Hottest (avg)
#9 / 12
Hamilton in September
September weather, climate averages, and packing tips.
Avg High
Avg Low
Rain
Daylight 12h
What to expect
September lands in the midst of spring in Hamilton, where the weather is warming up. Daytime highs average 15°C / 59°F, dropping to 7°C / 45°F at night.
The atmosphere is generally mild but frequently damp, typical of changeable seasons.
September in context
How it compares to the rest of the year in Hamilton.
Wettest (avg)
#4 / 12
Daylight Hours
#7 / 12
Windiest (avg)
#3 / 12
Highest UV
#7 / 12
Most Humid
#5 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 11.8 hours
- UV index (max)
- 6
- Typical sun hours
- 07:18 – 19:08
Rain & Snow
- Total
-
- Rainy days
- 17
- Cloud cover
- 63%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 82%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is September a good time to visit Hamilton?
Typical September days in Hamilton reach highs of 15°C (59°F) with nights around 7°C (45°F). It usually feels cool by day and cold after dark. Overall, September sits in the middle of the Hamilton climate range.
What are temperatures like in September?
In September, you can usually expect highs of 15°C (59°F) and lows near 7°C (45°F). That means cool days and cold nights, so pack layers you can add or remove.
How much does it rain in September?
Rainfall in September averages 115 mm (4.5 in) across roughly 17 days. Overall it is a very wet time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in September?
You can expect about 12 hours of daylight in September. Sunrise is typically around 07:18 and sunset near 19:08. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in September?
UV levels are often high (around 6). Regular sunscreen and a hat are recommended.
Is it windy in September?
In September, average wind speeds are around 14 km/h (9 mph), with gusts on the windiest days reaching about 64 km/h (40 mph). On the ground, it is it is a notably windy place, and strong gusts are fairly common.