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Newcastle, WY

Full City Profile · Wyoming · Weston County County

3.2 /5.0
B Good
3,348 Population 1,308/sq mi density
$77,014 Median Income $33,987 per capita
$173,500 Home Value $237,848 Zillow
$711 Median Rent 9.0% income on rent
47°F Avg Temperature 302 sunny days/yr
295 Violent Crime/100K 1,447 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$77,014 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$173,500 home value, $711/mo rent
F
Safety
1.0 / 5.0
295 violent crimes/100K
C
Education
2.4 / 5.0
17.0% bachelor's degree or higher
Newcastle experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 24°F in January while summers reach 73°F in July. The area gets 302 sunny days per year. Annual precipitation totals 17.2 inches. The area receives 38.9 inches of snow annually. Air quality is rated Good with a median AQI of 34.

Temperature

24°F Jan (-4°C) 73°F Jul (23°C)
Annual Average47.3°F
12% below US avg
January Average24°F (-4°C)
July Average73°F (23°C)
Sunny Days302 days/yr

Geography

Elevation4,376 ft (1,334 m)
Area2.6 sq mi (6.6 km²)
Population Density1,308/sq mi
Coordinates43.8503°N, 104.1965°W
TimezoneAmerica/Denver
CountyWeston County County
Nearest AirportEllsworth Afb (RCA)
58 miles away

Precipitation & Snow

Annual Rainfall 17.2"
55% below US avg
Snowfall 38.9"
Wettest Month (May) 2.72"
Driest Month (Jan) 0.47"

Air Quality

AQI Median34.0
RatingGood

Air Pollutants (EPA 2023)

Ozone (O₃)0.0477 ppm
SO₂ (Sulfur Dioxide)1.10 ppb

Natural Hazard Risk

Overall RiskVery Low
Risk Score7.9 / 100
Social Vulnerability21.3 / 100
Community Resilience3.3 / 100

Hazard Breakdown

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

Earthquake History

29 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.2. Most recent: M2.6 on Jun 8, 2025.

Sep 25, 2009 15 km E of Alzada, Montana M4.2 130 km
Jan 28, 1990 8 km N of Manderson-White Horse Creek, South Dakota M4.0 149 km
Aug 29, 2004 16 km NNW of Douglas, Wyoming M3.8 150 km
Apr 9, 1996 34 km SW of Edgemont, South Dakota M3.7 87 km
Feb 6, 1996 13 km WNW of Hill City, South Dakota M3.7 40 km
Mar 9, 2025 7 km W of Fairburn, South Dakota M3.6 75 km
Dec 12, 2013 10 km WSW of Hermosa, South Dakota M3.5 71 km
Feb 15, 2004 19 km N of Douglas, Wyoming M3.5 141 km
Mar 26, 2021 10 km E of Edgemont, South Dakota M3.4 72 km
Mar 2, 1990 7 km N of Manderson-White Horse Creek, South Dakota M3.2 150 km
May 3, 1996 32 km SSW of Edgemont, South Dakota M3.1 91 km
Feb 7, 2007 11 km WSW of Wasta, South Dakota M3.1 131 km
May 10, 2013 25 km NW of Wright, Wyoming M3.1 121 km
Jun 29, 2024 22 km ESE of Hill View Heights, Wyoming M3.0 26 km
Jan 16, 2012 25 km E of Buffalo Gap, South Dakota M3.0 105 km
Sep 27, 2016 43 km WSW of Gillette, Wyoming M3.0 149 km
Nov 2, 1992 5 km ESE of Lusk, Wyoming M3.0 124 km
Jun 30, 1993 25 km N of Douglas, Wyoming M3.0 135 km
Jun 16, 2024 7 km NNE of Buffalo Gap, South Dakota M2.9 82 km
Mar 10, 2011 22 km N of Van Tassell, Wyoming M2.9 110 km
Source: USGS (M2.5+, 1990–2025)

Tornado History

191 tornadoes (EF0+) within 100 km since 1950. Strongest: EF3. Total: 49 injuries.

Date Rating Distance Fatalities
Jun 29, 1993 EF3 59 km 0
May 11, 1991 EF3 87 km 0
Jun 25, 1975 EF3 44 km 0
Jul 18, 1965 EF3 98 km 0
Jul 12, 1965 EF3 45 km 0
Jul 6, 2020 EF2 50 km 0
Jul 6, 2020 EF2 50 km 0
Jun 13, 2016 EF2 76 km 0
Jun 22, 2012 EF2 88 km 0
Jul 13, 2009 EF2 84 km 0
Jul 12, 1993 EF2 80 km 0
May 11, 1991 EF2 86 km 0
May 6, 1988 EF2 99 km 0
May 10, 1985 EF2 39 km 0
May 31, 1984 EF2 78 km 0
Jun 5, 1982 EF2 80 km 0
Jun 5, 1982 EF2 97 km 0
Jul 28, 1978 EF2 99 km 0
Jun 28, 1972 EF2 87 km 0
Jul 23, 1969 EF2 65 km 0
Source: NOAA SPC (EF0+, 1950–2024)

Wildfire History

20 wildfires (100+ acres) within 100 km. Largest: JASPER (82,298 ac, 2000).

Year Name Acres Distance
2000 JASPER 82,298 26 km
2012 OIL CREEK 63,182 18 km
2017 LEGION LAKE 54,868 68 km
1985 FLINT HILLS 21,062 71 km
2024 WILDCAT CREEK 18,751 80 km
2003 RED POINT 18,057 27 km
1988 GALENA 16,936 64 km
2006 THORN DIVIDE COMPLEX 15,261 87 km
2002 BATTLE CREEK 15,034 68 km
1990 SWEDLUND 14,673 58 km
2016 INDIAN CANYON 13,791 75 km
2001 ELK MOUNTAIN 2 13,758 16 km
2001 ROGERS SHACK 11,794 35 km
2002 GRIZZLY GULCH 11,487 68 km
2001 WEST HELL CANYON 11,097 69 km
2007 ALABAUGH 10,650 74 km
2011 THOMPSON 10,519 85 km
2012 WHITE DRAW 9,297 59 km
1988 ROCHELLE HILLS 2 8,718 78 km
1985 SEVEN SISTERS 8,465 79 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 24°F (-4°C) 0.5 in Driest
February 27°F (-3°C) 0.6 in
March 34°F (1°C) 0.8 in
April 43°F (6°C) 1.7 in
May 53°F (12°C) 2.7 in Wettest
June 63°F (17°C) 2.7 in
July 73°F (23°C) 2.1 in Warmest
August 69°F (21°C) 1.7 in
September 59°F (15°C) 1.3 in
October 46°F (8°C) 1.2 in
November 32°F (0°C) 0.7 in
December 24°F (-5°C) 0.6 in Coldest

Newcastle has a seasonal temperature swing of 50°F / from 24°F in December to 73°F in July. Total annual precipitation is 16.6 inches, with May being the wettest month (2.7") and January the driest (0.5").

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