Blenheim Weather in May
Blenheim in May averages 15°C (59°F) during the day and 7°C (45°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Blenheim in May
Typically, you can expect about 9 days of rain this month, with 70 mm (2.8 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Blenheim in May
Daytime highs in Blenheim in May reach 15°C (59°F), with nights around 7°C (45°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 7°C (45°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Blenheim in May
You can expect a moderate amount of sunlight, with approximately 176 hours. This means a pleasant mix of sun and overcast.For Blenheim itself, January, February, March and December generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Blenheim's climate page.
Blenheim Temperature in May
Min Temperature
7°C (45°F)
Max Temperature
15°C (59°F)
Chance of Rain
29%
Precipitation
70 mm (2.8 in)
Rainy days
9 days
Humidity
88% *
Sunshine
176 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Blenheim typically stay consistent throughout May, with daily highs averaging around 15°C (59°F). Nights are cool, with lows typically ranging from 8°C (46°F) to 10°C (50°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Blenheim in May
Browse day-by-day weather records for Blenheim spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Blenheim historical weather extremes in May
Based on 50 years of weather observations in Blenheim between 1976 and 2026, these are the recorded extremes.
- On May 6, 2001, temperatures climbed to 21°C (70°F), marking the warmest May day on record.
- Blenheim experienced its chilliest May day on May 23, 1979, reaching only 8°C (46°F).
- Nighttime temperatures dropped to 1°C (34°F) on May 31, 1992, marking the coldest May night on record.
Best Places in New Zealand in May
Find out more about the weather in New Zealand and which places have the best travel conditions in this month. See all of New Zealand in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Blenheim in May
The weather can be unpredictable in May, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Rain is likely on several days, so bring a good rain jacket. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Blenheim in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Blenheim's climate page.
Temperature Rainfall Sunshine Humidity
See the full Blenheim climate overview or explore weather in New Zealand.
