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 arrival of April brings a change in Riley's weather, with average high-temperatures moving from March's moderate 55.6°F (13.1°C) to a still refreshing 64.9°F (18.3°C). April nights in Riley observe an average temperature dip to a frosty 45.5°F (7.5°C).Humidity
In Riley, the average relative humidity in April is 67%.Rainfall
In April, the rain falls for 12.5 days. Throughout April, 1.65" (42mm) of precipitation is accumulated. In Riley, during the entire year, the rain falls for 114.8 days and collects up to 21.1" (536mm) of precipitation.Snowfall
Months with snowfall in Riley, Kansas, are January through April, October through December. April is the last month it regularly snows in Riley. During 0.4 snowfall days, in April, Riley aggregates 0.12" (3mm) of snow. In Riley, during the entire year, snow falls for 17.5 days and aggregates up to 7.32" (186mm) of snow.Daylight
In Riley, the average length of the day in April is 13h and 16min.On the first day of April in Riley, sunrise is at 7:10 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 8:20 pm CDT.
Sunshine
In April, the average sunshine is 8.7h.UV index
In April, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In April, the maximum UV index of 4 suggests this advice:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures in Riley?
What is the average humidity in April in Riley?
How many days does it rain in April in Riley?
What is the last month it snows in Riley?
How many hours of daylight does Riley have in April?
When are sunrise and sunset in April in Riley?
How long on average sun shines in April in Riley?
What is the UV index reading in April in Riley?
Average temperature in April
Riley, KS
- Average high temperature in April: 64.9°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in April: 45.5°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in April
Riley, KS
- Average pressure in April: 29.9"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in April
Riley, KS
- Average wind speed in April: 11.8mph
The windiest month (with the highest average wind speed) is April (11.8mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).
Average humidity in April
Riley, KS
- Average humidity in April: 67%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is October (64%).
Average rainfall in April
Riley, KS
- Average rainfall in April: 1.65"
The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in April
Riley, KS
- Average rainfall days in April: 12.5 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in April
Riley, KS
- Average snowfall in April: 0.12"
The month with the highest snowfall is February (2.24").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Riley, KS
- Average snowfall days in April: 0.4 days
The month with the highest number of snowfall days is February (4.8 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
Riley, KS
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in April: 8h and 4min
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 42min).
Average sunshine days in April
Riley, KS
- Average sunshine days in April: 16.3 days
The month with the most sunshine days is January (23.5 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in April
Riley, KS
- Average UV index in April: 4
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Riley, KS
- Average cloud cover in April: 36
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 22).
Average visibility in April
Riley, KS
- 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).
Riley, Kansas, USA
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