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
The start of April brings a rise in the average high-temperature, moving from a fresh 55.2°F (12.9°C) in March to a refreshing 66.4°F (19.1°C). The month of April records an average low-temperature of 48.7°F (9.3°C).Humidity
The average relative humidity in April in Johnston City is 77%.Rainfall
April is the month with the most rainfall in Johnston City, Illinois. Rain falls for 16.6 days and accumulates 4.92" (125mm) of precipitation.Snowfall
Months with snowfall in Johnston City are January through April, October through December. April is the last month it regularly snows in Johnston City. During 0.5 snowfall days, in April, Johnston City aggregates 0.12" (3mm) of snow. Throughout the year, there are 19.8 snowfall days, and 6.57" (167mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 12min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:19 pm. On the last day of April, sunrise is at 5:59 am and sunset at 7:45 pm CDT.
Sunshine
The average sunshine in April is 8.6h.UV index
The average daily maximum UV index in April is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A daily high UV index of 5 in April leads to these guidelines:
Take necessary precautions - Defending against sun damage is advocated. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in Johnston City?
What is the average humidity in April in Johnston City?
What is the rainiest month in Johnston City?
How many days does it rain in April in Johnston City?
What is the last month it snows in Johnston City?
What is the average length of the day in April in Johnston City?
When is the sunrise / sunset in April in Johnston City?
How many hours of sunshine does Johnston City have in April?
How high is the UV index in April in Johnston City?
Average temperature in April
Johnston City, IL
- Average high temperature in April: 66.4°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in April: 48.7°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in April
Johnston City, IL
- Average pressure in April: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in April
Johnston City, IL
- Average wind speed in April: 9.4mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in April
Johnston City, IL
- Average humidity in April: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in April
Johnston City, IL
- Average rainfall in April: 4.92"
The wettest month (with the highest rainfall) is April (4.92").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in April
Johnston City, IL
- Average rainfall days in April: 16.6 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in April
Johnston City, IL
- Average snowfall in April: 0.12"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Johnston City, IL
- Average snowfall days in April: 0.5 days
The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Johnston City, IL
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 8h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in April
Johnston City, IL
- Average sunshine days in April: 11.4 days
The month with the most sunshine days is October (17.6 days).
The month with the least sunshine days is June (9.9 days).
Average UV index in April
Johnston City, IL
- Average UV index in April: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in April
Johnston City, IL
- Average cloud cover in April: 41
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in April
Johnston City, IL
- 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).
Johnston City, Illinois, USA
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