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Weather & Climate in Hannibal, NY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Hannibal experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 25°F in January while summers reach 72°F in July. The area gets 246 sunny days per year, above the national average. Annual precipitation totals 43.1 inches. The area receives 140.1 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 36. The city sits at an elevation of 344 feet.
Temperature
25°F Jan (-4°C)
72°F Jul (22°C)
| Annual Average | 48.7°F |
| 10% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 344 ft (105 m) |
| Area | 1.2 sq mi (3.0 km²) |
| Population Density | 583/sq mi |
| Coordinates | 43.3194°N, 76.5777°W |
| Timezone | America/New_York |
| County | Oswego County County |
| Nearest Airport | Syracuse Hancock International (SYR) 28 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 67.6 / 100 |
| Social Vulnerability | 40.5 / 100 |
| Community Resilience | 87.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | No Rating |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Coastal Flood | Very 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: M3.6.
| Dec 25, 1998 | 23 km SE of Cobourg, Canada | M3.6 | 123 km | 18 km |
| Apr 23, 2023 | New York | M3.6 | 75 km | 9 km |
| Jun 29, 2024 | 14 km W of Ellisburg, New York | M3.3 | 49 km | 5 km |
| Feb 3, 2001 | 6 km W of Bath, New York | M3.2 | 127 km | 0 km |
| Jul 31, 1997 | 0 km WSW of Lyons Falls, New York | M3.2 | 103 km | 5 km |
| Aug 4, 2004 | 30 km SSW of Cobourg, Canada | M3.0 | 142 km | 5 km |
| Nov 7, 2002 | 13 km SSW of Belleville, Canada | M3.0 | 106 km | 18 km |
| Jul 19, 2007 | 27 km S of Cobourg, Canada | M3.0 | 138 km | 5 km |
| Jun 5, 2009 | 4 km SSE of Attica, New York | M2.9 | 146 km | 5 km |
| Aug 11, 2007 | 4 km N of Kingston, Canada | M2.6 | 106 km | 4 km |
| Mar 29, 2020 | 11 km N of Lyndonville, New York | M2.6 | 145 km | 5 km |
| Mar 15, 2022 | 5 km SSW of Warsaw, New York | M2.6 | 146 km | 5 km |
| Apr 14, 2023 | 1 km W of Adams Center, New York | M2.6 | 75 km | 6 km |
| Apr 11, 2007 | 6 km NNE of Sodus Point, New York | M2.6 | 31 km | 7 km |
| Jan 25, 1999 | New York | M2.5 | 122 km | 3 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
90 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 7 fatalities, 15 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 7, 2023 | EF3 | 88 km | 16.0 mi | 0 |
| May 2, 1983 | EF3 | 17 km | 20.0 mi | 1 |
| May 2, 1983 | EF3 | 25 km | 3.0 mi | 0 |
| May 2, 1983 | EF3 | 99 km | 3.0 mi | 0 |
| Jun 2, 1969 | EF3 | 37 km | 17.5 mi | 0 |
| Jul 16, 2024 | EF2 | 89 km | 5.3 mi | 0 |
| Jul 8, 2014 | EF2 | 84 km | 2.5 mi | 4 |
| Aug 21, 2011 | EF2 | 33 km | 7.9 mi | 0 |
| May 16, 2009 | EF2 | 84 km | 5.7 mi | 0 |
| Aug 28, 1990 | EF2 | 94 km | 2.5 mi | 0 |
| Jul 23, 1990 | EF2 | 84 km | 17.0 mi | 0 |
| Sep 18, 1977 | EF2 | 90 km | 2.0 mi | 0 |
| Jul 16, 2024 | EF1 | 71 km | 1.4 mi | 1 |
| Jul 16, 2024 | EF1 | 81 km | 6.5 mi | 0 |
| Jul 15, 2024 | EF1 | 95 km | 8.7 mi | 0 |
| Jul 10, 2024 | EF1 | 66 km | 2.2 mi | 0 |
| Aug 7, 2023 | EF1 | 80 km | 1.4 mi | 0 |
| Aug 7, 2023 | EF1 | 95 km | 1.3 mi | 0 |
| Aug 7, 2023 | EF1 | 99 km | 9.7 mi | 0 |
| Jul 8, 2021 | EF1 | 96 km | 2.2 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: DRY MARSH (1,018 acres, 2010).
| Year | Name | Acres Burned | Distance |
| 2010 | DRY MARSH | 1,018 | 40 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 3.0 in | |
| February | 24°F (-5°C) | 2.4 in | Coldest, Driest |
| March | 33°F (1°C) | 2.9 in | |
| April | 45°F (7°C) | 3.4 in | |
| May | 56°F (14°C) | 3.2 in | |
| June | 65°F (18°C) | 3.6 in | |
| July | 72°F (22°C) | 3.2 in | Warmest |
| August | 69°F (20°C) | 3.6 in | |
| September | 61°F (16°C) | 4.1 in | |
| October | 50°F (10°C) | 3.6 in | |
| November | 40°F (4°C) | 4.1 in | Wettest |
| December | 28°F (-2°C) | 3.5 in |
Hannibal has a seasonal temperature swing of 48°F / from 24°F in February to 72°F in July. Total annual precipitation is 40.6 inches, with November being the wettest month (4.1") and February the driest (2.4").