May Weather in Sussex, United States

Last updated: June 24, 2025

In Sussex, United States, the average temperature in May hovers around 21°C (69°F). Expect a minimum of 2°C (36°F) and a maximum of 36°C (98°F). During this month, precipitation typically totals 115 mm (4.5 in) over about 10 days, with an average humidity of 80%.

May Temperature in Sussex

In May in Sussex, the average temperature is 21°C (69°F). Maximum temperatures can reach 36°C (98°F), while minimums can drop as low as 2°C (36°F). This variability makes it essential for travelers to pack layers and be prepared for both warm and cooler weather conditions.

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

The chart illustrates May 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, May typically has an average temperature of 21°C (69°F), with highs reaching up to 36°C (98°F) and lows dropping to around 2°C (36°F).

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

May Precipitation in Sussex

In Sussex in May, the precipitation amount is 115 mm (4.5 in) over a span of 10 days.

May Precipitation Trends in Sussex

The chart displays monthly precipitation patterns in Sussex, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Sussex, May typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Sussex

In Sussex in May, humidity is 80%. With an average temperature of 21°C (69°F), this humidity feels like a warm, sticky embrace, making outdoor activities a bit challenging for travelers as the air becomes heavy and can lead to fatigue while sightseeing.

May Average Humidity in Sussex

This chart illustrates the average monthly humidity levels in Sussex, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Sussex is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Sussex

In Sussex in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Sussex.

Maximum UV Index Levels in Sussex for May

The chart shows the monthly maximum UV Index (UVI) for Sussex in May, 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 May, the maximum UV index in Sussex typically reaches 10, which falls under the very high exposure category.

Data source: Sussex May 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 May 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 May’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 May’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