June is one of the cooler months of the year in Portland, with average highs near 13.8°C and lows around 11.1°C (mean 12.5°C). It is a relatively wet time of year, averaging 87 mm of rainfall and 79% relative humidity across the period.
June is one of the cooler months of the year in Portland. Across 45 years of records, the warmest June in Portland was 2001 — when the month averaged 13.5°C — while the coldest were 1981, 1982 and 1989 at 11.5°C. Typical June days reach 13.8°C with nights near 11.1°C. The long-term trend is warming, about 0.2°C per decade.
June is a relatively wet time of year in Portland, averaging 87 mm of rainfall. The wettest June on record was 2004 with 168 mm, while the driest was 2017 at 24 mm.
Relative humidity in Portland during June averages 79%. The most humid June was 1991 at 84%, and the least humid was 2024 at 73%.
June receives about 1.7 kWh/m²/day of solar energy in Portland. The sunniest Junes were 1994, 2006 and 2025, among others at 1.9 kWh/m²/day, and the cloudiest were 2004 and 2014 at 1.5.
Average wind speed in Portland during June is 5.8 m/s. The windiest June was 2004 at 7.5 m/s, while the calmest was 2017 at 4.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.0°C | 12.3°C | 12.7°C | 12.6°C | 12.7°C | +0.7°C |
| Avg High | 13.4°C | 13.7°C | 14.0°C | 13.9°C | 14.0°C | +0.6°C |
| Avg Low | 10.6°C | 10.9°C | 11.4°C | 11.2°C | 11.3°C | +0.7°C |
| Avg Rain | 90 mm | 96 mm | 90 mm | 82 mm | 70 mm | -20 mm |
June temperatures in Portland have risen by about 0.9°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 6.5°C (1981) to a record high of 20.1°C (2005).
Rainfall in June is a relatively wet time of year, averaging 87 mm, with a wettest year of 168 mm.
A quieter season to visit Portland
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Portland. That said, June — with days averaging 13.8°C and nights around 11.1°C (mean 12.5°C) and higher rainfall (87 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 14.2°C | 12.7°C | 11.2°C | 18.1°C | 9.0°C | 94 mm | 75% | 5.9 m/s | 1.9 |
| 2024 | 13.5°C | 12.3°C | 11.1°C | 16.3°C | 9.4°C | 25 mm | 73% | 4.6 m/s | 1.6 |
| 2023 | 14.5°C | 13.1°C | 11.7°C | 18.3°C | 8.3°C | 113 mm | 79% | 6.8 m/s | 1.6 |
| 2022 | 13.7°C | 12.5°C | 11.3°C | 15.9°C | 8.4°C | 74 mm | 79% | 6.6 m/s | 1.6 |
| 2021 | 14.5°C | 12.9°C | 11.4°C | 18.6°C | 9.4°C | 71 mm | 80% | 5.6 m/s | 1.7 |
| 2020 | 13.8°C | 12.4°C | 11.0°C | 16.7°C | 8.6°C | 47 mm | 77% | 5.1 m/s | 1.8 |
| 2019 | 14.3°C | 12.7°C | 11.1°C | 17.5°C | 7.7°C | 72 mm | 78% | 5.7 m/s | 1.8 |
| 2018 | 13.9°C | 12.5°C | 11.2°C | 17.4°C | 9.4°C | 60 mm | 76% | 5.3 m/s | 1.7 |
| 2017 | 13.8°C | 12.5°C | 11.2°C | 16.1°C | 9.7°C | 24 mm | 78% | 4.1 m/s | 1.8 |
| 2016 | 13.7°C | 12.3°C | 10.8°C | 15.9°C | 8.4°C | 75 mm | 80% | 5.8 m/s | 1.7 |
| 2015 | 13.5°C | 12.2°C | 10.9°C | 17.5°C | 6.6°C | 52 mm | 80% | 5.3 m/s | 1.6 |
| 2014 | 14.5°C | 13.2°C | 11.9°C | 16.7°C | 9.1°C | 133 mm | 82% | 6.1 m/s | 1.5 |
| 2013 | 14.4°C | 13.1°C | 11.8°C | 16.6°C | 9.8°C | 86 mm | 79% | 5.4 m/s | 1.7 |
| 2012 | 13.3°C | 12.2°C | 11.0°C | 15.8°C | 7.4°C | 137 mm | 78% | 6.3 m/s | 1.6 |
| 2011 | 13.9°C | 12.5°C | 11.0°C | 17.6°C | 9.0°C | 96 mm | 80% | 6.5 m/s | 1.8 |
| 2010 | 13.5°C | 12.3°C | 11.0°C | 16.4°C | 8.7°C | 91 mm | 78% | 5.1 m/s | 1.8 |
| 2009 | 14.2°C | 12.7°C | 11.2°C | 16.7°C | 9.4°C | 116 mm | 80% | 4.9 m/s | 1.8 |
| 2008 | 14.6°C | 13.3°C | 12.1°C | 15.8°C | 9.9°C | 59 mm | 79% | 6.2 m/s | 1.7 |
