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Weather & Climate in Vicksburg CDP (Union County), PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Vicksburg CDP (Union County) 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 43.9 inches. The area receives 28.8 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 531 feet.
Temperature
27°F Jan (-3°C)
73°F Jul (23°C)
| Annual Average | 50.4°F |
| 7% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 531 ft (162 m) |
| Area | 0.5 sq mi (1.2 km²) |
| Population Density | 379/sq mi |
| Coordinates | 40.9384°N, 76.9905°W |
| Timezone | America/New_York |
| County | Northumberland County County |
| Nearest Airport | Williamsport Regional (IPT) 21 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 79.2 / 100 |
| Social Vulnerability | 52.8 / 100 |
| Community Resilience | 89.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively 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
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 | 105 km | 5 km |
| Jan 16, 1994 | 0 km E of Sinking Spring, Pennsylvania | M4.2 | 107 km | 5 km |
| Jun 13, 2019 | 9 km N of Blain, Pennsylvania | M3.4 | 72 km | 27 km |
| Jun 3, 2010 | 4 km ENE of Franklintown, Pennsylvania | M3.1 | 95 km | 2 km |
| Nov 14, 1997 | 0 km S of Rothsville, Pennsylvania | M3.0 | 108 km | 5 km |
| Apr 24, 2009 | 1 km S of Franklintown, Pennsylvania | M2.9 | 97 km | 1 km |
| Jan 16, 1994 | 0 km SSE of Sinking Spring, Pennsylvania | M2.9 | 108 km | 5 km |
| Sep 15, 2019 | 5 km ESE of East Berlin, Pennsylvania | M2.8 | 113 km | 5 km |
| Jun 10, 2025 | 10 km NW of Forksville, Pennsylvania | M2.8 | 74 km | 8 km |
| May 10, 1993 | 1 km NW of Whitfield, Pennsylvania | M2.8 | 105 km | 5 km |
| Oct 25, 2009 | 4 km ENE of Franklintown, Pennsylvania | M2.8 | 94 km | 1 km |
| Mar 11, 1995 | 0 km ENE of Landisville, Pennsylvania | M2.7 | 106 km | 5 km |
| Jan 18, 1994 | 3 km SE of Clay, Pennsylvania | M2.6 | 105 km | 5 km |
| Oct 28, 1996 | 2 km W of Reinholds, Pennsylvania | M2.6 | 103 km | 5 km |
| May 7, 1994 | 2 km SW of Sinking Spring, Pennsylvania | M2.5 | 106 km | 5 km |
| Jan 8, 1995 | 1 km WSW of Montrose Manor, Pennsylvania | M2.5 | 110 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
244 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 9 fatalities, 134 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 14, 2004 | EF3 | 81 km | 7.5 mi | 0 |
| May 31, 1985 | EF3 | 30 km | 19.0 mi | 6 |
| Jul 29, 1976 | EF3 | 37 km | 25.0 mi | 0 |
| Jun 18, 1970 | EF3 | 84 km | 1.9 mi | 1 |
| Apr 19, 2019 | EF2 | 69 km | 4.9 mi | 0 |
| Apr 14, 2019 | EF2 | 56 km | 3.7 mi | 0 |
| Oct 2, 2018 | EF2 | 69 km | 2.2 mi | 0 |
| Jun 13, 2018 | EF2 | 90 km | 5.2 mi | 0 |
| Jul 8, 2014 | EF2 | 80 km | 6.7 mi | 0 |
| May 23, 2011 | EF2 | 36 km | 4.7 mi | 0 |
| Apr 28, 2011 | EF2 | 70 km | 1.1 mi | 0 |
| Apr 28, 2011 | EF2 | 93 km | 2.6 mi | 0 |
| Dec 1, 2006 | EF2 | 78 km | 20.0 mi | 0 |
| Oct 9, 1992 | EF2 | 91 km | 2.0 mi | 0 |
| Jul 17, 1992 | EF2 | 79 km | 1.0 mi | 0 |
| Jul 15, 1992 | EF2 | 84 km | 1.5 mi | 0 |
| Sep 18, 1991 | EF2 | 76 km | 4.0 mi | 0 |
| May 6, 1991 | EF2 | 99 km | 1.0 mi | 0 |
| Nov 20, 1989 | EF2 | 78 km | 3.5 mi | 0 |
| Jun 20, 1989 | EF2 | 76 km | 2.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
7 wildfires (100+ acres) recorded within 100 km. Largest: PENOBSCOT (2,091 acres, 2009).
| Year | Name | Acres Burned | Distance |
| 2009 | PENOBSCOT | 2,091 | 99 km |
| 2008 | BULL RUN | 2,003 | 79 km |
| 2004 | CRYSTAL LAKE | 1,838 | 100 km |
| 2018 | FIELDS RUN | 711 | 82 km |
| 2006 | FIVE MILE FIRE | 658 | 87 km |
| 2006 | OKOME ROAD | 573 | 61 km |
| 2006 | BEAR TRAP | 561 | 79 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 2.7 in | Coldest |
| February | 29°F (-2°C) | 2.6 in | Driest |
| March | 38°F (3°C) | 3.2 in | |
| April | 49°F (9°C) | 3.4 in | |
| May | 60°F (15°C) | 4.0 in | |
| June | 68°F (20°C) | 4.5 in | Wettest |
| July | 73°F (23°C) | 4.0 in | Warmest |
| August | 71°F (22°C) | 3.6 in | |
| September | 64°F (18°C) | 3.9 in | |
| October | 52°F (11°C) | 3.3 in | |
| November | 42°F (5°C) | 3.6 in | |
| December | 32°F (-0°C) | 3.0 in |
Vicksburg CDP (Union County) has a seasonal temperature swing of 46°F / from 27°F in January to 73°F in July. Total annual precipitation is 41.8 inches, with June being the wettest month (4.5") and February the driest (2.6").