Weather & Climate in East Marianna, PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
East Marianna 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. 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 44. 61% of days have good air quality. The city sits at an elevation of 944 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) |
Geography
| Elevation | 944 ft (288 m) |
| Area | 0.2 sq mi (0.5 km²) |
| Population Density | 968/sq mi |
| Coordinates | 40.0216°N, 80.0883°W |
| Timezone | America/New_York |
| County | Washington County County |
| Nearest Airport | Pittsburgh International (PIT) 33 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 61.2% |
| Unhealthy Days | 1 |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 83.1 / 100 |
| Social Vulnerability | 22.7 / 100 |
| Community Resilience | 87.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
17 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 | 103 km | 2 km |
| Apr 24, 2025 | 3 km S of Pleasant City, Ohio | M3.1 | 125 km | 6 km |
| Apr 22, 2025 | 3 km ESE of Buffalo, Ohio | M3.1 | 120 km | 5 km |
| Aug 31, 2011 | 3 km SE of Lowell, Ohio | M3.1 | 131 km | 5 km |
| Mar 30, 2024 | 2 km SSW of Maple Ridge, Ohio | M3.0 | 127 km | 6 km |
| Apr 2, 2017 | 5 km W of Graysville, Ohio | M3.0 | 106 km | 4 km |
| May 9, 2025 | 3 km S of Pleasant City, Ohio | M2.9 | 125 km | 5 km |
| Aug 7, 2000 | 2 km S of Limaville, Ohio | M2.9 | 138 km | 5 km |
| Aug 31, 2011 | 2 km NNW of Belmont, West Virginia | M2.8 | 123 km | 5 km |
| Feb 3, 2025 | 0 km NE of Reno, Ohio | M2.8 | 132 km | 10 km |
| Apr 29, 2025 | 1 km SE of Pleasant City, Ohio | M2.8 | 124 km | 2 km |
| Jul 30, 2013 | 12 km SSW of Glenville, West Virginia | M2.8 | 149 km | 13 km |
| Jul 20, 2013 | 6 km SW of Glenville, West Virginia | M2.7 | 143 km | 21 km |
| Sep 4, 2011 | 3 km N of Saint Marys, West Virginia | M2.6 | 117 km | 5 km |
| Sep 11, 2024 | 4 km WNW of Claysville, Pennsylvania | M2.5 | 34 km | 4 km |
| Aug 15, 2010 | 19 km ESE of Burnsville, West Virginia | M2.5 | 137 km | 17 km |
| Aug 21, 2010 | 19 km WNW of Helvetia, West Virginia | M2.5 | 139 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
234 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 16 fatalities, 541 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1998 | EF4 | 74 km | 36.5 mi | 0 |
| Jun 3, 1980 | EF4 | 76 km | 11.8 mi | 0 |
| May 31, 1998 | EF3 | 91 km | 13.0 mi | 1 |
| Oct 1, 1986 | EF3 | 100 km | 1.0 mi | 0 |
| May 31, 1985 | EF3 | 95 km | 39.0 mi | 9 |
| Jun 3, 1980 | EF3 | 57 km | 29.8 mi | 0 |
| Jul 11, 1976 | EF3 | 62 km | 11.8 mi | 1 |
| May 8, 1969 | EF3 | 99 km | 2.0 mi | 1 |
| May 19, 1967 | EF3 | 96 km | 0.3 mi | 1 |
| Aug 3, 1963 | EF3 | 38 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 55 km | 10.8 mi | 0 |
| May 11, 2024 | EF2 | 28 km | 5.8 mi | 0 |
| May 7, 2024 | EF2 | 87 km | 15.3 mi | 0 |
| Feb 28, 2024 | EF2 | 93 km | 4.1 mi | 0 |
| Aug 25, 2023 | EF2 | 54 km | 2.0 mi | 0 |
| Aug 1, 2022 | EF2 | 38 km | 1.8 mi | 0 |
| Oct 21, 2021 | EF2 | 42 km | 15.7 mi | 0 |
| Jul 29, 2021 | EF2 | 81 km | 2.7 mi | 0 |
| Oct 2, 2018 | EF2 | 60 km | 1.6 mi | 0 |
| Mar 23, 2011 | EF2 | 41 km | 9.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 3.4 in | Coldest |
| February | 31°F (-0°C) | 2.8 in | Driest |
| March | 39°F (4°C) | 3.7 in | |
| April | 50°F (10°C) | 3.4 in | |
| May | 60°F (16°C) | 4.3 in | Wettest |
| June | 68°F (20°C) | 4.2 in | |
| July | 72°F (22°C) | 4.3 in | Warmest |
| August | 71°F (21°C) | 3.9 in | |
| September | 64°F (18°C) | 3.5 in | |
| October | 52°F (11°C) | 3.3 in | |
| November | 42°F (5°C) | 2.9 in | |
| December | 34°F (1°C) | 3.3 in |
East Marianna has a seasonal temperature swing of 43°F / from 29°F in January to 72°F in July. Total annual precipitation is 43.1 inches, with May being the wettest month (4.3") and February the driest (2.8").