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Weather & Climate in Clinton CDP (Armstrong County), PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Clinton CDP (Armstrong County) experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 26°F in January while summers reach 72°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 44.3 inches. Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 801 feet.
Temperature
26°F Jan (-3°C)
72°F Jul (22°C)
| Annual Average | 49.6°F |
| 8% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 801 ft (244 m) |
| Area | 0.3 sq mi (0.9 km²) |
| Population Density | 297/sq mi |
| Coordinates | 40.7062°N, 79.5917°W |
| Timezone | America/New_York |
| County | Armstrong County County |
| Nearest Airport | Pittsburgh/Butler Regional (BTP) 19 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 69.3 / 100 |
| Social Vulnerability | 42.9 / 100 |
| Community Resilience | 86.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very 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 Moderate |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
5 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 | 110 km | 5 km |
| Mar 30, 2024 | 2 km SSW of Maple Ridge, Ohio | M3.0 | 125 km | 6 km |
| Aug 7, 2000 | 2 km S of Limaville, Ohio | M2.9 | 134 km | 5 km |
| Sep 11, 2024 | 4 km WNW of Claysville, Pennsylvania | M2.5 | 97 km | 4 km |
| Dec 17, 1990 | 5 km SSE of Middleboro, Pennsylvania | M2.5 | 146 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
285 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 23 fatalities, 590 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1998 | EF4 | 80 km | 36.5 mi | 0 |
| May 31, 1985 | EF4 | 94 km | 29.0 mi | 7 |
| May 31, 1985 | EF4 | 94 km | 69.0 mi | 0 |
| Jun 3, 1980 | EF4 | 13 km | 11.8 mi | 0 |
| May 31, 1985 | EF3 | 75 km | 39.0 mi | 9 |
| Jul 11, 1976 | EF3 | 40 km | 11.8 mi | 1 |
| May 2, 1972 | EF3 | 100 km | 7.9 mi | 0 |
| Aug 3, 1963 | EF3 | 49 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 35 km | 10.8 mi | 0 |
| May 11, 2024 | EF2 | 63 km | 5.8 mi | 0 |
| Aug 25, 2023 | EF2 | 84 km | 2.0 mi | 0 |
| Mar 31, 2022 | EF2 | 23 km | 8.6 mi | 0 |
| Oct 21, 2021 | EF2 | 94 km | 15.7 mi | 0 |
| Oct 2, 2018 | EF2 | 65 km | 1.6 mi | 0 |
| Oct 2, 2018 | EF2 | 60 km | 4.1 mi | 0 |
| Mar 23, 2011 | EF2 | 49 km | 9.0 mi | 0 |
| Nov 10, 2002 | EF2 | 95 km | 7.0 mi | 1 |
| Apr 28, 2002 | EF2 | 34 km | 5.0 mi | 0 |
| Apr 9, 2001 | EF2 | 87 km | 4.0 mi | 0 |
| Jun 2, 1998 | EF2 | 100 km | 15.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: UNNAMED (628 acres, 1990).
| Year | Name | Acres Burned | Distance |
| 1990 | UNNAMED | 628 | 92 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 2.5 in | Coldest |
| February | 29°F (-2°C) | 2.4 in | Driest |
| March | 38°F (3°C) | 3.3 in | |
| April | 48°F (9°C) | 3.4 in | |
| May | 58°F (15°C) | 4.0 in | |
| June | 67°F (19°C) | 4.3 in | Wettest |
| July | 72°F (22°C) | 4.2 in | Warmest |
| August | 70°F (21°C) | 3.9 in | |
| September | 63°F (17°C) | 3.6 in | |
| October | 51°F (11°C) | 2.9 in | |
| November | 42°F (5°C) | 3.2 in | |
| December | 31°F (-0°C) | 3.0 in |
Clinton CDP (Armstrong County) has a seasonal temperature swing of 45°F / from 26°F in January to 72°F in July. Total annual precipitation is 40.7 inches, with June being the wettest month (4.3") and February the driest (2.4").