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June Weather in Portland, United States

Last updated: June 24, 2025

In June, the average temperature in Portland, United States is a pleasant 20°C (69°F). However, temperatures can vary significantly, with a minimum of 7°C (45°F) and a maximum reaching 35°C (96°F). Visitors should also be prepared for 94 mm (3.7 in) of precipitation across 11 days, contributing to an average humidity of around 69%.

June Temperature in Portland

In June in Portland, the average temperature is 20°C (69°F). The maximum can reach 35°C (96°F), while the minimum can dip to as low as 7°C (45°F). Be prepared for warm days and cooler evenings during your travels!

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

The chart illustrates June temperature patterns in Portland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portland, June typically has an average temperature of 20°C (69°F), with highs reaching up to 35°C (96°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec323439495969757467574436
Data source: Temperature data for 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 Portland

In Portland in June, the precipitation amount is 94 mm (3.7 in) over the course of 11 days.

June Precipitation Trends in Portland

The chart displays monthly precipitation patterns in 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 Portland, June typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec67909012611194156969913090127
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Portland

In Portland in June humidity is 69%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping embrace, making travel feel both refreshing and slightly sticky, as you navigate the vibrant atmosphere with a pleasant sheen of perspiration glistening on your skin.

June Average Humidity in Portland

This chart illustrates the average monthly humidity levels in 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 Portland is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Portland

In 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 Portland.

Maximum UV Index Levels in Portland for June

The chart shows the monthly maximum UV Index (UVI) for 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 Portland typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: 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 Portland Compares to Other Months

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

This table compares monthly weather conditions in Portland, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)67 mm (2.6 inches)84%moderate
February Weather1°C (34°F)89 mm (3.5 inches)82%moderate
March Weather4°C (40°F)90 mm (3.6 inches)81%high
April Weather10°C (49°F)126 mm (5.0 inches)78%very high
May Weather15°C (60°F)111 mm (4.4 inches)69%very high
June Weather20°C (69°F)94 mm (3.7 inches)69%very high
July Weather24°C (75°F)156 mm (6.1 inches)62%very high
August Weather23°C (74°F)96 mm (3.8 inches)65%very high
September Weather20°C (67°F)99 mm (3.9 inches)68%very high
October Weather14°C (58°F)130 mm (5.1 inches)74%high
November Weather7°C (44°F)90 mm (3.6 inches)82%moderate
December Weather2°C (36°F)127 mm (5.0 inches)80%low

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