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Weather in Nanaimo for September 2025

Your guide to Nanaimo weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Nanaimo has been nearly identical to the historical average, with a temperature of 20.8 °C (showing only a slight deviation of 0.5 °C).

  • Expect cooler weather in the next days in Nanaimo with the forecast suggesting a temperature of 17.6 °C, lower than the historical average.

  • In general, the average temperature in Nanaimo at the beginning of September is 22 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.9 °C by the end of September.

    • Rain 🌧️

  • Nanaimo experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 62.2 mm.

    • More

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

Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/11°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Nanaimo Weather September

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

Temperatures trend during September in Nanaimo

See the weather trend as well as the moving average line

September weather in Nanaimo day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 23° /15° 0 mm 6
2 Sept. Sunny
Sunny
 23° /15° 0 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 0.1 mm 5
4 Sept. Sunny
Sunny
 22° /14° 0 mm 6
5 Sept. Mist
Mist
 23° /16° 0 mm 6
6 Sept. Mist
Mist
 22° /15° 0 mm 5
7 Sept. Mist
Mist
 21° /14° 8 mm 5
8 Sept. Mist
Mist
 18° /13° 11.7 mm 5
9 Sept. Mist
Mist
 18° /12° 0 mm 4
10 Sept. Cloudy
Cloudy
 20° /13° 0 mm 5
11 Sept. Mist
Mist
 17° /11° 0.6 mm 4
12 Sept. Light rain
Light rain
 16° /11° 0.9 mm 4
13 Sept. Fog
Fog
 17° /12° 0.1 mm 4
14 Sept. Moderate rain
Moderate rain
 21° /14° 7.6 mm 0.8
15 Sept. Mist
Mist
 19° /11° 0 mm 1.1
16 Sept. Sunny
Sunny
 25° /15° 0 mm 1.2
17 Sept. Sunny
Sunny
 23° /15° 0 mm 0.9
18 Sept. Sunny
Sunny
 21° /13° 0 mm 0
19 Sept. Sunny
Sunny
 21° /14° 0 mm 5
20 Sept. Sunny
Sunny
 19° /13° 0 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 14° /12° 1.5 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 0.2 mm 3
23 Sept. Moderate rain
Moderate rain
 12° /11° 7.1 mm 3
24 Sept. Moderate rain
Moderate rain
 13° /12° 11.1 mm 3
25 Sept. Patchy rain possible
Patchy rain possible
 17° /10° 2.8 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 0.4 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 11° /10° 4.5 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 14° /8° 1.5 mm 3
29 Sept. Cloudy
Cloudy
 14° /7° 0 mm 4
30 Sept. Partly cloudy
Partly cloudy
 13° /8° 0 mm 4
Next
Important Notice
Our weather forecast for Nanaimo 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 Nanaimo forecast closer to your planned date for the most up-to-date weather information.
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Nanaimo in September - FAQ

What are the expected maximum and minimum temperatures in Nanaimo during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Nanaimo during September?
Moderate rainfall is anticipated in Nanaimo during September, with a total of 62.2 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Nanaimo during September?
The average wind speed in Nanaimo during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Nanaimo

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

UV exposure in Nanaimo 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 Nanaimo, located at latitude 49.166 and longitude -123.94. Stay updated with localized weather information tailored for Nanaimo.

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