May weather forecast
Christchurch, New Zealand

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Weather in May

In May, Christchurch experiences a distinct change in the weather, with the advent of winter. Average temperatures decrease markedly from April, both during the day and at night. Rainfall maintains a similar level compared to April, but the number of rainy days reduces to 8. Surprisingly, the daylight hours continue to decrease, reducing to an average of 9.7 hours, and the winds display an increase in speed. May is characterized by a relative humidity of 78%, which is notably higher than the previous month.

Temperature

May welcomes an average high-temperature of a mild 13.6°C (56.5°F), not much different from the preceding month. The average temperature in Christchurch drops to a chilly 6.4°C (43.5°F) during the night in the month of May.

Humidity

The average relative humidity in May in Christchurch, New Zealand, is 78%.

Rainfall

In Christchurch, New Zealand, in May, it is raining for 8 days, with typically 21mm (0.83") of accumulated precipitation. Throughout the year, there are 114.3 rainfall days, and 300mm (11.81") of precipitation is accumulated.

Snowfall

January through May, October through December are months without snowfall in Christchurch.

Sea temperature

In Christchurch, the average seawater temperature in May is 12.3°C (54.1°F).
Note: In 12.3°C (54.1°F), cold shock and rapid breathing can occur when swimming at temperatures below 10°C (50°F).

Daylight

In May, the average length of the day in Christchurch is 9h and 39min.
On the first day of May, sunrise is at 7:21 am and sunset at 5:31 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 5:02 pm NZST.

Sunshine

In Christchurch, the average sunshine in May is 7.5h.

UV index

April through September, with an average maximum UV index of 3, are months with the lowest UV index in Christchurch. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: During May, 3 as the daily maximum UV index converts into the following advice:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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Frequently asked questions

What is the average May temperature in Christchurch?

In May, the average high-temperature and low-temperature in Christchurch are 13.6°C (56.5°F) and 6.4°C (43.5°F) respectively.

What is the average humidity in May in Christchurch?

In May, the average relative humidity is 78%.

How many days does it rain in May in Christchurch?

In Christchurch, New Zealand, in May, it is raining for 8 days, with typically 21mm (0.83") of accumulated precipitation.

When it does not snow in Christchurch?

January through May, October through December are months without snowfall in Christchurch, New Zealand.

Does it snow in Christchurch in May?

In Christchurch, in May, it doesn't snow. In June, it regularly snows.

What is the sea water temperature in May in Christchurch?

In Christchurch, New Zealand, the average seawater temperature in May is 12.3°C (54.1°F). Swimming in 12.3°C (54.1°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in May in Christchurch?

In Christchurch, the average day length in May is 9h and 39min.

What time are sunrise and sunset in May in Christchurch?

In May, on the first day of the month, sunrise is at 7:21 am and sunset at 5:31 pm. On the last day of the month, in Christchurch, New Zealand, sunrise is at 7:51 am and sunset at 5:02 pm NZST.

How many hours of sunshine does Christchurch have in May?

In May, the average sunshine duration in Christchurch is 7.5h.

When is the lowest UV index in Christchurch?

April through September, with an average maximum UV index of 3, are months with the lowest UV index in Christchurch, New Zealand.

How high is the UV index in May in Christchurch?

The average daily maximum UV index in May in Christchurch, New Zealand, is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in May
Christchurch, New Zealand

Average temperature in May - Christchurch, New Zealand
  • Average high temperature in May: 13.6°C

The warmest month (with the highest average high temperature) is January (21.3°C).
The month with the lowest average high temperature is July (10.3°C).

  • Average low temperature in May: 6.4°C

The month with the highest average low temperature is January (11.9°C).
The coldest month (with the lowest average low temperature) is July (3.8°C).

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Average pressure in May
Christchurch, New Zealand

Average pressure in May - Christchurch, New Zealand
  • Average pressure in May: 1012.8mbar

The month with the highest atmospheric pressure is March (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).

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Average wind speed in May
Christchurch, New Zealand

Average wind speed in May - Christchurch, New Zealand
  • Average wind speed in May: 13.4km/h

The windiest month (with the highest average wind speed) is January (15.3km/h).
The calmest month (with the lowest average wind speed) is August (12.4km/h).

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Average humidity in May
Christchurch, New Zealand

Average humidity in May - Christchurch, New Zealand
  • Average humidity in May: 78%

The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is January (70%).

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Average rainfall in May
Christchurch, New Zealand

Average rainfall in May - Christchurch, New Zealand
  • Average rainfall in May: 21mm

The wettest month (with the highest rainfall) is October (38mm).
The driest month (with the least rainfall) is September (14mm).

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Average rainfall days in May
Christchurch, New Zealand

Average rainfall days in May - Christchurch, New Zealand
  • Average rainfall days in May: 8 days

The month with the highest number of rainy days is October (12.5 days).
The month with the least rainy days is May (8 days).

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Average snowfall in May
Christchurch, New Zealand

Average snowfall in May - Christchurch, New Zealand
  • Average snowfall in May: 0mm

The month with the highest snowfall is August (5mm).
The months with the least snowfall are January, February, March, April, May, October, November and December (0mm).

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Average snowfall days in May
Christchurch, New Zealand

Average snowfall days in May - Christchurch, New Zealand
  • Average snowfall days in May: 0.1 days

The months with the highest number of snowfall days are June and August (0.3 days).
The months with the least snowfall days are January, February, March, April, October, November and December (0 days).

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Average sea temperature in May
Christchurch, New Zealand

Average sea temperature in May - Christchurch, New Zealand
  • Average sea temperature in May: 12.3°C

The best month for swimming (with the highest average sea temperature) is February (16.1°C).
The coldest month (with the lowest average sea temperature) is August (9.5°C).

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Average daylight in May /
Average sunshine in May
Christchurch, New Zealand

Average daylight in May / Average sunshine in May - Christchurch, New Zealand
  • Average daylight in May: 9h and 4min

The month with the longest days is December (Average daylight: 15h and 24min).
The month with the shortest days is June (Average daylight: 9h and 0min).

  • Average sunshine in May: 7h and 3min

The month with the most sunshine is December (Average sunshine: 10h and 24min).
The month with the least sunshine is June (Average sunshine: 5h and 6min).

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Average sunshine days in May
Christchurch, New Zealand

Average sunshine days in May - Christchurch, New Zealand
  • Average sunshine days in May: 21.2 days

The month with the most sunshine days is May (21.2 days).
The month with the least sunshine days is November (17.3 days).

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Average UV index in May
Christchurch, New Zealand

Average UV index in May - Christchurch, New Zealand
  • Average UV index in May: 3

The month with the highest UV index is January (UV index 5).
The months with the lowest UV index are April, May, June, July, August and September (UV index 3).

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Average cloud cover in May
Christchurch, New Zealand

Average cloud cover in May - Christchurch, New Zealand
  • Average cloud cover in May: 37

The month with the most cloud cover is June (Cloud cover 43).
The months with the least cloud cover are January, February, March and May (Cloud cover 37).

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Average visibility in May
Christchurch, New Zealand

Average visibility in May - Christchurch, New Zealand
  • Average visibility in May: 9km

The months with the highest visibility are January, February, March, April, June, July and December (10km).
The months with the lowest visibility are May, August, September, October and November (9km).

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Christchurch, New Zealand

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