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Weather & Climate in Allendale, IL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Allendale experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 30°F in January while summers reach 77°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 46.6 inches (wetter than the 38-inch national average). The area receives 15.5 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 479 feet.
Temperature
30°F Jan (-1°C)
77°F Jul (25°C)
| Annual Average | 54.9°F |
| 2% above US avg | |
| January Average | 30°F (-1°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 479 ft (146 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 1,584/sq mi |
| Coordinates | 38.5276°N, 87.7103°W |
| Timezone | America/Chicago |
| County | Wabash County County |
| Nearest Airport | Lawrenceville-Vincennes International (LWV) 17 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 24.8 / 100 |
| Social Vulnerability | 52.6 / 100 |
| Community Resilience | 56.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| 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
69 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 | 18 km | 14 km |
| Apr 18, 2008 | 9 km NNE of Bellmont, Illinois | M4.7 | 16 km | 15 km |
| Jun 18, 2002 | 6 km SW of Parkers Settlement, Indiana | M4.6 | 59 km | 16 km |
| Apr 21, 2008 | 7 km NNE of Bellmont, Illinois | M4.0 | 17 km | 18 km |
| Jan 24, 1990 | 6 km WNW of Alton, Indiana | M3.9 | 115 km | 10 km |
| Dec 7, 2000 | 7 km W of Evansville, Indiana | M3.9 | 62 km | 5 km |
| Jun 17, 2021 | Illinois-Indiana border region | M3.8 | 149 km | 6 km |
| Jan 27, 1990 | 6 km N of Alton, Indiana | M3.8 | 118 km | 5 km |
| Sep 19, 2017 | 4 km N of Bellmont, Illinois | M3.8 | 21 km | 12 km |
| Nov 11, 1991 | 3 km W of Flat Rock, Illinois | M3.8 | 42 km | 0 km |
| Apr 25, 2008 | 8 km NNE of Bellmont, Illinois | M3.7 | 17 km | 13 km |
| Jan 2, 2006 | 3 km NNE of Eldorado, Illinois | M3.6 | 98 km | 7 km |
| Nov 20, 2012 | 7 km N of Bellmont, Illinois | M3.6 | 19 km | 19 km |
| Jun 5, 2008 | 8 km WNW of Mount Carmel, Illinois | M3.4 | 14 km | 16 km |
| Mar 2, 1990 | 9 km NW of Vernon, Illinois | M3.4 | 132 km | 0 km |
| May 30, 2015 | 4 km ENE of Geff, Illinois | M3.4 | 57 km | 26 km |
| May 1, 2008 | 8 km NNE of Bellmont, Illinois | M3.3 | 15 km | 14 km |
| May 13, 2025 | 7 km SSW of Lerna, Illinois | M3.3 | 107 km | 10 km |
| Oct 24, 1990 | 5 km ENE of Woodlawn, Illinois | M3.2 | 112 km | 1 km |
| Jan 29, 1993 | 7 km WNW of Brownstown, Illinois | M3.2 | 127 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
473 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 51 fatalities, 703 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 3, 1974 | EF5 | 98 km | 68.0 mi | 6 |
| Jun 2, 1990 | EF4 | 68 km | 12.5 mi | 0 |
| Jun 2, 1990 | EF4 | 73 km | 106.0 mi | 1 |
| Jun 2, 1990 | EF4 | 21 km | 13.0 mi | 6 |
| Jun 2, 1990 | EF4 | 66 km | 23.0 mi | 0 |
| Jan 7, 1989 | EF4 | 8 km | 19.0 mi | 0 |
| Jul 9, 2024 | EF3 | 68 km | 5.8 mi | 0 |
| Mar 31, 2023 | EF3 | 52 km | 40.9 mi | 6 |
| Feb 28, 2017 | EF3 | 56 km | 44.1 mi | 1 |
| Nov 17, 2013 | EF3 | 94 km | 14.1 mi | 0 |
| Mar 28, 2009 | EF3 | 99 km | 12.4 mi | 0 |
| Oct 18, 2007 | EF3 | 97 km | 7.0 mi | 0 |
| Nov 15, 2005 | EF3 | 53 km | 12.0 mi | 0 |
| Nov 6, 2005 | EF3 | 78 km | 41.3 mi | 24 |
| Apr 21, 2002 | EF3 | 91 km | 31.5 mi | 1 |
| Apr 19, 1996 | EF3 | 100 km | 17.0 mi | 0 |
| Jun 2, 1990 | EF3 | 59 km | 7.0 mi | 0 |
| Apr 3, 1989 | EF3 | 32 km | 3.1 mi | 0 |
| Aug 10, 1974 | EF3 | 83 km | 0.1 mi | 0 |
| Apr 1, 1974 | EF3 | 22 km | 3.3 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: RICEVILLE RX (671 acres, 2010).
| Year | Name | Acres Burned | Distance |
| 2010 | RICEVILLE RX | 671 | 95 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 2.6 in | Coldest, Driest |
| February | 34°F (1°C) | 2.7 in | |
| March | 44°F (7°C) | 4.1 in | |
| April | 55°F (13°C) | 4.4 in | |
| May | 65°F (18°C) | 4.9 in | Wettest |
| June | 74°F (23°C) | 4.1 in | |
| July | 77°F (25°C) | 4.1 in | Warmest |
| August | 75°F (24°C) | 3.7 in | |
| September | 69°F (20°C) | 3.1 in | |
| October | 57°F (14°C) | 3.2 in | |
| November | 45°F (7°C) | 4.2 in | |
| December | 35°F (1°C) | 3.4 in |
Allendale has a seasonal temperature swing of 47°F / from 30°F in January to 77°F in July. Total annual precipitation is 44.4 inches, with May being the wettest month (4.9") and January the driest (2.6").