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Weather in Moncton for September 2026

Your guide to Moncton weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Moncton is cooler than usual, with temperatures averaging 17 °C, this is 4.1 °C below the typical seasonal average.

  • Expect cooler weather in the next days in Moncton with the forecast suggesting a temperature of 17.9 °C, lower than the historical average.

  • In general, the average temperature in Moncton at the beginning of September is 21.3 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 18.6 °C by the end of September.

    • Rain 🌧️

  • The climate of Moncton in September is notably wet, with an average of 15 rainy days, and a total of 110.4 mm of precipitation.

    • More

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

Average dry days
15
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/11°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Moncton Weather September

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

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
 21° /11° 2.2 mm 6
2 Sept. Partly cloudy
Partly cloudy
 21° /10° 0.2 mm 6
3 Sept. Partly cloudy
Partly cloudy
 22° /11° 1.8 mm 5
4 Sept. Fog
Fog
 23° /11° 159.3 mm 5
5 Sept. Mist
Mist
 22° /12° 87.9 mm 5
6 Sept. Overcast
Overcast
 21° /13° 55 mm 4
7 Sept. Fog
Fog
 19° /13° 8.6 mm 4
8 Sept. Mist
Mist
 21° /11° 9.8 mm 5
9 Sept. Light rain shower
Light rain shower
 20° /10° 0.9 mm 5
10 Sept. Light rain shower
Light rain shower
 22° /10° 12.4 mm 4
11 Sept. Sunny
Sunny
 17° /10° 0 mm 4.9
12 Sept. Sunny
Sunny
 20° /6° 0 mm 5.3
13 Sept. Overcast
Overcast
 20° /13° 0 mm 4.2
14 Sept. Sunny
Sunny
 21° /10° 1.8 mm 4.4
15 Sept. Sunny
Sunny
 17° /6° 0 mm 5
16 Sept. Overcast
Overcast
 21° /9° 0 mm 6
17 Sept. Mist
Mist
 20° /15° 68.1 mm 4
18 Sept. Moderate rain
Moderate rain
 15° /10° 92.6 mm 3
19 Sept. Patchy rain possible
Patchy rain possible
 16° /7° 0.6 mm 5
20 Sept. Sunny
Sunny
 15° /8° 0 mm 5
21 Sept. Sunny
Sunny
 19° /9° 0 mm 5
22 Sept. Overcast
Overcast
 14° /7° 0 mm 3
23 Sept. Overcast
Overcast
 17° /8° 65.5 mm 3
24 Sept. Light rain shower
Light rain shower
 18° /10° 4.7 mm 5
25 Sept. Light rain shower
Light rain shower
 16° /8° 1.2 mm 4
26 Sept. Sunny
Sunny
 20° /9° 14.1 mm 5
27 Sept. Mist
Mist
 18° /9° 25.1 mm 4
28 Sept. Mist
Mist
 19° /10° 1.8 mm 4
29 Sept. Mist
Mist
 21° /9° 0 mm 5
30 Sept. Overcast
Overcast
 18° /10° 0 mm 4
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 110.4 mm is expected in Moncton during September, occurring over more than 15 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 16 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 💧
Typically, Moncton has 15 rainy days in September with a total of 110.4 mm of rainfall.

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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