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Weather & Climate in Sun Valley, AZ
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sun Valley enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 37°F in January while summers reach 78°F in July. The area gets 330 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 8.1 inches (drier than the 38-inch national average). The area receives 3.3 inches of snow annually. Air quality is rated Good with a median AQI of 45. The city sits at an elevation of 5,302 feet.
Temperature
37°F Jan (3°C)
78°F Jul (26°C)
| Annual Average | 56.6°F |
| 5% above US avg | |
| January Average | 37°F (3°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 5,302 ft (1,616 m) |
| Area | 31.6 sq mi (81.9 km²) |
| Population Density | 2/sq mi |
| Coordinates | 34.9829°N, 110.0320°W |
| Timezone | America/Phoenix |
| County | Navajo County County |
| Nearest Airport | Winslow-Lindbergh Regional (INW) 39 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 88.1 / 100 |
| Social Vulnerability | 97.7 / 100 |
| Community Resilience | 3.6 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | No Rating |
| Earthquake | Relatively Low |
| Wildfire | Relatively High |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very High |
| Lightning | Very High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
28 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.1.
| Mar 2, 2005 | 40 km SSW of Winslow West, Arizona | M5.1 | 91 km | 5 km |
| Jan 30, 2005 | 41 km NNE of Washington Park, Arizona | M4.0 | 99 km | 5 km |
| Jan 6, 1998 | 15 km WSW of Joseph City, Arizona | M3.9 | 43 km | 5 km |
| Jan 28, 2005 | 40 km NE of Washington Park, Arizona | M3.8 | 93 km | 5 km |
| Feb 8, 2005 | 37 km NE of Washington Park, Arizona | M3.6 | 95 km | 5 km |
| Jul 1, 2005 | 23 km NE of Washington Park, Arizona | M3.4 | 107 km | 5 km |
| Apr 7, 2021 | 4 km ESE of Flagstaff, Arizona | M3.3 | 145 km | 5 km |
| Mar 18, 2025 | 13 km NNE of Clay Springs, Arizona | M3.2 | 60 km | 5 km |
| Jan 8, 2012 | 28 km SW of Winslow West, Arizona | M3.2 | 85 km | 5 km |
| Jul 1, 2005 | 37 km NE of Washington Park, Arizona | M3.2 | 94 km | 5 km |
| Sep 23, 2019 | 22 km NNW of Saint Johns, Arizona | M3.1 | 63 km | 5 km |
| Feb 19, 2025 | 0 km SW of Christopher Creek, Arizona | M3.0 | 117 km | 11 km |
| Jun 18, 2022 | 4 km SW of Clay Springs, Arizona | M3.0 | 77 km | 10 km |
| Feb 8, 2005 | 41 km NE of Washington Park, Arizona | M2.9 | 92 km | 5 km |
| Jul 4, 2021 | 28 km NE of Washington Park, Arizona | M2.8 | 103 km | 5 km |
| Sep 23, 2013 | 7 km WSW of Pinedale, Arizona | M2.8 | 82 km | 5 km |
| Apr 21, 2005 | 36 km SSW of Winslow West, Arizona | M2.8 | 85 km | 5 km |
| Dec 6, 1999 | 18 km ESE of Mountainaire, Arizona | M2.7 | 131 km | 5 km |
| Sep 9, 2022 | 10 km ESE of Flagstaff, Arizona | M2.7 | 139 km | 5 km |
| Mar 18, 2010 | 8 km NNE of Munds Park, Arizona | M2.7 | 144 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
35 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1.
