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Canada weather

Weather in Moncton for September 2025

Your guide to Moncton weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Moncton has been nearly identical to the historical average, with a temperature of 21.8 °C (showing only a slight deviation of -0.2 °C).

  • Expect cooler weather in the next days in Moncton with the forecast suggesting a temperature of 18.9 °C, lower than the historical average.

  • In general, the average temperature in Moncton at the beginning of September is 22.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16 °C by the end of September.

    • Rain 🌧️

  • The climate of Moncton in September is notably wet, with an average of 14 rainy days, and a total of 110.6 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
20°/11°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Moncton Weather September

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

Temperatures trend during September in Moncton

See the weather trend as well as the moving average line

September weather in Moncton day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 22° /12° 3 mm 5
2 Sept. Partly cloudy
Partly cloudy
 22° /11° 0.3 mm 5
3 Sept. Partly cloudy
Partly cloudy
 22° /11° 0 mm 6
4 Sept. Fog
Fog
 25° /10° 0 mm 6
5 Sept. Mist
Mist
 24° /12° 0 mm 6
6 Sept. Overcast
Overcast
 24° /14° 0.3 mm 5
7 Sept. Fog
Fog
 20° /15° 10.1 mm 4
8 Sept. Mist
Mist
 22° /12° 9.1 mm 5
9 Sept. Light rain shower
Light rain shower
 21° /12° 1.2 mm 5
10 Sept. Light rain shower
Light rain shower
 22° /10° 1.6 mm 5
11 Sept. Light rain shower
Light rain shower
 19° /11° 10.9 mm 4
12 Sept. Fog
Fog
 21° /10° 0 mm 5
13 Sept. Fog
Fog
 22° /11° 0.7 mm 5
14 Sept. Partly cloudy
Partly cloudy
 23° /12° 0 mm 1.1
15 Sept. Sunny
Sunny
 21° /11° 0 mm 1.2
16 Sept. Sunny
Sunny
 24° /12° 0 mm 1.2
17 Sept. Sunny
Sunny
 27° /12° 0 mm 1.3
18 Sept. Sunny
Sunny
 25° /13° 0 mm 0.1
19 Sept. Patchy rain possible
Patchy rain possible
 16° /7° 1 mm 3
20 Sept. Sunny
Sunny
 15° /5° 0 mm 3
21 Sept. Sunny
Sunny
 18° /4° 0 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 22° /11° 0.9 mm 4
23 Sept. Partly cloudy
Partly cloudy
 18° /9° 0.1 mm 4
24 Sept. Partly cloudy
Partly cloudy
 20° /8° 0 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 17° /14° 4.7 mm 3
26 Sept. Heavy rain
Heavy rain
 9° /7° 30.6 mm 2
27 Sept. Patchy rain possible
Patchy rain possible
 9° /8° 3.9 mm 2
28 Sept. Mist
Mist
 18° /11° 2.7 mm 4
29 Sept. Mist
Mist
 20° /7° 0 mm 5
30 Sept. Mist
Mist
 19° /10° 0 mm 5
Next
Important Notice
Our weather forecast for Moncton 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 Moncton forecast closer to your planned date for the most up-to-date weather information.
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Moncton in September - FAQ

What are the expected maximum and minimum temperatures in Moncton during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Moncton during September?
Significant rainfall exceeding 110.6 mm is expected in Moncton during September, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Moncton during September?
The average wind speed in Moncton during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Moncton

Explore the daily rainfall trends and prepare for Monctons September weather 💧

UV exposure in Moncton during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Moncton, located at latitude 46.095 and longitude -64.797. Stay updated with localized weather information tailored for Moncton.

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