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Weather & Climate in Jacksonville CDP (Indiana County), PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Jacksonville CDP (Indiana County) experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 27°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 47.9 inches (wetter than the 38-inch national average). The area receives 45.8 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 1,268 feet.
Temperature
27°F Jan (-3°C)
71°F Jul (22°C)
| Annual Average | 49.5°F |
| 8% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 1,268 ft (386 m) |
| Area | 6.8 sq mi (17.5 km²) |
| Population Density | 111/sq mi |
| Coordinates | 40.5609°N, 79.3018°W |
| Timezone | America/New_York |
| County | Indiana County County |
| Nearest Airport | Arnold Palmer Regional (LBE) 21 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 63.7 / 100 |
| Social Vulnerability | 70.5 / 100 |
| Community Resilience | 68.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively High |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Sep 25, 1998 | 2 km SW of Adamsville, Pennsylvania | M4.5 | 138 km | 5 km |
| Sep 11, 2024 | 4 km WNW of Claysville, Pennsylvania | M2.5 | 109 km | 4 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
258 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 7 fatalities, 410 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1998 | EF4 | 57 km | 36.5 mi | 0 |
| May 31, 1985 | EF4 | 87 km | 69.0 mi | 0 |
| Jun 3, 1980 | EF4 | 38 km | 11.8 mi | 0 |
| May 31, 1998 | EF3 | 92 km | 13.0 mi | 1 |
| Jul 11, 1976 | EF3 | 29 km | 11.8 mi | 1 |
| Aug 3, 1963 | EF3 | 56 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 36 km | 10.8 mi | 0 |
| May 11, 2024 | EF2 | 72 km | 5.8 mi | 0 |
| Aug 25, 2023 | EF2 | 69 km | 2.0 mi | 0 |
| Mar 31, 2022 | EF2 | 31 km | 8.6 mi | 0 |
| Oct 2, 2018 | EF2 | 47 km | 1.6 mi | 0 |
| Oct 2, 2018 | EF2 | 66 km | 4.1 mi | 0 |
| Mar 23, 2011 | EF2 | 49 km | 9.0 mi | 0 |
| Apr 28, 2002 | EF2 | 6 km | 5.0 mi | 0 |
| Jun 2, 1998 | EF2 | 95 km | 12.0 mi | 0 |
| Jun 2, 1998 | EF2 | 79 km | 15.0 mi | 0 |
| Aug 15, 1997 | EF2 | 26 km | 3.5 mi | 0 |
| Jul 19, 1996 | EF2 | 58 km | 10.0 mi | 0 |
| Jul 19, 1996 | EF2 | 51 km | 27.4 mi | 0 |
| Jul 19, 1996 | EF2 | 47 km | 6.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
2 wildfires (100+ acres) recorded within 100 km. Largest: BEAR DEN (945 acres, 2014).
| Year | Name | Acres Burned | Distance |
| 2014 | BEAR DEN | 945 | 96 km |
| 2005 | UNNAMED | 510 | 92 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 2.8 in | Coldest |
| February | 29°F (-2°C) | 2.7 in | Driest |
| March | 38°F (3°C) | 3.6 in | |
| April | 48°F (9°C) | 3.5 in | |
| May | 58°F (15°C) | 4.3 in | |
| June | 66°F (19°C) | 4.4 in | |
| July | 71°F (22°C) | 4.6 in | Warmest, Wettest |
| August | 69°F (21°C) | 4.0 in | |
| September | 63°F (17°C) | 3.8 in | |
| October | 52°F (11°C) | 3.0 in | |
| November | 42°F (5°C) | 3.6 in | |
| December | 32°F (-0°C) | 3.2 in |
Jacksonville CDP (Indiana County) has a seasonal temperature swing of 44°F / from 27°F in January to 71°F in July. Total annual precipitation is 43.5 inches, with July being the wettest month (4.6") and February the driest (2.7").