July Weather in South Portland, United States

Last updated: June 24, 2025

In South Portland, United States, the average temperature in July hovers around 20°C (68°F). Expect a minimum of 13°C (56°F) and a pleasant maximum of 28°C (83°F). During this month, precipitation averages 123 mm (4.9 in) spread across 12 days, with an average humidity of 67%. Enjoy the mild weather, but be prepared for the occasional rain!

July Temperature in South Portland

In July in South Portland, the average temperature is 20°C (68°F). The maximum can reach 28°C (83°F) and the minimum can be as low as 13°C (56°F). This pleasant climate makes South Portland an ideal destination for travelers seeking comfortable weather and enjoyable outdoor activities.

July Weather in South Portland: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in South Portland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Portland, July typically has an average temperature of 20°C (68°F), with highs reaching up to 28°C (83°F) and lows dropping to around 13°C (56°F).

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

July Precipitation in South Portland

In South Portland in July, the precipitation amount is 123 mm (4.9 in) over the course of 12 days.

July Precipitation Trends in South Portland

The chart displays monthly precipitation patterns in South Portland, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In South Portland, July typically receives around 123 mm (4.9 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in South Portland

In South Portland in July humidity is 67%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making travel comfortable yet slightly sticky, as the air clings to your skin and invites you to enjoy the sights at a leisurely pace.

July Average Humidity in South Portland

This chart illustrates the average monthly humidity levels in South Portland, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in South Portland is approximately 67%, offering insight into how humid the weather typically is during this month.

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

July UV Index in South Portland

In South Portland in July, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in South Portland.

Maximum UV Index Levels in South Portland for July

The chart shows the monthly maximum UV Index (UVI) for South Portland in July, 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 July, the maximum UV index in South Portland typically reaches 9, which falls under the very high exposure category.

Data source: South Portland July 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 July Weather in South Portland Compares to Other Months

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

This table compares monthly weather conditions in South Portland, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	97 mm (3.8 inches)	86%	low
February Weather	-2°C (29°F)	103 mm (4.1 inches)	84%	moderate
March Weather	1°C (34°F)	91 mm (3.6 inches)	82%	moderate
April Weather	6°C (43°F)	149 mm (5.9 inches)	80%	high
May Weather	11°C (52°F)	94 mm (3.7 inches)	72%	very high
June Weather	17°C (62°F)	80 mm (3.2 inches)	72%	very high
July Weather	20°C (68°F)	123 mm (4.9 inches)	67%	very high
August Weather	20°C (69°F)	75 mm (3.0 inches)	66%	very high
September Weather	17°C (63°F)	77 mm (3.0 inches)	71%	high
October Weather	12°C (54°F)	163 mm (6.4 inches)	78%	moderate
November Weather	5°C (42°F)	130 mm (5.1 inches)	84%	moderate
December Weather	0°C (33°F)	144 mm (5.7 inches)	81%	low