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Weather & Climate in Wilton, ME
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Wilton has a cool climate with an average annual temperature of 43°F (6°C). Winters average 16°F in January while summers reach 67°F in July. The area gets 251 sunny days per year, above the national average. Annual precipitation totals 49.5 inches (wetter than the 38-inch national average). The area receives 93.9 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 622 feet.
Temperature
16°F Jan (-9°C)
67°F Jul (19°C)
| Annual Average | 42.8°F |
| 21% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 251 days/yr |
Geography
| Elevation | 622 ft (190 m) |
| Area | 4.1 sq mi (10.6 km²) |
| Population Density | 445/sq mi |
| Coordinates | 44.5944°N, 70.2375°W |
| Timezone | America/New_York |
| County | Oxford County County |
| Nearest Airport | Berlin Regional (BML) 46 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 65.9 / 100 |
| Social Vulnerability | 56.7 / 100 |
| Community Resilience | 67.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
| Avalanche | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
36 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Oct 16, 2012 | 5 km W of Hollis Center, Maine | M4.7 | 116 km | 16 km |
| Feb 26, 1999 | 0 km NW of China, Maine | M3.8 | 58 km | 3 km |
| Jun 16, 1995 | 8 km N of Lisbon, New Hampshire | M3.8 | 138 km | 5 km |
| Aug 21, 1996 | 12 km N of Livermore, New Hampshire | M3.8 | 100 km | 10 km |
| Jan 17, 2000 | 4 km NNE of Dixfield, Maine | M3.6 | 16 km | 16 km |
| Jan 3, 2000 | 4 km W of Leeds, Maine | M3.5 | 32 km | 10 km |
| Jan 14, 2023 | 7 km ESE of Dedham, Maine | M3.3 | 132 km | 10 km |
| Oct 25, 2001 | 4 km S of Howland, Maine | M3.3 | 141 km | 9 km |
| Sep 7, 2000 | 7 km WSW of Liberty, Maine | M3.2 | 73 km | 5 km |
| Sep 5, 1994 | 13 km NNE of Monhegan, Maine | M3.1 | 114 km | 5 km |
| Dec 25, 1999 | 4 km NE of Saint Albans, Maine | M3.0 | 79 km | 5 km |
| Nov 20, 1994 | 4 km WNW of Norway, Maine | M3.0 | 49 km | 5 km |
| Mar 30, 2010 | 7 km WSW of Dedham, Maine | M3.0 | 118 km | 4 km |
| Apr 25, 2023 | 4 km SW of Center Sandwich, New Hampshire | M2.9 | 134 km | 8 km |
| Feb 4, 2022 | 0 km SSW of Gorham, New Hampshire | M2.9 | 78 km | 8 km |
| Jul 28, 2024 | 6 km W of Gardiner, Maine | M2.8 | 50 km | 8 km |
| Feb 12, 1995 | 1 km NNE of Turner, Maine | M2.8 | 36 km | 5 km |
| Mar 9, 2020 | 50 km ESE of Old Orchard Beach, Maine | M2.7 | 149 km | 12 km |
| Jan 17, 2018 | 3 km E of Richmond, Maine | M2.7 | 68 km | 9 km |
| Feb 17, 1995 | 7 km WSW of Greene, Maine | M2.7 | 47 km | 8 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 |
| 1991 | Bob | Category 1 | — | 223 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
67 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 4 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 9, 2000 | EF2 | 52 km | 3.0 mi | 0 |
| Jul 8, 1996 | EF2 | 41 km | 1.5 mi | 0 |
| Nov 7, 1971 | EF2 | 41 km | 4.1 mi | 0 |
| Jul 31, 1971 | EF2 | 30 km | 2.0 mi | 0 |
| Jul 31, 1971 | EF2 | 11 km | 1.9 mi | 0 |
| Jul 31, 1971 | EF2 | 26 km | 0.5 mi | 0 |
| Aug 20, 1962 | EF2 | 70 km | 0.1 mi | 0 |
| Sep 4, 1961 | EF2 | 48 km | 0.5 mi | 0 |
| Jul 1, 2017 | EF1 | 77 km | 0.3 mi | 0 |
| Jul 1, 2017 | EF1 | 76 km | 1.5 mi | 0 |
| Jul 1, 2017 | EF1 | 71 km | 2.5 mi | 0 |
| Jul 15, 2014 | EF1 | 74 km | 2.8 mi | 0 |
| Jun 1, 2011 | EF1 | 39 km | 8.4 mi | 0 |
| Jun 1, 2011 | EF1 | 41 km | 0.3 mi | 0 |
| Jun 5, 2010 | EF1 | 47 km | 4.2 mi | 0 |
| Aug 21, 2009 | EF1 | 49 km | 16.4 mi | 0 |
| Nov 24, 2005 | EF1 | 92 km | 3.8 mi | 0 |
| May 31, 2002 | EF1 | 40 km | 2.1 mi | 0 |
| Jun 17, 2001 | EF1 | 45 km | 0.4 mi | 0 |
| Jul 18, 2000 | EF1 | 36 km | 0.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.6 m (12 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2008 | MAINE | Avalanche | 3.6 m | — | 98 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 16°F (-9°C) | 3.4 in | Coldest |
| February | 19°F (-7°C) | 2.9 in | Driest |
| March | 29°F (-2°C) | 3.8 in | |
| April | 41°F (5°C) | 3.9 in | |
| May | 53°F (12°C) | 3.8 in | |
| June | 62°F (17°C) | 4.1 in | |
| July | 67°F (19°C) | 3.6 in | Warmest |
| August | 65°F (18°C) | 3.8 in | |
| September | 56°F (14°C) | 3.6 in | |
| October | 46°F (8°C) | 4.0 in | |
| November | 35°F (2°C) | 4.4 in | Wettest |
| December | 22°F (-6°C) | 4.0 in |
Wilton has a seasonal temperature swing of 51°F / from 16°F in January to 67°F in July. Total annual precipitation is 45.3 inches, with November being the wettest month (4.4") and February the driest (2.9").