Weather & Climate in Sinnamahoning, PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sinnamahoning experiences four distinct seasons with an average annual temperature of 47°F (9°C). Winters average 24°F in January while summers reach 69°F in July. Annual precipitation totals 43.5 inches. The area receives 37.7 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 907 feet.
Temperature
24°F Jan (-4°C)
69°F Jul (21°C)
| Annual Average | 47.3°F |
| 12% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 69°F (21°C) |
Geography
| Elevation | 907 ft (276 m) |
| Area | 0.6 sq mi (1.6 km²) |
| Population Density | 68/sq mi |
| Coordinates | 41.3223°N, 78.0957°W |
| Timezone | America/New_York |
| County | Cameron County County |
| Nearest Airport | State College Regional (SCE) 33 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 12.6 / 100 |
| Social Vulnerability | 77.9 / 100 |
| Community Resilience | 85.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Avalanche | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
3 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 | 112 km | 27 km |
| Feb 3, 2001 | 6 km W of Bath, New York | M3.2 | 128 km | 0 km |
| Jun 10, 2025 | 10 km NW of Forksville, Pennsylvania | M2.8 | 122 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
134 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 12 fatalities, 149 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 31, 1985 | EF4 | 51 km | 69.0 mi | 0 |
| May 31, 1985 | EF4 | 85 km | 29.0 mi | 4 |
| Jul 21, 2003 | EF3 | 68 km | 2.5 mi | 0 |
| May 31, 1985 | EF3 | 81 km | 19.0 mi | 6 |
| Jul 29, 1976 | EF3 | 70 km | 25.0 mi | 0 |
| Sep 3, 1963 | EF3 | 54 km | 8.4 mi | 0 |
| May 15, 1961 | EF3 | 96 km | 3.0 mi | 0 |
| Apr 19, 2019 | EF2 | 97 km | 4.9 mi | 0 |
| Oct 2, 2018 | EF2 | 92 km | 4.1 mi | 0 |
| Oct 2, 2018 | EF2 | 80 km | 2.2 mi | 0 |
| Jul 19, 1996 | EF2 | 84 km | 27.4 mi | 0 |
| Sep 26, 1994 | EF2 | 82 km | 3.5 mi | 0 |
| Sep 18, 1991 | EF2 | 76 km | 4.0 mi | 0 |
| Nov 20, 1989 | EF2 | 81 km | 3.5 mi | 0 |
| May 31, 1985 | EF2 | 76 km | 19.0 mi | 0 |
| May 2, 1983 | EF2 | 86 km | 9.8 mi | 0 |
| Jun 9, 1980 | EF2 | 88 km | 7.4 mi | 0 |
| Apr 9, 1980 | EF2 | 93 km | 0.1 mi | 0 |
| Jul 11, 1976 | EF2 | 92 km | 28.7 mi | 1 |
| Jun 5, 1975 | EF2 | 65 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
6 wildfires (100+ acres) recorded within 100 km. Largest: BULL RUN (2,003 acres, 2008).
| Year | Name | Acres Burned | Distance |
| 2008 | BULL RUN | 2,003 | 61 km |
| 2009 | WOODRUFF | 757 | 71 km |
| 2018 | FIELDS RUN | 711 | 23 km |
| 2006 | FIVE MILE FIRE | 658 | 18 km |
| 2006 | OKOME ROAD | 573 | 59 km |
| 2006 | BEAR TRAP | 561 | 23 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 3.0 in | Coldest |
| February | 26°F (-3°C) | 2.6 in | Driest |
| March | 34°F (1°C) | 3.6 in | |
| April | 46°F (8°C) | 4.0 in | |
| May | 56°F (14°C) | 3.7 in | |
| June | 65°F (18°C) | 3.7 in | |
| July | 69°F (21°C) | 4.3 in | Warmest, Wettest |
| August | 68°F (20°C) | 4.2 in | |
| September | 62°F (16°C) | 4.0 in | |
| October | 50°F (10°C) | 3.7 in | |
| November | 39°F (4°C) | 3.4 in | |
| December | 30°F (-1°C) | 3.3 in |
Sinnamahoning has a seasonal temperature swing of 45°F / from 24°F in January to 69°F in July. Total annual precipitation is 43.5 inches, with July being the wettest month (4.3") and February the driest (2.6").