June Weather in Portland, United States

Last updated: June 24, 2025

In June, the average temperature in Portland, United States is a delightful 17°C (63°F). Expect temperatures to range from a cool 8°C (46°F) to a warm 26°C (79°F). During this month, 102 mm (4.0 in) of precipitation typically falls over about 12 days, accompanied by an average humidity level of 79%. Enjoy your time in this picturesque locale!

June Temperature in Portland

In June in Portland, the average temperature is 17°C (63°F). Maximums can reach 26°C (79°F), and minimums can be as low as 8°C (46°F). This mild climate makes Portland an ideal destination for travelers seeking comfortable weather for outdoor activities.

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 17°C (63°F), with highs reaching up to 26°C (79°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec292934415163717166564235
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 total precipitation amount is 102 mm (4.0 in), occurring over a span of 12 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 102 mm (4.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec9898951121111021268588151125128
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 79%. With an average temperature of 17°C (63°F), this humidity feels like a warm, muggy embrace, making outdoor activities less comfortable and prompting travelers to seek shaded areas or cool refreshments more frequently.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec24689101098642
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 Weather-2°C (29°F)98 mm (3.9 inches)91%low
February Weather-1°C (30°F)98 mm (3.9 inches)91%moderate
March Weather1°C (34°F)95 mm (3.7 inches)88%high
April Weather5°C (41°F)112 mm (4.4 inches)88%very high
May Weather11°C (52°F)111 mm (4.4 inches)82%very high
June Weather17°C (63°F)102 mm (4.0 inches)79%very high
July Weather22°C (72°F)125 mm (4.9 inches)77%very high
August Weather22°C (71°F)85 mm (3.3 inches)72%very high
September Weather19°C (66°F)88 mm (3.5 inches)76%very high
October Weather13°C (56°F)151 mm (5.9 inches)83%high
November Weather6°C (43°F)125 mm (4.9 inches)88%moderate
December Weather2°C (36°F)128 mm (5.0 inches)87%low

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