June is one of the warmer months of the year in Portland, with average highs near 16.8°C and lows around 13°C (mean 14.9°C). It is about average for rainfall, averaging 104 mm of rainfall and 87% relative humidity across the period.
June is one of the warmer months of the year in Portland. Across 45 years of records, the warmest June in Portland was 2021 — when the month averaged 17.5°C — while the coldest was 1982 at 13°C. Typical June days reach 16.8°C with nights near 13°C. The long-term trend is warming, about 0.3°C per decade.
June is about average for rainfall in Portland, averaging 104 mm of rainfall. The wettest June on record was 1998 with 234 mm, while the driest was 2021 at 24 mm.
Relative humidity in Portland during June averages 87%. The most humid June was 2006 at 92%, and the least humid was 2021 at 83%.
June receives about 5.7 kWh/m²/day of solar energy in Portland. The sunniest June was 1988 at 6.9 kWh/m²/day, and the cloudiest was 2006 at 4.6.
Average wind speed in Portland during June is 2.6 m/s. The windiest Junes were 1994, 1998 and 2016, among others at 2.9 m/s, while the calmest were 1983 and 2008 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.4°C | 14.8°C | 14.6°C | 15.1°C | 16.1°C | +1.7°C |
| Avg High | 16.4°C | 16.7°C | 16.4°C | 17.0°C | 17.9°C | +1.5°C |
| Avg Low | 12.3°C | 12.9°C | 12.7°C | 13.3°C | 14.3°C | +2°C |
| Avg Rain | 98 mm | 80 mm | 117 mm | 136 mm | 80 mm | -18 mm |
June temperatures in Portland have risen by about 1.7°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 7°C (1986) to a record high of 25.9°C (2025).
Rainfall in June is about average for rainfall, averaging 104 mm, with a wettest year of 234 mm.
One of the best times to visit Portland
June is one of the best times to visit Portland. Expect days averaging 16.8°C and nights around 13°C (mean 14.9°C) — warmer than Portland's yearly average — with higher rainfall (104 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 17.9°C | 16.0°C | 14.1°C | 25.9°C | 9.2°C | 39 mm | 87% | 2.4 m/s | 5.6 |
| 2024 | 18.5°C | 16.7°C | 14.9°C | 24.2°C | 11.9°C | 86 mm | 88% | 2.5 m/s | 5.7 |
| 2023 | 16.3°C | 14.7°C | 13.1°C | 20.8°C | 7.6°C | 182 mm | 91% | 2.6 m/s | 4.8 |
| 2022 | 17.3°C | 15.5°C | 13.8°C | 21.7°C | 10.7°C | 60 mm | 86% | 2.5 m/s | 6 |
| 2021 🔥 | 19.5°C | 17.5°C | 15.4°C | 25.1°C | 10.7°C | 24 mm | 83% | 2.7 m/s | 6.3 |
| 2020 | 17.9°C | 16.1°C | 14.3°C | 22.9°C | 7.9°C | 88 mm | 87% | 2.5 m/s | 6 |
| 2019 | 16.2°C | 14.3°C | 12.5°C | 19.8°C | 9.0°C | 144 mm | 88% | 2.4 m/s | 5.7 |
| 2018 | 16.7°C | 14.8°C | 12.9°C | 20.4°C | 8.6°C | 104 mm | 86% | 2.8 m/s | 6 |
| 2017 | 17.0°C | 15.1°C | 13.2°C | 22.8°C | 9.0°C | 101 mm | 88% | 2.7 m/s | 5.9 |
| 2016 | 17.2°C | 15.3°C | 13.4°C | 20.3°C | 10.2°C | 121 mm | 85% | 2.9 m/s | 6.4 |
| 2015 | 15.9°C | 14.1°C | 12.4°C | 20.4°C | 7.3°C | 162 mm | 87% | 2.8 m/s | 5.7 |
| 2014 | 17.5°C | 15.5°C | 13.6°C | 21.4°C | 9.7°C | 113 mm | 86% | 2.5 m/s | 6.2 |
| 2013 | 17.5°C | 15.7°C | 13.9°C | 23.2°C | 11.3°C | 163 mm | 89% | 2.5 m/s | 5.4 |
| 2012 | 17.1°C | 15.5°C | 13.9°C | 23.9°C | 9.7°C | 232 mm | 88% | 2.8 m/s | 5.8 |
| 2011 | 16.6°C | 14.8°C | 13.0°C | 21.1°C | 10.0°C | 90 mm | 88% | 2.5 m/s | 5.6 |
| 2010 | 18.1°C | 16.3°C | 14.5°C | 22.5°C | 11.3°C | 127 mm | 89% | 2.5 m/s | 5.3 |
| 2009 | 15.3°C | 13.7°C | 12.2°C | 18.7°C | 7.4°C | 191 mm | 90% | 2.4 m/s | 4.7 |
