Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The shift into December uncovers an average high-temperature of a pleasant 20.3°C (68.5°F), subtly different from the previous month. The temperature in Saint Heliers during December experiences a small drop from daytime peaks, recording an average of 15.5°C (59.9°F) at night.Humidity
In December, the average relative humidity in Saint Heliers is 78%.Rainfall
In December, the rain falls for 14.5 days. Throughout December, 57mm (2.24") of precipitation is accumulated. In Saint Heliers, during the entire year, the rain falls for 186.5 days and collects up to 625mm (24.61") of precipitation.Daylight
The month with the longest days is December, with an average of 14h and 36min of daylight.On the first day of the month, sunrise is at 5:54 am and sunset at 8:24 pm. On the last day of December, sunrise is at 6:04 am and sunset at 8:42 pm NZDT.
Sunshine
The month with the most sunshine is December, with an average of 8.3h of sunshine.UV index
January through April and December, with an average maximum UV index of 5, are months with the highest UV index in Saint Heliers, New Zealand. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 5 during December leads to these advisories:
Take precautions - Protection against skin and eye damage is obliged. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What are December temperatures in Saint Heliers?
What is the average humidity in December in Saint Heliers?
How many days does it rain in December in Saint Heliers?
When are the longest days in Saint Heliers?
How many hours of daylight does Saint Heliers have in December?
When are sunrise and sunset in December in Saint Heliers?
What month has the most sunshine in Saint Heliers?
How many hours of sunshine does Saint Heliers have in December?
When is the highest UV index in Saint Heliers?
How high is the UV index in December in Saint Heliers?
Average temperature in December
Saint Heliers, New Zealand
- Average high temperature in December: 20.3°C
The warmest month (with the highest average high temperature) is February (22.6°C).
The month with the lowest average high temperature is July (13.8°C).
- Average low temperature in December: 15.5°C
The month with the highest average low temperature is February (17.5°C).
The coldest month (with the lowest average low temperature) is July (10.4°C).
Average pressure in December
Saint Heliers, New Zealand
- Average pressure in December: 1015.5mbar
The month with the highest atmospheric pressure is March (1018.3mbar).
The months with the lowest atmospheric pressure are January and September (1014.8mbar).
Average wind speed in December
Saint Heliers, New Zealand
- Average wind speed in December: 15.3km/h
The windiest month (with the highest average wind speed) is September (19km/h).
The calmest month (with the lowest average wind speed) is February (13.9km/h).
Average humidity in December
Saint Heliers, New Zealand
- Average humidity in December: 78%
The months with the highest relative humidity are August and September (79%).
The months with the lowest relative humidity are January, February, March and November (77%).
Average rainfall in December
Saint Heliers, New Zealand
- Average rainfall in December: 57mm
The wettest month (with the highest rainfall) is June (71mm).
The driest month (with the least rainfall) is January (34mm).
Average rainfall days in December
Saint Heliers, New Zealand
- Average rainfall days in December: 14.5 days
The month with the highest number of rainy days is August (18.9 days).
The month with the least rainy days is January (11.1 days).
Average daylight in December /
Average sunshine in December
Saint Heliers, New Zealand
- Average daylight in December: 14h and 4min
The month with the longest days is December (Average daylight: 14h and 36min).
The month with the shortest days is June (Average daylight: 9h and 42min).
- Average sunshine in December: 8h and 2min
The month with the most sunshine is December (Average sunshine: 8h and 18min).
The month with the least sunshine is August (Average sunshine: 6h and 24min).
Average sunshine days in December
Saint Heliers, New Zealand
- Average sunshine days in December: 11.7 days
The month with the most sunshine days is January (16.3 days).
The month with the least sunshine days is September (7.7 days).
Average UV index in December
Saint Heliers, New Zealand
- Average UV index in December: 5
The months with the highest UV index are January, February, March, April and December (UV index 5).
The month with the lowest UV index is June (UV index 3).
Average cloud cover in December
Saint Heliers, New Zealand
- Average cloud cover in December: 43
The month with the most cloud cover is September (Cloud cover 49).
The month with the least cloud cover is January (Cloud cover 37).
Average visibility in December
Saint Heliers, New Zealand
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Saint Heliers, New Zealand
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