| Date | Rating | Distance | Path | Fatalities |
| Oct 17, 1962 | EF1 | 83 km | 2.0 mi | 0 |
| Jul 26, 2024 | EF0 | 65 km | 1.0 mi | 0 |
| Jun 7, 2024 | EF0 | 23 km | 1.0 mi | 0 |
| Sep 13, 2022 | EF0 | 27 km | 0.1 mi | 0 |
| Jun 17, 2021 | EF0 | 78 km | 0.1 mi | 0 |
| Jun 16, 2021 | EF0 | 71 km | 0.1 mi | 0 |
| Oct 21, 2018 | EF0 | 86 km | 1.7 mi | 0 |
| Oct 20, 2015 | EF0 | 78 km | 6.9 mi | 0 |
| Jul 15, 2013 | EF0 | 60 km | 0.1 mi | 0 |
| Sep 1, 2011 | EF0 | 15 km | 1.2 mi | 0 |
| Jul 24, 2011 | EF0 | 52 km | 1.0 mi | 0 |
| May 22, 2009 | EF0 | 25 km | 1.0 mi | 0 |
| Mar 19, 2006 | EF0 | 92 km | 0.1 mi | 0 |
| Jul 25, 2005 | EF0 | 46 km | 1.0 mi | 0 |
| Jul 16, 2005 | EF0 | 81 km | 1.0 mi | 0 |
| Jul 16, 2005 | EF0 | 69 km | 1.0 mi | 0 |
| Jun 23, 2005 | EF0 | 24 km | 1.0 mi | 0 |
| Sep 29, 2004 | EF0 | 36 km | 3.0 mi | 0 |
| Oct 3, 2003 | EF0 | 69 km | 0.1 mi | 0 |
| Sep 9, 2003 | EF0 | 69 km | 1.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Red Hill (137 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Red Hill | Volcanic field | 2,300 m (7,546 ft) | -9450 | 137 km |
| San Francisco Volcanic Field | Pyroclastic cone | 3,850 m (12,631 ft) | 1075 | 155 km |
| Zuni-Bandera | Volcanic field | 2,550 m (8,366 ft) | -1170 | 186 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: RODEO (461,774 acres, 2002).
| Year | Name | Acres Burned | Distance |
| 2002 | RODEO | 461,774 | 92 km |
| 2009 | CHEVLON COMPLEX (WEIMER) | 12,001 | 86 km |
| 2021 | WYRICK | 7,452 | 77 km |
| 2014 | SAN JUAN | 7,350 | 97 km |
| 2006 | UNNAMED | 5,953 | 79 km |
| 2011 | BIG HOLLOW | 5,768 | 95 km |
| 2021 | OUTLAW | 5,737 | 85 km |
| 1995 | RX | 5,426 | 91 km |
| 1999 | DEER SPRIN | 5,037 | 87 km |
| 2018 | HUB POINT | 4,674 | 85 km |
| 2010 | CIRCLE BAR | 4,599 | 95 km |
| 1999 | HOPCOT | 4,580 | 81 km |
| 2018 | 377 | 4,305 | 65 km |
| 2009 | 55 | 4,283 | 98 km |
| 1996 | WHITESPRG | 4,160 | 96 km |
| 2018 | RANCH | 4,058 | 86 km |
| 2023 | LABOR | 4,025 | 98 km |
| 1996 | RX | 3,797 | 96 km |
| 2001 | HOP-COT | 3,742 | 91 km |
| 2021 | HO WUI | 3,549 | 85 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 37°F (3°C) | 0.6 in | |
| February | 40°F (5°C) | 0.6 in | |
| March | 46°F (8°C) | 0.7 in | |
| April | 53°F (12°C) | 0.4 in | |
| May | 62°F (16°C) | 0.4 in | |
| June | 71°F (22°C) | 0.2 in | Driest |
| July | 78°F (26°C) | 1.3 in | Warmest |
| August | 75°F (24°C) | 1.6 in | Wettest |
| September | 68°F (20°C) | 1.2 in | |
| October | 56°F (13°C) | 1.0 in | |
| November | 44°F (7°C) | 0.6 in | |
| December | 35°F (2°C) | 0.6 in | Coldest |
Sun Valley has a seasonal temperature swing of 44°F / from 35°F in December to 78°F in July. Total annual precipitation is 9.0 inches, with August being the wettest month (1.6") and June the driest (0.2").