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Weather & Climate in Vermilion, IL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Vermilion experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 25°F in January while summers reach 74°F in July. The area gets 293 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 42.7 inches. The area receives 19.1 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 672 feet.
Temperature
25°F Jan (-4°C)
74°F Jul (23°C)
| Annual Average | 51.4°F |
| 5% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 672 ft (205 m) |
| Area | 0.8 sq mi (2.0 km²) |
| Population Density | 353/sq mi |
| Coordinates | 39.5802°N, 87.5880°W |
| Timezone | America/Chicago |
| County | Edgar County County |
| Nearest Airport | Terre Haute Regional (HUF) 17 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 34.9 / 100 |
| Social Vulnerability | 32.6 / 100 |
| Community Resilience | 70.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very 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: M5.2.
| Apr 18, 2008 | 7 km NNE of Bellmont, Illinois | M5.2 | 128 km | 14 km |
| Apr 18, 2008 | 9 km NNE of Bellmont, Illinois | M4.7 | 127 km | 15 km |
| Apr 21, 2008 | 7 km NNE of Bellmont, Illinois | M4.0 | 128 km | 18 km |
| Jun 17, 2021 | Illinois-Indiana border region | M3.8 | 38 km | 6 km |
| Nov 11, 1991 | 3 km W of Flat Rock, Illinois | M3.8 | 76 km | 0 km |
| Sep 19, 2017 | 4 km N of Bellmont, Illinois | M3.8 | 132 km | 12 km |
| Apr 25, 2008 | 8 km NNE of Bellmont, Illinois | M3.7 | 128 km | 13 km |
| Dec 20, 1990 | 5 km S of Stilesville, Indiana | M3.7 | 82 km | 5 km |
| Nov 20, 2012 | 7 km N of Bellmont, Illinois | M3.6 | 128 km | 19 km |
| Apr 14, 2000 | 4 km NW of Heritage Lake, Indiana | M3.6 | 75 km | 5 km |
| Jun 5, 2008 | 8 km WNW of Mount Carmel, Illinois | M3.4 | 127 km | 16 km |
| May 30, 2015 | 4 km ENE of Geff, Illinois | M3.4 | 141 km | 26 km |
| May 1, 2008 | 8 km NNE of Bellmont, Illinois | M3.3 | 128 km | 14 km |
| May 13, 2025 | 7 km SSW of Lerna, Illinois | M3.3 | 68 km | 10 km |
| Dec 17, 1990 | Illinois-Indiana border region | M3.2 | 71 km | 10 km |
| Jan 29, 1993 | 7 km WNW of Brownstown, Illinois | M3.2 | 138 km | 5 km |
| Dec 16, 1996 | 3 km NNE of Terre Haute, Indiana | M3.1 | 18 km | 5 km |
| Jul 18, 2008 | 6 km NNE of Bellmont, Illinois | M3.1 | 129 km | 18 km |
| May 10, 2012 | 0 km NW of Emison, Indiana | M3.1 | 87 km | 11 km |
| Sep 9, 2017 | 4 km N of Bellmont, Illinois | M3.1 | 132 km | 12 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
499 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 52 fatalities, 635 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1990 | EF4 | 91 km | 12.5 mi | 0 |
| Apr 11, 1965 | EF4 | 78 km | 45.7 mi | 28 |
| Mar 31, 2023 | EF3 | 86 km | 40.9 mi | 6 |
| Mar 31, 2023 | EF3 | 80 km | 5.9 mi | 2 |
| Nov 17, 2013 | EF3 | 70 km | 18.7 mi | 0 |
| Nov 17, 2013 | EF3 | 88 km | 29.8 mi | 0 |
| Sep 20, 2002 | EF3 | 92 km | 112.0 mi | 0 |
| Apr 19, 1996 | EF3 | 68 km | 2.0 mi | 1 |
| Apr 19, 1996 | EF3 | 79 km | 4.0 mi | 0 |
| Nov 22, 1992 | EF3 | 94 km | 15.0 mi | 0 |
| Nov 22, 1992 | EF3 | 61 km | 12.0 mi | 0 |
| Nov 22, 1992 | EF3 | 89 km | 5.3 mi | 0 |
| Mar 10, 1986 | EF3 | 95 km | 35.0 mi | 0 |
| Jun 2, 1980 | EF3 | 71 km | 18.1 mi | 1 |
| Aug 21, 1977 | EF3 | 93 km | 26.9 mi | 6 |
| Aug 10, 1974 | EF3 | 51 km | 0.1 mi | 0 |
| Aug 10, 1974 | EF3 | 83 km | 0.1 mi | 0 |
| Apr 3, 1974 | EF3 | 71 km | 5.9 mi | 1 |
| Apr 3, 1974 | EF3 | 78 km | 25.9 mi | 0 |
| Apr 3, 1974 | EF3 | 58 km | 14.9 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 2.2 in | Coldest, Driest |
| February | 30°F (-1°C) | 2.2 in | |
| March | 41°F (5°C) | 3.4 in | |
| April | 52°F (11°C) | 4.0 in | |
| May | 63°F (17°C) | 4.3 in | |
| June | 72°F (22°C) | 4.0 in | |
| July | 74°F (23°C) | 4.5 in | Warmest, Wettest |
| August | 73°F (23°C) | 4.0 in | |
| September | 67°F (19°C) | 3.2 in | |
| October | 55°F (13°C) | 2.8 in | |
| November | 43°F (6°C) | 3.7 in | |
| December | 31°F (-0°C) | 3.0 in |
Vermilion has a seasonal temperature swing of 49°F / from 25°F in January to 74°F in July. Total annual precipitation is 41.3 inches, with July being the wettest month (4.5") and January the driest (2.2").