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May Weather in Frederick, United States

Last updated: June 24, 2025

In May, the average temperature in Frederick, United States hovers around 22°C (72°F), but be prepared for a range: the minimum can drop to 4°C (39°F), while it can soar to a sweltering 40°C (104°F). Expect 115 mm (4.5 in) of precipitation spread over 11 days, contributing to an average humidity of a cozy 82%.

May Temperature in Frederick

In May in Frederick, the average temperature is 22°C (72°F). Maximums can reach 40°C (104°F) and minimums can be as low as 4°C (39°F). It's a perfect time for travelers to experience a range of weather, so be sure to pack accordingly for both warm days and cooler nights.

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

The chart illustrates May temperature patterns in Frederick, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Frederick, May typically has an average temperature of 22°C (72°F), with highs reaching up to 40°C (104°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec414356627281858477645246
Data source: Temperature data for Frederick 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 Frederick

In Frederick in May, the total precipitation amount is 115 mm (4.5 in) spread over 11 days.

May Precipitation Trends in Frederick

The chart displays monthly precipitation patterns in Frederick, 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 Frederick, May typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec3530699811558283786692229
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Frederick

In Frederick in May humidity is 82%. With an average temperature of 22°C (72°F), this humidity feels like walking through a warm, damp blanket, making travel feel more exhausting and sticky as sweat clings to your skin, and every step seems to draw you into a slow, sultry embrace.

May Average Humidity in Frederick

This chart illustrates the average monthly humidity levels in Frederick, 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 Frederick is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%76%70%72%82%82%80%72%64%71%81%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Frederick

In Frederick in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Frederick.

Maximum UV Index Levels in Frederick for May

The chart shows the monthly maximum UV Index (UVI) for Frederick 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 Frederick typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110854
Data source: Frederick 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 Frederick Compares to Other Months

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

This table compares monthly weather conditions in Frederick, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)35 mm (1.4 inches)76%moderate
February Weather6°C (43°F)30 mm (1.2 inches)76%high
March Weather13°C (56°F)69 mm (2.7 inches)70%very high
April Weather17°C (62°F)98 mm (3.9 inches)72%very high
May Weather22°C (72°F)115 mm (4.5 inches)82%extreme
June Weather27°C (81°F)58 mm (2.3 inches)82%extreme
July Weather29°C (85°F)28 mm (1.1 inches)80%extreme
August Weather29°C (84°F)37 mm (1.5 inches)72%extreme
September Weather25°C (77°F)86 mm (3.4 inches)64%very high
October Weather18°C (64°F)69 mm (2.7 inches)71%very high
November Weather11°C (52°F)22 mm (0.9 inches)81%moderate
December Weather8°C (46°F)29 mm (1.1 inches)84%moderate

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