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Weather & Climate in Dallas, SD

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

Dallas experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 24°F in January while summers reach 76°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 23.2 inches (drier than the 38-inch national average). The area receives 49.1 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 35. The city sits at an elevation of 2,222 feet.

Temperature

24°F Jan (-5°C) 76°F Jul (25°C)
Annual Average49.7°F
8% below US avg
January Average24°F (-5°C)
July Average76°F (25°C)
Sunny Days291 days/yr

Geography

Elevation2,222 ft (677 m)
Area0.5 sq mi (1.3 km²)
Population Density200/sq mi
Coordinates43.2378°N, 99.5175°W
TimezoneAmerica/Chicago
CountyGregory County County
Nearest AirportAinsworth Regional (ANW)
51 miles away

Precipitation & Snow

Annual Rainfall 23.2"
39% below US avg
Snowfall 49.1"
Wettest Month (Jun) 3.50"
Driest Month (Jan) 0.47"

Air Quality

AQI Median35.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score16.2 / 100
Social Vulnerability18.9 / 100
Community Resilience78.3 / 100

Hazard Breakdown

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

Earthquake History

21 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.

Nov 3, 2002 16 km SSW of Butte, Nebraska M4.3 73 km 5 km
Jun 4, 2021 10 km NE of Anoka, Nebraska M3.7 69 km 5 km
Oct 25, 1990 8 km N of Plankinton, South Dakota M3.6 105 km 5 km
Aug 26, 1991 15 km SSE of Brownlee, Nebraska M3.4 146 km 5 km
Jun 18, 2015 15 km SSE of Valentine, Nebraska M3.3 95 km 5 km
Aug 9, 2011 2 km S of Fort Pierre, South Dakota M3.3 140 km 5 km
Jan 25, 1994 8 km E of Wood Lake, Nebraska M3.3 85 km 5 km
Apr 11, 2016 11 km E of Brownlee, Nebraska M3.2 131 km 5 km
Aug 5, 2022 4 km ENE of Draper, South Dakota M3.2 110 km 9 km
Jan 4, 2021 5 km N of Tyndall, South Dakota M3.1 136 km 5 km
Jul 12, 1998 7 km E of Corn Creek, South Dakota M3.1 134 km 5 km
Jun 4, 2021 9 km ENE of Anoka, Nebraska M3.1 69 km 5 km
Jan 1, 2025 4 km S of Brownlee, Nebraska M3.0 142 km 5 km
Feb 7, 2014 11 km NE of Bijou Hills, South Dakota M3.0 54 km 5 km
Feb 1, 2006 6 km ENE of Bassett, Nebraska M2.9 69 km 5 km
Jan 1, 2020 2 km E of Chambers, Nebraska M2.8 132 km 10 km
Jul 3, 1995 9 km SSW of Fort Thompson, South Dakota M2.8 85 km 5 km
Mar 20, 2010 9 km NNW of Springview, Nebraska M2.7 44 km 5 km
Apr 27, 2025 9 km NE of Burke, South Dakota M2.5 24 km 5 km
Jan 16, 2022 9 km NE of Plankinton, South Dakota M2.5 108 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

318 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 44 injuries.

Date Rating Distance Path Fatalities
May 8, 1965 EF5 31 km 30.1 mi 0
Aug 11, 2011 EF3 94 km 0.5 mi 0
Jun 9, 2003 EF3 98 km 23.0 mi 0
Jun 16, 1992 EF3 91 km 2.0 mi 0
Jul 24, 1971 EF3 61 km 2.5 mi 0
Jul 9, 1971 EF3 72 km 0.1 mi 0
Jul 9, 1971 EF3 94 km 0.1 mi 0
May 8, 1965 EF3 17 km 1.5 mi 0
May 21, 1962 EF3 77 km 11.0 mi 0
May 16, 1962 EF3 50 km 0.1 mi 0
May 15, 1962 EF3 10 km 0.1 mi 0
May 14, 1962 EF3 52 km 53.8 mi 0
May 14, 1962 EF3 94 km 70.4 mi 0
May 22, 2016 EF2 77 km 4.6 mi 0
May 22, 2010 EF2 46 km 9.0 mi 0
May 22, 2010 EF2 32 km 2.9 mi 0
Jun 24, 2009 EF2 68 km 4.6 mi 0
Aug 9, 2002 EF2 29 km 2.0 mi 0
Oct 28, 1998 EF2 91 km 2.0 mi 0
Jun 29, 1993 EF2 32 km 5.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

16 wildfires (100+ acres) recorded within 100 km. Largest: REGION 24 COMPLEX (66,349 acres, 2012).

Year Name Acres Burned Distance
2012 REGION 24 COMPLEX 66,349 67 km
2011 OKREEK 11,115 72 km
2012 UNNAMED 6,910 53 km
1998 TNC 4,683 72 km
2023 NENFR-HFR-FY23-RX-UNITS 35-36-39 2,936 85 km
2012 UNNAMED 2,875 49 km
2024 UNIT 16 RX 2,171 83 km
2000 NOVOTNY AND WAGNER 1,968 30 km
2012 KAYLKOWSKI 1,966 96 km
2011 HIGHWAY 47 1,800 86 km
1988 SIMMONS I 1,764 76 km
2006 VALENTINE 1,721 91 km
2005 CHAOS 1,539 97 km
2014 OKREEK 1,273 71 km
2000 BAD HORSE 1,215 94 km
2023 SDLDR-HFR-FY23-RX-BROKEN ARROW UNITS B-C-D-E-G-H-I 1,185 71 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 24°F (-5°C) 0.5 in Driest
February 26°F (-4°C) 0.6 in
March 35°F (2°C) 1.6 in
April 47°F (8°C) 2.6 in
May 58°F (15°C) 3.4 in
June 68°F (20°C) 3.5 in Wettest
July 76°F (25°C) 3.2 in Warmest
August 73°F (23°C) 2.2 in
September 63°F (17°C) 2.3 in
October 50°F (10°C) 1.5 in
November 34°F (1°C) 0.9 in
December 24°F (-5°C) 0.6 in Coldest

Dallas has a seasonal temperature swing of 53°F / from 24°F in December to 76°F in July. Total annual precipitation is 22.8 inches, with June being the wettest month (3.5") and January the driest (0.5").

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