May Weather in Bolton, United States

Last updated: June 24, 2025

In May, the average temperature in Bolton, United States is a pleasant 22°C (72°F). Expect a range where temperatures can dip to a chilly 4°C (40°F) or soar to a scorching 36°C (98°F). Prepare for 128 mm (5.0 in) of precipitation spread over 11 days, and keep in mind the average humidity is a sticky 81%.

May Temperature in Bolton

In May in Bolton, the average temperature is 22°C (72°F). The maximum can reach 36°C (98°F), and the minimum can be as low as 4°C (40°F). This makes it a great destination for travelers seeking comfortable weather with a mix of warm and cool experiences.

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

The chart illustrates May temperature patterns in Bolton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bolton, May typically has an average temperature of 22°C (72°F), with highs reaching up to 36°C (98°F) and lows dropping to around 4°C (40°F).

Data source: Temperature data for Bolton generated using information from the Copernicus Climate Change Service.

May Precipitation in Bolton

In Bolton in May, the total precipitation amount is 128 mm (5.0 in) spread over 11 days.

May Precipitation Trends in Bolton

The chart displays monthly precipitation patterns in Bolton, 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 Bolton, May typically receives around 128 mm (5.0 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Bolton

In Bolton in May, humidity is 81%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket, making traveling feel both lush and a bit stifling, as the air clings to your skin and every step is accompanied by a gentle sheen of moisture.

May Average Humidity in Bolton

This chart illustrates the average monthly humidity levels in Bolton, 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 Bolton is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Bolton

In Bolton 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 Bolton.

Maximum UV Index Levels in Bolton for May

The chart shows the monthly maximum UV Index (UVI) for Bolton 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 Bolton typically reaches 11, which falls under the extreme exposure category.

Data source: Bolton 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 Bolton Compares to Other Months

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

This table compares monthly weather conditions in Bolton, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	75 mm (2.9 inches)	85%	moderate
February Weather	12°C (53°F)	89 mm (3.5 inches)	82%	high
March Weather	13°C (56°F)	67 mm (2.6 inches)	81%	very high
April Weather	18°C (64°F)	97 mm (3.8 inches)	80%	very high
May Weather	22°C (72°F)	128 mm (5.0 inches)	81%	extreme
June Weather	25°C (77°F)	166 mm (6.5 inches)	81%	extreme
July Weather	27°C (80°F)	178 mm (7.0 inches)	81%	extreme
August Weather	26°C (80°F)	210 mm (8.3 inches)	80%	very high
September Weather	24°C (76°F)	176 mm (6.9 inches)	79%	very high
October Weather	20°C (68°F)	65 mm (2.6 inches)	80%	very high
November Weather	13°C (55°F)	100 mm (3.9 inches)	85%	high
December Weather	10°C (51°F)	127 mm (5.0 inches)	86%	moderate