Hillsboro, OR
Oregon · Records since 1929–2026
☀️ 83°F
Currently in Hillsboro
As of 5:00 PM PDT
Records for July 28
🔥 Record High
105°F
July 28, 2009
+21° from 84° normal❄ Record Low
42°F
July 28, 1933
-11° from 53° normal
🌞 Normal high: 84°F 🌑 Normal low: 53°F 1991–2020 normals
All-Time Records — Hillsboro
114°F
Hottest Day Ever
Jun 28, 2021
-14°F
Coldest Day Ever
Jan 21, 1930
3.40"
Wettest Day Ever
Nov 18, 1996
13.5"
Most Snow in One Day
Jan 15, 1930
Top 10 Record Highs — July 28
| # | Temp | Date |
|---|---|---|
| 🏆 | 105°F | July 28, 2009 |
| 2 | 103°F | July 28, 1998 |
| 3 | 101°F | July 28, 1958 |
| 4 | 100°F | July 28, 1960 |
| 5 | 98°F | July 28, 1981 |
| 6 | 97°F | July 28, 2003 |
| 7 | 97°F | July 28, 1973 |
| 8 | 96°F | July 28, 2022 |
| 9 | 95°F | July 28, 2016 |
| 10 | 95°F | July 28, 1974 |
Top 5 Record Lows — July 28
| # | Temp | Date |
|---|---|---|
| 🥶 | 42°F | July 28, 1933 |
| 2 | 45°F | July 28, 2013 |
| 3 | 45°F | July 28, 1986 |
| 4 | 45°F | July 28, 1979 |
| 5 | 45°F | July 28, 1959 |
Heat Wave Summary — Hillsboro
threshold: 92°F (90th percentile of historical Jun–Aug highs)4.0
Avg heat wave length
days (historical)
99°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
0
Heat waves 2026
so far
2026 Daily High Temperature vs Normal
Year to date
Above normal
Below normal
94 of 177 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1930–20263
2026 so far
16
Avg/year 1970–2025
24
Avg/year (last 10 complete)
37
Most in a year (1952)
Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Hillsboro
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 12, 1967 – Aug 20, 1967 | 9 | 98°F (Aug 15) | 96°F | 53°F |
| 2 | Jul 26, 2009 – Aug 2, 2009 | 8 | 106°F (Jul 29) | 99°F | 62°F |
| 3 | Jul 21, 1939 – Jul 28, 1939 | 8 | 103°F (Jul 26) | 97°F | 56°F |
| 4 | Jul 24, 2022 – Jul 31, 2022 | 8 | 102°F (Jul 30) | 98°F | 60°F |
| 5 | Jul 4, 2024 – Jul 10, 2024 | 7 | 103°F (Jul 9) | 98°F | 56°F |
| 6 | Aug 16, 1950 – Aug 22, 1950 | 7 | 98°F (Aug 17) | 97°F | 55°F |
| 7 | Sep 17, 1952 – Sep 23, 1952 | 7 | 97°F (Sep 22) | 95°F | 52°F |
| 8 | Jun 30, 2015 – Jul 6, 2015 | 7 | 97°F (Jul 1) | 95°F | 57°F |
| 9 | Jul 13, 1941 – Jul 18, 1941 | 6 | 104°F (Jul 15) | 100°F | 62°F |
| 10 | Aug 3, 1972 – Aug 8, 1972 | 6 | 104°F (Aug 6) | 98°F | 56°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
19
2026 so far
above-normal nights
46.3
Avg / summer
1970–2020
79
Most in a summer
1958
Above-Normal Summer Nights Per Year
Average June–August Low by Decade
Overnight lows · complete decades only
Precipitation
Actual vs. 1991–2020 full-month and full-season normals
15.92"
2026 YTD
Normal: 19.17"
-3.25"
0.24"
July so far
July normal: 0.37"
-0.13"
0.24"
Summer so far
Summer normal: 2.16"
-1.92"
2
2026 heavy rain days
Days with ≥ 1.0"
Monthly Precipitation — Last 24 Months
Blue = actual · dashed line = monthly normal
Annual Precipitation Per Year (1970–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Heavy Rain Days Per Year (≥ 1.0")
Compare year-to-year changes in days with heavy rainfall (≥ 1.0")