May Weather in Summit, United States

Last updated: June 24, 2025

In May, the average temperature in Summit, United States hovers around 23°C (74°F). However, temperatures can range from a refreshing 10°C (50°F) to a sweltering 34°C (93°F). Be prepared for some rain, as 173 mm (6.8 in) of precipitation typically falls over 11 days. With an average humidity of 81%, the air can feel quite humid, making it a month to remember!

May Temperature in Summit

In May in Summit, the average temperature is 23°C (74°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop as low as 10°C (50°F). Be sure to pack layers to enjoy both warm days and cooler nights during your travels.

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

The chart illustrates May temperature patterns in Summit, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Summit, May typically has an average temperature of 23°C (74°F), with highs reaching up to 34°C (93°F) and lows dropping to around 10°C (50°F).

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

May Precipitation in Summit

In Summit in May, the total precipitation amount is 173 mm (6.8 in) over the course of 11 days.

May Precipitation Trends in Summit

The chart displays monthly precipitation patterns in Summit, 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 Summit, May typically receives around 173 mm (6.8 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 Summit

In Summit in May, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

May Average Humidity in Summit

This chart illustrates the average monthly humidity levels in Summit, 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 Summit 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 Summit

In Summit 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 Summit.

Maximum UV Index Levels in Summit for May

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

Data source: Summit 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 Summit Compares to Other Months

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

This table compares monthly weather conditions in Summit, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	125 mm (4.9 inches)	83%	moderate
February Weather	13°C (56°F)	125 mm (4.9 inches)	83%	very high
March Weather	17°C (62°F)	118 mm (4.6 inches)	80%	very high
April Weather	19°C (66°F)	144 mm (5.7 inches)	81%	extreme
May Weather	23°C (74°F)	173 mm (6.8 inches)	81%	extreme
June Weather	26°C (79°F)	151 mm (5.9 inches)	78%	extreme
July Weather	27°C (81°F)	150 mm (5.9 inches)	79%	extreme
August Weather	27°C (80°F)	175 mm (6.9 inches)	79%	extreme
September Weather	26°C (78°F)	111 mm (4.4 inches)	79%	very high
October Weather	21°C (70°F)	107 mm (4.2 inches)	77%	very high
November Weather	14°C (57°F)	90 mm (3.5 inches)	85%	high
December Weather	12°C (54°F)	147 mm (5.8 inches)	88%	moderate