Wilfredor / CC0
Portland, OR Weather on May 27
Portland hits 97°F on May 27, 2005 - a remarkable 27 degrees above normal
May 27th in Portland typically brings mild spring conditions with average highs near 70°F, but the record books tell a dramatically different story. In 2005, the city soared to an exceptional 97°F, a stunning 27-degree spike above the seasonal norm that stands as the hottest May 27th in 55 years of records. Meanwhile, the temperature range across recorded history spans from that extreme heat down to a chilly 44°F low in 1977, illustrating the considerable weather variability Portland can experience even in late May.
What to Expect on May 27
Planning for May 27th in Portland, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Frequently Asked Questions
What was the warmest May 27 ever in Portland?
The warmest May 27 in Portland, OR reached 97°F in 2005. That is 27°F above the long-term average high of 70°F.
What was the coldest May 27 ever in Portland?
The coldest May 27 in Portland, OR dropped to 44°F in 1994. That is 7°F below the long-term average low of 51°F.
What is the average temperature on May 27 in Portland?
On May 27, Portland averages a high of 70°F and a low of 51°F based on 55 years of NOAA weather observations from PORTLAND KGW-TV.
How many years of weather data are available for May 27 in Portland?
We have 55 years of weather records for May 27 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.
May 27 Weather History in Portland
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 80°F | 50°F | 0" | -- |
| 2024 | 73°F | 49°F | 0" | -- |
| 2023 | 73°F | 56°F | 0" | -- |
| 2022 | 61°F | 52°F | 0.56" | -- |
| 2021 | 63°F | 50°F | 0.43" | -- |
| 2020 | 82°F | 53°F | 0" | -- |
| 2019 | 72°F | 48°F | 0" | -- |
| 2018 | 77°F | 51°F | 0" | -- |
| 2017 | 89°F | 57°F | 0" | -- |
| 2016 | 62°F | 49°F | 0.18" | -- |
| 2015 | 77°F | 53°F | 0" | -- |
| 2014 | 66°F | 51°F | 0" | -- |
| 2013 | 65°F | 51°F | 1.65" | -- |
| 2012 | 65°F | 49°F | 0" | -- |
| 2011 | 56°F | 45°F | 1.52" | -- |
| 2010 | 68°F | 45°F | 0.1" | -- |
| 2009 | 77°F | 50°F | 0" | -- |
| 2008 | 70°F | 54°F | 0" | -- |
| 2007 | 61°F | 51°F | 0" | -- |
| 2006 | 55°F | 48°F | 0.53" | -- |
| 2005 | 97°F | 61°F | 0" | -- |
| 2004 | 61°F | 53°F | 1.27" | -- |
| 2003 | 88°F | 52°F | 0" | -- |
| 2002 | 71°F | 57°F | 0.58" | -- |
| 2001 | 69°F | 52°F | 0" | -- |
| 2000 | 67°F | 55°F | 0.13" | -- |
| 1999 | 70°F | -- | 0" | -- |
| 1998 | 62°F | 47°F | 0" | -- |
| 1997 | 74°F | 58°F | 0.08" | -- |
| 1996 | 63°F | 46°F | 0" | -- |
| 1995 | 75°F | 53°F | 0" | -- |
| 1994 | 63°F | 44°F | 0" | -- |
| 1993 | 71°F | 57°F | 1.09" | -- |
| 1992 | 71°F | 50°F | 0" | -- |
| 1991 | 62°F | 46°F | 0" | -- |
| 1990 | 73°F | 57°F | 1.5" | -- |
| 1989 | 56°F | 47°F | 1.12" | -- |
| 1988 | 67°F | 49°F | 0.18" | -- |
| 1987 | 59°F | 51°F | 0" | -- |
| 1986 | 77°F | 55°F | 0" | -- |
| 1985 | 63°F | 51°F | 0" | -- |
| 1984 | 77°F | 45°F | 0" | -- |
| 1983 | 90°F | 57°F | 0" | -- |
| 1982 | 64°F | 48°F | 0" | -- |
| 1981 | 75°F | 48°F | 0" | -- |
| 1980 | 63°F | 48°F | 0.23" | -- |
| 1979 | 62°F | 48°F | 0.13" | -- |
| 1978 | 64°F | 52°F | 0.48" | -- |
| 1977 | 58°F | 44°F | 0.51" | -- |
| 1976 | 72°F | 49°F | 0.33" | -- |
| 1975 | 74°F | 49°F | 0" | -- |
| 1974 | 68°F | 47°F | 0" | -- |
| 1973 | 61°F | 47°F | 0" | -- |
| 1972 | 90°F | 61°F | 0" | -- |
| 1971 | 72°F | 50°F | 0" | -- |
Based on 55 years of data from NOAA station: PORTLAND KGW-TV
How Has May 27 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.