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May Weather in Cortland, United States

Last updated: June 24, 2025

In May, the average temperature in Cortland, United States hovers around 16°C (61°F). Expect a temperature range that can dip as low as -1°C (30°F) and soar to a maximum of 33°C (93°F). On average, the region experiences 169 mm (6.7 in) of precipitation over 15 days, contributing to a humidity level of approximately 79%.

May Temperature in Cortland

In May in Cortland, the average temperature is 16°C (61°F). Maximum temperatures can reach 33°C (93°F), while minimums can drop as low as -1°C (30°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates May temperature patterns in Cortland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cortland, May typically has an average temperature of 16°C (61°F), with highs reaching up to 33°C (93°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec232639486172757267533832
Data source: Temperature data for Cortland 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 Cortland

In Cortland in May, the precipitation amount is 169 mm (6.7 in) over a span of 15 days.

May Precipitation Trends in Cortland

The chart displays monthly precipitation patterns in Cortland, 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 Cortland, May typically receives around 169 mm (6.7 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec61587811116912889831071225249
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Cortland

In Cortland in May humidity is 79%. With an average temperature of 16°C (61°F), this humidity feels like a warm, moist embrace, making travel a bit more challenging as the air tends to weigh heavily, but it also offers a refreshing atmosphere perfect for exploring local sights and enjoying nature.

May Average Humidity in Cortland

This chart illustrates the average monthly humidity levels in Cortland, 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 Cortland is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Cortland

In Cortland 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 Cortland.

Maximum UV Index Levels in Cortland for May

The chart shows the monthly maximum UV Index (UVI) for Cortland 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 Cortland typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098632
Data source: Cortland 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 Cortland Compares to Other Months

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

This table compares monthly weather conditions in Cortland, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)60 mm (2.4 inches)82%moderate
February Weather-4°C (26°F)58 mm (2.3 inches)83%moderate
March Weather4°C (39°F)78 mm (3.1 inches)84%high
April Weather9°C (48°F)111 mm (4.4 inches)85%very high
May Weather16°C (61°F)169 mm (6.7 inches)79%very high
June Weather22°C (72°F)128 mm (5.1 inches)82%very high
July Weather24°C (75°F)88 mm (3.5 inches)80%very high
August Weather22°C (73°F)83 mm (3.3 inches)81%very high
September Weather19°C (67°F)107 mm (4.2 inches)80%very high
October Weather12°C (54°F)122 mm (4.8 inches)82%high
November Weather3°C (38°F)52 mm (2.0 inches)88%moderate
December Weather0°C (32°F)49 mm (1.9 inches)84%low

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