April weather forecast and climate
Boise, ID

The golden fall season in Boise, Idaho, with the tall city buildings in view
The golden fall season in Boise, Idaho, with the tall city buildings in view

What is the temperature in April in Boise?

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

How many days does it rain in April in Boise?

In Boise, Idaho, in April, during 8.8 rainfall days, typically, 1.2" (31.2mm) of precipitation is 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.
Average temperature in April - Boise, ID
  • Average high temperature in April: 16.8°C

The warmest month (with the highest average high temperature) is July (32.9°C).
The month with the lowest average high temperature is December (3.1°C).

  • Average low temperature in April: 4.1°C

The month with the highest average low temperature is July (15.8°C).
The coldest month (with the lowest average low temperature) is December (-4.4°C).

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: 31.2mm

The wettest month (with the highest rainfall) is December (39.4mm).
The driest month (with the lowest rainfall) is August (6.1mm).

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: 7.6mm

The month with the highest snowfall is December (177.8mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

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).

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