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Weather & Climate in Petersburg, PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Petersburg 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. 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 42.0 inches. The area receives 50.0 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 663 feet.
Temperature
24°F Jan (-5°C)
68°F Jul (20°C)
| Annual Average | 46.6°F |
| 14% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 663 ft (202 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 1,039/sq mi |
| Coordinates | 40.5726°N, 78.0506°W |
| Timezone | America/New_York |
| County | Blair County County |
| Nearest Airport | State College Regional (SCE) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 77.7 / 100 |
| Social Vulnerability | 57.6 / 100 |
| Community Resilience | 94.1 / 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 | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
7 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 | 49 km | 27 km |
| Jun 3, 2010 | 4 km ENE of Franklintown, Pennsylvania | M3.1 | 106 km | 2 km |
| Jan 17, 2016 | 3 km NE of Ranson, West Virginia | M3.0 | 141 km | 5 km |
| Apr 24, 2009 | 1 km S of Franklintown, Pennsylvania | M2.9 | 104 km | 1 km |
| Sep 15, 2019 | 5 km ESE of East Berlin, Pennsylvania | M2.8 | 120 km | 5 km |
| Oct 25, 2009 | 4 km ENE of Franklintown, Pennsylvania | M2.8 | 105 km | 1 km |
| Mar 11, 1995 | 0 km ENE of Landisville, Pennsylvania | M2.7 | 149 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
178 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 1 fatality, 28 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 31, 1985 | EF4 | 85 km | 69.0 mi | 0 |
| Jul 29, 1976 | EF3 | 96 km | 25.0 mi | 0 |
| Apr 16, 1961 | EF3 | 74 km | 0.1 mi | 0 |
| Apr 19, 2019 | EF2 | 76 km | 2.9 mi | 0 |
| Apr 19, 2019 | EF2 | 37 km | 4.9 mi | 0 |
| May 23, 2011 | EF2 | 73 km | 4.7 mi | 0 |
| Apr 28, 2002 | EF2 | 100 km | 5.0 mi | 0 |
| Jul 19, 1996 | EF2 | 59 km | 6.0 mi | 0 |
| Jul 19, 1996 | EF2 | 86 km | 27.4 mi | 0 |
| Sep 26, 1994 | EF2 | 50 km | 3.5 mi | 0 |
| Apr 30, 1994 | EF2 | 92 km | 6.0 mi | 0 |
| Sep 18, 1991 | EF2 | 22 km | 4.0 mi | 0 |
| Nov 20, 1989 | EF2 | 20 km | 3.5 mi | 0 |
| Jun 20, 1989 | EF2 | 52 km | 2.0 mi | 0 |
| Jul 26, 1981 | EF2 | 100 km | 0.1 mi | 0 |
| Jun 9, 1980 | EF2 | 51 km | 7.4 mi | 0 |
| Apr 9, 1980 | EF2 | 64 km | 0.1 mi | 0 |
| Mar 21, 1976 | EF2 | 99 km | 1.0 mi | 0 |
| Jun 5, 1975 | EF2 | 23 km | 0.1 mi | 0 |
| Sep 21, 1967 | EF2 | 76 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
4 wildfires (100+ acres) recorded within 100 km. Largest: BEAR DEN (945 acres, 2014).
| Year | Name | Acres Burned | Distance |
| 2014 | BEAR DEN | 945 | 97 km |
| 2018 | FIELDS RUN | 711 | 67 km |
| 2006 | FIVE MILE FIRE | 658 | 86 km |
| 2006 | BEAR TRAP | 561 | 79 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 2.5 in | Coldest, Driest |
| February | 29°F (-2°C) | 2.5 in | |
| March | 37°F (3°C) | 3.3 in | |
| April | 48°F (9°C) | 3.2 in | |
| May | 59°F (15°C) | 3.7 in | |
| June | 67°F (19°C) | 4.0 in | Wettest |
| July | 68°F (20°C) | 3.7 in | |
| August | 70°F (21°C) | 3.2 in | Warmest |
| September | 63°F (17°C) | 3.4 in | |
| October | 52°F (11°C) | 2.9 in | |
| November | 42°F (5°C) | 3.3 in | |
| December | 32°F (-0°C) | 2.8 in |
Petersburg has a seasonal temperature swing of 46°F / from 24°F in January to 70°F in August. Total annual precipitation is 38.5 inches, with June being the wettest month (4.0") and January the driest (2.5").