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 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 registers an average high-temperature of a pleasant 70.5°F (21.4°C), slightly varied from March's 67.6°F (19.8°C). Johnstown's average low-temperature in April is measured at a chilly 49.5°F (9.7°C).Humidity
The average relative humidity in April is 62%.Rainfall
In Johnstown, California, during April, the rain falls for 5.3 days and regularly aggregates up to 0.39" (10mm) of precipitation. Throughout the year, there are 49.6 rainfall days, and 5.16" (131mm) of precipitation is accumulated.Daylight
In Johnstown, the average length of the day in April is 13h and 1min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:08 pm. On the last day of April, sunrise is at 6:00 am and sunset at 7:29 pm PDT.
Sunshine
In April, the average sunshine is 11.1h.UV index
In April, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In April, the maximum UV index of 5 transforms into these recommendations:
Ensure safety - Sun damage prevention is strongly urged. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature?
What is the average humidity in April?
How many days does it rain in April?
How many hours of daylight does Johnstown have in April?
When is the sunrise / sunset in April?
How many hours of sunshine does Johnstown have in April?
What is the UV index intensity in April?
Average temperature in April
Johnstown, CA
- Average high temperature in April: 70.5°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in April: 49.5°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in April
Johnstown, CA
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in April
Johnstown, CA
- Average wind speed in April: 5.3mph
The windiest months (with the highest average wind speed) are April and May (5.3mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.2mph).
Average humidity in April
Johnstown, CA
- Average humidity in April: 62%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).
Average rainfall in April
Johnstown, CA
- Average rainfall in April: 0.39"
The wettest month (with the highest rainfall) is February (1.06").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in April
Johnstown, CA
- Average rainfall days in April: 5.3 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.4 days).
Average daylight in April /
Average sunshine in April
Johnstown, CA
- Average daylight in April: 13h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in April: 11h and 1min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in April
Johnstown, CA
- Average sunshine days in April: 24.1 days
The month with the most sunshine days is June (28 days).
The month with the least sunshine days is July (20.7 days).
Average UV index in April
Johnstown, CA
- Average UV index in April: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in April
Johnstown, CA
- Average cloud cover in April: 19
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in April
Johnstown, 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).
Johnstown, California, USA
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