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May Weather in Gettysburg, United States

Last updated: June 24, 2025

In Gettysburg, United States during May, the average temperature hovers around 17°C (64°F). Expect a range where temperatures can dip to a chilly -1°C (30°F) or soar to a warm 33°C (91°F). With an average precipitation of 137 mm (5.4 in) spread across 15 days, you'll want to be prepared for some rainy spells. The atmosphere remains quite humid, with an average humidity level of 81%.

May Temperature in Gettysburg

In May in Gettysburg, the average temperature is 17°C (64°F). Maximum temperatures can reach 33°C (91°F), while minimums can drop as low as -1°C (30°F). Be prepared for fluctuating weather conditions that offer both warmth and cooler spells, making it ideal for a diverse range of outdoor activities.

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

The chart illustrates May temperature patterns in Gettysburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gettysburg, May typically has an average temperature of 17°C (64°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec303342516372757369574136
Data source: Temperature data for Gettysburg 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 Gettysburg

In Gettysburg in May, the precipitation amount is 137 mm (5.4 in) over the course of 15 days.

May Precipitation Trends in Gettysburg

The chart displays monthly precipitation patterns in Gettysburg, 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 Gettysburg, May typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec72971121001381271079987989484
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Gettysburg

In Gettysburg in May, humidity is 81%. With an average temperature of 17°C (64°F), this humidity feels like walking through a warm mist, enveloping you in a sticky embrace that can quickly lead to discomfort during long sightseeing excursions.

May Average Humidity in Gettysburg

This chart illustrates the average monthly humidity levels in Gettysburg, 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 Gettysburg is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Gettysburg

In Gettysburg 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 Gettysburg.

Maximum UV Index Levels in Gettysburg for May

The chart shows the monthly maximum UV Index (UVI) for Gettysburg 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 Gettysburg typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Gettysburg 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 Gettysburg Compares to Other Months

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

This table compares monthly weather conditions in Gettysburg, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)72 mm (2.8 inches)88%moderate
February Weather1°C (33°F)97 mm (3.8 inches)88%moderate
March Weather6°C (42°F)112 mm (4.4 inches)87%high
April Weather11°C (52°F)100 mm (3.9 inches)85%very high
May Weather17°C (64°F)137 mm (5.4 inches)81%very high
June Weather22°C (72°F)127 mm (5.0 inches)82%very high
July Weather24°C (76°F)107 mm (4.2 inches)81%very high
August Weather23°C (73°F)99 mm (3.9 inches)73%very high
September Weather20°C (69°F)87 mm (3.4 inches)73%very high
October Weather14°C (57°F)98 mm (3.9 inches)78%high
November Weather5°C (42°F)94 mm (3.7 inches)89%moderate
December Weather2°C (36°F)84 mm (3.3 inches)87%moderate

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