March Weather in Union, United States

Last updated: June 24, 2025

The average temperature in Union, United States during March hovers around 7°C (45°F), with a range that can dip to a chilly -1°C (31°F) and peak at a pleasant 21°C (70°F). This month sees about 148 mm (5.8 in) of precipitation spread across 16 days, contributing to a notably high average humidity of 85%. Prepare for a mix of cool and mild days, accompanied by frequent showers!

March Temperature in Union

In March in Union, the average temperature is 7°C (45°F), with maximums reaching 21°C (70°F) and minimums plummeting to as low as -1°C (31°F). Be prepared for a mix of mild and chilly weather, making it a great time for layered outfits during your travels.

March Weather in Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union, March typically has an average temperature of 7°C (45°F), with highs reaching up to 21°C (70°F) and lows dropping to around -1°C (31°F).

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

March Precipitation in Union

In Union in March, the precipitation amount is 148 mm (5.8 in) over a span of 16 days.

March Precipitation Trends in Union

The chart displays monthly precipitation patterns in Union, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Union, March typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 16 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Union

In Union in March, humidity is 85%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while traveling.

March Average Humidity in Union

This chart illustrates the average monthly humidity levels in Union, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Union is approximately 85%, offering insight into how humid the weather typically is during this month.

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

March UV Index in Union

In Union in March, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Union.

Maximum UV Index Levels in Union for March

The chart shows the monthly maximum UV Index (UVI) for Union in March, 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 March, the maximum UV index in Union typically reaches 5, which falls under the moderate exposure category.

Data source: Union March 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 March Weather in Union Compares to Other Months

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

This table compares monthly weather conditions in Union, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	256 mm (10.1 inches)	86%	low
February Weather	5°C (41°F)	171 mm (6.7 inches)	84%	moderate
March Weather	7°C (45°F)	148 mm (5.8 inches)	85%	moderate
April Weather	10°C (49°F)	124 mm (4.9 inches)	83%	high
May Weather	13°C (56°F)	60 mm (2.4 inches)	84%	very high
June Weather	16°C (61°F)	49 mm (1.9 inches)	84%	very high
July Weather	19°C (66°F)	9 mm (0.4 inches)	82%	very high
August Weather	19°C (66°F)	14 mm (0.6 inches)	73%	very high
September Weather	16°C (61°F)	95 mm (3.7 inches)	74%	high
October Weather	11°C (52°F)	168 mm (6.6 inches)	83%	moderate
November Weather	8°C (47°F)	243 mm (9.6 inches)	86%	moderate
December Weather	5°C (42°F)	250 mm (9.9 inches)	87%	low