| 2007 | 12.9°C | 12.1°C | 11.2°C | 14.3°C | 8.5°C | 87 mm | 77% | 5.4 m/s | 1.7 |
| 2006 | 13.2°C | 11.9°C | 10.5°C | 15.5°C | 7.7°C | 33 mm | 78% | 4.7 m/s | 1.9 |
| 2005 | 15.0°C | 13.2°C | 11.4°C | 20.1°C | 8.7°C | 88 mm | 78% | 5 m/s | 1.8 |
| 2004 🌧️ | 13.7°C | 12.4°C | 11.1°C | 17.8°C | 9.8°C | 168 mm | 79% | 7.5 m/s | 1.5 |
| 2003 | 13.8°C | 12.5°C | 11.2°C | 17.2°C | 7.3°C | 118 mm | 80% | 6.4 m/s | 1.7 |
| 2002 | 14.3°C | 12.9°C | 11.5°C | 16.9°C | 9.1°C | 95 mm | 76% | 7 m/s | 1.8 |
| 2001 🔥 | 14.8°C | 13.5°C | 12.1°C | 17.9°C | 9.8°C | 68 mm | 80% | 6 m/s | 1.7 |
| 2000 | 13.8°C | 12.6°C | 11.4°C | 16.5°C | 10.0°C | 71 mm | 79% | 6.1 m/s | 1.7 |
| 1999 | 13.9°C | 12.5°C | 11.0°C | 17.5°C | 7.2°C | 75 mm | 79% | 5.9 m/s | 1.8 |
| 1998 | 13.3°C | 11.9°C | 10.4°C | 19.0°C | 8.2°C | 107 mm | 77% | 6.1 m/s | 1.6 |
| 1997 | 14.1°C | 12.7°C | 11.2°C | 18.5°C | 8.6°C | 41 mm | 78% | 5.8 m/s | 1.6 |
| 1996 | 13.8°C | 12.4°C | 10.9°C | 17.0°C | 8.7°C | 116 mm | 80% | 5.5 m/s | 1.7 |
| 1995 | 13.2°C | 12.0°C | 10.7°C | 17.2°C | 7.6°C | 96 mm | 81% | 6.3 m/s | 1.7 |
| 1994 | 13.6°C | 12.3°C | 11.1°C | 16.5°C | 8.1°C | 83 mm | 79% | 5.6 m/s | 1.9 |
| 1993 | 13.2°C | 12.0°C | 10.7°C | 15.7°C | 8.2°C | 83 mm | 79% | 6.1 m/s | 1.7 |
| 1992 | 12.8°C | 11.7°C | 10.6°C | 15.0°C | 8.5°C | 96 mm | 82% | 5.6 m/s | 1.6 |
| 1991 | 14.7°C | 13.3°C | 11.9°C | 16.8°C | 9.3°C | 151 mm | 84% | 6 m/s | 1.6 |
| 1990 | 13.9°C | 12.4°C | 10.8°C | 17.1°C | 7.3°C | 108 mm | 78% | 6.3 m/s | 1.7 |
| 1989 | 12.9°C | 11.5°C | 10.2°C | 15.3°C | 7.9°C | 105 mm | 81% | 5.6 m/s | 1.7 |
| 1988 | 14.4°C | 12.9°C | 11.4°C | 19.1°C | 9.4°C | 102 mm | 81% | 6.1 m/s | 1.8 |
| 1987 | 13.9°C | 12.4°C | 10.8°C | 17.7°C | 8.3°C | 84 mm | 83% | 5.1 m/s | 1.8 |
| 1986 | 13.0°C | 11.8°C | 10.7°C | 15.2°C | 9.1°C | 86 mm | 79% | 5.4 m/s | 1.8 |
| 1985 | 13.1°C | 11.9°C | 10.6°C | 15.5°C | 8.9°C | 104 mm | 79% | 6.1 m/s | 1.8 |
| 1984 | 13.9°C | 12.5°C | 11.0°C | 17.3°C | 7.6°C | 50 mm | 78% | 5.6 m/s | 1.9 |
| 1983 | 13.1°C | 11.7°C | 10.3°C | 15.8°C | 8.5°C | 100 mm | 81% | 5.6 m/s | — |
| 1982 | 13.0°C | 11.5°C | 10.1°C | 15.3°C | 7.5°C | 75 mm | 77% | 5.3 m/s | — |
| 1981 ❄️ | 13.0°C | 11.5°C | 10.0°C | 16.4°C | 6.5°C | 106 mm | 80% | 6.1 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 13.8°C with lows near 11.1°C (mean 12.5°C), based on 45 years of NASA POWER data.
June averages 87 mm of rainfall in Portland, a relatively wet time of year. The wettest on record was 168 mm in 2004.
The hottest June reached 20.1°C in 2005. The coldest dipped to 6.5°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 0.9°C. Daytime highs moved from 13.2°C to 14.1°C and overnight lows from 10.4°C to 11.3°C over the same span.
June is one of the cooler months of the year in Portland and a relatively wet time of year, so plan for around 13.8°C daytime highs and 11.1°C at night.
Not quite — June is the 4th coolest month in Portland, averaging 12.5°C.
For June in Portland, pack light layers you can adjust through the day, with typical highs of 13.8°C and lows of 11.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 79% — quite humid.
Average wind speed in June is 5.8 m/s. The windiest June on record averaged 7.5 m/s (2004).
The wettest June on record was 2004 with 168 mm. On average, June sees 87 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Portland behaves each June, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for June specifically, along with year-by-year records and how the month has changed over the decades.
