Boise
Idaho, USA
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Boise, ID

The golden fall season in Boise, Idaho, with the tall city buildings
The golden fall season in Boise, Idaho, with the tall city buildings
April in Boise, Idaho, is an enjoyable spring month, with average temperature fluctuating between 62.2°F (16.8°C) and 39.4°F (4.1°C).

Temperature

In April, the average high-temperature slightly increases, from a fresh 54.7°F (12.6°C) in March, to a comfortable 62.2°F (16.8°C). The average low-temperature, in Boise, is 39.4°F (4.1°C).

Humidity

In Boise, the average relative humidity is 52.3%.

Rainfall

In Boise, in April, it is raining for 8.8 days, with typically 1.2" (31.2mm) of accumulated precipitation. In Boise, during the entire year, the rain falls for 87.6 days and collects up to 11.7" (297.9mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Boise.

Daylight

The average length of the day in Boise is 13.5h.

Sunshine

The average sunshine in Boise is 9.4h.

UV index

In April, the average daily maximum UV index in Boise is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to the UV radiation for the average person.
The daily maximum UV index of 6 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for 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.

What is the temperature in April in Boise?

In April, the average high-temperature is 62.2°F (16.8°C), and the average low-temperature is 39.4°F (4.1°C).

What is the average humidity in April in Boise?

In April, the average relative humidity in Boise is 52.3%.

How much does it rain in Boise in April?

In Boise, Idaho, in April, during 8.8 rainfall days, 1.2" (31.2mm) of precipitation is typically accumulated.

What is the last month it snows in Boise?

April is the last month it regularly snows in Boise. During 0.4 snowfall days, in April, Boise aggregates 0.3" (7.6mm) of snow.

How many hours of daylight does Boise have in April?

In Boise, Idaho, the average length of the day in April is 13.5h.

How long on average sun shines in April in Boise?

The average sunshine in April is 9.4h.

What is the UV index intensity in April in Boise?

The average daily maximum UV index in April is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in April - Boise, ID
  • Average high temperature in April: 62.3°F

The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is December (37.5°F).

  • Average low temperature in April: 39.3°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (24°F).

Average humidity in April - Boise, ID
  • Average humidity in April: 52.3%

The month with the highest relative humidity is January (75%).
The month with the lowest relative humidity is July (36.1%).

Average rainfall in April - Boise, ID
  • Average rainfall in April: 1.2"

The wettest month (with the highest rainfall) is December (1.6").
The driest month (with the lowest rainfall) is August (0.2").

Average rainfall days in April - Boise, ID
  • Average rainfall days in April: 8.8 days

The month with the highest number of rainy days is December (11.8 days).
The month with the lowest number of rainy days is August (2.4 days).

Average snowfall in April - Boise, ID
  • Average snowfall in April: 0.3"

The month with the highest snowfall is December (7").
Months with the lowest snowfall are May, June, July, August and September (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 (6 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average daylight in April / Average sunshine in April - Boise, ID
  • Average daylight in April: 13.5h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in April: 9.4h

The month with most sunshine is July (Average sunshine: 12.9h).
The month with least sunshine is December (Average sunshine: 3.4h).

Average UV index in April - Boise, ID
  • Average UV index in April: 6

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).