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June Weather in Portland, United States

Last updated: June 24, 2025

In June, the average temperature in Portland, United States hovers around 21°C (70°F). Expect a range from a cool 7°C (44°F) to a sizzling 34°C (93°F). This month also brings 106 mm (4.2 in) of precipitation spread over 12 days, contributing to an average humidity of 81%. Stay prepared for both warmth and moisture!

June Temperature in Portland

In June in Portland, the average temperature is 21°C (70°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 7°C (44°F). This pleasant climate makes Portland an ideal destination for travelers seeking a comfortable escape during this time of year.

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 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec262737476070757265533832
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 106 mm (4.2 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 106 mm (4.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec6771688713610682681081276463
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 81%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace, making outdoor activities slightly uncomfortable and necessitating frequent breaks in the shade or air conditioning for a refreshing escape.

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 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
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-3°C (26°F)67 mm (2.6 inches)87%low
February Weather-3°C (27°F)71 mm (2.8 inches)87%moderate
March Weather3°C (37°F)68 mm (2.7 inches)86%moderate
April Weather8°C (47°F)87 mm (3.4 inches)87%very high
May Weather15°C (60°F)136 mm (5.4 inches)82%very high
June Weather21°C (70°F)106 mm (4.2 inches)81%very high
July Weather24°C (75°F)82 mm (3.2 inches)78%very high
August Weather22°C (72°F)68 mm (2.7 inches)79%very high
September Weather18°C (65°F)108 mm (4.3 inches)79%high
October Weather12°C (53°F)127 mm (5.0 inches)82%moderate
November Weather4°C (39°F)64 mm (2.5 inches)87%moderate
December Weather0°C (32°F)63 mm (2.5 inches)86%low

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