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
A rise in the average high-temperature is observed during April, moving from a cold 34.5°F (1.4°C) in March to a chilly 44.2°F (6.8°C). Nighttime temperature lowers to an average of 25°F (-3.9°C) in April.Humidity
In Alton, the average relative humidity in April is 77%.Rainfall
In Alton, in April, it is raining for 14.7 days, with typically 2.48" (63mm) of accumulated precipitation. Throughout the year, there are 117.5 rainfall days, and 20.24" (514mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. In Alton, in April, during 12.3 snowfall days, 9.65" (245mm) of snow is typically accumulated. Throughout the year, there are 116.1 snowfall days, and 91.14" (2315mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 24min.On the first day of the month, sunrise is at 7:05 am and sunset at 7:50 pm. On the last day of April, sunrise is at 6:20 am and sunset at 8:23 pm MDT.
Sunshine
The average sunshine in April is 9.1h.UV index
The average daily maximum UV index in April is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: A daily high UV index of 2 in April leads to these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during April?
What is the average humidity in April?
How many days does it rain in April?
How many days does it snow in April?
How many hours of daylight does Alton have in April?
When are sunrise and sunset in April?
How many hours of sunshine does Alton have in April?
What is the UV index intensity in April?
Average temperature in April
Alton, ID
- Average high temperature in April: 44.2°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is December (25.2°F).
- Average low temperature in April: 25°F
The month with the highest average low temperature is July (48.9°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in April
Alton, ID
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Alton, ID
- Average wind speed in April: 5.5mph
The windiest month (with the highest average wind speed) is June (5.8mph).
The calmest months (with the lowest average wind speed) are January and December (4.2mph).
Average humidity in April
Alton, ID
- Average humidity in April: 77%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is August (42%).
Average rainfall in April
Alton, ID
- Average rainfall in April: 2.48"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in April
Alton, ID
- Average rainfall days in April: 14.7 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (6 days).
Average snowfall in April
Alton, ID
- Average snowfall in April: 9.65"
The month with the highest snowfall is February (18.39").
The months with the least snowfall are July and August (0").
Average snowfall days in April
Alton, ID
- Average snowfall days in April: 12.3 days
The month with the highest number of snowfall days is December (21.6 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in April /
Average sunshine in April
Alton, ID
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in April: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in April
Alton, ID
- Average sunshine days in April: 7.6 days
The month with the most sunshine days is July (18.8 days).
The month with the least sunshine days is February (6.8 days).
Average UV index in April
Alton, ID
- Average UV index in April: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in April
Alton, ID
- Average cloud cover in April: 39
The month with the most cloud cover is February (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in April
Alton, ID
- Average visibility in April: 5mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Alton, Idaho, USA
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