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June Weather in South Portland, United States

Last updated: June 24, 2025

In June, the average temperature in South Portland, United States is a pleasant 17°C (62°F), with highs reaching up to 28°C (83°F) and lows dipping to 8°C (47°F). Expect about 80 mm (3.2 in) of precipitation over 9 days, complemented by an average humidity level of 72%.

June Temperature in South Portland

In June in South Portland, the average temperature is 17°C (62°F). Maximum temperatures can reach 28°C (83°F), while minimum temperatures can drop to as low as 8°C (47°F). This mild climate makes South Portland an ideal destination for travelers looking to enjoy comfortable weather while exploring.

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

The chart illustrates June 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, June typically has an average temperature of 17°C (62°F), with highs reaching up to 28°C (83°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec282934435262686963544232
Data source: Temperature data for South Portland generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

June Precipitation in South Portland

In South Portland in June, the total precipitation amount is 80 mm (3.2 in) over the course of 9 days.

June Precipitation Trends in South Portland

The chart displays monthly precipitation patterns in South Portland, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In South Portland, June typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec971039114994801237577163130144
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in South Portland

In South Portland in June humidity is 72%. With an average temperature of 17°C (62°F), this humidity feels like a warm embrace, making it perfect for leisurely strolls but potentially heavy on the skin, prompting travelers to seek shade during midday excursions.

June Average Humidity in South Portland

This chart illustrates the average monthly humidity levels in South Portland, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in South Portland is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in South Portland

In South Portland in June, 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 South Portland.

Maximum UV Index Levels in South Portland for June

The chart shows the monthly maximum UV Index (UVI) for South Portland in June, 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 June, the maximum UV index in South Portland typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: South Portland June 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 June 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 June’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 June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
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 Weather1°C (34°F)91 mm (3.6 inches)82%moderate
April Weather6°C (43°F)149 mm (5.9 inches)80%high
May Weather11°C (52°F)94 mm (3.7 inches)72%very high
June Weather17°C (62°F)80 mm (3.2 inches)72%very high
July Weather20°C (68°F)123 mm (4.9 inches)67%very high
August Weather20°C (69°F)75 mm (3.0 inches)66%very high
September Weather17°C (63°F)77 mm (3.0 inches)71%high
October Weather12°C (54°F)163 mm (6.4 inches)78%moderate
November Weather5°C (42°F)130 mm (5.1 inches)84%moderate
December Weather0°C (33°F)144 mm (5.7 inches)81%low

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