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Weather & Climate in Lyons, SD

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

Lyons experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 16°F in January while summers reach 74°F in July. The area gets 291 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 28.3 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 35. The city sits at an elevation of 1,567 feet.

Temperature

16°F Jan (-9°C) 74°F Jul (24°C)
Annual Average46.6°F
14% below US avg
January Average16°F (-9°C)
July Average74°F (24°C)
Sunny Days291 days/yr

Geography

Elevation1,567 ft (478 m)
Area13.8 sq mi (35.8 km²)
Population Density188/sq mi
Coordinates43.7249°N, 96.8662°W
TimezoneAmerica/Chicago
CountyMinnehaha County County
Nearest AirportJoe Foss Field (FSD)
12 miles away

Precipitation & Snow

Annual Rainfall 28.3"
26% below US avg
Wettest Month (Jun) 3.66"
Driest Month (Jan) 0.51"

Air Quality

AQI Median35.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score89.5 / 100
Social Vulnerability14.1 / 100
Community Resilience86.9 / 100

Hazard Breakdown

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

Earthquake History

6 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.

Oct 25, 1990 8 km N of Plankinton, South Dakota M3.6 129 km 5 km
Feb 6, 1996 1 km N of Wausa, Nebraska M3.6 146 km 5 km
Jul 26, 2002 0 km WSW of Huron, South Dakota M3.1 129 km 5 km
Jan 4, 2021 5 km N of Tyndall, South Dakota M3.1 111 km 5 km
Jan 16, 2022 9 km NE of Plankinton, South Dakota M2.5 123 km 5 km
Mar 6, 2024 6 km SSE of Santee, Nebraska M2.5 129 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

622 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 12 fatalities, 320 injuries.

Date Rating Distance Path Fatalities
Jun 16, 1992 EF5 69 km 16.0 mi 1
Jun 25, 2010 EF4 80 km 13.7 mi 0
Jun 24, 2003 EF4 95 km 10.0 mi 0
May 30, 1998 EF4 65 km 14.0 mi 6
Jun 7, 1993 EF4 4 km 54.0 mi 0
Jun 7, 1993 EF4 37 km 10.0 mi 0
Jun 16, 1992 EF4 81 km 7.0 mi 0
Jun 7, 1965 EF4 68 km 7.8 mi 1
Jul 7, 1955 EF4 99 km 30.0 mi 1
Aug 7, 1994 EF3 87 km 4.5 mi 0
Jun 7, 1993 EF3 19 km 6.0 mi 0
Jun 7, 1993 EF3 32 km 6.0 mi 0
Jun 7, 1993 EF3 34 km 5.0 mi 0
May 7, 1993 EF3 38 km 10.0 mi 0
Jun 16, 1992 EF3 74 km 4.0 mi 0
Jun 16, 1992 EF3 66 km 3.0 mi 0
Jun 16, 1992 EF3 94 km 12.0 mi 0
Apr 20, 1985 EF3 65 km 8.0 mi 0
Aug 3, 1981 EF3 55 km 12.8 mi 0
Jul 5, 1978 EF3 69 km 8.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 16°F (-9°C) 0.5 in Coldest, Driest
February 20°F (-7°C) 0.6 in
March 32°F (-0°C) 1.6 in
April 46°F (8°C) 2.4 in
May 59°F (15°C) 3.0 in
June 68°F (20°C) 3.7 in Wettest
July 74°F (24°C) 2.9 in Warmest
August 70°F (21°C) 2.9 in
September 61°F (16°C) 2.7 in
October 48°F (9°C) 1.8 in
November 31°F (-0°C) 1.1 in
December 18°F (-8°C) 0.7 in

Lyons has a seasonal temperature swing of 58°F / from 16°F in January to 74°F in July. Total annual precipitation is 23.9 inches, with June being the wettest month (3.7") and January the driest (0.5").

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