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Weather & Climate in Harrisburg, OR
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Harrisburg experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 41°F in January while summers reach 68°F in July. The area gets 251 sunny days per year, above the national average. Annual precipitation totals 40.8 inches. Air quality is rated Good with a median AQI of 32. The city sits at an elevation of 315 feet.
Temperature
41°F Jan (5°C)
68°F Jul (20°C)
| Annual Average | 53.1°F |
| 2% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 251 days/yr |
Geography
| Elevation | 315 ft (96 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 2,552/sq mi |
| Coordinates | 44.2703°N, 123.1626°W |
| Timezone | America/Los_Angeles |
| County | Benton County County |
| Nearest Airport | Mahlon Sweet Field (EUG) 10 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 32.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 84.4 / 100 |
| Social Vulnerability | 18.5 / 100 |
| Community Resilience | 97.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Coastal Flood | No Rating |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
104 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.
| Mar 25, 1993 | 4 km E of Scotts Mills, Oregon | M5.6 | 96 km | 20 km |
| Jul 12, 2004 | 30 km W of Yachats, Oregon | M4.9 | 106 km | 29 km |
| Aug 19, 2004 | 19 km W of Newport, Oregon | M4.7 | 100 km | 27 km |
| Jul 4, 2015 | 16 km ENE of Springfield, Oregon | M4.1 | 33 km | 8 km |
| Apr 15, 2017 | 43 km WNW of Yachats, Oregon | M3.9 | 117 km | 38 km |
| Feb 8, 1995 | 9 km ESE of Hubbard, Oregon | M3.8 | 103 km | 24 km |
| Mar 20, 2012 | 29 km WNW of Yachats, Oregon | M3.7 | 104 km | 33 km |
| Jun 8, 1993 | 5 km ESE of Scotts Mills, Oregon | M3.7 | 96 km | 19 km |
| Feb 24, 1999 | 8 km WSW of Molalla, Oregon | M3.6 | 102 km | 34 km |
| Jul 3, 1992 | 57 km W of Waldport, Oregon | M3.6 | 132 km | 21 km |
| May 19, 2019 | 3 km ESE of Rose Lodge, Oregon | M3.6 | 97 km | 44 km |
| Sep 8, 2012 | 8 km N of Scotts Mills, Oregon | M3.5 | 102 km | 24 km |
| Aug 2, 1996 | 4 km S of Scotts Mills, Oregon | M3.5 | 90 km | 29 km |
| Nov 25, 1999 | 5 km NNE of Mount Angel, Oregon | M3.4 | 99 km | 28 km |
| Apr 7, 2014 | 6 km NW of Sherwood, Oregon | M3.3 | 127 km | 19 km |
| Jul 13, 2004 | 32 km W of Yachats, Oregon | M3.3 | 108 km | 29 km |
| Mar 4, 2006 | 16 km ENE of Siletz, Oregon | M3.3 | 69 km | 43 km |
| Jul 12, 2007 | 1 km N of Barlow, Oregon | M3.2 | 116 km | 23 km |
| Mar 25, 1993 | 5 km ESE of Scotts Mills, Oregon | M3.2 | 96 km | 13 km |
| Mar 20, 2012 | 27 km WNW of Yachats, Oregon | M3.2 | 102 km | 29 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
28 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 3 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Dec 14, 2010 | EF2 | 67 km | 5.0 mi | 0 |
| Sep 1, 2017 | EF1 | 51 km | 0.7 mi | 0 |
| Jun 21, 2003 | EF1 | 65 km | 0.3 mi | 0 |
| Nov 24, 1989 | EF1 | 31 km | 0.3 mi | 0 |
| Mar 8, 1960 | EF1 | 60 km | 1.0 mi | 0 |
| Dec 6, 1951 | EF1 | 11 km | 0.3 mi | 0 |
