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May Weather in Grand Island, United States

Last updated: June 24, 2025

In May, the average temperature in Grand Island, United States hovers around 16°C (62°F), with a wide range between a chilly 0°C (33°F) and a sweltering 36°C (97°F). Expect a precipitation of 147 mm (5.8 in) over about 13 days, while the air remains notably humid at 80%. Prepare accordingly for a mix of weather!

May Temperature in Grand Island

In May in Grand Island, the average temperature is 16°C (62°F). Maximum temperatures can reach 36°C (97°F), while minimums can dip as low as 0°C (33°F). Pack accordingly for a range of weather conditions to enjoy your travels.

May Weather in Grand Island: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Grand Island, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grand Island, May typically has an average temperature of 16°C (62°F), with highs reaching up to 36°C (97°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec262641496175777469524031
Data source: Temperature data for Grand Island 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 Grand Island

In Grand Island in May, the total precipitation amount is 147 mm (5.8 in), which occurs over a span of 13 days.

May Precipitation Trends in Grand Island

The chart displays monthly precipitation patterns in Grand Island, 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 Grand Island, May typically receives around 147 mm (5.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec2819865614789667159862142
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Grand Island

In Grand Island in May humidity is 80%. With an average temperature of 16°C (62°F), this humidity feels like a warm, muggy embrace, making travel slightly uncomfortable as the air hangs heavy, necessitating frequent hydration and light clothing to stay cool and refreshed.

May Average Humidity in Grand Island

This chart illustrates the average monthly humidity levels in Grand Island, 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 Grand Island is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%81%69%71%80%83%84%84%77%72%80%79%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Grand Island

In Grand Island 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 Grand Island.

Maximum UV Index Levels in Grand Island for May

The chart shows the monthly maximum UV Index (UVI) for Grand Island 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 Grand Island typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101110108643
Data source: Grand Island 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 Grand Island Compares to Other Months

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

This table compares monthly weather conditions in Grand Island, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)28 mm (1.1 inches)73%moderate
February Weather-4°C (26°F)19 mm (0.7 inches)81%moderate
March Weather5°C (41°F)86 mm (3.4 inches)69%high
April Weather10°C (50°F)56 mm (2.2 inches)71%very high
May Weather16°C (62°F)147 mm (5.8 inches)80%very high
June Weather24°C (75°F)89 mm (3.5 inches)83%extreme
July Weather25°C (78°F)66 mm (2.6 inches)84%very high
August Weather24°C (75°F)71 mm (2.8 inches)84%very high
September Weather21°C (69°F)59 mm (2.3 inches)77%very high
October Weather11°C (52°F)86 mm (3.4 inches)72%high
November Weather5°C (41°F)21 mm (0.8 inches)80%moderate
December Weather-1°C (31°F)42 mm (1.6 inches)79%moderate

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