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Weather & Climate in Castanea, PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Castanea experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 27°F in January while summers reach 73°F in July. The area gets 275 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 41.7 inches. The area receives 29.6 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 1,082 feet.
Temperature
27°F Jan (-3°C)
73°F Jul (23°C)
| Annual Average | 50.3°F |
| 7% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 1,082 ft (330 m) |
| Area | 1.4 sq mi (3.6 km²) |
| Population Density | 819/sq mi |
| Coordinates | 41.1171°N, 77.4270°W |
| Timezone | America/New_York |
| County | Clinton County County |
| Nearest Airport | State College Regional (SCE) 25 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 51.8 / 100 |
| Social Vulnerability | 67.6 / 100 |
| Community Resilience | 61.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| 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
16 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Jan 16, 1994 | 2 km W of Sinking Spring, Pennsylvania | M4.6 | 146 km | 5 km |
| Jan 16, 1994 | 0 km E of Sinking Spring, Pennsylvania | M4.2 | 149 km | 5 km |
| Jun 13, 2019 | 9 km N of Blain, Pennsylvania | M3.4 | 78 km | 27 km |
| Feb 3, 2001 | 6 km W of Bath, New York | M3.2 | 137 km | 0 km |
| Jun 3, 2010 | 4 km ENE of Franklintown, Pennsylvania | M3.1 | 121 km | 2 km |
| Nov 14, 1997 | 0 km S of Rothsville, Pennsylvania | M3.0 | 147 km | 5 km |
| Apr 24, 2009 | 1 km S of Franklintown, Pennsylvania | M2.9 | 122 km | 1 km |
| Jan 16, 1994 | 0 km SSE of Sinking Spring, Pennsylvania | M2.9 | 149 km | 5 km |
| Sep 15, 2019 | 5 km ESE of East Berlin, Pennsylvania | M2.8 | 140 km | 5 km |
| Jun 10, 2025 | 10 km NW of Forksville, Pennsylvania | M2.8 | 80 km | 8 km |
| May 10, 1993 | 1 km NW of Whitfield, Pennsylvania | M2.8 | 146 km | 5 km |
| Oct 25, 2009 | 4 km ENE of Franklintown, Pennsylvania | M2.8 | 120 km | 1 km |
| Mar 11, 1995 | 0 km ENE of Landisville, Pennsylvania | M2.7 | 143 km | 5 km |
| Jan 18, 1994 | 3 km SE of Clay, Pennsylvania | M2.6 | 144 km | 5 km |
| Oct 28, 1996 | 2 km W of Reinholds, Pennsylvania | M2.6 | 144 km | 5 km |
| May 7, 1994 | 2 km SW of Sinking Spring, Pennsylvania | M2.5 | 147 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
176 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 8 fatalities, 86 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 21, 2003 | EF3 | 99 km | 2.5 mi | 0 |
| May 31, 1985 | EF3 | 24 km | 19.0 mi | 6 |
| Jul 29, 1976 | EF3 | 16 km | 25.0 mi | 0 |
| Apr 19, 2019 | EF2 | 67 km | 4.9 mi | 0 |
| Apr 14, 2019 | EF2 | 86 km | 3.7 mi | 0 |
| Oct 2, 2018 | EF2 | 52 km | 2.2 mi | 0 |
| Jun 13, 2018 | EF2 | 91 km | 5.2 mi | 0 |
| Jul 8, 2014 | EF2 | 93 km | 6.7 mi | 0 |
| May 23, 2011 | EF2 | 55 km | 4.7 mi | 0 |
| Sep 18, 1991 | EF2 | 60 km | 4.0 mi | 0 |
| Nov 20, 1989 | EF2 | 64 km | 3.5 mi | 0 |
| Jun 20, 1989 | EF2 | 83 km | 2.0 mi | 0 |
| May 2, 1983 | EF2 | 90 km | 9.8 mi | 0 |
| Apr 17, 1982 | EF2 | 87 km | 4.0 mi | 0 |
| Apr 9, 1980 | EF2 | 44 km | 0.1 mi | 0 |
| Aug 28, 1978 | EF2 | 54 km | 3.3 mi | 0 |
| Jun 5, 1975 | EF2 | 58 km | 0.1 mi | 0 |
| Apr 14, 1974 | EF2 | 81 km | 12.8 mi | 0 |
| Sep 21, 1967 | EF2 | 80 km | 0.1 mi | 0 |
| Aug 16, 1966 | EF2 | 41 km | 4.5 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 | 50 km |
| 2009 | WOODRUFF | 757 | 73 km |
| 2018 | FIELDS RUN | 711 | 42 km |
| 2006 | FIVE MILE FIRE | 658 | 45 km |
| 2006 | OKOME ROAD | 573 | 31 km |
| 2006 | BEAR TRAP | 561 | 37 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 2.5 in | Coldest, Driest |
| February | 27°F (-3°C) | 2.7 in | |
| March | 36°F (2°C) | 3.2 in | |
| April | 47°F (8°C) | 3.2 in | |
| May | 58°F (14°C) | 3.9 in | |
| June | 66°F (19°C) | 4.5 in | Wettest |
| July | 73°F (23°C) | 4.3 in | Warmest |
| August | 69°F (21°C) | 3.5 in | |
| September | 62°F (17°C) | 3.7 in | |
| October | 51°F (10°C) | 3.2 in | |
| November | 40°F (5°C) | 3.6 in | |
| December | 30°F (-1°C) | 2.9 in |
Castanea has a seasonal temperature swing of 46°F / from 27°F in January to 73°F in July. Total annual precipitation is 41.1 inches, with June being the wettest month (4.5") and January the driest (2.5").