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Weather & Climate in Basco, IL

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

Basco experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 26°F in January while summers reach 76°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 40.1 inches. The area receives 23.1 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 633 feet.

Temperature

26°F Jan (-3°C) 76°F Jul (25°C)
Annual Average52.8°F
2% below US avg
January Average26°F (-3°C)
July Average76°F (25°C)
Sunny Days275 days/yr

Geography

Elevation633 ft (193 m)
Area0.2 sq mi (0.6 km²)
Population Density332/sq mi
Coordinates40.3278°N, 91.1995°W
TimezoneAmerica/Chicago
CountyHancock County County
Nearest AirportQuincy Regional-Baldwin Field (UIN)
27 miles away

Precipitation & Snow

Annual Rainfall 40.1"
6% above US avg
Snowfall 23.1"
Wettest Month (Jul) 4.53"
Driest Month (Feb) 1.38"

Air Quality

AQI Median43.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score31.1 / 100
Social Vulnerability64.8 / 100
Community Resilience61.4 / 100

Hazard Breakdown

Tornado Relatively Low
Hurricane Very Low
Earthquake Very Low
Wildfire Very Low
Flood Very Low
Hail Relatively Low
Strong Wind Relatively Moderate
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

1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.9.

Feb 8, 2004 6 km SSW of Stoutsville, Missouri M2.9 110 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

458 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 11 fatalities, 324 injuries.

Date Rating Distance Path Fatalities
May 13, 1995 EF4 30 km 50.0 mi 0
May 13, 1995 EF4 76 km 7.0 mi 0
Apr 4, 2023 EF3 74 km 19.9 mi 0
May 27, 2019 EF3 77 km 7.3 mi 0
May 10, 2003 EF3 86 km 12.0 mi 0
Apr 8, 1999 EF3 21 km 7.5 mi 0
Jun 21, 1981 EF3 50 km 8.8 mi 1
Jul 23, 1975 EF3 90 km 14.0 mi 2
Jul 23, 1975 EF3 78 km 11.1 mi 0
Jun 13, 1975 EF3 89 km 6.6 mi 0
Apr 13, 1974 EF3 25 km 11.0 mi 0
Sep 30, 1973 EF3 25 km 0.1 mi 0
May 1, 1973 EF3 46 km 3.6 mi 2
Apr 20, 1973 EF3 73 km 9.5 mi 0
Apr 21, 1967 EF3 97 km 0.1 mi 0
Apr 16, 1967 EF3 87 km 19.4 mi 2
Jan 24, 1967 EF3 96 km 25.0 mi 0
Jan 24, 1967 EF3 86 km 5.1 mi 1
Jan 24, 1967 EF3 39 km 4.3 mi 1
Aug 25, 1965 EF3 61 km 3.0 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 88 km
2002 HSB 03 2 1,130 88 km
2000 DESTRUST A 756 89 km
2006 HSB 003 674 87 km
2004 HSB 009 608 89 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 26°F (-3°C) 1.4 in Coldest
February 29°F (-2°C) 1.4 in Driest
March 41°F (5°C) 2.9 in
April 53°F (11°C) 3.7 in
May 63°F (17°C) 4.5 in
June 72°F (22°C) 3.9 in
July 76°F (25°C) 4.5 in Warmest, Wettest
August 74°F (23°C) 3.5 in
September 66°F (19°C) 4.5 in
October 55°F (13°C) 3.1 in
November 41°F (5°C) 2.7 in
December 29°F (-2°C) 2.1 in

Basco has a seasonal temperature swing of 51°F / from 26°F in January to 76°F in July. Total annual precipitation is 38.2 inches, with July being the wettest month (4.5") and February the driest (1.4").

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