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May Weather in Red Bluff, United States

Last updated: June 24, 2025

In May, the average temperature in Red Bluff, United States is a comfortable 21°C (70°F). However, be prepared for a range, as temperatures can dip to a chilly 5°C (40°F) or soar to a blazing 39°C (102°F). Expect some rainfall too, with an average precipitation of 37 mm (1.5 in) over about 3 days. The atmosphere tends to be quite humid, with average humidity levels around 72%.

May Temperature in Red Bluff

In May in Red Bluff, the average temperature is 21°C (70°F). Maximums can reach 39°C (102°F) and minimums can be as low as 5°C (40°F). Pack accordingly for a wide range of temperatures to enjoy your travels comfortably.

May Weather in Red Bluff: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Red Bluff, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Red Bluff, May typically has an average temperature of 21°C (70°F), with highs reaching up to 39°C (102°F) and lows dropping to around 5°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec485054616980868476655548
Data source: Temperature data for Red Bluff 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 Red Bluff

In Red Bluff in May, the precipitation amount is 37 mm (1.5 in) over the course of 3 days.

May Precipitation Trends in Red Bluff

The chart displays monthly precipitation patterns in Red Bluff, 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 Red Bluff, May typically receives around 37 mm (1.5 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec137127126593770183969101
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Red Bluff

In Red Bluff in May, humidity is 72%. With an average temperature of 21°C (70°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities a bit sticky and sweaty, but still manageable for traveling if you stay hydrated and take regular breaks in the shade.

May Average Humidity in Red Bluff

This chart illustrates the average monthly humidity levels in Red Bluff, 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 Red Bluff is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%86%83%72%67%56%42%46%67%86%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Red Bluff

In Red Bluff 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 Red Bluff.

Maximum UV Index Levels in Red Bluff for May

The chart shows the monthly maximum UV Index (UVI) for Red Bluff 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 Red Bluff typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3478101110109642
Data source: Red Bluff 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 Red Bluff Compares to Other Months

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

This table compares monthly weather conditions in Red Bluff, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)137 mm (5.4 inches)86%moderate
February Weather10°C (51°F)127 mm (5.0 inches)87%moderate
March Weather12°C (54°F)126 mm (5.0 inches)86%high
April Weather16°C (61°F)59 mm (2.3 inches)83%very high
May Weather21°C (70°F)37 mm (1.5 inches)72%very high
June Weather26°C (80°F)7 mm (0.3 inches)67%extreme
July Weather30°C (86°F)0 mm (0.0 inches)56%very high
August Weather29°C (84°F)1 mm (0.0 inches)42%very high
September Weather24°C (76°F)8 mm (0.3 inches)46%very high
October Weather18°C (65°F)39 mm (1.5 inches)67%high
November Weather13°C (55°F)69 mm (2.7 inches)86%moderate
December Weather9°C (48°F)101 mm (4.0 inches)86%low

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