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Weather & Climate in Unadilla, NY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Unadilla experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 22°F in January while summers reach 69°F in July. The area gets 246 sunny days per year, above the national average. Annual precipitation totals 45.3 inches. Air quality is rated Good with a median AQI of 36. The city sits at an elevation of 1,020 feet.
Temperature
22°F Jan (-6°C)
69°F Jul (21°C)
| Annual Average | 45.8°F |
| 15% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 1,020 ft (311 m) |
| Area | 1.0 sq mi (2.7 km²) |
| Population Density | 1,096/sq mi |
| Coordinates | 42.3274°N, 75.3149°W |
| Timezone | America/New_York |
| County | Chenango County County |
| Nearest Airport | Albert S Nader Regional (ONH) 19 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 72.3 / 100 |
| Social Vulnerability | 57.9 / 100 |
| Community Resilience | 57.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
15 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.
| Jun 17, 1991 | 7 km NE of Worcester, New York | M4.0 | 62 km | 5 km |
| Jul 31, 1997 | 0 km WSW of Lyons Falls, New York | M3.2 | 144 km | 5 km |
| Dec 13, 2009 | 15 km N of Medusa, New York | M3.2 | 103 km | 10 km |
| Jul 24, 2007 | 12 km SSW of Altamont, New York | M3.1 | 103 km | 15 km |
| May 18, 2009 | 15 km N of Medusa, New York | M3.1 | 102 km | 9 km |
| Oct 21, 2009 | 15 km N of Medusa, New York | M2.9 | 103 km | 7 km |
| Jun 10, 2025 | 10 km NW of Forksville, Pennsylvania | M2.8 | 141 km | 8 km |
| Mar 22, 2009 | 9 km SW of Altamont, New York | M2.8 | 104 km | 16 km |
| Aug 27, 2011 | 5 km WSW of Altamont, New York | M2.8 | 108 km | 22 km |
| Aug 25, 2011 | 5 km WSW of Altamont, New York | M2.7 | 108 km | 18 km |
| Feb 18, 2009 | 15 km N of Medusa, New York | M2.7 | 103 km | 9 km |
| Feb 27, 2008 | 2 km SW of Central Bridge, New York | M2.7 | 88 km | 6 km |
| Feb 20, 2009 | 15 km SSW of Altamont, New York | M2.7 | 104 km | 8 km |
| Jul 24, 2007 | 13 km SSW of Altamont, New York | M2.6 | 103 km | 14 km |
| Dec 13, 2009 | 14 km N of Medusa, New York | M2.6 | 103 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
1 hurricane (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 1985 | Gloria | Category 1 | 86 mph | 213 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
146 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 10 fatalities, 85 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 10, 1989 | EF4 | 85 km | 42.0 mi | 0 |
| Jun 2, 1998 | EF3 | 99 km | 26.0 mi | 2 |
| May 31, 1998 | EF3 | 75 km | 62.0 mi | 0 |
| May 31, 1998 | EF3 | 29 km | 5.0 mi | 0 |
| Jul 16, 2024 | EF2 | 99 km | 5.3 mi | 0 |
| Apr 22, 2023 | EF2 | 66 km | 10.0 mi | 0 |
| Jul 8, 2014 | EF2 | 78 km | 2.5 mi | 4 |
| Apr 28, 2011 | EF2 | 45 km | 7.4 mi | 0 |
| Jul 23, 2010 | EF2 | 73 km | 25.7 mi | 0 |
| May 16, 2009 | EF2 | 67 km | 5.7 mi | 0 |
| May 31, 1998 | EF2 | 40 km | 1.0 mi | 0 |
| Sep 18, 1991 | EF2 | 63 km | 4.0 mi | 0 |
| Jul 23, 1990 | EF2 | 92 km | 17.0 mi | 0 |
| Oct 14, 1989 | EF2 | 42 km | 2.0 mi | 2 |
| Oct 1, 1986 | EF2 | 62 km | 0.1 mi | 0 |
| Sep 18, 1977 | EF2 | 64 km | 2.0 mi | 0 |
| Jun 16, 1976 | EF2 | 46 km | 0.1 mi | 0 |
| Jun 9, 1972 | EF2 | 78 km | 0.3 mi | 0 |
| May 9, 1961 | EF2 | 73 km | 6.8 mi | 0 |
| Sep 19, 1954 | EF2 | 90 km | 1.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
2 wildfires (100+ acres) recorded within 100 km. Largest: CHERRYTOWN FIRE (943 acres, 2006).
| Year | Name | Acres Burned | Distance |
| 2006 | CHERRYTOWN FIRE | 943 | 94 km |
| 2024 | WHITEHOUSE | 607 | 86 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 2.8 in | |
| February | 21°F (-6°C) | 2.6 in | Coldest, Driest |
| March | 31°F (-1°C) | 3.3 in | |
| April | 42°F (6°C) | 3.6 in | |
| May | 54°F (12°C) | 4.1 in | |
| June | 62°F (17°C) | 4.2 in | Wettest |
| July | 69°F (21°C) | 3.9 in | Warmest |
| August | 66°F (19°C) | 3.9 in | |
| September | 58°F (15°C) | 3.7 in | |
| October | 47°F (9°C) | 3.5 in | |
| November | 37°F (3°C) | 3.8 in | |
| December | 26°F (-3°C) | 3.4 in |
Unadilla has a seasonal temperature swing of 48°F / from 21°F in February to 69°F in July. Total annual precipitation is 42.8 inches, with June being the wettest month (4.2") and February the driest (2.6").