All Countries
Weather & Climate in Donnellson, IL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Donnellson enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 30°F in January while summers reach 78°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 42.1 inches. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 617 feet.
Temperature
30°F Jan (-1°C)
78°F Jul (25°C)
| Annual Average | 55.5°F |
| 3% above US avg | |
| January Average | 30°F (-1°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 617 ft (188 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 359/sq mi |
| Coordinates | 39.0305°N, 89.4756°W |
| Timezone | America/Chicago |
| County | Montgomery County County |
| Nearest Airport | St Louis Regional (ALN) 32 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 65.4 / 100 |
| Social Vulnerability | 55.4 / 100 |
| Community Resilience | 76.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
35 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.4.
| May 30, 2015 | 4 km ENE of Geff, Illinois | M3.4 | 116 km | 26 km |
| Mar 2, 1990 | 9 km NW of Vernon, Illinois | M3.4 | 33 km | 0 km |
| Aug 27, 1993 | 5 km SSE of Olympian Village, Missouri | M3.3 | 134 km | 22 km |
| May 13, 2025 | 7 km SSW of Lerna, Illinois | M3.3 | 106 km | 10 km |
| May 2, 2003 | 10 km ENE of Thompsonville, Illinois | M3.2 | 138 km | 0 km |
| Jan 29, 1993 | 7 km WNW of Brownstown, Illinois | M3.2 | 39 km | 5 km |
| Apr 6, 1994 | 2 km NE of Tamaroa, Illinois | M3.2 | 100 km | 15 km |
| Oct 24, 1990 | 5 km ENE of Woodlawn, Illinois | M3.2 | 88 km | 1 km |
| Jul 1, 2017 | 9 km SSE of Mulberry Grove, Illinois | M3.1 | 29 km | 17 km |
| Jan 23, 1991 | 3 km WSW of Logan, Illinois | M3.1 | 132 km | 1 km |
| Feb 28, 1994 | 5 km NW of Harrison, Illinois | M3.0 | 134 km | 5 km |
| Sep 5, 2004 | 3 km WNW of Saint Peter, Illinois | M2.9 | 53 km | 33 km |
| Apr 24, 1990 | 5 km SW of Newton, Illinois | M2.9 | 111 km | 18 km |
| Sep 5, 1995 | 3 km N of Woodlawn, Illinois | M2.9 | 84 km | 4 km |
| May 18, 2006 | 9 km SSE of De Soto, Missouri | M2.9 | 142 km | 6 km |
| Apr 29, 2022 | 1 km SSW of Peerless Park, Missouri | M2.8 | 105 km | 8 km |
| Mar 28, 2024 | 1 km NNE of Germantown, Illinois | M2.8 | 51 km | 24 km |
| May 5, 2008 | 3 km SSE of Fenton, Missouri | M2.8 | 101 km | 19 km |
| Sep 13, 1997 | 3 km SSE of Darmstadt, Illinois | M2.8 | 85 km | 16 km |
| Sep 10, 2023 | 9 km E of Parkersburg, Illinois | M2.7 | 141 km | 21 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
655 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 41 fatalities, 682 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Nov 17, 2013 | EF4 | 68 km | 10.6 mi | 2 |
| Apr 22, 2011 | EF4 | 93 km | 21.3 mi | 0 |
| Apr 3, 1981 | EF4 | 66 km | 11.9 mi | 0 |
| Dec 18, 1957 | EF4 | 90 km | 16.8 mi | 1 |
| Jun 14, 1957 | EF4 | 82 km | 4.3 mi | 2 |
| Dec 10, 2021 | EF3 | 59 km | 4.2 mi | 6 |
| Dec 1, 2018 | EF3 | 43 km | 12.5 mi | 0 |
| May 31, 2013 | EF3 | 64 km | 10.6 mi | 0 |
| Apr 19, 2011 | EF3 | 55 km | 4.3 mi | 0 |
| Apr 21, 2002 | EF3 | 100 km | 31.5 mi | 1 |
| Jun 1, 1999 | EF3 | 36 km | 10.0 mi | 1 |
| Apr 19, 1996 | EF3 | 91 km | 14.5 mi | 0 |
| May 9, 1995 | EF3 | 97 km | 50.0 mi | 0 |
| Nov 15, 1988 | EF3 | 64 km | 9.0 mi | 0 |
| May 1, 1983 | EF3 | 75 km | 4.0 mi | 0 |
| May 1, 1983 | EF3 | 74 km | 16.0 mi | 0 |
| Dec 2, 1982 | EF3 | 60 km | 10.5 mi | 2 |
| Apr 7, 1980 | EF3 | 79 km | 7.3 mi | 0 |
| Jul 26, 1978 | EF3 | 90 km | 8.9 mi | 0 |
| Aug 21, 1977 | EF3 | 84 km | 26.9 mi | 6 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 2.0 in | Coldest, Driest |
| February | 32°F (-0°C) | 2.1 in | |
| March | 43°F (6°C) | 3.5 in | |
| April | 54°F (12°C) | 4.0 in | |
| May | 64°F (18°C) | 4.3 in | Wettest |
| June | 73°F (23°C) | 4.1 in | |
| July | 78°F (25°C) | 3.5 in | Warmest |
| August | 75°F (24°C) | 3.1 in | |
| September | 68°F (20°C) | 3.2 in | |
| October | 56°F (13°C) | 2.9 in | |
| November | 44°F (7°C) | 3.7 in | |
| December | 33°F (0°C) | 3.0 in |
Donnellson has a seasonal temperature swing of 48°F / from 30°F in January to 78°F in July. Total annual precipitation is 39.3 inches, with May being the wettest month (4.3") and January the driest (2.0").