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Weather & Climate in Bolton Valley, VT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Bolton Valley has a cool climate with an average annual temperature of 43°F (6°C). Winters average 17°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 46.3 inches (wetter than the 38-inch national average). The area receives 125.6 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 31. The city sits at an elevation of 1,834 feet.
Temperature
17°F Jan (-8°C)
67°F Jul (20°C)
| Annual Average | 43.2°F |
| 20% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 67°F (20°C) |
| Sunny Days | 251 days/yr |
Geography
| Elevation | 1,834 ft (559 m) |
| Area | 0.4 sq mi (1.1 km²) |
| Population Density | 402/sq mi |
| Coordinates | 44.4166°N, 72.8575°W |
| Timezone | America/New_York |
| County | Washington County County |
| Nearest Airport | Patrick Leahy Burlington International (BTV) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 31.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 52.2 / 100 |
| Social Vulnerability | 13.0 / 100 |
| Community Resilience | 94.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
60 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.3.
| Apr 20, 2002 | 8 km NNW of Au Sable Forks, New York | M5.3 | 68 km | 5 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 137 km | 8 km |
| Jun 16, 1995 | 8 km N of Lisbon, New Hampshire | M3.8 | 76 km | 5 km |
| Nov 16, 1993 | 5 km SSE of Saint-Édouard, Canada | M3.8 | 99 km | 17 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 122 km | 18 km |
| Aug 21, 1996 | 12 km N of Livermore, New Hampshire | M3.8 | 123 km | 10 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 121 km | 18 km |
| Apr 20, 2000 | 7 km WSW of Newcomb, New York | M3.8 | 123 km | 5 km |
| Jan 9, 2006 | 2 km ESE of Franklin, Canada | M3.7 | 106 km | 13 km |
| Apr 8, 2003 | 17 km ESE of Saint Regis Falls, New York | M3.7 | 120 km | 10 km |
| Apr 20, 2002 | 5 km NNW of Au Sable Forks, New York | M3.7 | 67 km | 5 km |
| Jan 13, 2020 | 5 km SW of Franklin, Canada | M3.4 | 109 km | 6 km |
| Jun 9, 1998 | 3 km N of Dannemora, New York | M3.3 | 78 km | 5 km |
| Aug 20, 1995 | 4 km S of Chambly, Canada | M3.3 | 115 km | 18 km |
| Aug 24, 2011 | 13 km ENE of Saint Regis Falls, New York | M3.2 | 125 km | 5 km |
| May 24, 2002 | 6 km N of Au Sable Forks, New York | M3.1 | 66 km | 10 km |
| Sep 21, 1995 | 3 km W of Huntingdon, Canada | M3.1 | 130 km | 18 km |
| Feb 1, 2024 | 6 km WNW of Huntingdon, Canada | M3.1 | 134 km | 8 km |
| May 6, 2020 | 9 km SE of Bedford, Canada | M3.1 | 72 km | 14 km |
| Mar 11, 2020 | 0 km SSW of South Glens Falls, New York | M3.1 | 140 km | 13 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
2 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 1991 | Bob | Category 1 | — | 277 km |
| 1985 | Gloria | Category 1 | 86 mph | 280 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
43 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 11 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 8, 1983 | EF2 | 26 km | 0.2 mi | 0 |
| Aug 3, 1970 | EF2 | 51 km | 4.5 mi | 0 |
| Aug 11, 1966 | EF2 | 76 km | 9.0 mi | 0 |
| Jul 4, 1963 | EF2 | 60 km | 5.9 mi | 0 |
| May 20, 1962 | EF2 | 43 km | 1.8 mi | 0 |
| Jun 13, 1961 | EF2 | 60 km | 7.9 mi | 0 |
| Jun 24, 1960 | EF2 | 24 km | 2.0 mi | 0 |
| Jun 18, 1957 | EF2 | 65 km | 3.0 mi | 0 |
| May 6, 1952 | EF2 | 91 km | 4.9 mi | 0 |
| Jul 16, 2024 | EF1 | 87 km | 1.8 mi | 0 |
| Jul 18, 2022 | EF1 | 52 km | 0.9 mi | 0 |
| Mar 26, 2021 | EF1 | 49 km | 0.7 mi | 0 |
| Jun 5, 2010 | EF1 | 41 km | 2.1 mi | 0 |
| May 9, 2009 | EF1 | 48 km | 0.6 mi | 0 |
| Jul 18, 2008 | EF1 | 32 km | 0.3 mi | 0 |
| Sep 3, 1993 | EF1 | 79 km | 4.0 mi | 0 |
| Aug 6, 1989 | EF1 | 54 km | 1.5 mi | 0 |
| May 19, 1982 | EF1 | 80 km | 0.1 mi | 0 |
| Jun 22, 1973 | EF1 | 25 km | 0.1 mi | 0 |
| Jun 11, 1973 | EF1 | 28 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: FLAT ROCK FIRE (658 acres, 2018).
| Year | Name | Acres Burned | Distance |
| 2018 | FLAT ROCK FIRE | 658 | 80 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 2.5 in | Coldest |
| February | 17°F (-8°C) | 2.2 in | Driest |
| March | 28°F (-2°C) | 2.9 in | |
| April | 40°F (5°C) | 3.5 in | |
| May | 53°F (12°C) | 3.9 in | |
| June | 62°F (16°C) | 4.3 in | |
| July | 67°F (20°C) | 4.4 in | Warmest |
| August | 65°F (18°C) | 5.0 in | Wettest |
| September | 57°F (14°C) | 4.1 in | |
| October | 46°F (8°C) | 3.8 in | |
| November | 35°F (1°C) | 4.1 in | |
| December | 22°F (-6°C) | 3.3 in |
Bolton Valley has a seasonal temperature swing of 50°F / from 17°F in January to 67°F in July. Total annual precipitation is 44.1 inches, with August being the wettest month (5.0") and February the driest (2.2").