March Weather in Houston, United States

Last updated: June 24, 2025

In Houston, United States, the average temperature in March hovers around -6°C (21°F), with a notable minimum of -26°C (-14°F) and a maximum reaching up to 9°C (49°F). During this chilly month, expect 42 mm (1.7 in) of precipitation spread over approximately 9 days, contributing to a high average humidity of 91%. Stay warm and prepared for the cool, damp conditions!

March Temperature in Houston

In March in Houston, the average temperature is -6°C (21°F). The maximum can reach 9°C (49°F), while the minimum can dip as low as -26°C (-14°F). Travelers should be prepared for cold weather and dress in layers to stay warm during their visit.

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

The chart illustrates March temperature patterns in Houston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Houston, March typically has an average temperature of -6°C (21°F), with highs reaching up to 9°C (49°F) and lows dropping to around -26°C (-14°F).

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

March Precipitation in Houston

In Houston in March, the precipitation amount is 42 mm (1.7 in) spread over 9 days.

March Precipitation Trends in Houston

The chart displays monthly precipitation patterns in Houston, 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 Houston, March typically receives around 42 mm (1.7 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

March Humidity in Houston

In Houston in March humidity is 91%. With an average temperature of -6°C (21°F), this humidity feels like wandering through a cold, damp fog that clings to your skin, making it challenging to stay warm and comfortable while exploring the surroundings.

March Average Humidity in Houston

This chart illustrates the average monthly humidity levels in Houston, 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 Houston is approximately 91%, 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 Houston

In Houston in March, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Houston, you can check the information here.

Maximum UV Index Levels in Houston for March

The chart shows the monthly maximum UV Index (UVI) for Houston 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 Houston typically reaches 3, which falls under the moderate exposure category.

Data source: Houston 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 Houston Compares to Other Months

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

This table compares monthly weather conditions in Houston, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-12°C (11°F)	38 mm (1.5 inches)	94%	low
February Weather	-9°C (16°F)	49 mm (1.9 inches)	93%	low
March Weather	-6°C (21°F)	42 mm (1.7 inches)	91%	moderate
April Weather	2°C (36°F)	43 mm (1.7 inches)	85%	moderate
May Weather	9°C (48°F)	99 mm (3.9 inches)	88%	high
June Weather	13°C (55°F)	98 mm (3.9 inches)	95%	high
July Weather	15°C (60°F)	103 mm (4.0 inches)	102%	high
August Weather	13°C (56°F)	152 mm (6.0 inches)	100%	moderate
September Weather	9°C (48°F)	106 mm (4.2 inches)	96%	moderate
October Weather	2°C (37°F)	109 mm (4.3 inches)	91%	low
November Weather	-7°C (20°F)	63 mm (2.5 inches)	95%	low
December Weather	-8°C (18°F)	76 mm (3.0 inches)	96%	low