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Weather & Climate in Calais, ME
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Calais has a cool climate with an average annual temperature of 44°F (7°C). Winters average 20°F in January while summers reach 67°F in July. The area gets 234 sunny days per year, above the national average. Annual precipitation totals 54.7 inches (wetter than the 38-inch national average). The area receives 95.0 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 209 feet.
Temperature
20°F Jan (-7°C)
67°F Jul (19°C)
| Annual Average | 44.2°F |
| 18% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 234 days/yr |
Geography
| Elevation | 209 ft (64 m) |
| Area | 40.1 sq mi (103.9 km²) |
| Population Density | 90/sq mi |
| Coordinates | 45.1430°N, 67.2175°W |
| Timezone | America/New_York |
| County | Washington County County |
| Nearest Airport | Houlton International (HUL) 73 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 47.6 / 100 |
| Social Vulnerability | 86.4 / 100 |
| Community Resilience | 80.6 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
40 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Aug 27, 2015 | 27 km N of Noonan, Canada | M3.6 | 128 km | 5 km |
| Sep 16, 1994 | 7 km SE of Lee, Maine | M3.6 | 81 km | 5 km |
| Sep 16, 1994 | 9 km SE of Lee, Maine | M3.6 | 79 km | 5 km |
| Feb 2, 2016 | 8 km E of Lubec, Maine | M3.6 | 40 km | 5 km |
| Jul 1, 2015 | 30 km NNW of Yarmouth, Canada | M3.5 | 140 km | 5 km |
| Jan 10, 2019 | 22 km NW of Saint John, Canada | M3.4 | 77 km | 5 km |
| Jan 14, 2023 | 7 km ESE of Dedham, Maine | M3.3 | 120 km | 10 km |
| Sep 16, 1994 | 9 km SE of Lee, Maine | M3.3 | 79 km | 5 km |
| Sep 16, 1994 | 9 km SE of Lee, Maine | M3.3 | 79 km | 5 km |
| Oct 25, 2001 | 4 km S of Howland, Maine | M3.3 | 114 km | 9 km |
| Feb 9, 2016 | 7 km NE of Vanceboro, Maine | M3.3 | 52 km | 1 km |
| Jul 25, 2010 | 35 km S of Fundy Bay, Canada | M3.2 | 85 km | 5 km |
| Oct 15, 2003 | 11 km E of Saint Andrews, Canada | M3.1 | 25 km | 18 km |
| Aug 17, 2022 | 3 km SE of Centerville, Maine | M3.0 | 61 km | 5 km |
| Mar 30, 2010 | 7 km WSW of Dedham, Maine | M3.0 | 132 km | 4 km |
| Jan 17, 2021 | 4 km ESE of Centerville, Maine | M2.9 | 60 km | 5 km |
| Mar 14, 2018 | 16 km WNW of Saint John, Canada | M2.9 | 80 km | 2 km |
| Aug 11, 2022 | 4 km E of Centerville, Maine | M2.8 | 58 km | 6 km |
| Aug 11, 2022 | Maine | M2.8 | 59 km | 4 km |
| Jul 25, 2013 | 32 km N of Keswick Ridge, Canada | M2.8 | 129 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
3 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2010 | Earl | Category 1 | 75 mph | 234 km |
| 2008 | Kyle | Category 1 | 75 mph | 170 km |
| 2003 | Juan | Category 2 | 98 mph | 282 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
9 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 6 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Nov 7, 1971 | EF2 | 77 km | 0.1 mi | 0 |
| Sep 15, 1961 | EF2 | 78 km | 19.1 mi | 0 |
| Jul 7, 1954 | EF2 | 15 km | 7.6 mi | 0 |
| Aug 12, 2019 | EF1 | 65 km | 0.2 mi | 0 |
| Jun 10, 1965 | EF1 | 77 km | 1.0 mi | 0 |
| Aug 17, 1959 | EF1 | 99 km | 0.8 mi | 0 |
| Jul 2, 1958 | EF1 | 62 km | 8.9 mi | 0 |
| Jul 17, 2013 | EF0 | 78 km | 0.2 mi | 0 |
| May 29, 1961 | EF0 | 10 km | 4.7 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
4 wildfires (100+ acres) recorded within 100 km. Largest: SUNKEN STR (1,201 acres, 1985).
| Year | Name | Acres Burned | Distance |
| 1985 | SUNKEN STR | 1,201 | 33 km |
| 1984 | UNNAMED | 901 | 70 km |
| 2006 | CENTERVILLE FIRE | 705 | 63 km |
| 2001 | UNNAMED | 627 | 73 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 4.1 in | |
| February | 20°F (-7°C) | 3.1 in | Coldest, Driest |
| March | 30°F (-1°C) | 3.9 in | |
| April | 41°F (5°C) | 3.8 in | |
| May | 52°F (11°C) | 4.0 in | |
| June | 61°F (16°C) | 3.5 in | |
| July | 67°F (19°C) | 3.4 in | Warmest |
| August | 65°F (19°C) | 3.2 in | |
| September | 57°F (14°C) | 3.7 in | |
| October | 47°F (8°C) | 4.1 in | |
| November | 36°F (2°C) | 4.5 in | Wettest |
| December | 24°F (-5°C) | 4.3 in |
Calais has a seasonal temperature swing of 47°F / from 20°F in February to 67°F in July. Total annual precipitation is 45.6 inches, with November being the wettest month (4.5") and February the driest (3.1").