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
Boise's transition into April brings a slight rise in the average high-temperature, moving from a chilly 48.9°F (9.4°C) in March to a refreshing 56.7°F (13.7°C). The nighttime temperature dips to a cold 38.1°F (3.4°C) on average during April.Humidity
The average relative humidity in April is 57%.Rainfall
In Boise, in April, during 13.9 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. In Boise, during the entire year, the rain falls for 116.8 days and collects up to 15.08" (383mm) of precipitation.Snowfall
Months with snowfall in Boise are January through April, November and December. April is the last month it regularly snows. During 0.4 snowfall days, in April, Boise aggregates 0.08" (2mm) of snow. In Boise, during the entire year, snow falls for 31.4 days and aggregates up to 21.3" (541mm) of snow.Daylight
The average length of the day in April is 13h and 28min.On the first day of April in Boise, sunrise is at 7:24 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 8:46 pm MDT.
Sunshine
In Boise, the average sunshine in April is 9.5h.UV index
In Boise, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 3 in April translates into this advice:
Be vigilant - Suggestions to stave off sun damage are provided. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature?
What is the average humidity in April?
How many days does it rain in April?
What is the last month it snows?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
What is the UV index reading in April?
Average temperature in April
Boise, ID
- Average high temperature in April: 56.7°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is December (34.7°F).
- Average low temperature in April: 38.1°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.2°F).
Average pressure in April
Boise, ID
- Average pressure in April: 29.98"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Boise, ID
- Average wind speed in April: 7.1mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).
Average humidity in April
Boise, ID
- Average humidity in April: 57%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (30%).
Average rainfall in April
Boise, ID
- Average rainfall in April: 1.3"
The wettest month (with the highest rainfall) is March (2.2").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in April
Boise, ID
- Average rainfall days in April: 13.9 days
The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is July (4.5 days).
Average snowfall in April
Boise, ID
- Average snowfall in April: 0.08"
The month with the highest snowfall is December (6.65").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Boise, ID
- Average snowfall days in April: 0.4 days
The month with the highest number of snowfall days is December (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Boise, ID
- Average daylight in April: 13h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in April: 9h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in April
Boise, ID
- Average sunshine days in April: 14.3 days
The month with the most sunshine days is July (23.6 days).
The month with the least sunshine days is March (12.1 days).
Average UV index in April
Boise, ID
- Average UV index in April: 3
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Boise, ID
- Average cloud cover in April: 30
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in April
Boise, ID
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Boise, Idaho, USA
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