August Weather in Roseau, United States

Last updated: June 24, 2025

In August, the average temperature in Roseau, United States hovers around 19°C (66°F). Expect a temperature range that can dip as low as 4°C (40°F) and soar up to 35°C (94°F). With an average precipitation of 74 mm (2.9 in) spread over 9 days, the average humidity sits at a comfortable 77%. Embrace the dynamic climate as you experience all that this vibrant location has to offer!

August Temperature in Roseau

In August in Roseau, the average temperature is 19°C (66°F). Maximums can reach 35°C (94°F), while minimums can be as low as 4°C (40°F). This variability in temperature makes it essential for travelers to pack a versatile wardrobe to enjoy their time outdoors comfortably.

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

The chart illustrates August 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, August typically has an average temperature of 19°C (66°F), with highs reaching up to 35°C (94°F) and lows dropping to around 4°C (40°F).

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

August Precipitation in Roseau

In Roseau in August, the precipitation amount is 74 mm (2.9 in), which occurs over a span of 9 days.

August Precipitation Trends in Roseau

The chart displays monthly precipitation patterns in Roseau, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Roseau, August typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Roseau

In Roseau in August, humidity is 77%. With an average temperature of 19°C (66°F), this humidity feels like a heavy blanket wrapping around you, making the air feel thick and sticky, which can be quite uncomfortable for traveling.

August Average Humidity in Roseau

This chart illustrates the average monthly humidity levels in Roseau, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Roseau is approximately 77%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Roseau

In Roseau in August, 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 August

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

Data source: Roseau August 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 August 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 August’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 August’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