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Weather & Climate in Olivet, IL

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Olivet experiences four distinct seasons with an average annual temperature of 52°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 40.4 inches. The area receives 23.7 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 671 feet.

Temperature

25°F Jan (-4°C) 74°F Jul (23°C)
Annual Average51.5°F
5% below US avg
January Average25°F (-4°C)
July Average74°F (23°C)
Sunny Days293 days/yr

Geography

Elevation671 ft (205 m)
Area2.4 sq mi (6.2 km²)
Population Density103/sq mi
Coordinates39.9461°N, 87.6396°W
TimezoneAmerica/Chicago
CountyVermillion County County
Nearest AirportVermilion Regional (DNV)
18 miles away

Precipitation & Snow

Annual Rainfall 40.4"
6% above US avg
Snowfall 23.7"
Wettest Month (Jul) 4.45"
Driest Month (Jan) 2.05"

Air Quality

AQI Median43.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score23.4 / 100
Social Vulnerability49.7 / 100
Community Resilience74.2 / 100

Hazard Breakdown

Tornado Relatively Low
Hurricane Very Low
Earthquake Relatively Low
Wildfire Very Low
Flood Very Low
Hail Relatively Low
Strong Wind Relatively Low
Heat Wave Very Low
Winter Weather Relatively Low
Lightning Very Low
Ice Storm Relatively Low
Drought Relatively Low
Cold Wave Relatively Low
Landslide Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

11 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.

Jun 17, 2021 Illinois-Indiana border region M3.8 33 km 6 km
Nov 11, 1991 3 km W of Flat Rock, Illinois M3.8 116 km 0 km
Dec 20, 1990 5 km S of Stilesville, Indiana M3.7 95 km 5 km
Apr 14, 2000 4 km NW of Heritage Lake, Indiana M3.6 79 km 5 km
May 13, 2025 7 km SSW of Lerna, Illinois M3.3 88 km 10 km
Dec 17, 1990 Illinois-Indiana border region M3.2 53 km 10 km
May 10, 2012 0 km NW of Emison, Indiana M3.1 128 km 11 km
Dec 16, 1996 3 km NNE of Terre Haute, Indiana M3.1 54 km 5 km
Apr 24, 1990 5 km SW of Newton, Illinois M2.9 120 km 18 km
May 10, 2012 1 km NNW of Emison, Indiana M2.7 127 km 9 km
Mar 15, 2025 6 km W of Dwight, Illinois M2.6 146 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

582 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 60 fatalities, 821 injuries.

Date Rating Distance Path Fatalities
Apr 26, 1994 EF4 83 km 14.0 mi 3
Mar 20, 1976 EF4 80 km 16.7 mi 0
Apr 3, 1974 EF4 75 km 108.7 mi 18
Apr 11, 1965 EF4 81 km 21.8 mi 0
Apr 11, 1965 EF4 66 km 45.7 mi 28
Nov 17, 2013 EF3 82 km 37.9 mi 0
Nov 17, 2013 EF3 55 km 29.8 mi 0
Nov 17, 2013 EF3 60 km 18.7 mi 0
Apr 19, 1996 EF3 33 km 2.0 mi 1
Apr 19, 1996 EF3 54 km 4.0 mi 0
Nov 22, 1992 EF3 68 km 12.0 mi 0
Jun 2, 1980 EF3 51 km 18.1 mi 1
Jun 25, 1978 EF3 78 km 27.4 mi 0
Aug 10, 1974 EF3 64 km 0.1 mi 0
Apr 3, 1974 EF3 51 km 5.9 mi 1
Apr 3, 1974 EF3 37 km 14.9 mi 0
Apr 3, 1974 EF3 40 km 25.9 mi 0
May 15, 1968 EF3 75 km 7.1 mi 0
Apr 29, 1963 EF3 48 km 5.6 mi 0
Apr 22, 1963 EF3 95 km 31.8 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 25°F (-4°C) 2.1 in Coldest, Driest
February 29°F (-2°C) 2.1 in
March 41°F (5°C) 3.2 in
April 52°F (11°C) 4.0 in
May 63°F (17°C) 4.4 in
June 72°F (22°C) 4.2 in
July 74°F (23°C) 4.5 in Warmest, Wettest
August 73°F (23°C) 4.0 in
September 66°F (19°C) 3.2 in
October 55°F (13°C) 3.0 in
November 42°F (6°C) 3.6 in
December 31°F (-1°C) 2.9 in

Olivet has a seasonal temperature swing of 49°F / from 25°F in January to 74°F in July. Total annual precipitation is 41.0 inches, with July being the wettest month (4.5") and January the driest (2.1").

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