The temperatures in Blenheim in September are comfortable with low of 14°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Blenheim during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Blenheim in September 2025.
If you’re planning to visit Blenheim in the near future, we highly recommend that you review the 14 day weather forecast for Blenheim before you arrive.
Temperatures
22° / 14°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
100
mm
Sun Hours
7.5
Hrs
