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Weather in Hamilton for September 2025

Your guide to Hamilton weather in September - trends and predictions
  • In general, the average temperature in Hamilton at the beginning of September is 26.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.1 °C by the end of September.

  • Hamilton sees moderate rainfall in September, averaging 8 rainy days.

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Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/13°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
70 %
Avg humidity

Hamilton in September average weather

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Temperatures trend during September in Hamilton

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. Partly cloudy
Partly cloudy
25° /14° 0.2 mm 6
2 Sept. Mist
Mist
23° /12° 0.4 mm 6
3 Sept. Cloudy
Cloudy
28° /13° 0.7 mm 7
4 Sept. Cloudy
Cloudy
29° /16° 0 mm 7
5 Sept. Overcast
Overcast
30° /17° 0 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
29° /19° 11.5 mm 6
7 Sept. Light rain shower
Light rain shower
22° /14° 2.8 mm 5
8 Sept. Overcast
Overcast
22° /12° 0 mm 5
9 Sept. Overcast
Overcast
22° /13° 0.2 mm 5
10 Sept. Overcast
Overcast
21° /14° 0 mm 5
11 Sept. Patchy rain possible
Patchy rain possible
24° /14° 0.1 mm 5
12 Sept. Light rain shower
Light rain shower
25° /15° 3.2 mm 6
13 Sept. Overcast
Overcast
21° /12° 0 mm 6
14 Sept. Mist
Mist
22° /12° 0 mm 6
15 Sept. Partly cloudy
Partly cloudy
24° /13° 0 mm 7
16 Sept. Mist
Mist
24° /12° 0 mm 6
17 Sept. Light rain shower
Light rain shower
21° /15° 1.7 mm 5
18 Sept. Overcast
Overcast
22° /13° 0 mm 5
19 Sept. Overcast
Overcast
22° /12° 0 mm 5
20 Sept. Mist
Mist
22° /12° 0 mm 5
21 Sept. Mist
Mist
23° /14° 6 mm 5
22 Sept. Mist
Mist
22° /14° 0 mm 5
23 Sept. Mist
Mist
21° /14° 4.7 mm 5
24 Sept. Cloudy
Cloudy
20° /15° 0.9 mm 5
25 Sept. Partly cloudy
Partly cloudy
23° /16° 31.3 mm 6
26 Sept. Mist
Mist
22° /14° 0.5 mm 5
27 Sept. Overcast
Overcast
18° /11° 0 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
19° /14° 1.7 mm 5
29 Sept. Overcast
Overcast
19° /16° 1.6 mm 4
30 Sept. Fog
Fog
20° /14° 0 mm 5
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Important Notice
Our weather forecast for Hamilton 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 Hamilton forecast closer to your planned date for the most up-to-date weather information.

Hamilton in September - FAQ

What are the expected maximum and minimum temperatures in Hamilton during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Hamilton during September?
Expect minimal rainfall in Hamilton during September, with a total of 18.1 mm over approximately 8 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Hamilton during September?
The average wind speed in Hamilton during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Hamilton

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

UV exposure in Hamilton during September

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

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Location coordinates Where is Hamilton?

Get accurate weather forecasts for Hamilton, located at latitude 43.25 and longitude -79.85. Stay updated with localized weather information tailored for Hamilton.

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