Weather & Climate in Warren, IL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Warren experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 20°F in January while summers reach 72°F in July. Annual precipitation totals 41.7 inches. The area receives 32.1 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 981 feet.
Temperature
20°F Jan (-7°C)
72°F Jul (22°C)
| Annual Average | 47.9°F |
| 11% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 72°F (22°C) |
Geography
| Elevation | 981 ft (299 m) |
| Area | 1.0 sq mi (2.5 km²) |
| Population Density | 1,397/sq mi |
| Coordinates | 42.4948°N, 89.9912°W |
| Timezone | America/Chicago |
| County | Stephenson County County |
| Nearest Airport | Dubuque Regional (DBQ) 37 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 73.9 / 100 |
| Social Vulnerability | 56.7 / 100 |
| Community Resilience | 68.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
6 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.
| Jun 28, 2004 | 12 km NW of Dayton, Illinois | M4.2 | 146 km | 10 km |
| Feb 10, 2010 | 2 km NW of Lily Lake, Illinois | M3.8 | 136 km | 10 km |
| Sep 2, 1999 | 8 km W of Amboy, Illinois | M3.5 | 98 km | 5 km |
| Jul 15, 2024 | 2 km WNW of Somonauk, Illinois | M3.1 | 142 km | 10 km |
| Mar 25, 2015 | 3 km WNW of Lake in the Hills, Illinois | M2.9 | 138 km | 6 km |
| Jun 10, 2013 | 4 km NNE of Virgil, Illinois | M2.6 | 134 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
538 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 43 fatalities, 970 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 7, 1984 | EF5 | 53 km | 36.0 mi | 9 |
| Apr 9, 2015 | EF4 | 92 km | 30.1 mi | 2 |
| Jul 3, 1983 | EF4 | 54 km | 0.5 mi | 0 |
| Mar 29, 1981 | EF4 | 91 km | 5.1 mi | 0 |
| Apr 21, 1967 | EF4 | 93 km | 25.5 mi | 24 |
| Aug 7, 2021 | EF3 | 92 km | 9.4 mi | 0 |
| Jun 16, 2014 | EF3 | 67 km | 1.0 mi | 0 |
| Jan 7, 2008 | EF3 | 96 km | 13.2 mi | 0 |
| Aug 18, 2005 | EF3 | 66 km | 18.6 mi | 1 |
| Jun 19, 1993 | EF3 | 63 km | 14.0 mi | 0 |
| Jul 13, 1992 | EF3 | 100 km | 5.0 mi | 0 |
| Jun 17, 1992 | EF3 | 57 km | 16.0 mi | 0 |
| May 8, 1988 | EF3 | 22 km | 16.0 mi | 0 |
| Aug 5, 1979 | EF3 | 63 km | 5.7 mi | 0 |
| Jun 20, 1974 | EF3 | 62 km | 10.6 mi | 1 |
| Sep 9, 1970 | EF3 | 56 km | 4.7 mi | 0 |
| Aug 2, 1967 | EF3 | 83 km | 0.1 mi | 2 |
| Apr 16, 1967 | EF3 | 6 km | 27.8 mi | 0 |
| Jan 24, 1967 | EF3 | 52 km | 24.9 mi | 0 |
| Jan 24, 1967 | EF3 | 50 km | 7.4 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
3 wildfires (100+ acres) recorded within 100 km. Largest: 2018 BADGER RX BURNS (659 acres, 2018).
| Year | Name | Acres Burned | Distance |
| 2018 | 2018 BADGER RX BURNS | 659 | 100 km |
| 2019 | 2019 BADGER RX BURNS | 627 | 99 km |
| 2009 | COLD SPRINGS | 552 | 36 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 1.6 in | Coldest, Driest |
| February | 24°F (-4°C) | 1.9 in | |
| March | 36°F (2°C) | 2.5 in | |
| April | 48°F (9°C) | 4.0 in | |
| May | 60°F (16°C) | 4.6 in | |
| June | 69°F (21°C) | 5.9 in | Wettest |
| July | 72°F (22°C) | 4.8 in | Warmest |
| August | 70°F (21°C) | 4.2 in | |
| September | 63°F (17°C) | 4.1 in | |
| October | 51°F (10°C) | 3.3 in | |
| November | 37°F (3°C) | 2.8 in | |
| December | 26°F (-4°C) | 2.1 in |
Warren has a seasonal temperature swing of 52°F / from 20°F in January to 72°F in July. Total annual precipitation is 41.8 inches, with June being the wettest month (5.9") and January the driest (1.6").