Weather & Climate in Twin Rocks, PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Twin Rocks experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 24°F in January while summers reach 68°F in July. Annual precipitation totals 48.7 inches (wetter than the 38-inch national average). The area receives 79.7 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 42. 74% of days have good air quality. The city sits at an elevation of 1,780 feet.
Temperature
24°F Jan (-4°C)
68°F Jul (20°C)
| Annual Average | 46.6°F |
| 14% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 68°F (20°C) |
Geography
| Elevation | 1,780 ft (543 m) |
| Area | 0.6 sq mi (1.6 km²) |
| Population Density | 413/sq mi |
| Coordinates | 40.5026°N, 78.8568°W |
| Timezone | America/New_York |
| County | Cambria County County |
| Nearest Airport | Arnold Palmer Regional (LBE) 33 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
| Good Days % | 73.7% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 76.4 / 100 |
| Social Vulnerability | 60.4 / 100 |
| Community Resilience | 96.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.4.
| Jun 13, 2019 | 9 km N of Blain, Pennsylvania | M3.4 | 115 km | 27 km |
| Sep 11, 2024 | 4 km WNW of Claysville, Pennsylvania | M2.5 | 142 km | 4 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
212 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 7 fatalities, 347 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1998 | EF4 | 59 km | 36.5 mi | 0 |
| May 31, 1985 | EF4 | 77 km | 69.0 mi | 0 |
| Jun 3, 1980 | EF4 | 76 km | 11.8 mi | 0 |
| May 31, 1998 | EF3 | 86 km | 13.0 mi | 1 |
| Jul 11, 1976 | EF3 | 57 km | 11.8 mi | 1 |
| Aug 3, 1963 | EF3 | 89 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 69 km | 10.8 mi | 0 |
| Aug 25, 2023 | EF2 | 80 km | 2.0 mi | 0 |
| Mar 31, 2022 | EF2 | 57 km | 8.6 mi | 0 |
| Oct 2, 2018 | EF2 | 76 km | 4.1 mi | 0 |
| Oct 2, 2018 | EF2 | 61 km | 1.6 mi | 0 |
| Mar 23, 2011 | EF2 | 79 km | 9.0 mi | 0 |
| Apr 28, 2002 | EF2 | 32 km | 5.0 mi | 0 |
| Jun 2, 1998 | EF2 | 79 km | 15.0 mi | 0 |
| Aug 15, 1997 | EF2 | 44 km | 3.5 mi | 0 |
| Jul 19, 1996 | EF2 | 10 km | 6.0 mi | 0 |
| Jul 19, 1996 | EF2 | 48 km | 27.4 mi | 0 |
| Jul 19, 1996 | EF2 | 75 km | 10.0 mi | 0 |
| Sep 26, 1994 | EF2 | 30 km | 3.5 mi | 0 |
| Sep 18, 1991 | EF2 | 90 km | 4.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
2 wildfires (100+ acres) recorded within 100 km. Largest: BEAR DEN (945 acres, 2014).
| Year | Name | Acres Burned | Distance |
| 2014 | BEAR DEN | 945 | 75 km |
| 2005 | UNNAMED | 510 | 74 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 3.9 in | Coldest |
| February | 26°F (-3°C) | 3.2 in | Driest |
| March | 34°F (1°C) | 4.0 in | |
| April | 46°F (8°C) | 4.4 in | |
| May | 56°F (13°C) | 4.6 in | |
| June | 64°F (18°C) | 4.4 in | |
| July | 68°F (20°C) | 4.8 in | Warmest, Wettest |
| August | 66°F (19°C) | 4.0 in | |
| September | 60°F (15°C) | 4.2 in | |
| October | 49°F (9°C) | 3.6 in | |
| November | 38°F (3°C) | 3.6 in | |
| December | 29°F (-2°C) | 4.0 in |
Twin Rocks has a seasonal temperature swing of 43°F / from 24°F in January to 68°F in July. Total annual precipitation is 48.7 inches, with July being the wettest month (4.8") and February the driest (3.2").