March Weather in McLean, United States

Last updated: June 24, 2025

The average temperature in McLean, United States during March is a brisk 6°C (43°F). It can swing dramatically, with minimums dipping to a chilling -18°C (0°F) and maxing out at a pleasant 26°C (78°F). Expect 121 mm (4.8 in) of precipitation spread over 11 days, and prepare for a high average humidity of 84%.

March Temperature in McLean

In March in McLean, the average temperature is 6°C (43°F), with highs that can reach 26°C (78°F) and lows that can drop to -18°C (0°F). This wide temperature range makes it essential for travelers to pack accordingly to enjoy their visit comfortably.

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

The chart illustrates March temperature patterns in McLean, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In McLean, March typically has an average temperature of 6°C (43°F), with highs reaching up to 26°C (78°F) and lows dropping to around -18°C (0°F).

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

March Precipitation in McLean

In McLean in March, the total precipitation amount is 121 mm (4.8 in), which occurs over the course of 11 days.

March Precipitation Trends in McLean

The chart displays monthly precipitation patterns in McLean, 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 McLean, March typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 11 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 McLean

In McLean in March, humidity is 84%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that penetrates your clothing, making outdoor excursions uncomfortable and prompting travelers to seek refuge indoors or find warm, sheltered spots to enjoy their surroundings.

March Average Humidity in McLean

This chart illustrates the average monthly humidity levels in McLean, 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 McLean is approximately 84%, 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 McLean

In McLean in March, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in McLean.

Maximum UV Index Levels in McLean for March

The chart shows the monthly maximum UV Index (UVI) for McLean 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 McLean typically reaches 7, which falls under the high exposure category.

Data source: McLean 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 McLean Compares to Other Months

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

This table compares monthly weather conditions in McLean, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	67 mm (2.7 inches)	82%	moderate
February Weather	-1°C (31°F)	70 mm (2.7 inches)	83%	moderate
March Weather	6°C (43°F)	121 mm (4.8 inches)	84%	high
April Weather	11°C (52°F)	123 mm (4.8 inches)	85%	very high
May Weather	18°C (65°F)	150 mm (5.9 inches)	79%	very high
June Weather	23°C (74°F)	123 mm (4.8 inches)	82%	extreme
July Weather	25°C (77°F)	114 mm (4.5 inches)	80%	very high
August Weather	23°C (74°F)	96 mm (3.8 inches)	81%	very high
September Weather	21°C (71°F)	62 mm (2.4 inches)	80%	very high
October Weather	14°C (57°F)	115 mm (4.5 inches)	82%	high
November Weather	5°C (41°F)	65 mm (2.6 inches)	88%	moderate
December Weather	2°C (35°F)	54 mm (2.1 inches)	84%	low