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 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
Temperature readings reach their annual highs in December, averaging 52.5°F (11.4°C) and a minimum average of 37.6°F (3.1°C).Humidity
In Johannesburg, the average relative humidity in December is 46%.Rainfall
December is the month with the most rainfall in Johannesburg. Rain falls for 2.4 days and accumulates 0.35" (9mm) of precipitation.Snowfall
January through October and December are months without snowfall in Johannesburg.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:41 am and sunset at 4:38 pm. On the last day of December, sunrise is at 6:59 am and sunset at 4:48 pm PST.
Sunshine
The months with the least sunshine in Johannesburg, California, are January and December, with an average of 7.1h of sunshine.UV index
The months with the lowest UV index in Johannesburg are January, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 3 during December, leads to the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. It's recommended to limit sun exposure when its radiation is at its peak during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What month is the coldest in Johannesburg?
What is the average December temperature in Johannesburg?
What is the average humidity in December in Johannesburg?
What is the rainiest month in Johannesburg?
How many days does it rain in December in Johannesburg?
When it does not snow in Johannesburg?
Does it snow in Johannesburg in December?
What is the month with the shortest days in Johannesburg?
How many hours of daylight does Johannesburg have in December?
What time are sunrise and sunset in December in Johannesburg?
What is the month with the least sunshine in Johannesburg?
How many hours of sunshine does Johannesburg have in December?
What is the month with the lowest UV index in Johannesburg?
How high is the UV index in December in Johannesburg?
Average temperature in December
Johannesburg, CA
- Average high temperature in December: 52.5°F
The warmest month (with the highest average high temperature) is July (95.9°F).
The month with the lowest average high temperature is December (52.5°F).
- Average low temperature in December: 37.6°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is December (37.6°F).
Average pressure in December
Johannesburg, CA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in December
Johannesburg, CA
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is May (9.3mph).
The calmest month (with the lowest average wind speed) is January (5.7mph).
Average humidity in December
Johannesburg, CA
- Average humidity in December: 46%
The month with the highest relative humidity is January (47%).
The month with the lowest relative humidity is August (20%).
Average rainfall in December
Johannesburg, CA
- Average rainfall in December: 0.35"
The wettest month (with the highest rainfall) is December (0.35").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Johannesburg, CA
- Average rainfall days in December: 2.4 days
The month with the highest number of rainy days is July (4.5 days).
The month with the least rainy days is June (1.2 days).
Average snowfall in December
Johannesburg, CA
- Average snowfall in December: 0"
The month with the highest snowfall is November (0.83").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and December (0").
Average snowfall days in December
Johannesburg, CA
- Average snowfall days in December: 0.1 days
The months with the highest number of snowfall days are January, February, November and December (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Johannesburg, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 7h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The months with the least sunshine are January and December (Average sunshine: 7h and 6min).
Average sunshine days in December
Johannesburg, CA
- Average sunshine days in December: 28.1 days
The month with the most sunshine days is December (28.1 days).
The month with the least sunshine days is July (23.2 days).
Average UV index in December
Johannesburg, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in December
Johannesburg, CA
- Average cloud cover in December: 17
The months with the most cloud cover are January, March and December (Cloud cover 17).
The month with the least cloud cover is September (Cloud cover 4).
Average visibility in December
Johannesburg, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Johannesburg, California, USA
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