May Weather in Baltimore, United States

Last updated: June 24, 2025

In May, the average temperature in Baltimore, United States hovers around 18°C (64°F). However, be prepared for a range of temperatures, with minimums dipping to -1°C (30°F) and maximums soaring up to 32°C (90°F). Expect 135 mm (5.3 in) of precipitation spread over 15 days, and a notable average humidity of 81%. Stay comfortable and plan accordingly!

May Temperature in Baltimore

In May in Baltimore, the average temperature is 18°C (64°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as -1°C (30°F). Be prepared for a wide range of temperatures if you plan to travel during this time!

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

The chart illustrates May temperature patterns in Baltimore, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Baltimore, May typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (30°F).

Data source: Temperature data for Baltimore generated using information from the Copernicus Climate Change Service.

May Precipitation in Baltimore

In Baltimore in May, the precipitation amount is 135 mm (5.3 in), occurring over a span of 15 days.

May Precipitation Trends in Baltimore

The chart displays monthly precipitation patterns in Baltimore, 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 Baltimore, May typically receives around 135 mm (5.3 inches) of precipitation spread over approximately 15 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Baltimore

In Baltimore in May, humidity is 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

May Average Humidity in Baltimore

This chart illustrates the average monthly humidity levels in Baltimore, 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 Baltimore is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Baltimore

In Baltimore 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 Baltimore.

Maximum UV Index Levels in Baltimore for May

The chart shows the monthly maximum UV Index (UVI) for Baltimore 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 Baltimore typically reaches 10, which falls under the very high exposure category.

Data source: Baltimore 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 Baltimore Compares to Other Months

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

This table compares monthly weather conditions in Baltimore, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	90 mm (3.6 inches)	88%	moderate
February Weather	2°C (36°F)	123 mm (4.8 inches)	88%	moderate
March Weather	6°C (43°F)	122 mm (4.8 inches)	87%	high
April Weather	11°C (53°F)	134 mm (5.3 inches)	85%	very high
May Weather	18°C (64°F)	135 mm (5.3 inches)	81%	very high
June Weather	22°C (72°F)	159 mm (6.3 inches)	82%	very high
July Weather	24°C (76°F)	128 mm (5.0 inches)	81%	very high
August Weather	23°C (74°F)	96 mm (3.8 inches)	73%	very high
September Weather	20°C (69°F)	96 mm (3.8 inches)	73%	very high
October Weather	14°C (58°F)	108 mm (4.3 inches)	78%	high
November Weather	6°C (43°F)	103 mm (4.1 inches)	89%	moderate
December Weather	3°C (37°F)	111 mm (4.4 inches)	87%	moderate