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Weather in Fredericton for September 2025

Your guide to Fredericton weather in September - trends and predictions

    Temperatures

  • 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.

  • Rain 🌧️

  • The climate of Fredericton in September is notably wet, with an average of 14 rainy days, and a total of 131.7 mm of precipitation.

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Average dry days
16
Dry days
Average rainy days
14
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/11°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Fredericton in September average weather

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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
Sunny
21° /11° 8.5 mm 5
2 Sept. Partly cloudy
Partly cloudy
23° /10° 0.1 mm 6
3 Sept. Fog
Fog
23° /9° 0 mm 6
4 Sept. Fog
Fog
25° /11° 0 mm 6
5 Sept. Fog
Fog
27° /13° 0 mm 7
6 Sept. Overcast
Overcast
25° /12° 0 mm 6
7 Sept. Mist
Mist
22° /14° 0.6 mm 5
8 Sept. Light rain shower
Light rain shower
22° /12° 2 mm 5
9 Sept. Light rain shower
Light rain shower
23° /12° 7.2 mm 5
10 Sept. Light rain shower
Light rain shower
21° /11° 1.7 mm 5
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
20° /10° 16.7 mm 5
12 Sept. Fog
Fog
22° /11° 0 mm 6
13 Sept. Light rain shower
Light rain shower
24° /13° 2 mm 6
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
21° /12° 10.2 mm 5
15 Sept. Fog
Fog
22° /7° 0 mm 5
16 Sept. Light rain shower
Light rain shower
24° /12° 38.2 mm 6
17 Sept. Overcast
Overcast
26° /15° 8.4 mm 6
18 Sept. Light drizzle
Light drizzle
25° /14° 1.1 mm 6
19 Sept. Moderate rain
Moderate rain
20° /14° 2.9 mm 5
20 Sept. Patchy rain possible
Patchy rain possible
18° /12° 1.6 mm 4
21 Sept. Mist
Mist
17° /8° 0 mm 4
22 Sept. Sunny
Sunny
19° /7° 0 mm 5
23 Sept. Mist
Mist
17° /9° 0 mm 4
24 Sept. Cloudy
Cloudy
18° /9° 0 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
16° /9° 0 mm 4
26 Sept. Mist
Mist
17° /7° 8.9 mm 4
27 Sept. Sunny
Sunny
18° /9° 21.7 mm 5
28 Sept. Mist
Mist
20° /9° 0 mm 5
29 Sept. Mist
Mist
21° /7° 0 mm 5
30 Sept. Mist
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 21° 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 131.7 mm is expected in Fredericton during September, occurring over more than 14 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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Location coordinates Where is Fredericton?

Get accurate weather forecasts for Fredericton, located at latitude 45.945 and longitude -66.666. Stay updated with localized weather information tailored for Fredericton.

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