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May Weather in Roseville, United States

Last updated: June 24, 2025

In Roseville, United States, the average temperature in May hovers around 18°C (64°F), with extremes ranging from a chilly -1°C (30°F) to a balmy 32°C (90°F). Expect 141 mm (5.5 in) of precipitation spread over about 16 days, contributing to an average humidity level of 82%. Whether you're planning an adventure or just curious, this weather snapshot gives you a clear picture of what to anticipate!

May Temperature in Roseville

In May in Roseville, the average temperature is 18°C (64°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as -1°C (30°F). Be prepared for a wide range of temperatures if you plan to travel during this time!

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

The chart illustrates May temperature patterns in Roseville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Roseville, May typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec323643536471767369584337
Data source: Temperature data for Roseville 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 Roseville

In Roseville in May, the precipitation amount is 141 mm (5.5 in) accumulated over 16 days.

May Precipitation Trends in Roseville

The chart displays monthly precipitation patterns in Roseville, 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 Roseville, May typically receives around 141 mm (5.5 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec8811911713814117413311310610794110
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Roseville

In Roseville in May humidity is 82%. With an average temperature of 18°C (64°F), this humidity feels like a warm, muggy embrace that can make exploring the area feel stifling, leaving travelers drenched in sweat and longing for respite in the shade.

May Average Humidity in Roseville

This chart illustrates the average monthly humidity levels in Roseville, 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 Roseville is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Roseville

In Roseville in May, 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 Roseville.

Maximum UV Index Levels in Roseville for May

The chart shows the monthly maximum UV Index (UVI) for Roseville 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 Roseville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Roseville 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 Roseville Compares to Other Months

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

This table compares monthly weather conditions in Roseville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)88 mm (3.5 inches)88%moderate
February Weather2°C (36°F)119 mm (4.7 inches)88%moderate
March Weather6°C (44°F)117 mm (4.6 inches)88%high
April Weather12°C (53°F)138 mm (5.4 inches)86%very high
May Weather18°C (64°F)141 mm (5.5 inches)82%very high
June Weather22°C (72°F)174 mm (6.9 inches)84%very high
July Weather24°C (76°F)133 mm (5.2 inches)82%very high
August Weather23°C (74°F)113 mm (4.5 inches)73%very high
September Weather20°C (69°F)106 mm (4.2 inches)73%very high
October Weather15°C (58°F)107 mm (4.2 inches)81%high
November Weather6°C (43°F)94 mm (3.7 inches)89%moderate
December Weather3°C (38°F)110 mm (4.3 inches)86%moderate

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