August Weather in Port Saint John, United States

Last updated: June 24, 2025

In August, the average temperature in Port Saint John, United States hovers around 28°C (82°F), with minimums dipping to 24°C (76°F) and maximums soaring to 32°C (90°F). Expect significant moisture as well, with 220 mm (8.7 in) of precipitation spread over 26 days, resulting in an average humidity of a stifling 81%.

August Temperature in Port Saint John

In August in Port Saint John, the average temperature is 28°C (82°F). Maximums can reach 32°C (90°F), while minimums can drop to as low as 24°C (76°F). This pleasant climate makes it an ideal destination for travelers seeking warmth and sunshine.

August Weather in Port Saint John: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Port Saint John, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Saint John, August typically has an average temperature of 28°C (82°F), with highs reaching up to 32°C (90°F) and lows dropping to around 24°C (76°F).

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

August Precipitation in Port Saint John

In Port Saint John in August, the precipitation amount is 220 mm (8.7 in) over the course of 26 days.

August Precipitation Trends in Port Saint John

The chart displays monthly precipitation patterns in Port Saint John, 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 Port Saint John, August typically receives around 220 mm (8.7 inches) of precipitation spread over approximately 26 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Port Saint John

In Port Saint John in August, humidity is 81%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket wrapped around you, making traveling somewhat uncomfortable as the air thickens, leaving you longing for a refreshing breeze.

August Average Humidity in Port Saint John

This chart illustrates the average monthly humidity levels in Port Saint John, 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 Port Saint John is approximately 81%, 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 Port Saint John

In Port Saint John in August, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Port Saint John.

Maximum UV Index Levels in Port Saint John for August

The chart shows the monthly maximum UV Index (UVI) for Port Saint John 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 Port Saint John typically reaches 11, which falls under the extreme exposure category.

Data source: Port Saint John 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 Port Saint John Compares to Other Months

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

This table compares monthly weather conditions in Port Saint John, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (64°F)	38 mm (1.5 inches)	83%	high
February Weather	19°C (67°F)	51 mm (2.0 inches)	80%	very high
March Weather	20°C (69°F)	25 mm (1.0 inches)	75%	very high
April Weather	23°C (73°F)	72 mm (2.8 inches)	70%	extreme
May Weather	25°C (77°F)	124 mm (4.9 inches)	68%	extreme
June Weather	26°C (80°F)	164 mm (6.4 inches)	75%	extreme
July Weather	27°C (82°F)	172 mm (6.8 inches)	79%	extreme
August Weather	28°C (82°F)	220 mm (8.7 inches)	81%	extreme
September Weather	27°C (81°F)	189 mm (7.4 inches)	83%	extreme
October Weather	26°C (78°F)	107 mm (4.2 inches)	81%	very high
November Weather	22°C (71°F)	62 mm (2.4 inches)	82%	high
December Weather	19°C (66°F)	65 mm (2.6 inches)	84%	moderate