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Weather in Hamilton for September 2026

Your guide to Hamilton weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Hamilton is slightly cooler than the historical average by 0.9 °C.

  • Expect cooler weather in the next days in Hamilton with the forecast suggesting a temperature of 20.9 °C, lower than the historical average.

  • In general, the average temperature in Hamilton at the beginning of September is 24.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.9 °C by the end of September.

    • Rain 🌧️

  • The climate of Hamilton in September is notably wet, with an average of 12 rainy days, and a total of 66 mm of precipitation.

    • More

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

Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/14°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Hamilton Weather September

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

Temperatures trend during September in Hamilton

See the weather trend as well as the moving average line

September weather in Hamilton day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 26° /15° 0.3 mm 6
2 Sept. Mist
Mist
 25° /14° 40.2 mm 4
3 Sept. Cloudy
Cloudy
 26° /14° 0.8 mm 6
4 Sept. Sunny
Sunny
 25° /16° 3.6 mm 6
5 Sept. Sunny
Sunny
 26° /15° 0 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 25° /16° 5.8 mm 6
7 Sept. Light rain shower
Light rain shower
 21° /14° 1.4 mm 5
8 Sept. Overcast
Overcast
 21° /12° 0 mm 5
9 Sept. Overcast
Overcast
 23° /13° 2 mm 4
10 Sept. Overcast
Overcast
 22° /14° 0 mm 5
11 Sept. Patchy rain possible
Patchy rain possible
 23° /14° 0.1 mm 6
12 Sept. Sunny
Sunny
 29° /14° 0 mm 6.1
13 Sept. Sunny
Sunny
 24° /15° 0.1 mm 5.8
14 Sept. Sunny
Sunny
 19° /11° 0 mm 5.7
15 Sept. Overcast
Overcast
 23° /13° 1 mm 5
16 Sept. Overcast
Overcast
 24° /19° 0 mm 5
17 Sept. Patchy rain possible
Patchy rain possible
 19° /16° 0.2 mm 4
18 Sept. Light rain shower
Light rain shower
 25° /16° 15.3 mm 5
19 Sept. Light rain shower
Light rain shower
 19° /12° 16.9 mm 4
20 Sept. Sunny
Sunny
 17° /11° 0 mm 5
21 Sept. Sunny
Sunny
 17° /12° 0 mm 5
22 Sept. Overcast
Overcast
 19° /14° 0 mm 5
23 Sept. Sunny
Sunny
 23° /16° 0 mm 6
24 Sept. Sunny
Sunny
 17° /10° 0 mm 4
25 Sept. Sunny
Sunny
 18° /9° 0.1 mm 4
26 Sept. Mist
Mist
 22° /14° 0.4 mm 5
27 Sept. Fog
Fog
 20° /13° 0 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 21° /14° 1.1 mm 5
29 Sept. Overcast
Overcast
 21° /14° 1.1 mm 5
30 Sept. Fog
Fog
 20° /14° 0 mm 5
Next
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.
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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 14°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Hamilton during September?
Moderate rainfall is anticipated in Hamilton during September, with a total of 66 mm spread over approximately 12 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Hamilton during September?
The average wind speed in Hamilton during September is 16 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 💧
Typically, Hamilton has 12 rainy days in September with a total of 66 mm of rainfall.

UV exposure in Hamilton 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 Hamilton, located at latitude 43.25 and longitude -79.85. Stay updated with localized weather information tailored for Hamilton.

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