Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
April's onset is marked by a subtle temperature increase, moving from an enjoyable 63.7°F (17.6°C) in March to an agreeable 70.7°F (21.5°C). During April, Johannesburg records an average temperature of 50.4°F (10.2°C) at night.Humidity
The average relative humidity in April is 32%.Rainfall
In Johannesburg, in April, it is raining for 3 days, with typically 0.31" (8mm) of accumulated precipitation. Throughout the year, there are 29.6 rainfall days, and 2.64" (67mm) of precipitation is accumulated.Snowfall
In Johannesburg, snow does not fall in January through October and December.Daylight
In Johannesburg, the average length of the day in April is 13h and 7min.On the first day of April, sunrise is at 6:35 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 7:36 pm PDT.
Sunshine
The average sunshine in April is 11.6h.UV index
The average daily maximum UV index in April is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 5 in April converts into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Johannesburg in April?
What is the average humidity in April?
How many days does it rain in April?
When it does not snow?
What is the average length of the day in April?
When is the sunrise / sunset in April?
How long on average sun shines in April?
How high is the UV index in April?
Average temperature in April
Johannesburg, CA
- Average high temperature in April: 70.7°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 April: 50.4°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 April
Johannesburg, CA
- Average pressure in April: 29.92"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 April
Johannesburg, CA
- Average wind speed in April: 8.9mph
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 April
Johannesburg, CA
- Average humidity in April: 32%
The month with the highest relative humidity is January (47%).
The month with the lowest relative humidity is August (20%).
Average rainfall in April
Johannesburg, CA
- Average rainfall in April: 0.31"
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 April
Johannesburg, CA
- Average rainfall days in April: 3 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 April
Johannesburg, CA
- Average snowfall in April: 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 April
Johannesburg, CA
- Average snowfall days in April: 0 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 April /
Average sunshine in April
Johannesburg, CA
- Average daylight in April: 13h 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 April: 11h and 4min
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 April
Johannesburg, CA
- Average sunshine days in April: 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 April
Johannesburg, CA
- Average UV index in April: 5
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 April
Johannesburg, CA
- Average cloud cover in April: 12
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 April
Johannesburg, CA
- Average visibility in April: 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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