March Weather in Onset, United States

Last updated: June 24, 2025

In March, the average temperature in Onset, United States hovers around 4°C (39°F). Expect a chilly minimum of -12°C (11°F), while sunny days can reach up to a mild 18°C (65°F). With an average humidity of 82%, prepare for a damp atmosphere complemented by 107 mm (4.2 in) of precipitation over approximately 10 days.

March Temperature in Onset

In March, in Onset, the average temperature is 4°C (39°F), with maximums reaching up to 18°C (65°F) and minimums dropping as low as -12°C (11°F). This range suggests that travelers should prepare for a mix of mild and chilly weather, making it essential to pack layers for their visit.

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

The chart illustrates March temperature patterns in Onset, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onset, March typically has an average temperature of 4°C (39°F), with highs reaching up to 18°C (65°F) and lows dropping to around -12°C (11°F).

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

March Precipitation in Onset

In Onset in March, the precipitation amount is 107 mm (4.2 in) accumulated over a period of 10 days.

March Precipitation Trends in Onset

The chart displays monthly precipitation patterns in Onset, 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 Onset, March typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 10 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 Onset

In Onset in March, humidity is 82%. With an average temperature of 4°C (39°F), this humidity feels like a chill that seeps into your bones, making it uncomfortable for traveling as you find yourself bundled up, yet still damp and cold.

March Average Humidity in Onset

This chart illustrates the average monthly humidity levels in Onset, 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 Onset is approximately 82%, 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 Onset

In Onset in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Onset, you can refer to this Hourly UV Index in Onset.

Maximum UV Index Levels in Onset for March

The chart shows the monthly maximum UV Index (UVI) for Onset 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 Onset typically reaches 6, which falls under the high exposure category.

Data source: Onset 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 Onset Compares to Other Months

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

This table compares monthly weather conditions in Onset, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	82 mm (3.2 inches)	84%	moderate
February Weather	2°C (36°F)	97 mm (3.8 inches)	84%	moderate
March Weather	4°C (39°F)	107 mm (4.2 inches)	82%	high
April Weather	9°C (48°F)	122 mm (4.8 inches)	79%	very high
May Weather	14°C (57°F)	98 mm (3.9 inches)	75%	very high
June Weather	19°C (67°F)	90 mm (3.5 inches)	78%	very high
July Weather	23°C (74°F)	102 mm (4.0 inches)	76%	very high
August Weather	23°C (74°F)	81 mm (3.2 inches)	76%	very high
September Weather	19°C (67°F)	102 mm (4.0 inches)	75%	very high
October Weather	14°C (58°F)	143 mm (5.6 inches)	75%	high
November Weather	8°C (46°F)	93 mm (3.7 inches)	80%	moderate
December Weather	3°C (38°F)	116 mm (4.6 inches)	80%	low