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Weather & Climate in Sinnamahoning, PA

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Sinnamahoning experiences four distinct seasons with an average annual temperature of 47°F (9°C). Winters average 24°F in January while summers reach 69°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 43.1 inches. The area receives 38.6 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 907 feet.

Temperature

24°F Jan (-4°C) 69°F Jul (21°C)
Annual Average47.3°F
12% below US avg
January Average24°F (-4°C)
July Average69°F (21°C)
Sunny Days275 days/yr

Geography

Elevation907 ft (276 m)
Area0.6 sq mi (1.6 km²)
Population Density68/sq mi
Coordinates41.3223°N, 78.0957°W
TimezoneAmerica/New_York
CountyCameron County County
Nearest AirportState College Regional (SCE)
33 miles away

Precipitation & Snow

Annual Rainfall 43.1"
14% above US avg
Snowfall 38.6"
Wettest Month (Jun) 4.69"
Driest Month (Jan) 2.52"

Air Quality

AQI Median40.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score12.6 / 100
Social Vulnerability77.9 / 100
Community Resilience85.3 / 100

Hazard Breakdown

Tornado Very Low
Hurricane Very Low
Earthquake Very Low
Wildfire Very Low
Flood Relatively Low
Hail Very Low
Strong Wind Very Low
Heat Wave Very Low
Winter Weather Relatively Low
Lightning Very Low
Ice Storm Very Low
Drought No Rating
Cold Wave Very Low
Landslide Relatively Low
Avalanche Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.4.

Jun 13, 2019 9 km N of Blain, Pennsylvania M3.4 112 km 27 km
Feb 3, 2001 6 km W of Bath, New York M3.2 128 km 0 km
Jun 10, 2025 10 km NW of Forksville, Pennsylvania M2.8 122 km 8 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

134 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 12 fatalities, 149 injuries.

Date Rating Distance Path Fatalities
May 31, 1985 EF4 51 km 69.0 mi 0
May 31, 1985 EF4 85 km 29.0 mi 4
Jul 21, 2003 EF3 68 km 2.5 mi 0
May 31, 1985 EF3 81 km 19.0 mi 6
Jul 29, 1976 EF3 70 km 25.0 mi 0
Sep 3, 1963 EF3 54 km 8.4 mi 0
May 15, 1961 EF3 96 km 3.0 mi 0
Apr 19, 2019 EF2 97 km 4.9 mi 0
Oct 2, 2018 EF2 92 km 4.1 mi 0
Oct 2, 2018 EF2 80 km 2.2 mi 0
Jul 19, 1996 EF2 84 km 27.4 mi 0
Sep 26, 1994 EF2 82 km 3.5 mi 0
Sep 18, 1991 EF2 76 km 4.0 mi 0
Nov 20, 1989 EF2 81 km 3.5 mi 0
May 31, 1985 EF2 76 km 19.0 mi 0
May 2, 1983 EF2 86 km 9.8 mi 0
Jun 9, 1980 EF2 88 km 7.4 mi 0
Apr 9, 1980 EF2 93 km 0.1 mi 0
Jul 11, 1976 EF2 92 km 28.7 mi 1
Jun 5, 1975 EF2 65 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 61 km
2009 WOODRUFF 757 71 km
2018 FIELDS RUN 711 23 km
2006 FIVE MILE FIRE 658 18 km
2006 OKOME ROAD 573 59 km
2006 BEAR TRAP 561 23 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 24°F (-4°C) 2.5 in Coldest, Driest
February 26°F (-4°C) 2.6 in
March 34°F (1°C) 3.3 in
April 45°F (7°C) 3.2 in
May 56°F (13°C) 4.0 in
June 64°F (18°C) 4.7 in Wettest
July 69°F (21°C) 4.2 in Warmest
August 67°F (19°C) 3.7 in
September 60°F (15°C) 3.7 in
October 49°F (9°C) 3.1 in
November 39°F (4°C) 3.6 in
December 29°F (-2°C) 3.0 in

Sinnamahoning has a seasonal temperature swing of 45°F / from 24°F in January to 69°F in July. Total annual precipitation is 41.7 inches, with June being the wettest month (4.7") and January the driest (2.5").

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