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Weather in Fredericton for September 2026

Your guide to Fredericton weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Fredericton is cooler than usual, with temperatures averaging 19.2 °C, this is 2.8 °C below the typical seasonal average.

  • Expect cooler weather in the next days in Fredericton with the forecast suggesting a temperature of 19.4 °C, lower than the historical average.

  • In general, the average temperature in Fredericton at the beginning of September is 22.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.9 °C by the end of September.

    • Rain 🌧️

  • Fredericton in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 133.4 mm.

    • More

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

Average dry days
13
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/11°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
76 %
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
21°
4
Fog
24°
5
Fog
23°
6
Overcast
21°
7
Mist
21°
8
Light rain shower
21°
9
Overcast
21°
10
Partly cloudy
23°
11
Sunny
20°
12
Sunny
23°
13
Overcast
24°
14
Sunny
19°
15
Sunny
19°
16
Cloudy
24°
17
Overcast
24°
18
Light rain shower
15°
19
Fog
18°
20
Sunny
17°
21
Sunny
20°
22
Overcast
16°
23
Moderate or heavy rain shower
14°
24
Sunny
18°
25
Patchy rain possible
16°
26
Mist
19°
27
Sunny
18°
28
Mist
20°
29
Mist
22°
30
Mist
19°

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° /11° 4.3 mm 6
2 Sept. Partly cloudy
Partly cloudy
 23° /10° 0 mm 6
3 Sept. Fog
Fog
 21° /10° 23.8 mm 4
4 Sept. Fog
Fog
 24° /12° 8.1 mm 5
5 Sept. Fog
Fog
 23° /12° 0.6 mm 5
6 Sept. Overcast
Overcast
 21° /12° 1.2 mm 5
7 Sept. Mist
Mist
 21° /12° 7.9 mm 5
8 Sept. Light rain shower
Light rain shower
 21° /11° 2.2 mm 5
9 Sept. Overcast
Overcast
 21° /9° 3.6 mm 5
10 Sept. Partly cloudy
Partly cloudy
 23° /10° 7.2 mm 4
11 Sept. Sunny
Sunny
 20° /10° 0 mm 5
12 Sept. Sunny
Sunny
 23° /7° 0 mm 5.3
13 Sept. Overcast
Overcast
 24° /13° 0 mm 3.1
14 Sept. Sunny
Sunny
 19° /8° 1.7 mm 4.5
15 Sept. Sunny
Sunny
 19° /5° 0 mm 5
16 Sept. Cloudy
Cloudy
 24° /8° 0.6 mm 6
17 Sept. Overcast
Overcast
 24° /15° 65.3 mm 5
18 Sept. Light rain shower
Light rain shower
 15° /9° 88 mm 3
19 Sept. Fog
Fog
 18° /6° 0 mm 5
20 Sept. Sunny
Sunny
 17° /7° 0 mm 5
21 Sept. Sunny
Sunny
 20° /7° 0 mm 6
22 Sept. Overcast
Overcast
 16° /6° 0 mm 4
23 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /9° 96.5 mm 3
24 Sept. Sunny
Sunny
 18° /10° 7.6 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
 16° /8° 6.7 mm 4
26 Sept. Mist
Mist
 19° /9° 24.8 mm 4
27 Sept. Sunny
Sunny
 18° /9° 14.5 mm 5
28 Sept. Mist
Mist
 20° /9° 1.1 mm 5
29 Sept. Mist
Mist
 22° /9° 0 mm 5
30 Sept. Mist
Mist
 19° /11° 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 133.4 mm is expected in Fredericton during September, occurring over more than 17 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 💧
Typically, Fredericton has 17 rainy days in September with a total of 133.4 mm of rainfall.

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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