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 beginning of April signals a rise in the average high-temperature, moving from a frosty 46°F (7.8°C) in March to a mild 58.1°F (14.5°C). During April nights, Harlan records an average temperature of 41.7°F (5.4°C).Humidity
In April, the average relative humidity is 76%.Rainfall
In April, the rain falls for 14 days. Throughout April, 1.93" (49mm) of precipitation is accumulated. In Harlan, during the entire year, the rain falls for 140.8 days and collects up to 16.22" (412mm) of precipitation.Snowfall
Months with snowfall in Harlan are January through May, October through December. In Harlan, in April, snow falls for 1.6 days, with typically accumulated 0.59" (15mm) of snow. Throughout the year, in Harlan, there are 45.1 snowfall days, and 7.8" (198mm) of snow is accumulated.Daylight
In April, the average length of the day in Harlan is 13h and 21min.On the first day of the month, sunrise is at 7:21 am and sunset at 8:05 pm. On the last day of April, sunrise is at 6:37 am and sunset at 8:36 pm EDT.
Sunshine
In April, the average sunshine in Harlan is 7h.UV index
The average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In April, the maximum UV index of 4 suggests this advice:
Put precautions into practice - Guidance to elude sunburn is provided. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures in Harlan?
What is the average humidity in April in Harlan?
How many days does it rain in April in Harlan?
How much does it snow in Harlan in April?
How many hours of daylight does Harlan have in April?
When are sunrise and sunset in April in Harlan?
How long on average sun shines in April in Harlan?
What is the UV index reading in April in Harlan?
Average temperature in April
Harlan, IN
- Average high temperature in April: 58.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in April: 41.7°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in April
Harlan, IN
- Average pressure in April: 29.96"Hg
The months with the highest atmospheric pressure are January and November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Harlan, IN
- Average wind speed in April: 10mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in April
Harlan, IN
- Average humidity in April: 76%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall in April
Harlan, IN
- Average rainfall in April: 1.93"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is February (0.87").
Average rainfall days in April
Harlan, IN
- Average rainfall days in April: 14 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (6.5 days).
Average snowfall in April
Harlan, IN
- Average snowfall in April: 0.59"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Harlan, IN
- Average snowfall days in April: 1.6 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Harlan, IN
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 7h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in April
Harlan, IN
- Average sunshine days in April: 12.8 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in April
Harlan, IN
- Average UV index in April: 4
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Harlan, IN
- Average cloud cover in April: 49
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in April
Harlan, IN
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Harlan, Indiana, USA
Weather forecast for your location
2. Allow the app to use your location