Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
The average high-temperature is a still cool 54.9°F (12.7°C) in January, hardly different from the 52.5°F (11.4°C) recorded in December. An average nighttime temperature of 38.8°F (3.8°C) is observed in Johannesburg during January.Humidity
January is the most humid month, with an average relative humidity of 47%.Rainfall
In Johannesburg, in January, during 2.8 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. In Johannesburg, during the entire year, the rain falls for 29.6 days and collects up to 2.64" (67mm) of precipitation.Snowfall
In Johannesburg, snow does not fall in January through October and December.Daylight
In Johannesburg, the average length of the day in January is 10h and 5min.On the first day of January, sunrise is at 6:59 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 5:17 pm PST.
Sunshine
January and December, with an average of 7.1h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In January, the UV index of 3 transforms into the following advice:
Ensure safety - Sun damage prevention is strongly urged. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Johannesburg in January?
What is the most humid month?
What is the average humidity in January?
How many days does it rain in January?
When it does not snow?
What is the average length of the day in January?
What time are sunrise and sunset in January?
What are the months with the least sunshine?
How many hours of sunshine does Johannesburg have in January?
When is the lowest UV index?
How high is the UV index in January?
Average temperature in January
Johannesburg, CA
- Average high temperature in January: 54.9°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 January: 38.8°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 January
Johannesburg, CA
- Average pressure in January: 30.13"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 January
Johannesburg, CA
- Average wind speed in January: 5.7mph
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 January
Johannesburg, CA
- Average humidity in January: 47%
The month with the highest relative humidity is January (47%).
The month with the lowest relative humidity is August (20%).
Average rainfall in January
Johannesburg, CA
- Average rainfall in January: 0.24"
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 January
Johannesburg, CA
- Average rainfall days in January: 2.8 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 January
Johannesburg, CA
- Average snowfall in January: 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 January
Johannesburg, CA
- Average snowfall days in January: 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 January /
Average sunshine in January
Johannesburg, CA
- Average daylight in January: 10h and 1min
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 January: 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 January
Johannesburg, CA
- Average sunshine days in January: 27.3 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 January
Johannesburg, CA
- Average UV index in January: 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 January
Johannesburg, CA
- Average cloud cover in January: 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 January
Johannesburg, CA
- Average visibility in January: 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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