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Weather & Climate in Galva, IL

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

Galva 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 38.7 inches. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 832 feet.

Temperature

22°F Jan (-6°C) 74°F Jul (23°C)
Annual Average49.5°F
8% below US avg
January Average22°F (-6°C)
July Average74°F (23°C)
Sunny Days275 days/yr

Geography

Elevation832 ft (254 m)
Area1.1 sq mi (2.8 km²)
Population Density911/sq mi
Coordinates41.1689°N, 90.0374°W
TimezoneAmerica/Chicago
CountyHenry County County
Nearest AirportQuad Cities International (MLI)
31 miles away

Precipitation & Snow

Annual Rainfall 38.7"
2% above US avg
Wettest Month (Jun) 4.37"
Driest Month (Feb) 1.38"

Air Quality

AQI Median43.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score57.1 / 100
Social Vulnerability14.8 / 100
Community Resilience83.8 / 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

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

Jun 28, 2004 12 km NW of Dayton, Illinois M4.2 100 km 10 km
Sep 2, 1999 8 km W of Amboy, Illinois M3.5 79 km 5 km
Jul 15, 2024 2 km WNW of Somonauk, Illinois M3.1 123 km 10 km
Mar 15, 2025 6 km W of Dwight, Illinois M2.6 129 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

662 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 21 fatalities, 555 injuries.

Date Rating Distance Path Fatalities
Apr 9, 2015 EF4 98 km 30.1 mi 2
Nov 17, 2013 EF4 73 km 46.4 mi 3
Jul 13, 2004 EF4 72 km 9.6 mi 0
May 13, 1995 EF4 92 km 7.0 mi 0
Mar 29, 1981 EF4 57 km 5.1 mi 0
Jun 29, 1976 EF4 48 km 4.9 mi 0
Apr 4, 2023 EF3 96 km 19.9 mi 0
Feb 28, 2017 EF3 93 km 11.5 mi 2
Feb 28, 2017 EF3 64 km 17.8 mi 0
Jun 1, 2007 EF3 97 km 15.8 mi 0
Apr 20, 2004 EF3 64 km 15.8 mi 8
May 10, 2003 EF3 83 km 17.5 mi 0
May 13, 1995 EF3 84 km 25.0 mi 0
May 9, 1995 EF3 83 km 10.0 mi 0
May 9, 1995 EF3 25 km 22.0 mi 0
Mar 13, 1990 EF3 52 km 15.5 mi 0
May 8, 1988 EF3 90 km 32.0 mi 0
Aug 15, 1978 EF3 63 km 6.4 mi 0
Jun 30, 1977 EF3 98 km 6.1 mi 0
Mar 4, 1976 EF3 39 km 0.8 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 89 km
2000 DESTRUST A 756 89 km
2006 HSB 003 674 89 km
2004 HSB 009 608 89 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 22°F (-6°C) 1.5 in Coldest
February 26°F (-4°C) 1.4 in Driest
March 38°F (3°C) 2.8 in
April 50°F (10°C) 3.9 in
May 61°F (16°C) 4.1 in
June 71°F (21°C) 4.4 in Wettest
July 74°F (23°C) 4.2 in Warmest
August 72°F (22°C) 4.2 in
September 64°F (18°C) 3.7 in
October 53°F (12°C) 2.8 in
November 39°F (4°C) 2.7 in
December 26°F (-3°C) 2.2 in

Galva has a seasonal temperature swing of 52°F / from 22°F in January to 74°F in July. Total annual precipitation is 37.8 inches, with June being the wettest month (4.4") and February the driest (1.4").

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