April weather forecast
Boise, ID

The golden fall season in Boise, Idaho
The golden fall season in Boise, Idaho

Weather in April

April in Boise, Idaho, is a mild spring month, with an average temperature varying between 56.7°F (13.7°C) and 38.1°F (3.4°C).

Temperature

In Boise, the average high-temperature in April slightly increases from a frosty 48.9°F (9.4°C) in March to a moderate 56.7°F (13.7°C). In Boise, the average low-temperature is 38.1°F (3.4°C).

Humidity

In Boise, the average relative humidity in April is 57%.

Rainfall

In Boise, during 13.9 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. Throughout the year, in Boise, there are 116.8 rainfall days, and 15.08" (383mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. April is the last month it regularly snows in Boise. During 0.4 snowfall days, in April, Boise aggregates 0.08" (2mm) of snow. Throughout the year, in Boise, there are 31.4 snowfall days, and 21.3" (541mm) of snow is accumulated.

Daylight

In Boise, the average length of the day in April is 13h and 28min.
On the first day of April in Boise, Idaho, sunrise is at 7:26 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 8:45 pm MDT.

Sunshine

In April, the average sunshine in Boise is 9.5h.

UV index

In Boise, Idaho, the average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: In April, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in April in Boise?

The average high-temperature, in April, is 56.7°F (13.7°C), while the average low-temperature is 38.1°F (3.4°C).

What is the average humidity in April in Boise?

In Boise, Idaho, the average relative humidity in April is 57%.

How much does it rain in Boise in April?

In Boise, Idaho, during April, the rain falls for 13.9 days and regularly aggregates up to 1.3" (33mm) of precipitation.

What is the last month it snows in Boise?

April is the last month it regularly snows. During 0.4 snowfall days, in April, Boise aggregates 0.08" (2mm) of snow.

What is the average length of the day in April in Boise?

In Boise, Idaho, the average day length in April is 13h and 28min.

When is the sunrise / sunset in April in Boise?

In April, on the first day of the month, sunrise is at 7:26 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 8:45 pm MDT.

How many hours of sunshine does Boise have in April?

The average sunshine duration in April in Boise is 9.5h.

What is the UV index intensity in April in Boise?

The average daily maximum UV index in April in Boise is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Boise, ID

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).

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Average pressure in April
Boise, ID

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).

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Average wind speed in April
Boise, ID

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).

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Average humidity in April
Boise, ID

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%).

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Average rainfall in April
Boise, ID

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").

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Average rainfall days in April
Boise, ID

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).

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Average snowfall in April
Boise, ID

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").

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Average snowfall days in April
Boise, ID

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).

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Average daylight in April /
Average sunshine in April
Boise, ID

Average daylight in April / Average sunshine in April - Boise, ID
  • Average daylight in April: 13h and 28min

The month with the longest days is June (Average daylight: 15h and 23min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in April: 9h and 30min

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).

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Average sunshine days in April
Boise, ID

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).

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Average UV index in April
Boise, ID

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).

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Average cloud cover in April
Boise, ID

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).

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Average visibility in April
Boise, ID

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).

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