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April Weather in Boise City, United States

Last updated: June 24, 2025

In April, the average temperature in Boise City, United States hovers around 13°C (55°F). Be prepared for a range, as temperatures can dip as low as -7°C (20°F) or soar up to a sweltering 32°C (90°F). Expect 41 mm (1.6 in) of precipitation spread over 6 days, and enjoy a moderate average humidity of 61%.

April Temperature in Boise City

In April in Boise City, the average temperature is 13°C (55°F). The maximum can reach 32°C (90°F) and the minimum can be as low as -7°C (20°F). Be sure to pack for varying temperatures if you're planning to visit during this time!

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

The chart illustrates April temperature patterns in Boise City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boise City, April typically has an average temperature of 13°C (55°F), with highs reaching up to 32°C (90°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec363748556475797671564739
Data source: Temperature data for Boise City generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Boise City

In Boise City in April, the precipitation amount is 41 mm (1.6 in) over the course of 6 days.

April Precipitation Trends in Boise City

The chart displays monthly precipitation patterns in Boise City, 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 City, April typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec16113641603744553234715
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Boise City

In Boise City in April, humidity is 61%. With an average temperature of 13°C (55°F), this humidity feels like a crisp, invigorating embrace that can make traveling quite refreshing, but it may also feel a bit chilly, especially during the evenings, so layering your clothing is advisable to stay comfortable while exploring.

April Average Humidity in Boise City

This chart illustrates the average monthly humidity levels in Boise City, 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 City is approximately 61%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%76%64%61%71%75%75%80%80%78%76%78%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Boise City

In Boise City in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Boise City.

Maximum UV Index Levels in Boise City for April

The chart shows the monthly maximum UV Index (UVI) for Boise City 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 City typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110753
Data source: Boise City 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 City Compares to Other Months

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

This table compares monthly weather conditions in Boise City, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)16 mm (0.6 inches)73%moderate
February Weather3°C (37°F)11 mm (0.4 inches)76%high
March Weather9°C (49°F)36 mm (1.4 inches)64%very high
April Weather13°C (55°F)41 mm (1.6 inches)61%very high
May Weather18°C (64°F)60 mm (2.4 inches)71%extreme
June Weather24°C (76°F)37 mm (1.5 inches)75%extreme
July Weather26°C (79°F)44 mm (1.7 inches)75%extreme
August Weather25°C (77°F)55 mm (2.2 inches)80%extreme
September Weather22°C (71°F)32 mm (1.3 inches)80%very high
October Weather13°C (56°F)34 mm (1.3 inches)78%high
November Weather8°C (47°F)7 mm (0.3 inches)76%moderate
December Weather4°C (39°F)15 mm (0.6 inches)78%moderate

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