| 2008 | 17.2°C | 15.5°C | 13.8°C | 21.0°C | 11.0°C | 99 mm | 91% | 2.1 m/s | 5.3 |
| 2007 | 16.4°C | 14.4°C | 12.4°C | 21.6°C | 8.9°C | 85 mm | 88% | 2.4 m/s | 5.6 |
| 2006 | 16.9°C | 15.3°C | 13.8°C | 20.0°C | 10.4°C | 231 mm | 92% | 2.6 m/s | 4.6 |
| 2005 | 16.6°C | 14.3°C | 12.1°C | 21.9°C | 7.9°C | 80 mm | 92% | 2.4 m/s | 5.6 |
| 2004 | 15.6°C | 13.6°C | 11.6°C | 20.0°C | 8.1°C | 62 mm | 86% | 2.4 m/s | 6 |
| 2003 | 15.7°C | 14.0°C | 12.3°C | 22.4°C | 8.6°C | 80 mm | 89% | 2.3 m/s | 5.5 |
| 2002 | 15.9°C | 14.0°C | 12.2°C | 20.6°C | 8.4°C | 126 mm | 87% | 2.6 m/s | 5.6 |
| 2001 | 18.3°C | 16.2°C | 14.2°C | 23.4°C | 8.0°C | 136 mm | 86% | 2.2 m/s | 6 |
| 2000 | 16.4°C | 14.5°C | 12.5°C | 20.0°C | 7.4°C | 76 mm | 88% | 2.6 m/s | 5.1 |
| 1999 | 18.5°C | 16.4°C | 14.4°C | 23.1°C | 11.3°C | 33 mm | 84% | 2.4 m/s | 6.3 |
| 1998 🌧️ | 15.3°C | 13.8°C | 12.2°C | 20.4°C | 8.5°C | 234 mm | 90% | 2.9 m/s | 4.7 |
| 1997 | 17.0°C | 14.9°C | 12.8°C | 23.1°C | 8.7°C | 46 mm | 86% | 2.4 m/s | 6.4 |
| 1996 | 16.6°C | 15.0°C | 13.3°C | 20.1°C | 10.8°C | 67 mm | 89% | 2.8 m/s | 5.2 |
| 1995 | 17.2°C | 15.2°C | 13.2°C | 22.5°C | 11.5°C | 59 mm | 85% | 2.4 m/s | 6.1 |
| 1994 | 17.0°C | 15.3°C | 13.7°C | 21.5°C | 8.7°C | 45 mm | 89% | 2.9 m/s | 5.7 |
| 1993 | 16.3°C | 14.3°C | 12.2°C | 19.3°C | 7.6°C | 83 mm | 86% | 2.5 m/s | 5.9 |
| 1992 | 16.2°C | 14.2°C | 12.2°C | 20.0°C | 8.4°C | 83 mm | 87% | 2.6 m/s | 6.3 |
| 1991 | 17.3°C | 15.2°C | 13.0°C | 22.2°C | 9.6°C | 48 mm | 84% | 2.4 m/s | 5.9 |
| 1990 | 15.4°C | 13.6°C | 11.9°C | 17.9°C | 8.4°C | 96 mm | 89% | 2.7 m/s | 5.2 |
| 1989 | 16.4°C | 14.6°C | 12.8°C | 21.8°C | 10.5°C | 124 mm | 91% | 2.3 m/s | 5.2 |
| 1988 | 16.5°C | 14.4°C | 12.3°C | 21.6°C | 7.9°C | 60 mm | 83% | 2.7 m/s | 6.9 |
| 1987 | 16.8°C | 14.8°C | 12.9°C | 20.8°C | 10.3°C | 115 mm | 88% | 2.8 m/s | 5.5 |
| 1986 | 15.5°C | 13.4°C | 11.3°C | 19.3°C | 7.0°C | 99 mm | 85% | 2.9 m/s | 5.6 |
| 1985 | 15.4°C | 13.4°C | 11.3°C | 18.2°C | 8.7°C | 77 mm | 84% | 2.9 m/s | 5.2 |
| 1984 | 17.0°C | 15.0°C | 13.0°C | 21.9°C | 8.9°C | 95 mm | 89% | 2.8 m/s | 5.2 |
| 1983 | 17.2°C | 15.0°C | 12.7°C | 23.3°C | 8.6°C | 37 mm | 87% | 2.1 m/s | — |
| 1982 ❄️ | 14.8°C | 13.0°C | 11.1°C | 18.1°C | 7.6°C | 176 mm | 88% | 2.7 m/s | — |
| 1981 | 17.8°C | 15.6°C | 13.4°C | 22.0°C | 9.9°C | 95 mm | 84% | 2.6 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 16.8°C with lows near 13°C (mean 14.9°C), based on 45 years of NASA POWER data.
June averages 104 mm of rainfall in Portland, about average for rainfall. The wettest on record was 234 mm in 1998.
The hottest June reached 25.9°C in 2025. The coldest dipped to 7°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 1.7°C. Daytime highs moved from 16.4°C to 17.9°C and overnight lows from 12.3°C to 14.3°C over the same span.
June is one of the warmer months of the year in Portland and about average for rainfall, so plan for around 16.8°C daytime highs and 13°C at night.
Not quite — June is the 9th coolest month in Portland, averaging 14.9°C.
For June in Portland, pack light layers you can adjust through the day, with typical highs of 16.8°C and lows of 13°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 87% — quite humid.
Average wind speed in June is 2.6 m/s. The windiest June on record averaged 2.9 m/s (1985).
The wettest June on record was 1998 with 234 mm. On average, June sees 104 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.
