Blenheim Weather in May
What's the weather like in Blenheim (Marlborough) in May 2025?
The climate in Blenheim during May can be summarized as cool and a little damp.
May is in the fall / autumn in Blenheim and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 15°C (58°F), whilst at night 4°C (39°F) is normal.
| Daytime temperature | 14.7°C 58.4°F |
|---|---|
| Nightly temperature | 4°C 39.1°F |
| Average temperature | 9.3°C 48.7°F |
| Daily sunshine | 5.4 hrs |
| Avg rainfall | 82 mm 3.2 ins |
| Rainy days | 9 days |
| Sea temperature | 14.8°C 58.6°F |
| Humidity | 81% |
| Windspeed | 15.1kph 9 mph |
On average May is the 4th wettest month of the year in Blenheim with around 82mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.4 hours of sunshine per day.
May temperatures in Blenheim
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Blenheim in May 2025.
Other monthly averages
Blenheim weather stats
| Hottest month: | January | 23.3°C 73.9°F |
|---|---|---|
| Driest month: | February | 43mm 1.7ins |
| Sunniest month: | February | 8.2hrs |
| Coldest month: | July | 11.2°C 52.2°F |
| Wettest month: | August | 95mm 3.7ins |
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