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Canada weather

Weather in Fredericton for September 2025

Your guide to Fredericton weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Fredericton is slightly cooler than the historical average by -1.1 °C.

  • Expect cooler weather in the next days in Fredericton with the forecast suggesting a temperature of 19.1 °C, lower than the historical average.

  • In general, the average temperature in Fredericton at the beginning of September is 23.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.1 °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.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

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 Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
23°
2
Partly cloudy
23°
3
Fog
23°
4
Fog
25°
5
Fog
24°
6
Overcast
24°
7
Mist
20°
8
Light rain shower
22°
9
Light rain shower
22°
10
Partly cloudy
22°
11
Moderate or heavy rain shower
21°
12
Fog
22°
13
Light rain shower
23°
14
Cloudy
24°
15
Sunny
22°
16
Sunny
25°
17
Sunny
28°
18
Sunny
27°
19
Patchy rain possible
17°
20
Sunny
16°
21
Sunny
21°
22
Partly cloudy
21°
23
Partly cloudy
22°
24
Patchy rain possible
12°
25
Patchy rain possible
13°
26
Patchy rain possible
11°
27
Moderate rain
8°
28
Mist
20°
29
Mist
21°
30
Mist
21°

Temperatures trend during September in Fredericton

See the weather trend as well as the moving average line

September weather in Fredericton day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 23° /12° 5.7 mm 6
2 Sept. Partly cloudy
Partly cloudy
 23° /11° 0.1 mm 6
3 Sept. Fog
Fog
 23° /11° 0 mm 5
4 Sept. Fog
Fog
 25° /11° 0 mm 6
5 Sept. Fog
Fog
 24° /12° 0 mm 6
6 Sept. Overcast
Overcast
 24° /13° 0 mm 5
7 Sept. Mist
Mist
 20° /14° 10.5 mm 5
8 Sept. Light rain shower
Light rain shower
 22° /11° 3 mm 5
9 Sept. Light rain shower
Light rain shower
 22° /11° 4.8 mm 5
10 Sept. Partly cloudy
Partly cloudy
 22° /10° 1.1 mm 5
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /9° 11.1 mm 5
12 Sept. Fog
Fog
 22° /10° 0 mm 6
13 Sept. Light rain shower
Light rain shower
 23° /12° 1.3 mm 5
14 Sept. Cloudy
Cloudy
 24° /9° 0 mm 1.1
15 Sept. Sunny
Sunny
 22° /11° 0 mm 1.3
16 Sept. Sunny
Sunny
 25° /9° 0 mm 1.3
17 Sept. Sunny
Sunny
 28° /13° 0 mm 1.3
18 Sept. Sunny
Sunny
 27° /12° 0 mm 0.1
19 Sept. Patchy rain possible
Patchy rain possible
 17° /7° 0.8 mm 3
20 Sept. Sunny
Sunny
 16° /5° 0 mm 3
21 Sept. Sunny
Sunny
 21° /4° 0 mm 4
22 Sept. Partly cloudy
Partly cloudy
 21° /9° 0.1 mm 4
23 Sept. Partly cloudy
Partly cloudy
 22° /9° 0 mm 4
24 Sept. Patchy rain possible
Patchy rain possible
 12° /8° 1.4 mm 3
25 Sept. Patchy rain possible
Patchy rain possible
 13° /11° 0.9 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 11° /3° 0.1 mm 2
27 Sept. Moderate rain
Moderate rain
 8° /3° 8 mm 2
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
Next
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.
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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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