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Weather in New Brunswick for September 2025

Your guide to New Brunswick weather in September - trends and predictions
  • In general, the average temperature in New Brunswick at the beginning of September is 22.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °C by the end of September.

  • The climate of New Brunswick in September is notably wet, with an average of 11 rainy days.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/11°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
82 %
Avg humidity

New Brunswick in September average weather

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Temperatures trend during September in New Brunswick

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
20° /11° 4.5 mm 5
2 Sept. Partly cloudy
Partly cloudy
23° /11° 0.4 mm 6
3 Sept. Partly cloudy
Partly cloudy
21° /10° 0 mm 6
4 Sept. Fog
Fog
25° /11° 0 mm 6
5 Sept. Mist
Mist
24° /13° 0 mm 6
6 Sept. Overcast
Overcast
22° /13° 0.5 mm 5
7 Sept. Fog
Fog
20° /14° 6.7 mm 5
8 Sept. Mist
Mist
24° /13° 1.1 mm 6
9 Sept. Light rain shower
Light rain shower
21° /13° 1.8 mm 5
10 Sept. Light rain shower
Light rain shower
20° /10° 2.3 mm 5
11 Sept. Light rain shower
Light rain shower
19° /10° 16.4 mm 5
12 Sept. Fog
Fog
21° /11° 0 mm 5
13 Sept. Fog
Fog
23° /14° 1.1 mm 5
14 Sept. Fog
Fog
20° /13° 1.5 mm 5
15 Sept. Mist
Mist
21° /8° 0 mm 5
16 Sept. Light rain shower
Light rain shower
24° /13° 26.1 mm 6
17 Sept. Light rain shower
Light rain shower
25° /14° 3.3 mm 6
18 Sept. Patchy rain possible
Patchy rain possible
24° /14° 0.6 mm 6
19 Sept. Light rain
Light rain
19° /14° 0.9 mm 4
20 Sept. Patchy rain possible
Patchy rain possible
18° /12° 0.4 mm 4
21 Sept. Patchy rain possible
Patchy rain possible
15° /9° 0.1 mm 4
22 Sept. Partly cloudy
Partly cloudy
17° /7° 0 mm 5
23 Sept. Overcast
Overcast
16° /9° 0 mm 4
24 Sept. Cloudy
Cloudy
18° /9° 0 mm 5
25 Sept. Light rain shower
Light rain shower
15° /9° 0.3 mm 4
26 Sept. Sunny
Sunny
18° /7° 2.2 mm 5
27 Sept. Mist
Mist
17° /9° 37.6 mm 4
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
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Important Notice
Our weather forecast for New Brunswick 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 New Brunswick forecast closer to your planned date for the most up-to-date weather information.

New Brunswick in September - FAQ

What are the expected maximum and minimum temperatures in New Brunswick 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 New Brunswick during September?
Significant rainfall exceeding 108.5 mm is expected in New Brunswick during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in New Brunswick during September?
The average wind speed in New Brunswick during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in New Brunswick

Explore the daily rainfall trends and prepare for New Brunswicks September weather 💧

UV exposure in New Brunswick during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Provinces in New Brunswick
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Location coordinates Where is New Brunswick?

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

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