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Hillsboro, OR Weather on May 26
May 26th in Hillsboro, OR typically brings pleasant spring weather, with average highs around 70°F and lows near 48°F. Over 55 years of records, the warmest May 26th was in 1986 (73°F average), while the coldest was 2011 (44°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 40% of May 26th dates historically, with the wettest May 26th recording 1.12" of rain. The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
What to Expect on May 26
Planning for May 26th in Hillsboro, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
May 26 Weather Records for Hillsboro
- •The all-time record high for May 26th in Hillsboro, OR is 86°F, set in 2023.
- •The coldest May 26th on record dropped to 35°F in 2011.
- •Last year (1971), May 26th was 6°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest May 26 ever in Hillsboro?
The warmest May 26 in Hillsboro, OR reached 86°F in 2023. That is 16°F above the long-term average high of 70°F.
What was the coldest May 26 ever in Hillsboro?
The coldest May 26 in Hillsboro, OR dropped to 35°F in 2011. That is 13°F below the long-term average low of 48°F.
What is the average temperature on May 26 in Hillsboro?
On May 26, Hillsboro averages a high of 70°F and a low of 48°F based on 55 years of NOAA weather observations from HILLSBORO.
How many years of weather data are available for May 26 in Hillsboro?
We have 55 years of weather records for May 26 in Hillsboro, 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 26 Weather History in Hillsboro
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 71°F | 49°F | 0" | -- |
| 2024 | 70°F | 45°F | 0" | -- |
| 2023 | 86°F | 52°F | 0" | -- |
| 2022 | 71°F | 53°F | 0.05" | -- |
| 2021 | 72°F | 46°F | 0" | -- |
| 2020 | 73°F | 51°F | 0" | -- |
| 2019 | 72°F | 48°F | 0" | -- |
| 2018 | 67°F | 42°F | 0" | -- |
| 2017 | 83°F | 47°F | 0" | -- |
| 2016 | 63°F | 50°F | 0" | -- |
| 2015 | 71°F | 52°F | 0" | -- |
| 2014 | 69°F | 50°F | 0" | -- |
| 2013 | 66°F | 52°F | 0.2" | -- |
| 2012 | 67°F | 48°F | 0" | -- |
| 2011 | 54°F | 35°F | 0.15" | -- |
| 2010 | 62°F | 46°F | 0.91" | -- |
| 2009 | 73°F | 43°F | 0" | -- |
| 2008 | 61°F | 53°F | 0.03" | -- |
| 2007 | 74°F | 51°F | 0" | -- |
| 2006 | 58°F | 46°F | 0.3" | -- |
| 2005 | 86°F | 55°F | 0" | -- |
| 2004 | 66°F | 57°F | 0.03" | -- |
| 2003 | 66°F | 51°F | 0" | -- |
| 2002 | 72°F | 55°F | 0.03" | -- |
| 2001 | 82°F | 38°F | 0" | -- |
| 2000 | 72°F | 57°F | 0.05" | -- |
| 1999 | 80°F | 50°F | 0" | -- |
| 1998 | 64°F | 47°F | 0.03" | -- |
| 1997 | 75°F | 55°F | 0.33" | -- |
| 1996 | 69°F | 44°F | 0" | -- |
| 1995 | 83°F | 51°F | 0" | -- |
| 1994 | 71°F | 45°F | 0" | -- |
| 1993 | 63°F | 55°F | 0.18" | -- |
| 1992 | 78°F | 55°F | 0" | -- |
| 1991 | 60°F | 46°F | 0.3" | -- |
| 1990 | 67°F | 40°F | 0.05" | -- |
| 1989 | 63°F | 46°F | 0.1" | -- |
| 1988 | 70°F | 45°F | 0" | -- |
| 1987 | 60°F | 44°F | 0" | -- |
| 1986 | 85°F | 61°F | 0" | -- |
| 1985 | 67°F | 51°F | 0" | -- |
| 1984 | 59°F | 43°F | 1.12" | -- |
| 1983 | 81°F | 50°F | 0" | -- |
| 1982 | 70°F | 43°F | 0" | -- |
| 1981 | 68°F | 46°F | 0.03" | -- |
| 1980 | 59°F | 46°F | 0.03" | -- |
| 1979 | 70°F | 42°F | 0" | -- |
| 1978 | 59°F | 49°F | 0.51" | -- |
| 1977 | 59°F | 39°F | 0.3" | -- |
| 1976 | 82°F | 47°F | 0" | -- |
| 1975 | 66°F | 52°F | 0.13" | -- |
| 1974 | 69°F | 49°F | 0" | -- |
| 1973 | 64°F | 36°F | 0" | -- |
| 1972 | 85°F | 44°F | 0" | -- |
| 1971 | 64°F | 55°F | 0.46" | -- |
Based on 55 years of data from NOAA station: HILLSBORO
Monthly Climate Averages
Historical temperature and precipitation averages for Hillsboro, OR, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.