April Weather in Boise, United States

Last updated: June 24, 2025

In Boise, United States, the average temperature in April is a cool 11°C (52°F). Expect a wide range, with minimums dipping to -3°C (27°F) and maximums soaring to 32°C (90°F). During this month, precipitation totals around 36 mm (1.4 in), typically falling over 8 days. Additionally, you'll find the average humidity hovering at a comfortable 79%.

April Temperature in Boise

In April in Boise, the average temperature is 11°C (52°F), with maximums reaching 32°C (90°F) and minimums dropping as low as -3°C (27°F). Travelers should be prepared for a wide range of weather conditions during this time.

April Weather in Boise: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Boise, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boise, April typically has an average temperature of 11°C (52°F), with highs reaching up to 32°C (90°F) and lows dropping to around -3°C (27°F).

Data source: Temperature data for Boise generated using information from the Copernicus Climate Change Service.

April Precipitation in Boise

In Boise in April, the precipitation amount is 36 mm (1.4 in) over a period of 8 days.

April Precipitation Trends in Boise

The chart displays monthly precipitation patterns in Boise, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Boise, April typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Boise

In Boise in April humidity is 79%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that seeps through your clothes, making prolonged outdoor activities uncomfortable for travelers.

April Average Humidity in Boise

This chart illustrates the average monthly humidity levels in Boise, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Boise is approximately 79%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Boise

In Boise in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Boise.

Maximum UV Index Levels in Boise for April

The chart shows the monthly maximum UV Index (UVI) for Boise in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Boise typically reaches 8, which falls under the very high exposure category.

Data source: Boise April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How April Weather in Boise Compares to Other Months

Weather in Boise varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Boise, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Boise, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (33°F)	49 mm (1.9 inches)	88%	moderate
February Weather	2°C (36°F)	50 mm (2.0 inches)	89%	moderate
March Weather	8°C (46°F)	38 mm (1.5 inches)	85%	high
April Weather	11°C (52°F)	36 mm (1.4 inches)	79%	very high
May Weather	16°C (61°F)	39 mm (1.5 inches)	71%	very high
June Weather	21°C (71°F)	21 mm (0.8 inches)	71%	extreme
July Weather	27°C (81°F)	1 mm (0.0 inches)	66%	extreme
August Weather	26°C (78°F)	8 mm (0.3 inches)	50%	very high
September Weather	20°C (68°F)	10 mm (0.4 inches)	48%	very high
October Weather	11°C (53°F)	22 mm (0.9 inches)	65%	high
November Weather	6°C (43°F)	32 mm (1.3 inches)	84%	moderate
December Weather	1°C (34°F)	40 mm (1.6 inches)	87%	low