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Weather & Climate in Santa Rosa, AZ
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Santa Rosa enjoys a temperate climate with an average annual temperature of 69°F (21°C). Winters average 49°F in January while summers reach 90°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 8.0 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 45. The city sits at an elevation of 1,813 feet.
Temperature
49°F Jan (10°C)
90°F Jul (32°C)
| Annual Average | 68.9°F |
| 28% above US avg | |
| January Average | 49°F (10°C) |
| July Average | 90°F (32°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 1,813 ft (553 m) |
| Area | 6.5 sq mi (16.9 km²) |
| Population Density | 106/sq mi |
| Coordinates | 32.3325°N, 112.0463°W |
| Timezone | America/Phoenix |
| County | Pima County County |
| Nearest Airport | Marana Regional (AVW) 49 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 99.1 / 100 |
| Social Vulnerability | 50.9 / 100 |
| Community Resilience | 20.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively High |
| Flood | Very High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very High |
| Winter Weather | Relatively Moderate |
| Lightning | Very High |
| Drought | Relatively Moderate |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
4 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| Aug 8, 2000 | 39 km S of Dateland, Arizona | M3.5 | 135 km | 5 km |
| Sep 28, 2023 | 21 km E of Tanque Verde, Arizona | M3.1 | 145 km | 12 km |
| Mar 31, 1996 | 147km ESE of Fortuna Foothills, Arizona | M3.0 | 99 km | 6 km |
| Aug 9, 2025 | 14 km ENE of Willow Canyon, Arizona | M2.6 | 141 km | 12 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
38 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 3 fatalities, 64 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 28, 1994 | EF2 | 97 km | 2.0 mi | 0 |
| Aug 27, 1964 | EF2 | 98 km | 0.1 mi | 2 |
| Jan 18, 1993 | EF1 | 96 km | 2.0 mi | 0 |
| Aug 24, 1991 | EF1 | 74 km | 1.0 mi | 0 |
| Jul 20, 1988 | EF1 | 76 km | 0.5 mi | 0 |
| Mar 15, 1985 | EF1 | 86 km | 0.1 mi | 0 |
| Jul 22, 1984 | EF1 | 80 km | 1.0 mi | 0 |
| Jul 16, 1984 | EF1 | 90 km | 0.1 mi | 0 |
| Sep 5, 1981 | EF1 | 93 km | 1.0 mi | 0 |
| Sep 5, 1981 | EF1 | 42 km | 2.0 mi | 0 |
| Dec 23, 1975 | EF1 | 67 km | 2.0 mi | 0 |
| Jun 23, 1974 | EF1 | 99 km | 1.0 mi | 1 |
| Jun 21, 1972 | EF1 | 77 km | 6.4 mi | 0 |
| Jun 21, 1972 | EF1 | 66 km | 1.0 mi | 0 |
| Sep 1, 1971 | EF1 | 81 km | 32.4 mi | 0 |
| Jul 16, 1967 | EF1 | 52 km | 1.0 mi | 0 |
| Jul 22, 1961 | EF1 | 41 km | 0.1 mi | 0 |
| Sep 8, 1960 | EF1 | 64 km | 0.1 mi | 0 |
| Aug 13, 2023 | EF0 | 65 km | 0.1 mi | 0 |
| Oct 16, 2022 | EF0 | 98 km | 0.3 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
1 volcano within 200 km. Closest: Pinacate (150 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Pinacate | Pyroclastic cone(s) | 1,200 m (3,937 ft) | Unknown | 150 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: GOLDWATER (56,690 acres, 2005).
| Year | Name | Acres Burned | Distance |
| 2005 | GOLDWATER | 56,690 | 90 km |
| 2022 | CONTRERAS | 31,297 | 63 km |
| 2009 | ELK HORN | 22,745 | 78 km |
| 2016 | BROWN | 15,681 | 78 km |
| 2020 | ENCINOS | 14,145 | 85 km |
| 2005 | UNNAMED | 9,537 | 83 km |
| 1985 | UNNAMED | 8,047 | 87 km |
| 2005 | VEKOL | 7,349 | 64 km |
| 2007 | ALAMBRE | 7,221 | 66 km |
| 2009 | SAN JUAN | 6,710 | 56 km |
| 2006 | CITY HALL | 6,639 | 84 km |
| 1985 | SAN IGNACI | 6,377 | 52 km |
| 2001 | BLANCO | 5,803 | 88 km |
| 2000 | CITYHALL2 | 5,732 | 85 km |
| 2009 | THREE PEAKS | 5,706 | 82 km |
| 2005 | TRACKS | 5,641 | 80 km |
| 1991 | CITY HALL | 5,590 | 85 km |
| 2002 | CITY HALL | 5,436 | 85 km |
| 1984 | CHANDLER | 5,359 | 93 km |
| 1997 | UNNAMED | 5,041 | 94 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 49°F (10°C) | 0.8 in | Coldest |
| February | 55°F (13°C) | 0.7 in | |
| March | 59°F (15°C) | 0.8 in | |
| April | 65°F (18°C) | 0.3 in | |
| May | 74°F (23°C) | 0.2 in | Driest |
| June | 83°F (28°C) | 0.2 in | |
| July | 90°F (32°C) | 1.7 in | Warmest |
| August | 86°F (30°C) | 2.0 in | Wettest |
| September | 81°F (27°C) | 1.1 in | |
| October | 70°F (21°C) | 0.9 in | |
| November | 59°F (15°C) | 0.7 in | |
| December | 51°F (10°C) | 1.3 in |
Santa Rosa has a seasonal temperature swing of 40°F / from 49°F in January to 90°F in July. Total annual precipitation is 10.5 inches, with August being the wettest month (2.0") and May the driest (0.2").