The temperatures in Blenheim in May are quite cold with temperatures between 9°C and 18°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Blenheim. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Blenheim in May 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
18° / 9°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
147
mm
Sun Hours
6.3
Hrs
