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Weather & Climate in Welton, IA

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

Welton experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 20°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 39.6 inches. The area receives 39.8 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 694 feet.

Temperature

20°F Jan (-7°C) 74°F Jul (23°C)
Annual Average49.0°F
9% below US avg
January Average20°F (-7°C)
July Average74°F (23°C)
Sunny Days275 days/yr

Geography

Elevation694 ft (212 m)
Area0.3 sq mi (0.7 km²)
Population Density535/sq mi
Coordinates41.9079°N, 90.5969°W
TimezoneAmerica/Chicago
CountyClinton County County
Nearest AirportQuad Cities International (MLI)
32 miles away

Precipitation & Snow

Annual Rainfall 39.6"
4% above US avg
Snowfall 39.8"
Wettest Month (Jun) 4.49"
Driest Month (Feb) 1.14"

Air Quality

AQI Median43.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score64.8 / 100
Social Vulnerability34.6 / 100
Community Resilience87.5 / 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 Low
Lightning Relatively Low
Ice Storm Relatively Moderate
Drought Relatively High
Cold Wave Relatively Moderate
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 M4.2 150 km 10 km
Sep 2, 1999 8 km W of Amboy, Illinois M3.5 99 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

656 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 6 fatalities, 255 injuries.

Date Rating Distance Path Fatalities
Mar 13, 1990 EF4 77 km 19.0 mi 0
Mar 29, 1981 EF4 59 km 5.1 mi 0
Aug 12, 1974 EF4 88 km 5.0 mi 0
Apr 11, 1965 EF4 28 km 91.5 mi 1
Apr 30, 1954 EF4 98 km 80.4 mi 0
Jun 1, 2007 EF3 86 km 15.8 mi 0
May 9, 1995 EF3 43 km 10.0 mi 0
May 9, 1995 EF3 95 km 22.0 mi 0
Jun 19, 1993 EF3 96 km 9.0 mi 0
Jun 19, 1993 EF3 47 km 14.0 mi 0
Jul 13, 1992 EF3 53 km 5.0 mi 0
Mar 13, 1990 EF3 43 km 15.5 mi 0
May 8, 1988 EF3 81 km 16.0 mi 0
May 8, 1988 EF3 23 km 32.0 mi 0
Aug 5, 1979 EF3 85 km 5.7 mi 0
Aug 15, 1978 EF3 73 km 6.4 mi 0
Jun 20, 1974 EF3 28 km 10.6 mi 1
Jun 14, 1974 EF3 59 km 48.6 mi 0
May 13, 1974 EF3 32 km 3.6 mi 0
Jul 12, 1971 EF3 88 km 0.1 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 98 km
2002 HSB 03 2 1,130 98 km
2000 DESTRUST A 756 97 km
2006 HSB 003 674 98 km
2004 HSB 009 608 97 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 20°F (-7°C) 1.3 in Coldest
February 24°F (-4°C) 1.1 in Driest
March 36°F (2°C) 2.4 in
April 49°F (9°C) 3.4 in
May 61°F (16°C) 3.9 in
June 70°F (21°C) 4.5 in Wettest
July 74°F (23°C) 3.9 in Warmest
August 71°F (22°C) 4.3 in
September 63°F (17°C) 4.0 in
October 52°F (11°C) 2.6 in
November 37°F (3°C) 2.4 in
December 24°F (-4°C) 1.9 in

Welton has a seasonal temperature swing of 53°F / from 20°F in January to 74°F in July. Total annual precipitation is 35.6 inches, with June being the wettest month (4.5") and February the driest (1.1").

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