| Oct 31, 2024 | EF0 | 80 km | 0.2 mi | 0 |
| Jun 18, 2023 | EF0 | 8 km | 0.3 mi | 0 |
| Oct 29, 2018 | EF0 | 54 km | 0.1 mi | 0 |
| Apr 14, 2015 | EF0 | 31 km | 0.1 mi | 0 |
| Jun 4, 2009 | EF0 | 25 km | 1.5 mi | 0 |
| Sep 28, 2007 | EF0 | 39 km | 1.0 mi | 0 |
| Dec 16, 2006 | EF0 | 87 km | 1.5 mi | 0 |
| Dec 2, 1999 | EF0 | 41 km | 2.3 mi | 0 |
| Oct 3, 1998 | EF0 | 86 km | 0.1 mi | 0 |
| Sep 17, 1997 | EF0 | 71 km | 0.5 mi | 0 |
| Sep 17, 1997 | EF0 | 64 km | 1.0 mi | 0 |
| Sep 15, 1997 | EF0 | 81 km | 0.5 mi | 0 |
| Sep 15, 1997 | EF0 | 84 km | 0.2 mi | 0 |
| Jun 1, 1997 | EF0 | 44 km | 1.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
11 volcanoes within 200 km. Closest: Sand Mountain Field (99 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Sand Mountain Field | Pyroclastic cone(s) | 1,664 m (5,459 ft) | -950 | 99 km |
| Belknap | Shield(s) | 2,095 m (6,873 ft) | 480 | 105 km |
| Three Sisters | Complex | 3,159 m (10,364 ft) | 440 | 112 km |
| Jefferson | Stratovolcano | 3,199 m (10,495 ft) | 950 | 117 km |
| Bachelor | Stratovolcano | 2,763 m (9,065 ft) | -5800 | 122 km |
| Davis Lake | Volcanic field | 2,163 m (7,096 ft) | -2790 | 133 km |
| Cinnamon Butte | Pyroclastic cone(s) | 1,956 m (6,417 ft) | Unknown | 142 km |
| Newberry | Shield | 2,434 m (7,986 ft) | 690 | 166 km |
| Hood | Stratovolcano | 3,426 m (11,240 ft) | 1866 | 169 km |
| Crater Lake | Caldera | 2,487 m (8,159 ft) | -2850 | 171 km |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 198 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: BEACHIE CREEK (194,619 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | BEACHIE CREEK | 194,619 | 90 km |
| 2020 | HOLIDAY FARM | 174,390 | 55 km |
| 2022 | CEDAR CREEK MF | 136,357 | 99 km |
| 2023 | BEDROCK | 31,692 | 61 km |
| 2021 | GALES | 31,655 | 69 km |
| 2021 | CHAOS | 29,698 | 93 km |
| 2023 | LOOKOUT | 25,103 | 82 km |
| 2018 | TERWILLIGER | 11,400 | 79 km |
| 2017 | JONES | 10,260 | 60 km |
| 2017 | REBEL | 9,047 | 86 km |
| 1991 | WARNER CREEK | 6,836 | 100 km |
| 2014 | DECEPTION CREEK | 6,021 | 76 km |
| 1988 | 88771081 | 5,174 | 92 km |
| 1987 | ROCKHOUSE | 5,011 | 76 km |
| 2003 | CLARK | 4,905 | 58 km |
| 2017 | AVENUE | 4,323 | 86 km |
| 2017 | MR RONEY | 3,646 | 94 km |
| 2010 | SCOTT MOUNTAIN | 3,361 | 99 km |
| 1988 | SHADY BEACH | 2,688 | 94 km |
| 2017 | MR 183 OLALLIE LOOKOUT | 1,843 | 92 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 7.4 in | |
| February | 44°F (7°C) | 5.8 in | |
| March | 47°F (8°C) | 5.4 in | |
| April | 50°F (10°C) | 3.4 in | |
| May | 55°F (13°C) | 2.4 in | |
| June | 61°F (16°C) | 1.6 in | |
| July | 68°F (20°C) | 0.6 in | Warmest, Driest |
| August | 68°F (20°C) | 1.0 in | |
| September | 63°F (17°C) | 1.8 in | |
| October | 54°F (12°C) | 3.5 in | |
| November | 46°F (8°C) | 8.0 in | |
| December | 41°F (5°C) | 8.3 in | Coldest, Wettest |
Harrisburg has a seasonal temperature swing of 27°F / from 41°F in December to 68°F in July. Total annual precipitation is 49.1 inches, with December being the wettest month (8.3") and July the driest (0.6").