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New Zealand weather

Weather in Hamilton for September 2025

Your guide to Hamilton weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Hamilton is slightly cooler than the historical average by -1.4 °C.

  • The forecast for the upcoming days in Hamilton predicts a temperature of 16.8 °C, which is slightly above the historical average.

  • In general, the average temperature in Hamilton at the beginning of September is 15.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 17 °C by the end of September.

    • Rain 🌧️

  • Hamilton in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 124.8 mm.

Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/6°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
84 %
Avg humidity

Hamilton Weather September

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

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. Mist
Mist
 16° /5° 5 mm 4
2 Sept. Mist
Mist
 17° /5° 0.8 mm 4
3 Sept. Fog
Fog
 16° /7° 5.8 mm 4
4 Sept. Patchy rain possible
Patchy rain possible
 15° /6° 0.3 mm 5
5 Sept. Moderate rain
Moderate rain
 15° /6° 5.8 mm 5
6 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 15° /7° 7.2 mm 4
7 Sept. Patchy rain possible
Patchy rain possible
 16° /6° 6.2 mm 4
8 Sept. Fog
Fog
 15° /3° 0.6 mm 4
9 Sept. Partly cloudy
Partly cloudy
 15° /2° 0.1 mm 4
10 Sept. Light rain shower
Light rain shower
 16° /6° 6.2 mm 5
11 Sept. Light rain shower
Light rain shower
 15° /5° 2.4 mm 5
12 Sept. Mist
Mist
 15° /4° 9.3 mm 4
13 Sept. Light rain shower
Light rain shower
 14° /5° 0.9 mm 4
14 Sept. Cloudy
Cloudy
 16° /7° 7.2 mm 4
15 Sept. Cloudy
Cloudy
 15° /5° 5.3 mm 4
16 Sept. Patchy rain possible
Patchy rain possible
 17° /10° 0.5 mm 1.2
17 Sept. Patchy rain possible
Patchy rain possible
 17° /10° 0.3 mm 1.2
18 Sept. Moderate rain
Moderate rain
 15° /9° 5.9 mm 0.7
19 Sept. Sunny
Sunny
 16° /4° 0.1 mm 1.3
20 Sept. Sunny
Sunny
 16° /2° 0 mm 0
21 Sept. Partly cloudy
Partly cloudy
 17° /5° 0 mm 5
22 Sept. Patchy rain possible
Patchy rain possible
 19° /8° 0.2 mm 4
23 Sept. Patchy rain possible
Patchy rain possible
 14° /12° 1.5 mm 4
24 Sept. Patchy rain possible
Patchy rain possible
 18° /8° 0.7 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 15° /7° 0.1 mm 4
26 Sept. Patchy rain possible
Patchy rain possible
 17° /8° 0.5 mm 4
27 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0.3 mm 5
28 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 0.4 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 19° /10° 1.9 mm 4
30 Sept. Moderate rain
Moderate rain
 15° /4° 8.6 mm 4
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 16° and cooler nights around 6°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Hamilton during September?
Significant rainfall exceeding 124.8 mm is expected in Hamilton during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Hamilton during September?
The average wind speed in Hamilton during September is 20 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 💧

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Location coordinates Where is Hamilton?

Get accurate weather forecasts for Hamilton, located at latitude -37.783 and longitude 175.283. Stay updated with localized weather information tailored for Hamilton.

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