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 arrival sees a rise in the average high-temperature, jumping from March's comfortable 64°F (17.8°C) to a moderately hot 73.9°F (23.3°C). An average low-temperature of 54.9°F (12.7°C) is anticipated throughout the nights in Johnston during April.Humidity
In Johnston, the average relative humidity in April is 73%.Rainfall
In Johnston, in April, it is raining for 12.8 days, with typically 2.8" (71mm) of accumulated precipitation. In Johnston, during the entire year, the rain falls for 149.8 days and collects up to 28.58" (726mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in April in Johnston is 13h and 3min.On the first day of April, sunrise is at 7:13 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 8:10 pm EDT.
Sunshine
In April, the average sunshine in Johnston, South Carolina, is 9.2h.UV index
The average daily maximum UV index in April is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In April, the average maximum UV index of 6 translates into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Frequently asked questions
What is the average April temperature in Johnston?
What is the average humidity in April in Johnston?
How much does it rain in Johnston in April?
When it does not snow in Johnston?
Does it snow in Johnston in April?
What is the average length of the day in April in Johnston?
When are sunrise and sunset in April in Johnston?
How long on average sun shines in April in Johnston?
What is the UV index intensity in April in Johnston?
Average temperature in April
Johnston, SC
- Average high temperature in April: 73.9°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (52.7°F).
- Average low temperature in April: 54.9°F
The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in April
Johnston, SC
- Average pressure in April: 30.02"Hg
The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in April
Johnston, SC
- Average wind speed in April: 8.1mph
The windiest months (with the highest average wind speed) are February and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in April
Johnston, SC
- Average humidity in April: 73%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in April
Johnston, SC
- Average rainfall in April: 2.8"
The wettest month (with the highest rainfall) is December (3.03").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in April
Johnston, SC
- Average rainfall days in April: 12.8 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is November (7.8 days).
Average snowfall in April
Johnston, SC
- Average snowfall in April: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in April
Johnston, SC
- Average snowfall days in April: 0 days
The months with the highest number of snowfall days are January and February (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Johnston, SC
- Average daylight in April: 13h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in April: 9h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in April
Johnston, SC
- Average sunshine days in April: 15.8 days
The month with the most sunshine days is October (21.8 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in April
Johnston, SC
- Average UV index in April: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in April
Johnston, SC
- Average cloud cover in April: 32
The month with the most cloud cover is December (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in April
Johnston, SC
- 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, South Carolina, USA
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