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Weather & Climate in Millheim, PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Millheim experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 24°F in January while summers reach 71°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 42.4 inches. The area receives 35.3 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 1,111 feet.
Temperature
24°F Jan (-5°C)
71°F Jul (22°C)
| Annual Average | 48.1°F |
| 11% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 1,111 ft (339 m) |
| Area | 0.5 sq mi (1.3 km²) |
| Population Density | 521/sq mi |
| Coordinates | 40.8936°N, 77.4765°W |
| Timezone | America/New_York |
| County | Centre County County |
| Nearest Airport | State College Regional (SCE) 17 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 68.0 / 100 |
| Social Vulnerability | 50.5 / 100 |
| Community Resilience | 74.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Avalanche | Very 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 | 137 km | 5 km |
| Jan 16, 1994 | 0 km E of Sinking Spring, Pennsylvania | M4.2 | 139 km | 5 km |
| Jun 13, 2019 | 9 km N of Blain, Pennsylvania | M3.4 | 53 km | 27 km |
| Jun 3, 2010 | 4 km ENE of Franklintown, Pennsylvania | M3.1 | 99 km | 2 km |
| Nov 14, 1997 | 0 km S of Rothsville, Pennsylvania | M3.0 | 133 km | 5 km |
| Apr 24, 2009 | 1 km S of Franklintown, Pennsylvania | M2.9 | 100 km | 1 km |
| Jan 16, 1994 | 0 km SSE of Sinking Spring, Pennsylvania | M2.9 | 139 km | 5 km |
| Sep 15, 2019 | 5 km ESE of East Berlin, Pennsylvania | M2.8 | 118 km | 5 km |
| Jun 10, 2025 | 10 km NW of Forksville, Pennsylvania | M2.8 | 100 km | 8 km |
| May 10, 1993 | 1 km NW of Whitfield, Pennsylvania | M2.8 | 137 km | 5 km |
| Oct 25, 2009 | 4 km ENE of Franklintown, Pennsylvania | M2.8 | 98 km | 1 km |
| Mar 11, 1995 | 0 km ENE of Landisville, Pennsylvania | M2.7 | 127 km | 5 km |
| Jan 18, 1994 | 3 km SE of Clay, Pennsylvania | M2.6 | 131 km | 5 km |
| Oct 28, 1996 | 2 km W of Reinholds, Pennsylvania | M2.6 | 133 km | 5 km |
| May 7, 1994 | 2 km SW of Sinking Spring, Pennsylvania | M2.5 | 138 km | 5 km |
| Jan 8, 1995 | 1 km WSW of Montrose Manor, Pennsylvania | M2.5 | 141 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
198 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 8 fatalities, 106 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 31, 1985 | EF3 | 42 km | 19.0 mi | 6 |
| Jul 29, 1976 | EF3 | 38 km | 25.0 mi | 0 |
| Apr 16, 1961 | EF3 | 94 km | 0.1 mi | 0 |
| Apr 19, 2019 | EF2 | 42 km | 4.9 mi | 0 |
| Apr 14, 2019 | EF2 | 96 km | 3.7 mi | 0 |
| Oct 2, 2018 | EF2 | 77 km | 2.2 mi | 0 |
| May 23, 2011 | EF2 | 36 km | 4.7 mi | 0 |
| Apr 28, 2011 | EF2 | 95 km | 1.1 mi | 0 |
| Apr 28, 2011 | EF2 | 99 km | 2.6 mi | 0 |
| Sep 26, 1994 | EF2 | 99 km | 3.5 mi | 0 |
| Oct 9, 1992 | EF2 | 97 km | 2.0 mi | 0 |
| Sep 18, 1991 | EF2 | 38 km | 4.0 mi | 0 |
| Nov 20, 1989 | EF2 | 42 km | 3.5 mi | 0 |
| Jun 20, 1989 | EF2 | 58 km | 2.0 mi | 0 |
| Jul 31, 1985 | EF2 | 94 km | 3.0 mi | 0 |
| Apr 17, 1982 | EF2 | 97 km | 4.0 mi | 0 |
| Apr 9, 1980 | EF2 | 23 km | 0.1 mi | 0 |
| Aug 28, 1978 | EF2 | 51 km | 3.3 mi | 0 |
| Apr 5, 1977 | EF2 | 90 km | 2.0 mi | 0 |
| Jun 5, 1975 | EF2 | 41 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 | 75 km |
| 2009 | WOODRUFF | 757 | 98 km |
| 2018 | FIELDS RUN | 711 | 48 km |
| 2006 | FIVE MILE FIRE | 658 | 60 km |
| 2006 | OKOME ROAD | 573 | 56 km |
| 2006 | BEAR TRAP | 561 | 50 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 2.6 in | Coldest, Driest |
| February | 27°F (-3°C) | 2.9 in | |
| March | 36°F (2°C) | 3.4 in | |
| April | 47°F (8°C) | 3.3 in | |
| May | 57°F (14°C) | 4.1 in | |
| June | 65°F (19°C) | 4.6 in | Wettest |
| July | 71°F (22°C) | 4.3 in | Warmest |
| August | 68°F (20°C) | 3.5 in | |
| September | 61°F (16°C) | 3.8 in | |
| October | 50°F (10°C) | 3.3 in | |
| November | 40°F (4°C) | 3.7 in | |
| December | 30°F (-1°C) | 3.0 in |
Millheim has a seasonal temperature swing of 48°F / from 24°F in January to 71°F in July. Total annual precipitation is 42.4 inches, with June being the wettest month (4.6") and January the driest (2.6").