Weather & Climate in Lenzburg, IL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Lenzburg enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 34°F in January while summers reach 79°F in July. Annual precipitation totals 45.0 inches. The area receives 11.6 inches of snow annually. The city sits at an elevation of 442 feet.
Temperature
34°F Jan (1°C)
79°F Jul (26°C)
| Annual Average | 57.7°F |
| 7% above US avg | |
| January Average | 34°F (1°C) |
| July Average | 79°F (26°C) |
Geography
| Elevation | 442 ft (135 m) |
| Area | 0.5 sq mi (1.3 km²) |
| Population Density | 442/sq mi |
| Coordinates | 38.2864°N, 89.8178°W |
| Timezone | America/Chicago |
| County | St. Clair County County |
| Nearest Airport | St Louis Regional (ALN) 43 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 94.9 / 100 |
| Social Vulnerability | 37.9 / 100 |
| Community Resilience | 74.9 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively High |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively High |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
61 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Sep 26, 1990 | 4 km SE of Chaffee, Missouri | M4.8 | 127 km | 1 km |
| Feb 5, 1994 | 2 km WNW of Dongola, Illinois | M4.2 | 116 km | 16 km |
| Jun 7, 2011 | 18 km NNW of Potosi, Missouri | M3.9 | 98 km | 21 km |
| Jan 2, 2006 | 3 km NNE of Eldorado, Illinois | M3.6 | 132 km | 7 km |
| May 1, 2016 | 5 km SE of New Grand Chain, Illinois | M3.5 | 140 km | 16 km |
| Mar 2, 1990 | 9 km NW of Vernon, Illinois | M3.4 | 84 km | 0 km |
| May 30, 2015 | 4 km ENE of Geff, Illinois | M3.4 | 129 km | 26 km |
| Aug 27, 1993 | 5 km SSE of Olympian Village, Missouri | M3.3 | 58 km | 22 km |
| May 2, 2003 | 10 km ENE of Thompsonville, Illinois | M3.2 | 107 km | 0 km |
| Apr 6, 1994 | 2 km NE of Tamaroa, Illinois | M3.2 | 55 km | 15 km |
| Jan 29, 1993 | 7 km WNW of Brownstown, Illinois | M3.2 | 108 km | 5 km |
| Oct 24, 1990 | 5 km ENE of Woodlawn, Illinois | M3.2 | 74 km | 1 km |
| Dec 27, 1992 | 2 km E of Pocahontas, Missouri | M3.2 | 89 km | 10 km |
| Jul 1, 2017 | 9 km SSE of Mulberry Grove, Illinois | M3.1 | 81 km | 17 km |
| Jan 23, 1991 | 3 km WSW of Logan, Illinois | M3.1 | 91 km | 1 km |
| Mar 12, 2002 | 6 km S of Marble Hill, Missouri | M3.1 | 116 km | 10 km |
| Jun 27, 2005 | 6 km E of Grand Tower, Illinois | M3.0 | 81 km | 10 km |
| Feb 28, 1994 | 5 km NW of Harrison, Illinois | M3.0 | 64 km | 5 km |
| Mar 1, 2006 | 2 km N of Buncombe, Illinois | M3.0 | 114 km | 6 km |
| Sep 5, 2004 | 3 km WNW of Saint Peter, Illinois | M2.9 | 105 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
646 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 92 fatalities, 1,640 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Dec 18, 1957 | EF5 | 55 km | 5.4 mi | 1 |
| Feb 28, 2017 | EF4 | 65 km | 53.5 mi | 1 |
| Nov 17, 2013 | EF4 | 35 km | 10.6 mi | 2 |
| Apr 22, 2011 | EF4 | 77 km | 21.3 mi | 0 |
| Sep 22, 2006 | EF4 | 67 km | 27.5 mi | 0 |
| May 29, 1982 | EF4 | 81 km | 17.0 mi | 10 |
| Apr 3, 1981 | EF4 | 55 km | 11.9 mi | 0 |
| Jun 22, 1969 | EF4 | 89 km | 15.1 mi | 4 |
| Jan 24, 1967 | EF4 | 77 km | 25.0 mi | 3 |
| Feb 10, 1959 | EF4 | 73 km | 23.9 mi | 21 |
| Dec 18, 1957 | EF4 | 64 km | 16.8 mi | 1 |
| Dec 18, 1957 | EF4 | 72 km | 28.3 mi | 11 |
| Feb 24, 1956 | EF4 | 98 km | 77.6 mi | 6 |
| Dec 10, 2021 | EF3 | 56 km | 4.2 mi | 6 |
| Oct 24, 2021 | EF3 | 83 km | 16.7 mi | 0 |
| Oct 24, 2021 | EF3 | 97 km | 18.8 mi | 0 |
| May 31, 2013 | EF3 | 93 km | 31.7 mi | 0 |
| May 31, 2013 | EF3 | 64 km | 10.6 mi | 0 |
| Dec 31, 2010 | EF3 | 61 km | 6.7 mi | 1 |
| Mar 11, 2006 | EF3 | 48 km | 5.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
16 wildfires (100+ acres) recorded within 100 km. Largest: RED SHALE UNIT RX (2,123 acres, 2021).
| Year | Name | Acres Burned | Distance |
| 2021 | RED SHALE UNIT RX | 2,123 | 94 km |
| 2024 | RED SHALE RX | 1,259 | 94 km |
| 2019 | KINKAID RX | 1,215 | 62 km |
| 2022 | KINKAID STATE FISH AND WILDLIFE AREA RX | 1,115 | 62 km |
| 2021 | STATE OF ILLINOIS TRACT RX | 1,011 | 53 km |
| 2021 | MILL CREEK RX | 898 | 90 km |
| 2024 | HAMPTON NORTH RX | 807 | 92 km |
| 2005 | UNNAMED | 741 | 81 km |
| 2018 | UNNAMED | 729 | 60 km |
| 1995 | UNNAMED | 724 | 81 km |
| 2024 | HERRIN FLATS RX | 713 | 95 km |
| 2020 | UNNAMED | 687 | 60 km |
| 2024 | HAMPTON RX | 628 | 93 km |
| 1989 | UNNAMED | 600 | 100 km |
| 2022 | BLOWDOWN 16 RX | 553 | 64 km |
| 2019 | PINE HILLS RX | 542 | 91 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 34°F (1°C) | 2.8 in | Coldest |
| February | 38°F (4°C) | 2.4 in | Driest |
| March | 48°F (9°C) | 3.6 in | |
| April | 58°F (15°C) | 4.9 in | |
| May | 68°F (20°C) | 4.9 in | |
| June | 76°F (24°C) | 5.2 in | Wettest |
| July | 79°F (26°C) | 4.8 in | Warmest |
| August | 77°F (25°C) | 3.3 in | |
| September | 70°F (21°C) | 3.4 in | |
| October | 60°F (15°C) | 3.0 in | |
| November | 48°F (9°C) | 3.8 in | |
| December | 37°F (3°C) | 2.9 in |
Lenzburg has a seasonal temperature swing of 45°F / from 34°F in January to 79°F in July. Total annual precipitation is 45.0 inches, with June being the wettest month (5.2") and February the driest (2.4").