |
| 4 Sept. | Fog | 25° /11° | 0 mm | 6 | |
| 5 Sept. | Fog | 27° /13° | 0 mm | 7 | |
| 6 Sept. | Overcast | 25° /12° | 0 mm | 6 | |
| 7 Sept. | Mist | 22° /14° | 0.6 mm | 5 | |
| 8 Sept. | Light rain shower | 22° /12° | 2 mm | 5 | |
| 9 Sept. | Light rain shower | 23° /12° | 7.2 mm | 5 | |
| 10 Sept. | Light rain shower | 21° /11° | 1.7 mm | 5 | |
| 11 Sept. | Moderate or heavy rain shower | 20° /10° | 16.7 mm | 5 | |
| 12 Sept. | Fog | 22° /11° | 0 mm | 6 | |
| 13 Sept. | Light rain shower | 24° /13° | 2 mm | 6 | |
| 14 Sept. | Moderate or heavy rain shower | 21° /12° | 10.2 mm | 5 | |
| 15 Sept. | Fog | 22° /7° | 0 mm | 5 | |
| 16 Sept. | Light rain shower | 24° /12° | 38.2 mm | 6 | |
| 17 Sept. | Overcast | 26° /15° | 8.4 mm | 6 | |
| 18 Sept. | Light drizzle | 25° /14° | 1.1 mm | 6 | |
| 19 Sept. | Moderate rain | 20° /14° | 2.9 mm | 5 | |
| 20 Sept. | Patchy rain possible | 18° /12° | 1.6 mm | 4 | |
| 21 Sept. | Mist | 17° /8° | 0 mm | 4 | |
| 22 Sept. | Sunny | 19° /7° | 0 mm | 5 | |
| 23 Sept. | Mist | 17° /9° | 0 mm | 4 | |
| 24 Sept. | Cloudy | 18° /9° | 0 mm | 5 | |
| 25 Sept. | Patchy rain possible | 16° /9° | 0 mm | 4 | |
| 26 Sept. | Mist | 17° /7° | 8.9 mm | 4 | |
| 27 Sept. | Sunny | 18° /9° | 21.7 mm | 5 | |
| 28 Sept. | Mist | 20° /9° | 0 mm | 5 | |
| 29 Sept. | Mist | 21° /7° | 0 mm | 5 | |
| 30 Sept. | Mist | 21° /12° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Fredericton 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 Fredericton forecast closer to your planned date for the most up-to-date weather information.
Fredericton in September - FAQ
What are the expected maximum and minimum temperatures in Fredericton during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Fredericton during September?
Significant rainfall exceeding 178.2 mm is expected in Fredericton during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Fredericton during September?
The average wind speed in Fredericton during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Fredericton
Explore the daily rainfall trends and prepare for Frederictons September weather 💧
UV exposure in Fredericton during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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