March Weather in Decatur, United States

Last updated: June 24, 2025

In Decatur, United States, the average temperature in March hovers around 13°C (56°F). You can expect a minimum temperature of -4°C (25°F) and a maximum of 29°C (84°F), offering a wide range for outdoor activities. During this month, precipitation totals around 178 mm (7.0 in) over approximately 13 days, contributing to an average humidity level of 85%. Be prepared for a mix of weather that can influence your plans!

March Temperature in Decatur

In March in Decatur, the average temperature is 13°C (56°F). Maximum temperatures can reach 29°C (84°F), while minimums can drop as low as -4°C (25°F). This range of temperatures makes Decatur a destination for both warm-weather enthusiasts and those who appreciate the chill, so be sure to pack for varying conditions.

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

The chart illustrates March temperature patterns in Decatur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Decatur, March typically has an average temperature of 13°C (56°F), with highs reaching up to 29°C (84°F) and lows dropping to around -4°C (25°F).

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

March Precipitation in Decatur

In Decatur in March, the precipitation amount is 178 mm (7.0 in) over a duration of 13 days.

March Precipitation Trends in Decatur

The chart displays monthly precipitation patterns in Decatur, 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 Decatur, March typically receives around 178 mm (7.0 inches) of precipitation spread over approximately 13 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 Decatur

In Decatur in March humidity is 85%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill that wraps around you, making outdoor activities feel heavier and less enjoyable, as layers of clothing cling to the skin and breath becomes visible in the moist air.

March Average Humidity in Decatur

This chart illustrates the average monthly humidity levels in Decatur, 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 Decatur 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 Decatur

In Decatur in March, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Decatur.

Maximum UV Index Levels in Decatur for March

The chart shows the monthly maximum UV Index (UVI) for Decatur 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 Decatur typically reaches 8, which falls under the very high exposure category.

Data source: Decatur 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 Decatur Compares to Other Months

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

This table compares monthly weather conditions in Decatur, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	110 mm (4.3 inches)	87%	moderate
February Weather	10°C (50°F)	181 mm (7.1 inches)	87%	high
March Weather	13°C (56°F)	178 mm (7.0 inches)	85%	very high
April Weather	17°C (62°F)	146 mm (5.8 inches)	82%	very high
May Weather	22°C (72°F)	108 mm (4.2 inches)	83%	extreme
June Weather	25°C (77°F)	147 mm (5.8 inches)	82%	extreme
July Weather	27°C (81°F)	105 mm (4.1 inches)	78%	extreme
August Weather	26°C (80°F)	112 mm (4.4 inches)	67%	very high
September Weather	24°C (76°F)	111 mm (4.4 inches)	64%	very high
October Weather	19°C (66°F)	122 mm (4.8 inches)	74%	high
November Weather	11°C (51°F)	74 mm (2.9 inches)	87%	moderate
December Weather	9°C (48°F)	152 mm (6.0 inches)	88%	moderate