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Weather & Climate in Riverside, WY
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Riverside has a cool climate with an average annual temperature of 44°F (7°C). Winters average 24°F in January while summers reach 67°F in July. The area gets 282 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 7,185 feet.
Temperature
24°F Jan (-5°C)
67°F Jul (19°C)
| Annual Average | 43.7°F |
| 19% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 282 days/yr |
Geography
| Elevation | 7,185 ft (2,190 m) |
| Area | 0.3 sq mi (0.7 km²) |
| Population Density | 104/sq mi |
| Coordinates | 41.2154°N, 106.7813°W |
| Timezone | America/Denver |
| County | Carbon County County |
| Nearest Airport | Laramie Regional (LAR) 56 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 42.7 / 100 |
| Social Vulnerability | 47.8 / 100 |
| Community Resilience | 25.6 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | No Rating |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
58 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.
| Apr 6, 1999 | 31 km SE of Wamsutter, Wyoming | M4.3 | 84 km | 10 km |
| Jan 31, 2002 | 28 km SSW of Craig, Colorado | M4.3 | 129 km | 5 km |
| May 26, 2000 | 5 km S of Bairoil, Wyoming | M4.0 | 127 km | 5 km |
| Mar 19, 2022 | 5 km NW of Ryan Park, Wyoming | M3.8 | 24 km | 11 km |
| Aug 18, 2009 | 19 km N of Craig, Colorado | M3.7 | 89 km | 5 km |
| Jun 1, 1993 | 6 km N of Bairoil, Wyoming | M3.7 | 138 km | 5 km |
| Jun 2, 2023 | 9 km SSE of Saratoga, Wyoming | M3.6 | 18 km | 1 km |
| Aug 6, 1998 | 18 km NNE of Rawlins, Wyoming | M3.6 | 89 km | 10 km |
| Jun 6, 2011 | 17 km NNW of Oak Creek, Colorado | M3.5 | 91 km | 5 km |
| Aug 13, 2004 | 35 km SW of Alcova, Wyoming | M3.5 | 121 km | 5 km |
| Apr 20, 2017 | 24 km NE of Maybell, Colorado | M3.5 | 110 km | 13 km |
| Sep 14, 2024 | 9 km SSE of Saratoga, Wyoming | M3.4 | 19 km | 10 km |
| Apr 10, 2011 | 12 km N of Oak Creek, Colorado | M3.4 | 93 km | 5 km |
| Oct 8, 2009 | 31 km SSW of Alcova, Wyoming | M3.4 | 121 km | 5 km |
| Jan 19, 2022 | 8 km ESE of Saratoga, Wyoming | M3.3 | 24 km | 5 km |
| May 4, 2015 | 5 km SSW of Encampment, Wyoming | M3.3 | 6 km | 5 km |
| Jun 3, 2023 | 8 km SSE of Saratoga, Wyoming | M3.3 | 19 km | 12 km |
| Aug 26, 2022 | 27 km E of Bairoil, Wyoming | M3.3 | 119 km | 5 km |
| Mar 29, 2022 | 10 km NNW of Ryan Park, Wyoming | M3.3 | 27 km | 5 km |
| Jul 3, 2009 | 22 km SW of Rawlins, Wyoming | M3.2 | 68 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
36 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| Jun 6, 2018 | EF3 | 97 km | 11.3 mi | 0 |
| Jul 2, 1976 | EF2 | 41 km | 2.5 mi | 0 |
| Jun 6, 2020 | EF1 | 42 km | 1.2 mi | 0 |
| Jul 6, 2019 | EF1 | 95 km | 4.0 mi | 0 |
| Aug 26, 2004 | EF1 | 63 km | 1.5 mi | 0 |
| May 30, 1980 | EF1 | 69 km | 0.5 mi | 0 |
| Jun 5, 1977 | EF1 | 94 km | 0.1 mi | 0 |
| Aug 9, 1974 | EF1 | 80 km | 0.1 mi | 0 |
| Aug 9, 1974 | EF1 | 57 km | 0.1 mi | 0 |
| Jul 15, 1967 | EF1 | 7 km | 1.3 mi | 0 |
| Jun 15, 1966 | EF1 | 24 km | 7.7 mi | 0 |
| May 29, 1964 | EF1 | 94 km | 0.5 mi | 0 |
| Jul 3, 1960 | EF1 | 48 km | 1.5 mi | 0 |
| Aug 7, 1954 | EF1 | 98 km | 2.0 mi | 0 |
| Jul 16, 1953 | EF1 | 46 km | 0.1 mi | 0 |
| Jun 24, 2018 | EF0 | 64 km | 0.4 mi | 0 |
| Jun 24, 2018 | EF0 | 79 km | 0.0 mi | 0 |
| May 28, 2018 | EF0 | 94 km | 0.1 mi | 0 |
| Jun 15, 2015 | EF0 | 98 km | 1.0 mi | 0 |
| May 23, 2015 | EF0 | 86 km | 0.3 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: MULLEN (179,894 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | MULLEN | 179,894 | 46 km |
| 2016 | BEAVER CREEK | 44,221 | 37 km |
| 2018 | RYAN | 28,858 | 24 km |
| 2020 | MIDDLE FORK | 20,886 | 64 km |
| 2018 | BADGER CREEK | 20,752 | 59 km |
| 2018 | DIVIDE | 20,540 | 97 km |
| 2002 | MT. ZIRKEL COMPLEX (HINMAN) | 17,627 | 45 km |
| 2002 | MT. ZIRKEL COMPLEX (BURN RIDGE) | 15,478 | 57 km |
| 2020 | RR 316 | 14,274 | 71 km |
| 2012 | SQUIRREL CREEK | 10,768 | 61 km |
| 2023 | IRON | 7,783 | 96 km |
| 2021 | MORGAN CREEK | 7,710 | 54 km |
| 1999 | JEP | 4,647 | 69 km |
| 2017 | DEEP CREEK | 4,019 | 74 km |
| 2004 | PENNOCK RX | 3,593 | 31 km |
| 2006 | DIVIDE | 3,332 | 89 km |
| 1993 | DUNES | 3,161 | 69 km |
| 2017 | BIG RED | 2,868 | 33 km |
| 2017 | KEYSTONE | 2,784 | 42 km |
| 2007 | MUD SPRINGS | 2,613 | 76 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 0.7 in | Driest |
| February | 24°F (-4°C) | 0.8 in | |
| March | 31°F (-1°C) | 1.0 in | |
| April | 38°F (3°C) | 1.4 in | |
| May | 47°F (8°C) | 1.6 in | Wettest |
| June | 56°F (14°C) | 1.3 in | |
| July | 67°F (19°C) | 1.3 in | Warmest |
| August | 61°F (16°C) | 1.3 in | |
| September | 53°F (12°C) | 1.3 in | |
| October | 43°F (6°C) | 1.3 in | |
| November | 30°F (-1°C) | 1.0 in | |
| December | 23°F (-5°C) | 0.9 in | Coldest |
Riverside has a seasonal temperature swing of 44°F / from 23°F in December to 67°F in July. Total annual precipitation is 13.9 inches, with May being the wettest month (1.6") and January the driest (0.7").