March Weather in Sussex, United States

Last updated: June 24, 2025

In March, the average temperature in Sussex, United States hovers around 10°C (51°F). However, be prepared for a range, as it can dip to a brisk -5°C (23°F) or rise to a warm 30°C (87°F). Expect 85 mm (3.4 in) of precipitation spread over 9 days, with an average humidity level of 82%.

March Temperature in Sussex

In March in Sussex, the average temperature is 10°C (51°F). The maximum can reach 30°C (87°F), and the minimum can be as low as -5°C (23°F). This variation in temperature makes it essential for travelers to pack layers to accommodate both warm and cool conditions.

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

The chart illustrates March temperature patterns in Sussex, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sussex, March typically has an average temperature of 10°C (51°F), with highs reaching up to 30°C (87°F) and lows dropping to around -5°C (23°F).

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

March Precipitation in Sussex

In Sussex in March, the total precipitation amount is 85 mm (3.4 in) recorded over a span of 9 days.

March Precipitation Trends in Sussex

The chart displays monthly precipitation patterns in Sussex, 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 Sussex, March typically receives around 85 mm (3.4 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 Sussex

In Sussex in March humidity is 82%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that clings to your skin, making outdoor adventures less appealing and prompting travelers to seek cozy indoor activities or warm drinks to counter the brisk air.

March Average Humidity in Sussex

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

In Sussex 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 Sussex.

Maximum UV Index Levels in Sussex for March

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

Data source: Sussex 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 Sussex Compares to Other Months

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

This table compares monthly weather conditions in Sussex, 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)	84 mm (3.3 inches)	84%	moderate
February Weather	8°C (47°F)	105 mm (4.2 inches)	83%	high
March Weather	10°C (51°F)	85 mm (3.4 inches)	82%	high
April Weather	16°C (61°F)	109 mm (4.3 inches)	81%	very high
May Weather	21°C (69°F)	115 mm (4.5 inches)	80%	very high
June Weather	24°C (76°F)	116 mm (4.6 inches)	82%	very high
July Weather	27°C (81°F)	124 mm (4.9 inches)	81%	extreme
August Weather	26°C (79°F)	161 mm (6.3 inches)	81%	very high
September Weather	23°C (74°F)	113 mm (4.4 inches)	78%	very high
October Weather	18°C (65°F)	104 mm (4.1 inches)	80%	very high
November Weather	10°C (51°F)	78 mm (3.1 inches)	84%	moderate
December Weather	7°C (45°F)	89 mm (3.5 inches)	84%	moderate