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 shift into April brings a slight increase in the average high-temperature, moving from a frosty 48.9°F (9.4°C) in March to a refreshing 56.7°F (13.7°C). In April, Boise's temperature tends to fall to an average low of 38.1°F (3.4°C) during the night.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. Throughout the year, there are 116.8 rainfall days, and 15.08" (383mm) of precipitation is accumulated.Snowfall
Months with snowfall 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, 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
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 value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 3 in April translates into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature in Boise?
What is the average humidity in April?
How much does it rain in April?
What is the last month it snows?
What is the average length of the day in April?
When 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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