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
The advent of April brings an average high-temperature of a pleasant 70.5°F (21.4°C), exhibiting minor difference from the previous month. Nighttime temperatures consistently average a frosty 49.5°F (9.7°C) during April.Humidity
In Johnstown, 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 April, sunrise is at 6:34 am and sunset at 7:08 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:29 pm PDT.
Sunshine
In Johnstown, the average sunshine in April is 11.1h.UV index
The average daily maximum UV index in April is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily high UV index of 5 in April leads to these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What are April temperatures in Johnstown?
What is the average humidity in April in Johnstown?
How many days does it rain in April in Johnstown?
What is the average length of the day in April in Johnstown?
When are sunrise and sunset in April in Johnstown?
How long on average sun shines in April in Johnstown?
How high is the UV index in April in Johnstown?
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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