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Hillsboro, OR Weather on May 17
May 17th in Hillsboro, OR typically brings mild spring weather, with average highs around 69°F and lows near 45°F. Over 55 years of records, the warmest May 17th was in 2008 (73°F average), while the coldest was 1974 (46°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 35% of May 17th dates historically, with the wettest May 17th recording 1.5" of rain. The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
What to Expect on May 17
Planning for May 17th in Hillsboro, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
May 17 Weather Records for Hillsboro
- •The all-time record high for May 17th in Hillsboro, OR is 92°F, set in 2008.
- •The coldest May 17th on record dropped to 35°F in 1974.
- •Temperatures have reached 90°F or higher on May 17th in 2 of the last 55 years.
- •Last year (1971), May 17th was 13°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest May 17 ever in Hillsboro?
The warmest May 17 in Hillsboro, OR reached 92°F in 2008. That is 23°F above the long-term average high of 69°F.
What was the coldest May 17 ever in Hillsboro?
The coldest May 17 in Hillsboro, OR dropped to 35°F in 1974. That is 10°F below the long-term average low of 45°F.
What is the average temperature on May 17 in Hillsboro?
On May 17, Hillsboro averages a high of 69°F and a low of 45°F based on 55 years of NOAA weather observations from HILLSBORO.
How many years of weather data are available for May 17 in Hillsboro?
We have 55 years of weather records for May 17 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 17 Weather History in Hillsboro
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 65°F | 48°F | 0.76" | -- |
| 2024 | 65°F | 43°F | 0" | -- |
| 2023 | 90°F | 55°F | 0" | -- |
| 2022 | 65°F | 43°F | 0" | -- |
| 2021 | 65°F | 44°F | 0" | -- |
| 2020 | 67°F | 47°F | 0" | -- |
| 2019 | 63°F | 52°F | 0" | -- |
| 2018 | 67°F | 50°F | 0" | -- |
| 2017 | 59°F | 45°F | 0" | -- |
| 2016 | 75°F | 47°F | 0" | -- |
| 2015 | 69°F | 50°F | 0" | -- |
| 2014 | 70°F | 50°F | 0" | -- |
| 2013 | 62°F | 40°F | 0.53" | -- |
| 2012 | 68°F | 37°F | 0" | -- |
| 2011 | 61°F | 37°F | 0.03" | -- |
| 2010 | 74°F | 53°F | 0.48" | -- |
| 2009 | 82°F | 45°F | 0" | -- |
| 2008 | 92°F | 55°F | 0" | -- |
| 2007 | 72°F | 39°F | 0" | -- |
| 2006 | 84°F | 49°F | 0" | -- |
| 2005 | 58°F | 47°F | 0.38" | -- |
| 2004 | 75°F | 44°F | 0" | -- |
| 2003 | 57°F | 39°F | 0.36" | -- |
| 2002 | 72°F | 41°F | 0.66" | -- |
| 2001 | 57°F | 40°F | 0" | -- |
| 2000 | 72°F | 51°F | 0" | -- |
| 1999 | 66°F | 52°F | 0.08" | -- |
| 1998 | 64°F | 50°F | 0.05" | -- |
| 1997 | 78°F | 51°F | 0" | -- |
| 1996 | 65°F | 52°F | 0.84" | -- |
| 1995 | 58°F | 48°F | 0" | -- |
| 1994 | 62°F | 47°F | 0.28" | -- |
| 1993 | 78°F | 49°F | 0" | -- |
| 1992 | 83°F | 42°F | 0" | -- |
| 1991 | 73°F | 47°F | 1.5" | -- |
| 1990 | 68°F | 41°F | 0" | -- |
| 1989 | 70°F | 49°F | 0" | -- |
| 1988 | 60°F | 43°F | 0.41" | -- |
| 1987 | 67°F | 43°F | 0" | -- |
| 1986 | 69°F | 43°F | 0" | -- |
| 1985 | 87°F | 46°F | 0" | -- |
| 1984 | 63°F | 47°F | 0.03" | -- |
| 1983 | 62°F | 43°F | 0" | -- |
| 1982 | 73°F | 48°F | 0.41" | -- |
| 1981 | 64°F | 45°F | 0.15" | -- |
| 1980 | 69°F | 36°F | 0" | -- |
| 1979 | 74°F | 42°F | 0" | -- |
| 1978 | 66°F | 44°F | 0" | -- |
| 1977 | 60°F | 47°F | 0.03" | -- |
| 1976 | 61°F | 42°F | 0" | -- |
| 1975 | 70°F | 40°F | 0" | -- |
| 1974 | 57°F | 35°F | 0" | -- |
| 1973 | 85°F | 48°F | 0" | -- |
| 1972 | 69°F | 46°F | 1.17" | -- |
| 1971 | 56°F | 41°F | 0.05" | -- |
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.