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May Weather in Idaho City, United States

Last updated: June 24, 2025

In May, the average temperature in Idaho City, United States hovers around 9°C (49°F). During this time, temperatures can dip as low as -11°C (13°F) and reach a pleasant 29°C (84°F). Prepare for some rainy days, with an average precipitation of 68 mm (2.7 in) over 13 days, and expect a moderate humidity level of around 71%.

May Temperature in Idaho City

In May in Idaho City, the average temperature is 9°C (49°F). Maximums can reach 29°C (84°F), and minimums can be as low as -11°C (13°F). Travelers should be prepared for a wide range of temperatures, making layered clothing essential for daily outings.

May Weather in Idaho City: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Idaho City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Idaho City, May typically has an average temperature of 9°C (49°F), with highs reaching up to 29°C (84°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec252635404959706858433325
Data source: Temperature data for Idaho 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.

May Precipitation in Idaho City

In Idaho City in May, the precipitation amount is 68 mm (2.7 in) spread over 13 days.

May Precipitation Trends in Idaho City

The chart displays monthly precipitation patterns in Idaho City, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Idaho City, May typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec981269079684752131517785
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Idaho City

In Idaho City in May, humidity is 71%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making it essential to dress warmly and plan for cozy indoor activities while exploring the area.

May Average Humidity in Idaho City

This chart illustrates the average monthly humidity levels in Idaho City, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Idaho City is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%85%79%71%71%66%50%48%65%84%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Idaho City

In Idaho City in May, 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 Idaho City.

Maximum UV Index Levels in Idaho City for May

The chart shows the monthly maximum UV Index (UVI) for Idaho City in May, 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 May, the maximum UV index in Idaho City typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3578111111109642
Data source: Idaho City May 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 May Weather in Idaho City Compares to Other Months

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

This table compares monthly weather conditions in Idaho City, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)98 mm (3.9 inches)88%moderate
February Weather-3°C (26°F)126 mm (5.0 inches)89%moderate
March Weather1°C (35°F)90 mm (3.6 inches)85%high
April Weather4°C (40°F)79 mm (3.1 inches)79%very high
May Weather9°C (49°F)68 mm (2.7 inches)71%extreme
June Weather15°C (60°F)47 mm (1.8 inches)71%extreme
July Weather21°C (70°F)5 mm (0.2 inches)66%extreme
August Weather20°C (68°F)20 mm (0.8 inches)50%very high
September Weather14°C (58°F)31 mm (1.2 inches)48%very high
October Weather6°C (43°F)51 mm (2.0 inches)65%high
November Weather1°C (33°F)77 mm (3.0 inches)84%moderate
December Weather-4°C (25°F)85 mm (3.4 inches)87%low

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