May Weather in Roseau, United States

Last updated: June 24, 2025

In Roseau, United States, the average temperature in May hovers around 12°C (54°F). Expect a chilly minimum of -5°C (23°F) and a warm maximum reaching 32°C (90°F). With about 60 mm (2.4 in) of rain spread over 8 days, you might want to bring an umbrella! The air tends to be quite moist, with an average humidity level of 74%.

May Temperature in Roseau

In May in Roseau, the average temperature is 12°C (54°F), with maximums reaching up to 32°C (90°F) and minimums dropping as low as -5°C (23°F). Travelers should be prepared for a wide range of weather conditions, making versatile clothing essential for an enjoyable visit.

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

The chart illustrates May temperature patterns in Roseau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Roseau, May typically has an average temperature of 12°C (54°F), with highs reaching up to 32°C (90°F) and lows dropping to around -5°C (23°F).

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

May Precipitation in Roseau

In Roseau in May, the total precipitation amount is 60 mm (2.4 in) spread over the course of 8 days.

May Precipitation Trends in Roseau

The chart displays monthly precipitation patterns in Roseau, 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 Roseau, May typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 8 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 Roseau

In Roseau in May, humidity is 74%. With an average temperature of 12°C (54°F), this humidity feels like a chilly embrace that can dampen your travel experience, making it essential to dress in layers and prepare for an unexpected drizzle while exploring the sights.

May Average Humidity in Roseau

This chart illustrates the average monthly humidity levels in Roseau, 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 Roseau is approximately 74%, 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 Roseau

In Roseau in May, 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 Roseau.

Maximum UV Index Levels in Roseau for May

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

Data source: Roseau 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 Roseau Compares to Other Months

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

This table compares monthly weather conditions in Roseau, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-14°C (8°F)	20 mm (0.8 inches)	94%	low
February Weather	-15°C (6°F)	22 mm (0.9 inches)	91%	moderate
March Weather	-4°C (25°F)	23 mm (0.9 inches)	90%	moderate
April Weather	3°C (37°F)	38 mm (1.5 inches)	81%	high
May Weather	12°C (54°F)	60 mm (2.4 inches)	74%	very high
June Weather	19°C (66°F)	80 mm (3.2 inches)	75%	very high
July Weather	21°C (70°F)	74 mm (2.9 inches)	74%	very high
August Weather	19°C (66°F)	74 mm (2.9 inches)	77%	very high
September Weather	14°C (57°F)	80 mm (3.1 inches)	75%	high
October Weather	5°C (42°F)	82 mm (3.2 inches)	78%	moderate
November Weather	-4°C (24°F)	30 mm (1.2 inches)	87%	low
December Weather	-10°C (14°F)	34 mm (1.3 inches)	93%	low