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June Weather in Portland, United States

Last updated: June 24, 2025

In Portland, United States, the average temperature in June hovers around 28°C (83°F). The climate can vary significantly, with temperatures dipping as low as 20°C (69°F) and soaring to a sizzling 37°C (98°F). Expect 136 mm (5.4 in) of precipitation spread over 13 days, contributing to an average humidity of 77%. Stay prepared for a warm and humid month! 🌦️

June Temperature in Portland

In June in Portland, the average temperature is 28°C (83°F). Maximums can reach 37°C (98°F) and minimums can drop to as low as 20°C (69°F). It's an ideal time for travelers who enjoy warm weather and 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 28°C (83°F), with highs reaching up to 37°C (98°F) and lows dropping to around 20°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec586068737983848482756661
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 reaches 136 mm (5.4 in) over a span of 13 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 136 mm (5.4 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec3931524413813610181141775247
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 77%. With an average temperature of 28°C (83°F), this humidity feels like walking through a warm, damp blanket, making outdoor activities more challenging and requiring frequent hydration breaks for travelers.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%82%79%82%81%77%78%78%79%77%78%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 is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For 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 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121211975
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 Weather14°C (58°F)39 mm (1.5 inches)78%moderate
February Weather16°C (60°F)31 mm (1.2 inches)82%very high
March Weather20°C (68°F)52 mm (2.1 inches)79%very high
April Weather23°C (73°F)44 mm (1.7 inches)82%extreme
May Weather26°C (79°F)138 mm (5.4 inches)81%extreme
June Weather28°C (83°F)136 mm (5.4 inches)77%extreme
July Weather29°C (84°F)101 mm (4.0 inches)78%extreme
August Weather29°C (85°F)81 mm (3.2 inches)78%extreme
September Weather28°C (82°F)141 mm (5.6 inches)79%extreme
October Weather24°C (75°F)77 mm (3.0 inches)77%very high
November Weather19°C (66°F)51 mm (2.0 inches)78%high
December Weather16°C (61°F)47 mm (1.9 inches)80%moderate

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