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 snowfall in December
- Average snowfall days in December
- Average sea temperature 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
December
Weather in December
Temperature
A minor adjustment in Portobello's average high-temperature is noted with the start of December, touching a still mild 14.7°C (58.5°F) from November's 13°C (55.4°F). Portobello's December nights observe a minor shift from the daytime temperatures, resulting in an average dip to a cool 10.5°C (50.9°F).Humidity
The months with the highest humidity are March and December, with an average relative humidity of 80%.Rainfall
In December, in Portobello, the rain falls for 14 days. Throughout December, 34mm (1.34") of precipitation is accumulated. Throughout the year, there are 150.6 rainfall days, and 357mm (14.06") of precipitation is accumulated.Snowfall
In Portobello, snow does not fall in January through July, September through December.Sea temperature
In Portobello, the average seawater temperature in December is 12.7°C (54.9°F).Note: Without suitable protection, venturing into 12.7°C (54.9°F) waters cooler than 10°C (50°F) can lead to pronounced cold shock and rapid breaths.
Daylight
The month with the longest days in Portobello, New Zealand, is December, with an average of 15h and 42min of daylight.On the first day of December in Portobello, sunrise is at 5:43 am and sunset at 9:09 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 9:30 pm NZDT.
Sunshine
December has the most sunshine of the year in Portobello, with an average of 10.6h of sunshine.UV index
The months with the highest UV index in Portobello are January through March, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 4 in December translates into this advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Portobello in December?
What is the most humid month in Portobello?
What is the average humidity in December in Portobello?
How much does it rain in Portobello in December?
When it does not snow in Portobello?
What is the water temperature in December in Portobello?
When are the longest days in Portobello?
What is the average length of the day in December in Portobello?
When is the sunrise / sunset in December in Portobello?
What month has the most sunshine in Portobello?
How many hours of sunshine does Portobello have in December?
When is the highest UV index in Portobello?
What is the UV index reading in December in Portobello?
Average temperature in December
Portobello, New Zealand
- Average high temperature in December: 14.7°C
The warmest month (with the highest average high temperature) is February (15.8°C).
The month with the lowest average high temperature is July (9.2°C).
- Average low temperature in December: 10.5°C
The month with the highest average low temperature is February (11.7°C).
The coldest month (with the lowest average low temperature) is July (6.3°C).
Average pressure in December
Portobello, New Zealand
- Average pressure in December: 1010.9mbar
The month with the highest atmospheric pressure is March (1016.2mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in December
Portobello, New Zealand
- Average wind speed in December: 19.6km/h
The windiest month (with the highest average wind speed) is June (21.8km/h).
The calmest month (with the lowest average wind speed) is February (18.4km/h).
Average humidity in December
Portobello, New Zealand
- Average humidity in December: 80%
The months with the highest relative humidity are March and December (80%).
The month with the lowest relative humidity is July (76%).
Average rainfall in December
Portobello, New Zealand
- Average rainfall in December: 34mm
The wettest month (with the highest rainfall) is February (43mm).
The driest month (with the least rainfall) is September (16mm).
Average rainfall days in December
Portobello, New Zealand
- Average rainfall days in December: 14 days
The month with the highest number of rainy days is October (15.6 days).
The month with the least rainy days is March (11.1 days).
Average snowfall in December
Portobello, New Zealand
- Average snowfall in December: 0mm
The month with the highest snowfall is August (3mm).
The months with the least snowfall are January, February, March, April, May, June, July, September, October, November and December (0mm).
Average snowfall days in December
Portobello, New Zealand
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is August (0.7 days).
The months with the least snowfall days are January, February, March, April, May, October and December (0 days).
Average sea temperature in December
Portobello, New Zealand
- Average sea temperature in December: 12.7°C
The best month for swimming (with the highest average sea temperature) is February (13.8°C).
The coldest month (with the lowest average sea temperature) is August (9.2°C).
Average daylight in December /
Average sunshine in December
Portobello, New Zealand
- Average daylight in December: 15h and 4min
The month with the longest days is December (Average daylight: 15h and 42min).
The month with the shortest days is June (Average daylight: 8h and 42min).
- Average sunshine in December: 10h and 4min
The month with the most sunshine is December (Average sunshine: 10h and 36min).
The month with the least sunshine is June (Average sunshine: 4h and 30min).
Average sunshine days in December
Portobello, New Zealand
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is March (17.9 days).
The month with the least sunshine days is January (13.4 days).
Average UV index in December
Portobello, New Zealand
- Average UV index in December: 4
The months with the highest UV index are January, February, March, November and December (UV index 4).
The months with the lowest UV index are April, May, June, July, August, September and October (UV index 3).
Average cloud cover in December
Portobello, New Zealand
- Average cloud cover in December: 44
The month with the most cloud cover is January (Cloud cover 45).
The month with the least cloud cover is March (Cloud cover 40).
Average visibility in December
Portobello, 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).
