Boise
Idaho, USA
Long-term weather forecast
Long-term weather forecast
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April weather forecast and Climate
Boise, ID

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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
  • The 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).

  • The 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).

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  • The 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%).

  • The 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).

  • The 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).

  • The 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).

  • The 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).

  • The average daylight in April: 13h

Months with the longest days are May, June and July (Average daylight: 15h).
Months with shortest days are January and December (Average daylight: 9h).

  • The 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).

  • The 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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