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Weather & Climate in Caldwell, ID

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Caldwell experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 31°F in January while summers reach 75°F in July. The area gets 302 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 11.0 inches (drier than the 38-inch national average). The area receives 9.7 inches of snow annually. Air quality is rated Good with a median AQI of 33. The city sits at an elevation of 2,395 feet.

Temperature

31°F Jan (-0°C) 75°F Jul (24°C)
Annual Average52.0°F
4% below US avg
January Average31°F (-0°C)
July Average75°F (24°C)
Sunny Days302 days/yr

Geography

Elevation2,395 ft (730 m)
Area22.1 sq mi (57.3 km²)
Population Density2,525/sq mi
Coordinates43.6459°N, 116.6593°W
TimezoneAmerica/Boise
CountyCanyon County County
Nearest AirportBoise Air Trml/Gowen Field (BOI)
23 miles away

Precipitation & Snow

Annual Rainfall 11.0"
71% below US avg
Snowfall 9.7"
Wettest Month (Jan) 1.30"
Driest Month (Jul) 0.28"

Air Quality

AQI Median33.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score71.7 / 100
Social Vulnerability18.5 / 100
Community Resilience42.4 / 100

Hazard Breakdown

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

Earthquake History

1,031 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.9.

Feb 26, 2024 10 km N of Smiths Ferry, Idaho M4.9 94 km 12 km
Apr 1, 2020 21 km WNW of Stanley, Idaho M4.8 141 km 10 km
Jun 25, 2020 27 km NW of Stanley, Idaho M4.6 145 km 8 km
May 14, 2020 31 km NW of Stanley, Idaho M4.4 144 km 13 km
May 21, 2020 26 km NW of Stanley, Idaho M4.4 146 km 6 km
Apr 1, 2020 23 km NW of Stanley, Idaho M4.4 142 km 7 km
Jun 14, 2020 10 km NW of Stanley, Idaho M4.2 147 km 8 km
Jun 9, 2020 11 km NW of Stanley, Idaho M4.2 149 km 10 km
Jul 10, 2020 18 km SW of Stanley, Idaho M4.1 136 km 10 km
Apr 21, 2020 29 km NW of Stanley, Idaho M4.1 146 km 10 km
Apr 11, 2020 20 km NW of Stanley, Idaho M4.1 143 km 10 km
Oct 27, 1994 11 km SE of Halfway, Oregon M4.0 133 km 10 km
Apr 1, 2020 18 km NW of Stanley, Idaho M4.0 145 km 14 km
Apr 3, 2020 20 km NW of Stanley, Idaho M4.0 142 km 10 km
Jan 1, 2021 15 km SSW of Stanley, Idaho M3.9 143 km 3 km
Jul 10, 2020 14 km SW of Stanley, Idaho M3.9 139 km 14 km
May 31, 2020 16 km SW of Stanley, Idaho M3.9 136 km 10 km
Jun 6, 2025 17 km NW of Stanley, Idaho M3.9 147 km 13 km
Apr 3, 2020 26 km NW of Stanley, Idaho M3.9 142 km 15 km
Jul 3, 2020 26 km NW of Stanley, Idaho M3.9 145 km 10 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

40 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1. Total: 1 injury.

Date Rating Distance Path Fatalities
Apr 30, 1997 EF1 55 km 3.0 mi 0
May 17, 1996 EF1 36 km 0.3 mi 0
May 17, 1996 EF1 72 km 5.5 mi 0
Jun 19, 1991 EF1 28 km 0.1 mi 0
Jul 9, 1990 EF1 80 km 0.1 mi 0
Oct 26, 1984 EF1 25 km 0.3 mi 0
Mar 21, 1984 EF1 30 km 0.1 mi 0
Jul 1, 1983 EF1 44 km 2.0 mi 0
Apr 23, 1974 EF1 38 km 1.0 mi 0
Jun 23, 1969 EF1 84 km 1.0 mi 0
Aug 25, 1966 EF1 37 km 19.1 mi 0
Jul 9, 1956 EF1 14 km 0.1 mi 0
May 27, 2023 EF0 90 km 5.0 mi 0
May 26, 2023 EF0 17 km 1.0 mi 0
May 27, 2022 EF0 27 km 3.8 mi 0
May 26, 2013 EF0 81 km 3.9 mi 0
Aug 25, 2004 EF0 25 km — 0
Aug 25, 2004 EF0 10 km — 0
Apr 6, 2003 EF0 10 km 1.0 mi 0
Sep 29, 2002 EF0 25 km 1.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

3 volcanoes within 200 km. Closest: Jordan Craters (85 km).

Name Type Elevation Last Eruption Distance
Jordan Craters Volcanic field 1,473 m (4,833 ft) -1250 85 km
Diamond Craters Volcanic field 1,435 m (4,708 ft) -5610 180 km
Black Butte Crater Lava Field Shield 1,478 m (4,849 ft) -8400 193 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: SODA (282,888 acres, 2015).

Year Name Acres Burned Distance
2015 SODA 282,888 40 km
1992 FOOTHILLS 228,631 78 km
2024 PADDOCK 186,842 56 km
2013 PONY COMPLEX 148,188 86 km
2024 COW VALLEY 134,642 97 km
2013 ELK COMPLEX 129,565 97 km
2024 HOLE IN THE GROUND 98,055 93 km
2000 JACKSON 80,733 71 km
2006 CHERRY 56,773 54 km
1996 BOGUS CREEK 56,721 95 km
2006 RATTLESNAKE COMPLEX 48,330 100 km
2013 OWYHEE 48,001 42 km
2006 STAR MOUNTAIN 45,243 97 km
2002 TRIMBLY CREEK 43,085 37 km
1986 BISSELL CK 40,847 39 km
1986 VAN DUSEN 39,901 47 km
2022 WILLOW CREEK 38,585 75 km
2016 CHERRY ROAD 35,219 47 km
2002 MAHOGANY COMPLEX (ATKINS BUTTE) 33,472 55 km
2007 CLARK BUTTE 31,330 93 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 31°F (-0°C) 1.3 in Wettest
February 36°F (2°C) 1.0 in
March 44°F (7°C) 1.2 in
April 51°F (10°C) 1.1 in
May 59°F (15°C) 0.9 in
June 67°F (19°C) 0.8 in
July 75°F (24°C) 0.3 in Warmest, Driest
August 72°F (22°C) 0.4 in
September 62°F (17°C) 0.7 in
October 52°F (11°C) 0.8 in
November 39°F (4°C) 1.3 in
December 31°F (-1°C) 1.2 in Coldest

Caldwell has a seasonal temperature swing of 45°F / from 31°F in December to 75°F in July. Total annual precipitation is 10.9 inches, with January being the wettest month (1.3") and July the driest (0.3").

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