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April Weather in Sun Valley, United States

Last updated: June 24, 2025

In Sun Valley, United States, the average temperature in April hovers around 13°C (56°F), with fluctuations ranging from a chilly -3°C (26°F) to a warm 29°C (85°F). Expect 11 mm (0.4 in) of precipitation spread across 3 days, complemented by an average humidity of 63%. Whether you're exploring the outdoors or enjoying cozy indoor activities, this month offers a diverse climate experience!

April Temperature in Sun Valley

In April in Sun Valley, the average temperature is 13°C (56°F). The maximum can reach 29°C (85°F) and the minimum can be as low as -3°C (26°F). It's advisable to pack layers and be prepared for a range of weather conditions while traveling.

April Weather in Sun Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Sun Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sun Valley, April typically has an average temperature of 13°C (56°F), with highs reaching up to 29°C (85°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec394146566375767570584941
Data source: Temperature data for Sun Valley 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 Sun Valley

In Sun Valley in April, the precipitation amount is 11 mm (0.4 in) over the course of 3 days.

April Precipitation Trends in Sun Valley

The chart displays monthly precipitation patterns in Sun Valley, 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 Sun Valley, April typically receives around 11 mm (0.4 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec648065111771115036363252
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Sun Valley

In Sun Valley in April humidity is 63%. With an average temperature of 13°C (56°F), this humidity feels like a brisk, refreshing embrace, perfect for leisurely sightseeing but a bit chilly for extended outdoor activities.

April Average Humidity in Sun Valley

This chart illustrates the average monthly humidity levels in Sun Valley, 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 Sun Valley is approximately 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%72%63%46%35%33%41%59%70%79%82%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Sun Valley

In Sun Valley in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Sun Valley.

Maximum UV Index Levels in Sun Valley for April

The chart shows the monthly maximum UV Index (UVI) for Sun Valley 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 Sun Valley typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213121111865
Data source: Sun Valley 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 Sun Valley Compares to Other Months

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

This table compares monthly weather conditions in Sun Valley, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)64 mm (2.5 inches)80%moderate
February Weather5°C (41°F)80 mm (3.1 inches)83%high
March Weather8°C (47°F)64 mm (2.5 inches)72%very high
April Weather13°C (56°F)11 mm (0.4 inches)63%extreme
May Weather17°C (63°F)17 mm (0.7 inches)46%extreme
June Weather24°C (75°F)7 mm (0.3 inches)35%extreme
July Weather24°C (76°F)111 mm (4.4 inches)33%extreme
August Weather24°C (75°F)50 mm (1.9 inches)41%extreme
September Weather21°C (70°F)36 mm (1.4 inches)59%extreme
October Weather15°C (59°F)36 mm (1.4 inches)70%very high
November Weather10°C (50°F)32 mm (1.3 inches)79%high
December Weather5°C (41°F)51 mm (2.0 inches)82%moderate

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