Weather & Climate in Ophiem, IL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ophiem experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 23°F in January while summers reach 76°F in July. Annual precipitation totals 37.4 inches. The area receives 26.8 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 696 feet.
Temperature
23°F Jan (-5°C)
76°F Jul (24°C)
| Annual Average | 51.2°F |
| 5% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 76°F (24°C) |
Geography
| Elevation | 696 ft (212 m) |
| Area | 1.2 sq mi (3.1 km²) |
| Population Density | 126/sq mi |
| Coordinates | 41.2538°N, 90.3827°W |
| Timezone | America/Chicago |
| County | Henry County County |
| Nearest Airport | Quad Cities International (MLI) 15 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 57.1 / 100 |
| Social Vulnerability | 14.8 / 100 |
| Community Resilience | 83.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
3 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 | 126 km | 10 km |
| Sep 2, 1999 | 8 km W of Amboy, Illinois | M3.5 | 95 km | 5 km |
| Jul 15, 2024 | 2 km WNW of Somonauk, Illinois | M3.1 | 146 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
657 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 18 fatalities, 465 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Nov 17, 2013 | EF4 | 98 km | 46.4 mi | 3 |
| May 13, 1995 | EF4 | 99 km | 7.0 mi | 0 |
| Mar 29, 1981 | EF4 | 60 km | 5.1 mi | 0 |
| Jun 29, 1976 | EF4 | 73 km | 4.9 mi | 0 |
| Apr 11, 1965 | EF4 | 80 km | 91.5 mi | 1 |
| Feb 28, 2017 | EF3 | 94 km | 17.8 mi | 0 |
| Jun 1, 2007 | EF3 | 68 km | 15.8 mi | 0 |
| Apr 20, 2004 | EF3 | 92 km | 15.8 mi | 8 |
| May 9, 1995 | EF3 | 55 km | 10.0 mi | 0 |
| May 9, 1995 | EF3 | 49 km | 22.0 mi | 0 |
| Mar 13, 1990 | EF3 | 39 km | 15.5 mi | 0 |
| May 8, 1988 | EF3 | 64 km | 32.0 mi | 0 |
| Aug 15, 1978 | EF3 | 33 km | 6.4 mi | 0 |
| Mar 4, 1976 | EF3 | 68 km | 0.8 mi | 0 |
| Jul 23, 1975 | EF3 | 78 km | 14.0 mi | 2 |
| Jul 23, 1975 | EF3 | 78 km | 11.1 mi | 0 |
| Jun 13, 1975 | EF3 | 65 km | 6.6 mi | 0 |
| Jun 20, 1974 | EF3 | 81 km | 10.6 mi | 1 |
| Jun 14, 1974 | EF3 | 28 km | 48.6 mi | 0 |
| May 13, 1974 | EF3 | 45 km | 3.6 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
5 wildfires (100+ acres) recorded within 100 km. Largest: UNIT 3 (1,206 acres, 1999).
| Year | Name | Acres Burned | Distance |
| 1999 | UNIT 3 | 1,206 | 61 km |
| 2002 | HSB 03 2 | 1,130 | 62 km |
| 2000 | DESTRUST A | 756 | 62 km |
| 2006 | HSB 003 | 674 | 62 km |
| 2004 | HSB 009 | 608 | 62 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 1.7 in | Coldest, Driest |
| February | 28°F (-2°C) | 1.9 in | |
| March | 40°F (4°C) | 2.4 in | |
| April | 51°F (11°C) | 3.7 in | |
| May | 63°F (17°C) | 4.8 in | Wettest |
| June | 72°F (22°C) | 4.1 in | |
| July | 76°F (24°C) | 3.9 in | Warmest |
| August | 73°F (23°C) | 3.5 in | |
| September | 66°F (19°C) | 3.5 in | |
| October | 54°F (12°C) | 2.9 in | |
| November | 40°F (5°C) | 2.8 in | |
| December | 29°F (-2°C) | 2.2 in |
Ophiem has a seasonal temperature swing of 52°F / from 23°F in January to 76°F in July. Total annual precipitation is 37.4 inches, with May being the wettest month (4.8") and January the driest (1.7").