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May Weather in Sterling, United States

Last updated: June 24, 2025

In Sterling, United States, the average temperature in May is a pleasant 21°C (71°F). However, temperatures can swing, with a minimum of 5°C (42°F) and a maximum soaring up to 37°C (99°F). Expect some rain, as precipitation averages around 149 mm (5.9 in) over 11 days, accompanied by a notable humidity level of 82%.

May Temperature in Sterling

In May in Sterling, the average temperature is 21°C (71°F), with maximums reaching up to 37°C (99°F) and minimums dropping as low as 5°C (42°F). Be prepared for a range of temperatures, making it essential to pack accordingly for your travel to Sterling this month.

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

The chart illustrates May temperature patterns in Sterling, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sterling, May typically has an average temperature of 21°C (71°F), with highs reaching up to 37°C (99°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec414255617180848276635145
Data source: Temperature data for Sterling 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 Sterling

In Sterling in May, the total precipitation amount is 149 mm (5.9 in) spread over 11 days.

May Precipitation Trends in Sterling

The chart displays monthly precipitation patterns in Sterling, 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 Sterling, May typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec40428412014962365595932237
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Sterling

In Sterling in May humidity is 82%. With an average temperature of 21°C (71°F), this humidity feels like a warm, muggy embrace that can make traveling feel sticky and exhausting, urging you to seek shade and hydration as you explore the vibrant surroundings.

May Average Humidity in Sterling

This chart illustrates the average monthly humidity levels in Sterling, 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 Sterling is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%76%70%72%82%82%80%72%64%71%81%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Sterling

In Sterling 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 Sterling.

Maximum UV Index Levels in Sterling for May

The chart shows the monthly maximum UV Index (UVI) for Sterling 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 Sterling typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110754
Data source: Sterling 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 Sterling Compares to Other Months

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

This table compares monthly weather conditions in Sterling, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)40 mm (1.6 inches)76%moderate
February Weather6°C (42°F)42 mm (1.6 inches)76%high
March Weather13°C (55°F)84 mm (3.3 inches)70%very high
April Weather16°C (61°F)120 mm (4.7 inches)72%very high
May Weather21°C (71°F)149 mm (5.9 inches)82%extreme
June Weather26°C (80°F)62 mm (2.4 inches)82%extreme
July Weather29°C (84°F)36 mm (1.4 inches)80%extreme
August Weather28°C (83°F)55 mm (2.2 inches)72%extreme
September Weather24°C (76°F)95 mm (3.7 inches)64%very high
October Weather17°C (63°F)93 mm (3.7 inches)71%high
November Weather11°C (51°F)22 mm (0.9 inches)81%moderate
December Weather7°C (45°F)37 mm (1.5 inches)84%moderate

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