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Weather & Climate in Mount Morris, PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mount Morris experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 29°F in January while summers reach 72°F in July. The area gets 293 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 43.1 inches. The area receives 30.1 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 897 feet.
Temperature
29°F Jan (-2°C)
72°F Jul (22°C)
| Annual Average | 51.0°F |
| 6% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 897 ft (273 m) |
| Area | 2.7 sq mi (6.9 km²) |
| Population Density | 251/sq mi |
| Coordinates | 39.7333°N, 80.0820°W |
| Timezone | America/New_York |
| County | Monongalia County County |
| Nearest Airport | Arnold Palmer Regional (LBE) 52 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 71.5 / 100 |
| Social Vulnerability | 18.5 / 100 |
| Community Resilience | 83.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
25 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.4.
| Jun 3, 2017 | 1 km WNW of Batesville, Ohio | M3.4 | 105 km | 2 km |
| Mar 31, 2013 | West Virginia | M3.4 | 137 km | 8 km |
| Apr 4, 2010 | 14 km SW of Gassaway, West Virginia | M3.4 | 145 km | 0 km |
| Apr 24, 2025 | 3 km S of Pleasant City, Ohio | M3.1 | 126 km | 6 km |
| Apr 22, 2025 | 3 km ESE of Buffalo, Ohio | M3.1 | 121 km | 5 km |
| Aug 31, 2011 | 3 km SE of Lowell, Ohio | M3.1 | 121 km | 5 km |
| Apr 2, 2017 | 5 km W of Graysville, Ohio | M3.0 | 100 km | 4 km |
| May 9, 2025 | 3 km S of Pleasant City, Ohio | M2.9 | 126 km | 5 km |
| Apr 29, 2025 | 1 km SE of Pleasant City, Ohio | M2.8 | 125 km | 2 km |
| Feb 3, 2025 | 0 km NE of Reno, Ohio | M2.8 | 119 km | 10 km |
| Aug 31, 2011 | 2 km NNW of Belmont, West Virginia | M2.8 | 108 km | 5 km |
| Jan 10, 2012 | 14 km WNW of Birch River, West Virginia | M2.8 | 147 km | 0 km |
| Jul 30, 2013 | 12 km SSW of Glenville, West Virginia | M2.8 | 122 km | 13 km |
| Apr 29, 2010 | 7 km W of Gassaway, West Virginia | M2.7 | 136 km | 0 km |
| Jul 20, 2013 | 6 km SW of Glenville, West Virginia | M2.7 | 116 km | 21 km |
| Apr 29, 2010 | 3 km WNW of Gassaway, West Virginia | M2.6 | 133 km | 0 km |
| May 7, 2010 | 14 km WSW of Gassaway, West Virginia | M2.6 | 145 km | 0 km |
| Aug 16, 2013 | 13 km SW of Glenville, West Virginia | M2.6 | 124 km | 6 km |
| Sep 4, 2011 | 3 km N of Saint Marys, West Virginia | M2.6 | 102 km | 5 km |
| Aug 21, 2010 | 19 km WNW of Helvetia, West Virginia | M2.5 | 108 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
184 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 6 fatalities, 262 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1998 | EF4 | 82 km | 36.5 mi | 0 |
| May 31, 1998 | EF3 | 86 km | 13.0 mi | 1 |
| Oct 1, 1986 | EF3 | 77 km | 1.0 mi | 0 |
| Jun 3, 1980 | EF3 | 28 km | 29.8 mi | 0 |
| Jul 11, 1976 | EF3 | 85 km | 11.8 mi | 1 |
| May 19, 1967 | EF3 | 76 km | 0.3 mi | 1 |
| Aug 3, 1963 | EF3 | 68 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 82 km | 10.8 mi | 0 |
| May 11, 2024 | EF2 | 60 km | 5.8 mi | 0 |
| Feb 28, 2024 | EF2 | 91 km | 4.1 mi | 0 |
| Aug 25, 2023 | EF2 | 58 km | 2.0 mi | 0 |
| Aug 1, 2022 | EF2 | 51 km | 1.8 mi | 0 |
| Oct 21, 2021 | EF2 | 66 km | 15.7 mi | 0 |
| Jul 29, 2021 | EF2 | 94 km | 2.7 mi | 0 |
| Oct 2, 2018 | EF2 | 74 km | 1.6 mi | 0 |
| Mar 23, 2011 | EF2 | 67 km | 9.0 mi | 0 |
| Jun 2, 1998 | EF2 | 74 km | 15.0 mi | 0 |
| Jun 2, 1998 | EF2 | 97 km | 15.0 mi | 0 |
| Jun 2, 1998 | EF2 | 37 km | 12.0 mi | 0 |
| Aug 15, 1997 | EF2 | 93 km | 3.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 2.8 in | Coldest |
| February | 32°F (-0°C) | 2.5 in | Driest |
| March | 41°F (5°C) | 3.7 in | |
| April | 50°F (10°C) | 3.5 in | |
| May | 60°F (15°C) | 4.1 in | |
| June | 68°F (20°C) | 4.0 in | |
| July | 72°F (22°C) | 4.4 in | Warmest, Wettest |
| August | 70°F (21°C) | 3.9 in | |
| September | 64°F (18°C) | 3.3 in | |
| October | 53°F (11°C) | 2.7 in | |
| November | 43°F (6°C) | 3.2 in | |
| December | 34°F (1°C) | 3.1 in |
Mount Morris has a seasonal temperature swing of 43°F / from 29°F in January to 72°F in July. Total annual precipitation is 41.2 inches, with July being the wettest month (4.4") and February the driest (2.5").