May Weather in Union City, United States

Last updated: June 24, 2025

In May, the average temperature in Union City, United States hovers around 16°C (61°F), but be prepared for a range with minimums dipping to -2°C (28°F) and maximums soaring up to 34°C (94°F). Expect 142 mm (5.6 in) of precipitation spread over 16 days, contributing to a cozy average humidity of 81%.

May Temperature in Union City

In May in Union City, the average temperature is 16°C (61°F). The maximum can reach 34°C (94°F), while the minimum can drop as low as -2°C (28°F). Be prepared for a wide range of temperatures when traveling during this time.

May Weather in Union City: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Union City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union City, May typically has an average temperature of 16°C (61°F), with highs reaching up to 34°C (94°F) and lows dropping to around -2°C (28°F).

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

May Precipitation in Union City

In Union City in May, the precipitation amount is 142 mm (5.6 in) distributed over 16 days.

May Precipitation Trends in Union City

The chart displays monthly precipitation patterns in Union City, 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 Union City, May typically receives around 142 mm (5.6 inches) of precipitation spread over approximately 16 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 Union City

In Union City in May, humidity is 81%. With an average temperature of 16°C (61°F), this humidity feels like a warm, heavy blanket wrapping around you as you explore the sights, making it essential to stay hydrated and take regular breaks in the shade.

May Average Humidity in Union City

This chart illustrates the average monthly humidity levels in Union City, 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 Union City 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 Union City

In Union City 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 Union City.

Maximum UV Index Levels in Union City for May

The chart shows the monthly maximum UV Index (UVI) for Union City 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 Union City typically reaches 9, which falls under the very high exposure category.

Data source: Union City 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 Union City Compares to Other Months

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

This table compares monthly weather conditions in Union City, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	71 mm (2.8 inches)	85%	moderate
February Weather	-2°C (28°F)	75 mm (2.9 inches)	85%	moderate
March Weather	3°C (38°F)	89 mm (3.5 inches)	86%	high
April Weather	8°C (48°F)	97 mm (3.8 inches)	87%	very high
May Weather	16°C (61°F)	142 mm (5.6 inches)	81%	very high
June Weather	22°C (71°F)	115 mm (4.5 inches)	82%	very high
July Weather	24°C (75°F)	120 mm (4.7 inches)	81%	very high
August Weather	22°C (72°F)	75 mm (3.0 inches)	79%	very high
September Weather	19°C (66°F)	86 mm (3.4 inches)	78%	very high
October Weather	12°C (54°F)	131 mm (5.2 inches)	81%	high
November Weather	4°C (39°F)	77 mm (3.0 inches)	89%	moderate
December Weather	0°C (33°F)	60 mm (2.4 inches)	86%	low