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Portland, OR Weather on August 12
Portland hits 105°F on this date in historic 1977 heatwave
August 12 has seen extreme temperature swings in Portland's 55-year weather record. The city experienced a scorching 105°F back in 1977, far exceeding the typical August high of 82°F and marking one of the hottest days recorded on this date. In contrast, a more recent August 12 in 2020 brought a chilly 51°F low, demonstrating the wide range of conditions possible even in mid-summer Portland.
What to Expect on August 12
Planning for August 12th in Portland, OR? Stay hydrated and seek shade during peak afternoon hours.
Frequently Asked Questions
What was the warmest August 12 ever in Portland?
The warmest August 12 in Portland, OR reached 105°F in 1977. That is 23°F above the long-term average high of 82°F.
What was the coldest August 12 ever in Portland?
The coldest August 12 in Portland, OR dropped to 51°F in 2020. That is 8°F below the long-term average low of 59°F.
What is the average temperature on August 12 in Portland?
On August 12, Portland averages a high of 82°F and a low of 59°F based on 55 years of NOAA weather observations from PORTLAND KGW-TV.
How many years of weather data are available for August 12 in Portland?
We have 55 years of weather records for August 12 in Portland, OR, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
August 12 Weather History in Portland
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 97°F | 70°F | 0" | -- |
| 2024 | 72°F | 56°F | 0" | -- |
| 2023 | 87°F | 62°F | 0" | -- |
| 2022 | 79°F | 59°F | 0" | -- |
| 2021 | 101°F | 71°F | 0" | -- |
| 2020 | 72°F | 51°F | 0" | -- |
| 2019 | 81°F | 58°F | 0" | -- |
| 2018 | 74°F | 60°F | 0" | -- |
| 2017 | 77°F | 58°F | 0" | -- |
| 2016 | 96°F | 65°F | 0" | -- |
| 2015 | 89°F | 66°F | 0" | -- |
| 2014 | 80°F | 67°F | 0" | -- |
| 2013 | 78°F | 58°F | 0" | -- |
| 2012 | 91°F | 57°F | 0" | -- |
| 2011 | 80°F | 56°F | 0" | -- |
| 2010 | 85°F | 55°F | 0" | -- |
| 2009 | 79°F | 63°F | 0.61" | -- |
| 2008 | 82°F | 62°F | 0" | -- |
| 2007 | 67°F | 55°F | 0" | -- |
| 2006 | 80°F | 52°F | 0" | -- |
| 2005 | 82°F | 57°F | 0" | -- |
| 2004 | 88°F | 63°F | 0" | -- |
| 2003 | 78°F | 56°F | 0" | -- |
| 2002 | 93°F | 63°F | 0" | -- |
| 2001 | 92°F | 61°F | 0" | -- |
| 2000 | 77°F | 55°F | 0" | -- |
| 1999 | 74°F | 57°F | 0" | -- |
| 1998 | 89°F | 64°F | 0" | -- |
| 1997 | 92°F | 63°F | 0" | -- |
| 1996 | 83°F | 56°F | 0" | -- |
| 1995 | 71°F | 54°F | 0" | -- |
| 1994 | 82°F | 58°F | 0" | -- |
| 1993 | 70°F | 57°F | 0" | -- |
| 1992 | 90°F | 73°F | 0" | -- |
| 1991 | 84°F | 58°F | 0" | -- |
| 1990 | 90°F | 66°F | 0" | -- |
| 1989 | 76°F | 56°F | 0" | -- |
| 1988 | 73°F | 57°F | 0" | -- |
| 1987 | 74°F | 56°F | 0" | -- |
| 1986 | 78°F | 58°F | 0" | -- |
| 1985 | 80°F | 55°F | 0" | -- |
| 1984 | 72°F | 58°F | 0" | -- |
| 1983 | 83°F | 55°F | 0" | -- |
| 1982 | 74°F | 54°F | 0.31" | -- |
| 1981 | 89°F | 60°F | 0" | -- |
| 1980 | 77°F | 60°F | 0" | -- |
| 1979 | 85°F | 58°F | 0" | -- |
| 1978 | 72°F | 58°F | 0.3" | -- |
| 1977 | 105°F | 72°F | 0" | -- |
| 1976 | 79°F | 56°F | 0" | -- |
| 1975 | 85°F | 55°F | 0" | -- |
| 1974 | 69°F | 52°F | 0" | -- |
| 1973 | 91°F | 60°F | 0.21" | -- |
| 1972 | 73°F | 55°F | 0" | -- |
| 1971 | 90°F | 62°F | 0" | -- |
Based on 55 years of data from NOAA station: PORTLAND KGW-TV
How Has August 12 Changed?
Temperatures on this date have remained relatively stable over the past several decades.
Monthly Climate Averages
Historical temperature and precipitation averages for Portland, OR, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.