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Weather & Climate in Washam, WY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Washam has a cool climate with an average annual temperature of 44°F (7°C). Winters average 21°F in January while summers reach 69°F in July. The area gets 322 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 7.8 inches (drier than the 38-inch national average). The area receives 29.7 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 6,668 feet.
Temperature
21°F Jan (-6°C)
69°F Jul (20°C)
| Annual Average | 43.9°F |
| 19% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 69°F (20°C) |
| Sunny Days | 322 days/yr |
Geography
| Elevation | 6,668 ft (2,032 m) |
| Area | 3.1 sq mi (8.1 km²) |
| Population Density | 59/sq mi |
| Coordinates | 41.0056°N, 109.6991°W |
| Timezone | America/Denver |
| County | Daggett County County |
| Nearest Airport | Vernal Regional (VEL) 41 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 3.7 / 100 |
| Social Vulnerability | 50.6 / 100 |
| Community Resilience | 96.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | No Rating |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
113 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.9.
| Apr 15, 2010 | 9 km NE of Randolph, Utah | M4.9 | 141 km | 10 km |
| Mar 20, 1995 | 10 km NNW of Rangely, Colorado | M4.5 | 117 km | -3 km |
| Jan 30, 2000 | 8 km ESE of Little America, Wyoming | M4.3 | 56 km | 5 km |
| May 20, 1995 | 434km E of Wendover, Utah | M4.1 | 110 km | 4 km |
| May 25, 2016 | 15 km NNE of Tabiona, Utah | M4.0 | 99 km | 16 km |
| Apr 7, 1990 | 28 km WNW of Bonanza, Utah | M4.0 | 103 km | 11 km |
| Apr 22, 2017 | 4 km NW of Rangely, Colorado | M3.8 | 123 km | 7 km |
| Nov 8, 1991 | 17 km WNW of Bonanza, Utah | M3.7 | 104 km | 4 km |
| Mar 2, 1991 | 27 km SSW of Jensen, Utah | M3.7 | 98 km | -3 km |
| Jun 9, 2021 | 17 km E of Independence, Utah | M3.7 | 138 km | 10 km |
| Nov 11, 2000 | 14 km SE of Jensen, Utah | M3.6 | 91 km | -3 km |
| Jun 30, 1998 | 8 km NNW of Point of Rocks, Wyoming | M3.6 | 110 km | 6 km |
| Jun 25, 1994 | 12 km NE of Little America, Wyoming | M3.6 | 67 km | -3 km |
| Mar 7, 2009 | 9 km NNE of Granger, Wyoming | M3.5 | 76 km | 1 km |
| Jul 2, 2016 | 7 km NNE of Granger, Wyoming | M3.5 | 75 km | -3 km |
| May 13, 1993 | 10 km NW of Rangely, Colorado | M3.5 | 117 km | -3 km |
| Dec 10, 1999 | 11 km NE of Dinosaur, Colorado | M3.5 | 103 km | 8 km |
| Feb 9, 2015 | 11 km NNE of Granger, Wyoming | M3.5 | 77 km | -2 km |
| Apr 23, 2025 | 2 km NNW of Little America, Wyoming | M3.5 | 63 km | -2 km |
| Aug 10, 2025 | 3 km NNW of Little America, Wyoming | M3.5 | 65 km | -2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
24 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| May 10, 1950 | EF2 | 63 km | 2.0 mi | 0 |
| Jul 10, 2001 | EF1 | 92 km | 5.0 mi | 0 |
| Apr 20, 2001 | EF1 | 58 km | 0.2 mi | 0 |
| Apr 14, 2000 | EF1 | 58 km | 0.5 mi | 0 |
| Sep 3, 1999 | EF1 | 69 km | 4.0 mi | 0 |
| Jul 31, 1978 | EF1 | 80 km | 1.0 mi | 0 |
| Jun 27, 1974 | EF1 | 61 km | 0.1 mi | 0 |
| Sep 9, 1973 | EF1 | 68 km | 0.1 mi | 0 |
| Jun 1, 1955 | EF1 | 61 km | 0.1 mi | 0 |
| May 28, 2018 | EF0 | 69 km | 3.5 mi | 0 |
| Jun 16, 2015 | EF0 | 38 km | 1.0 mi | 0 |
| Sep 15, 2013 | EF0 | 96 km | 0.1 mi | 0 |
| Aug 6, 2009 | EF0 | 63 km | 0.5 mi | 0 |
| Aug 6, 2009 | EF0 | 91 km | 2.2 mi | 0 |
| Aug 21, 2001 | EF0 | 16 km | 2.0 mi | 0 |
| May 5, 1999 | EF0 | 45 km | 1.0 mi | 0 |
| Jun 10, 1997 | EF0 | 54 km | 0.1 mi | 0 |
| Jul 8, 1990 | EF0 | 86 km | 0.2 mi | 0 |
| Mar 23, 1990 | EF0 | 67 km | 0.2 mi | 0 |
| May 30, 1989 | EF0 | 63 km | 0.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: EAST FORK (106,432 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | EAST FORK | 106,432 | 88 km |
| 2007 | NEOLA NORTH | 46,909 | 56 km |
| 2000 | WLD HORSE | 41,881 | 40 km |
| 2000 | SHEEP MT | 31,393 | 47 km |
| 2002 | MUSTANG | 20,607 | 30 km |
| 1988 | WHITEROCKS | 18,885 | 55 km |
| 2002 | GARDEN VALLEY COMPLEX (EAST FORK) | 14,245 | 88 km |
| 2017 | PEEKABOO | 11,985 | 79 km |
| 2018 | LANEY RIM | 11,589 | 65 km |
| 2000 | BUSTERFLAT | 8,501 | 73 km |
| 2020 | RICHARD MTN | 7,802 | 37 km |
| 2010 | WINDMILL | 5,935 | 96 km |
| 1989 | UINTA CANYON | 5,834 | 54 km |
| 1988 | ZENOBIA | 5,468 | 80 km |
| 1997 | RED CREEK | 5,381 | 55 km |
| 1988 | LITTLEBRYN | 5,300 | 98 km |
| 2005 | NORTH NEOLA | 5,195 | 64 km |
| 1985 | WEYMAN | 5,058 | 19 km |
| 1996 | L.D.FALLS | 4,697 | 79 km |
| 2006 | SALT WELLS BASIN | 4,581 | 54 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 0.4 in | Coldest, Driest |
| February | 24°F (-4°C) | 0.4 in | |
| March | 32°F (0°C) | 0.6 in | |
| April | 40°F (5°C) | 1.1 in | |
| May | 49°F (10°C) | 1.3 in | Wettest |
| June | 59°F (15°C) | 1.1 in | |
| July | 69°F (20°C) | 0.9 in | Warmest |
| August | 65°F (18°C) | 0.9 in | |
| September | 56°F (13°C) | 0.9 in | |
| October | 44°F (7°C) | 0.9 in | |
| November | 30°F (-1°C) | 0.6 in | |
| December | 22°F (-6°C) | 0.5 in |
Washam has a seasonal temperature swing of 48°F / from 21°F in January to 69°F in July. Total annual precipitation is 9.5 inches, with May being the wettest month (1.3") and January the driest (0.4").