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May Weather in Chico, United States

Last updated: June 24, 2025

In Chico, United States, the average temperature in May hovers around 23°C (74°F), offering a pleasantly warm climate. However, temperatures can swing from a chilly 5°C (42°F) to a sweltering 37°C (98°F). Expect 119 mm (4.7 in) of precipitation spread over 11 days, contributing to an average humidity of 80%. Prepare accordingly for a mix of warmth and wetness!

May Temperature in Chico

In May in Chico, the average temperature is 23°C (74°F). The maximum can reach 37°C (98°F) and the minimum can be as low as 5°C (42°F). It's a great time to visit Chico, as you'll experience warm days perfect for outdoor adventures, while also needing a light jacket for cooler evenings.

May Weather in Chico: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Chico, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chico, May typically has an average temperature of 23°C (74°F), with highs reaching up to 37°C (98°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec454759647481858478665550
Data source: Temperature data for Chico 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 Chico

In Chico in May, the total precipitation amount is 119 mm (4.7 in), which occurs over the course of 11 days.

May Precipitation Trends in Chico

The chart displays monthly precipitation patterns in Chico, 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 Chico, May typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec47727479119803978881114747
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Chico

In Chico in May humidity is 80%. With an average temperature of 23°C (74°F), this humidity feels like walking through a warm, damp blanket, making travel feel sticky and muggy, where every step leaves you yearning for a cool breeze.

May Average Humidity in Chico

This chart illustrates the average monthly humidity levels in Chico, 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 Chico is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%74%75%80%80%75%67%64%70%82%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Chico

In Chico 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 Chico.

Maximum UV Index Levels in Chico for May

The chart shows the monthly maximum UV Index (UVI) for Chico 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 Chico typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
Data source: Chico 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 Chico Compares to Other Months

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

This table compares monthly weather conditions in Chico, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)47 mm (1.9 inches)77%moderate
February Weather8°C (47°F)72 mm (2.8 inches)76%high
March Weather15°C (59°F)74 mm (2.9 inches)74%very high
April Weather18°C (64°F)79 mm (3.1 inches)75%very high
May Weather23°C (74°F)119 mm (4.7 inches)80%extreme
June Weather27°C (81°F)80 mm (3.1 inches)80%extreme
July Weather29°C (85°F)39 mm (1.5 inches)75%extreme
August Weather29°C (84°F)78 mm (3.1 inches)67%extreme
September Weather25°C (78°F)88 mm (3.5 inches)64%very high
October Weather19°C (66°F)111 mm (4.4 inches)70%very high
November Weather13°C (55°F)47 mm (1.9 inches)82%high
December Weather10°C (50°F)47 mm (1.8 inches)85%moderate

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