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
December begins with an average high-temperature of a still pleasant 21.5°C (70.7°F), reflecting close similarity to the preceding month. The December nights in Longwood show a slight decrease to a mean low-temperature of 20.2°C (68.4°F).Humidity
In Longwood, the average relative humidity in December is 80%.Rainfall
In December, the rain falls for 11.2 days. Throughout December, 7mm (0.28") of precipitation is accumulated. Throughout the year, in Longwood, there are 133.1 rainfall days, and 92mm (3.62") of precipitation is accumulated.Daylight
December has the longest days of the year, with an average of 13h and 6min of daylight.On the first day of December in Longwood, sunrise is at 05:41 and sunset at 18:42. On the last day of the month, sunrise is at 05:54 and sunset at 18:57 GMT.
Sunshine
In Longwood, the average sunshine in December is 6.8h.UV index
In December, the average daily maximum UV index in Longwood is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: During December, 5 as the daily maximum UV index converts into the following advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What are the temperatures in Longwood in December?
What is the average humidity in December in Longwood?
How many days does it rain in December in Longwood?
When are the longest days in Longwood?
What is the average length of the day in December in Longwood?
When is the sunrise / sunset in December in Longwood?
How many hours of sunshine does Longwood have in December?
How high is the UV index in December in Longwood?
Average temperature in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average high temperature in December: 21.5°C
The warmest month (with the highest average high temperature) is March (24.7°C).
The month with the lowest average high temperature is September (19.7°C).
- Average low temperature in December: 20.2°C
The month with the highest average low temperature is March (23.5°C).
The coldest months (with the lowest average low temperature) are September and October (18.7°C).
Average pressure in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average pressure in December: 1015.7mbar
The months with the highest atmospheric pressure are July and August (1019.8mbar).
The month with the lowest atmospheric pressure is February (1014.1mbar).
Average wind speed in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average wind speed in December: 23.2km/h
The windiest month (with the highest average wind speed) is September (28.4km/h).
The calmest month (with the lowest average wind speed) is January (21.8km/h).
Average humidity in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average humidity in December: 80%
The month with the highest relative humidity is October (82%).
The months with the lowest relative humidity are June and July (74%).
Average rainfall in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average rainfall in December: 7mm
The wettest month (with the highest rainfall) is June (11mm).
The driest months (with the least rainfall) are May, September, October and November (6mm).
Average rainfall days in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is June (13.6 days).
The month with the least rainy days is November (8.5 days).
Average daylight in December /
Average sunshine in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average daylight in December: 13h and 1min
The month with the longest days is December (Average daylight: 13h and 6min).
The month with the shortest days is June (Average daylight: 11h and 12min).
- Average sunshine in December: 6h and 5min
The month with the most sunshine is February (Average sunshine: 7h and 30min).
The month with the least sunshine is September (Average sunshine: 4h and 0min).
Average sunshine days in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is May (13.2 days).
The month with the least sunshine days is February (7.2 days).
Average UV index in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average UV index in December: 5
The months with the highest UV index are January, February, March and May (UV index 6).
The months with the lowest UV index are August, September and October (UV index 4).
Average cloud cover in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- Average cloud cover in December: 60
The month with the most cloud cover is September (Cloud cover 74).
The month with the least cloud cover is February (Cloud cover 44).
Average visibility in December
Longwood, Saint Helena, Ascension and Tristan da Cunha
- 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).
Longwood, Saint Helena, Ascension and Tristan da Cunha
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