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May Weather in Saint Johnsville, United States

Last updated: June 24, 2025

In May, the average temperature in Saint Johnsville, United States hovers around 14°C (57°F), with extremes ranging from a chilly -3°C (28°F) to a warm 32°C (89°F). Expect 131 mm (5.2 in) of precipitation over about 16 days, contributing to an average humidity of 76%. Embrace the variety this month brings!

May Temperature in Saint Johnsville

In May in Saint Johnsville, the average temperature is 14°C (57°F). Maximums can reach 32°C (89°F), and minimums can be as low as -3°C (28°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

May Weather in Saint Johnsville: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Saint Johnsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Johnsville, May typically has an average temperature of 14°C (57°F), with highs reaching up to 32°C (89°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec222532445765706861513628
Data source: Temperature data for Saint Johnsville 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 Saint Johnsville

In Saint Johnsville in May, the precipitation amount is 131 mm (5.2 in) during 16 days, indicating a relatively wet period for the region.

May Precipitation Trends in Saint Johnsville

The chart displays monthly precipitation patterns in Saint Johnsville, 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 Saint Johnsville, May typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec931109413213111914312996170117114
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Saint Johnsville

In Saint Johnsville in May humidity is 76%. With an average temperature of 14°C (57°F), this humidity feels like a warm blanket wrapped around you, creating a heavy atmosphere that can make outdoor activities feel sluggish and stifling, urging travelers to seek shade and refreshment more frequently.

May Average Humidity in Saint Johnsville

This chart illustrates the average monthly humidity levels in Saint Johnsville, 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 Saint Johnsville is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%76%72%67%64%72%81%87%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Saint Johnsville

In Saint Johnsville 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 Saint Johnsville.

Maximum UV Index Levels in Saint Johnsville for May

The chart shows the monthly maximum UV Index (UVI) for Saint Johnsville 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 Saint Johnsville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998632
Data source: Saint Johnsville 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 Saint Johnsville Compares to Other Months

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

This table compares monthly weather conditions in Saint Johnsville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)93 mm (3.7 inches)89%moderate
February Weather-4°C (26°F)110 mm (4.3 inches)88%moderate
March Weather0°C (32°F)94 mm (3.7 inches)86%high
April Weather7°C (44°F)132 mm (5.2 inches)84%very high
May Weather14°C (57°F)131 mm (5.2 inches)76%very high
June Weather18°C (65°F)119 mm (4.7 inches)72%very high
July Weather21°C (70°F)143 mm (5.6 inches)66%very high
August Weather20°C (68°F)129 mm (5.1 inches)64%very high
September Weather16°C (62°F)96 mm (3.8 inches)72%very high
October Weather10°C (51°F)170 mm (6.7 inches)81%high
November Weather2°C (36°F)117 mm (4.6 inches)87%moderate
December Weather-2°C (28°F)114 mm (4.5 inches)84%low

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