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May Weather in Bristol, United States

Last updated: June 24, 2025

In May, the average temperature in Bristol, United States is a comfortable 12°C (54°F). Expect temperatures to vary from a chilly 2°C (35°F) to a warm 31°C (87°F). With an average humidity of 79% and 75 mm (2.9 in) of precipitation over 11 days, it's wise to prepare for a mix of weather during your visit!

May Temperature in Bristol

In May in Bristol, the average temperature is 12°C (54°F), with maximums reaching 31°C (87°F) and minimums dropping as low as 2°C (35°F). This variation in temperature makes Bristol an ideal destination for travelers seeking a diverse climate experience.

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

The chart illustrates May temperature patterns in Bristol, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bristol, May typically has an average temperature of 12°C (54°F), with highs reaching up to 31°C (87°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec272834445465707063534030
Data source: Temperature data for Bristol 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 Bristol

In Bristol in May, the precipitation amount is 75 mm (2.9 in) over the course of 11 days.

May Precipitation Trends in Bristol

The chart displays monthly precipitation patterns in Bristol, 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 Bristol, May typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec87897412275651057776128111120
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Bristol

In Bristol in May, humidity is 79%. With an average temperature of 12°C (54°F), this humidity makes traveling feel quite muggy, leading to a sticky discomfort that can sap your energy and make outdoor activities less enjoyable.

May Average Humidity in Bristol

This chart illustrates the average monthly humidity levels in Bristol, 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 Bristol is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%84%79%79%86%85%83%80%77%80%81%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Bristol

In Bristol in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Bristol.

Maximum UV Index Levels in Bristol for May

The chart shows the monthly maximum UV Index (UVI) for Bristol 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 Bristol typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Bristol 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 Bristol Compares to Other Months

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

This table compares monthly weather conditions in Bristol, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)87 mm (3.4 inches)85%low
February Weather-2°C (28°F)88 mm (3.5 inches)86%moderate
March Weather1°C (34°F)73 mm (2.9 inches)84%moderate
April Weather7°C (44°F)122 mm (4.8 inches)79%high
May Weather12°C (54°F)75 mm (2.9 inches)79%very high
June Weather18°C (65°F)65 mm (2.6 inches)86%very high
July Weather21°C (71°F)105 mm (4.1 inches)85%very high
August Weather21°C (71°F)76 mm (3.0 inches)83%very high
September Weather17°C (63°F)76 mm (3.0 inches)80%high
October Weather11°C (53°F)128 mm (5.0 inches)77%moderate
November Weather4°C (40°F)111 mm (4.4 inches)80%moderate
December Weather-1°C (31°F)120 mm (4.7 inches)81%low

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