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Weather & Climate in Alexis, IL

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Alexis experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 74°F in July. The area gets 275 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 39.1 inches. The area receives 21.8 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 698 feet.

Temperature

22°F Jan (-5°C) 74°F Jul (23°C)
Annual Average50.0°F
7% below US avg
January Average22°F (-5°C)
July Average74°F (23°C)
Sunny Days275 days/yr

Geography

Elevation698 ft (213 m)
Area0.2 sq mi (0.5 km²)
Population Density1,498/sq mi
Coordinates41.0629°N, 90.5554°W
TimezoneAmerica/Chicago
CountyMercer County County
Nearest AirportQuad Cities International (MLI)
27 miles away

Precipitation & Snow

Annual Rainfall 39.1"
3% above US avg
Snowfall 21.8"
Wettest Month (Jul) 4.37"
Driest Month (Feb) 1.38"

Air Quality

AQI Median43.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score8.8 / 100
Social Vulnerability10.6 / 100
Community Resilience85.7 / 100

Hazard Breakdown

Tornado Very Low
Hurricane Very Low
Earthquake Very Low
Wildfire Very Low
Flood Very Low
Hail Very Low
Strong Wind Relatively Moderate
Heat Wave Relatively Low
Winter Weather Relatively Low
Lightning Relatively Moderate
Ice Storm Relatively Moderate
Drought Relatively Moderate
Cold Wave Relatively Low
Landslide Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.

Jun 28, 2004 12 km NW of Dayton, Illinois M4.2 145 km 10 km
Sep 2, 1999 8 km W of Amboy, Illinois M3.5 119 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

659 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 11 fatalities, 514 injuries.

Date Rating Distance Path Fatalities
Nov 17, 2013 EF4 97 km 46.4 mi 3
May 13, 1995 EF4 80 km 7.0 mi 0
May 13, 1995 EF4 83 km 50.0 mi 0
Mar 29, 1981 EF4 85 km 5.1 mi 0
Jun 29, 1976 EF4 74 km 4.9 mi 0
Apr 11, 1965 EF4 93 km 91.5 mi 1
Apr 4, 2023 EF3 84 km 19.9 mi 0
Jun 1, 2007 EF3 58 km 15.8 mi 0
May 10, 2003 EF3 99 km 17.5 mi 0
May 13, 1995 EF3 89 km 25.0 mi 0
May 9, 1995 EF3 63 km 10.0 mi 0
May 9, 1995 EF3 69 km 22.0 mi 0
Mar 13, 1990 EF3 64 km 15.5 mi 0
May 8, 1988 EF3 79 km 32.0 mi 0
Jun 21, 1981 EF3 93 km 8.8 mi 1
Aug 15, 1978 EF3 30 km 6.4 mi 0
Mar 4, 1976 EF3 84 km 0.8 mi 0
Jul 23, 1975 EF3 63 km 14.0 mi 2
Jul 23, 1975 EF3 60 km 11.1 mi 0
Jun 13, 1975 EF3 50 km 6.6 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 45 km
2002 HSB 03 2 1,130 46 km
2000 DESTRUST A 756 46 km
2006 HSB 003 674 45 km
2004 HSB 009 608 46 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 22°F (-5°C) 1.4 in Coldest
February 27°F (-3°C) 1.4 in Driest
March 39°F (4°C) 2.7 in
April 51°F (11°C) 3.8 in
May 62°F (17°C) 4.1 in
June 71°F (22°C) 4.3 in
July 74°F (23°C) 4.4 in Warmest, Wettest
August 73°F (23°C) 4.0 in
September 65°F (18°C) 3.7 in
October 53°F (12°C) 2.9 in
November 39°F (4°C) 2.6 in
December 27°F (-3°C) 2.1 in

Alexis has a seasonal temperature swing of 52°F / from 22°F in January to 74°F in July. Total annual precipitation is 37.3 inches, with July being the wettest month (4.4") and February the driest (1.4").

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