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May Weather in Summit, United States

Last updated: June 24, 2025

In May, the average temperature in Summit, United States is a pleasant 20°C (68°F). However, temperatures can vary significantly, with minimums dipping to 5°C (41°F) and maximums soaring up to 33°C (92°F). Expect 170 mm (6.7 in) of precipitation spread over 14 days, contributing to an average humidity level of 83%. Stay prepared for the diverse weather this month brings!

May Temperature in Summit

In May in Summit, the average temperature is 20°C (68°F), with maximums reaching 33°C (92°F) and minimums dropping as low as 5°C (41°F). This climate makes Summit an ideal destination for travelers seeking a pleasant mix of warm days and cool nights.

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 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec384152576876807874614844
Data source: Temperature data for Summit 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 Summit

In Summit in May, the total precipitation amount is 170 mm (6.7 in) accumulated over the course of 14 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 170 mm (6.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec751021331401708467110561017181
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Summit

In Summit in May humidity is 83%. With an average temperature of 20°C (68°F), this humidity feels like a warm, heavy blanket enveloping you, making it feel much warmer than it is. Traveling in such conditions can be quite taxing, as the air feels thick, often leading to a sense of exhaustion and requiring frequent breaks to seek shade or hydration.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
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 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 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
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.
 TemperaturePrecipitationHumidityUV
January Weather3°C (39°F)75 mm (3.0 inches)81%moderate
February Weather5°C (41°F)101 mm (4.0 inches)78%high
March Weather11°C (52°F)133 mm (5.2 inches)76%high
April Weather14°C (58°F)140 mm (5.5 inches)78%very high
May Weather20°C (68°F)170 mm (6.7 inches)83%very high
June Weather25°C (77°F)84 mm (3.3 inches)83%extreme
July Weather27°C (81°F)67 mm (2.6 inches)78%extreme
August Weather26°C (78°F)110 mm (4.3 inches)68%very high
September Weather23°C (75°F)56 mm (2.2 inches)64%very high
October Weather16°C (62°F)101 mm (4.0 inches)70%high
November Weather9°C (49°F)71 mm (2.8 inches)83%moderate
December Weather7°C (44°F)81 mm (3.2 inches)87%moderate

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