All Countries
Weather & Climate in Winchester, ID
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Winchester has a cool climate with an average annual temperature of 45°F (7°C). Winters average 30°F in January while summers reach 64°F in July. The area gets 276 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 21.8 inches (drier than the 38-inch national average). The area receives 86.5 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 33. The city sits at an elevation of 3,977 feet.
Temperature
30°F Jan (-1°C)
64°F Jul (18°C)
| Annual Average | 44.6°F |
| 17% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 3,977 ft (1,212 m) |
| Area | 0.2 sq mi (0.4 km²) |
| Population Density | 1,667/sq mi |
| Coordinates | 46.2408°N, 116.6241°W |
| Timezone | America/Boise |
| County | Nez Perce County County |
| Nearest Airport | Pullman/Moscow Regional (PUW) 42 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 33.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 33.0 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 55.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
83 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.
| Nov 28, 1991 | 7 km S of Walla Walla East, Washington | M4.3 | 133 km | 9 km |
| Jul 14, 1992 | 6 km S of Walla Walla East, Washington | M4.1 | 133 km | 11 km |
| Nov 8, 1997 | 39 km SE of Pierce, Idaho | M3.8 | 93 km | 5 km |
| Jun 28, 1998 | 3 km SE of Genesee, Idaho | M3.8 | 39 km | 10 km |
| May 30, 1996 | 3 km SSW of Mullan, Idaho | M3.6 | 147 km | 1 km |
| Dec 24, 1999 | 18 km WNW of New Meadows, Idaho | M3.5 | 132 km | 3 km |
| Jun 17, 2004 | 11 km SSE of Washtucna, Washington | M3.4 | 133 km | 17 km |
| Mar 8, 1994 | 32 km S of Wallace, Idaho | M3.4 | 118 km | 5 km |
| Dec 15, 1991 | 6 km SSW of Walla Walla East, Washington | M3.3 | 134 km | 8 km |
| Nov 23, 2001 | 6 km WNW of New Meadows, Idaho | M3.2 | 141 km | 0 km |
| Feb 10, 2013 | 29 km ESE of Pierce, Idaho | M3.2 | 90 km | 5 km |
| Jan 26, 1992 | 28 km ENE of Halfway, Oregon | M3.2 | 137 km | 5 km |
| Feb 9, 1996 | 2 km W of Mullan, Idaho | M3.2 | 149 km | 1 km |
| Aug 14, 2017 | 19 km NNW of Halfway, Oregon | M3.1 | 141 km | 8 km |
| Jul 21, 1998 | 6 km N of Halfway, Oregon | M3.1 | 150 km | -1 km |
| Mar 12, 1999 | 17 km NW of Malden, Washington | M3.1 | 144 km | 5 km |
| May 6, 2004 | 0 km W of Mullan, Idaho | M3.1 | 150 km | 2 km |
| Mar 18, 1993 | 3 km SSW of Osburn, Idaho | M3.1 | 145 km | 10 km |
| May 23, 1999 | 19 km NE of Halfway, Oregon | M3.0 | 140 km | 5 km |
| Jul 20, 1998 | 6 km N of Halfway, Oregon | M3.0 | 150 km | -1 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
17 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.
| Date | Rating | Distance | Path | Fatalities |
| Aug 30, 1971 | EF2 | 94 km | 0.5 mi | 0 |
| Jun 11, 1968 | EF2 | 71 km | 9.6 mi | 0 |
| Mar 14, 1966 | EF2 | 95 km | 1.0 mi | 0 |
| May 8, 1962 | EF2 | 22 km | 9.1 mi | 0 |
| May 19, 1986 | EF1 | 57 km | 2.0 mi | 0 |
| May 2, 1973 | EF1 | 62 km | 0.1 mi | 0 |
| Jun 20, 1969 | EF1 | 32 km | 1.0 mi | 0 |
| Jul 12, 2016 | EF0 | 88 km | 1.0 mi | 0 |
| May 9, 2013 | EF0 | 99 km | 0.1 mi | 0 |
| Oct 7, 2010 | EF0 | 20 km | 1.0 mi | 0 |
| Oct 7, 2010 | EF0 | 21 km | 0.4 mi | 0 |
| Jun 29, 2007 | EF0 | 59 km | 0.3 mi | 0 |
| May 31, 1997 | EF0 | 33 km | 0.1 mi | 0 |
| Jun 1, 1991 | EF0 | 39 km | 0.1 mi | 0 |
| May 1, 1991 | EF0 | 41 km | 0.1 mi | 0 |
| Sep 14, 1986 | EF0 | 99 km | 0.2 mi | 0 |
| Apr 11, 1979 | EF0 | 52 km | 1.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: DOUBLE CREEK (171,012 acres, 2022).
| Year | Name | Acres Burned | Distance |
| 2022 | DOUBLE CREEK | 171,012 | 81 km |
| 2000 | MALONEY CREEK | 131,397 | 36 km |
| 2006 | COLUMBIA COMPLEX | 118,865 | 91 km |
| 2021 | SHOVEL CREEK | 109,829 | 28 km |
| 2021 | LICK CREEK | 80,376 | 61 km |
| 2015 | BUTTE CREEK | 79,418 | 80 km |
| 2007 | BATTLE CREEK COMPLEX (BATTLE CREEK) | 79,114 | 92 km |
| 2012 | CACHE CREEK | 75,521 | 43 km |
| 2014 | BIG COUGAR | 65,397 | 32 km |
| 2007 | POE CABIN | 59,704 | 70 km |
| 1988 | TEEPEE BUTTE | 59,565 | 48 km |
| 2005 | SCHOOL | 51,701 | 76 km |
| 2012 | SHEEP | 50,769 | 82 km |
| 2007 | CHIMNEY COMPLEX | 50,646 | 29 km |
| 1996 | SALT COMPLEX (SALT CREEK) | 50,250 | 76 km |
| 2015 | KAMIAH GULCH | 48,459 | 45 km |
| 2017 | POWERLINE | 45,449 | 33 km |
| 2021 | GREEN RIDGE | 44,604 | 79 km |
| 2005 | GRANITE COMPLEX | 37,332 | 94 km |
| 1986 | JOSEPH/STARVATION | 37,064 | 64 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 2.6 in | |
| February | 31°F (-1°C) | 1.9 in | |
| March | 36°F (2°C) | 2.3 in | |
| April | 42°F (5°C) | 2.3 in | |
| May | 49°F (9°C) | 2.7 in | Wettest |
| June | 55°F (13°C) | 2.3 in | |
| July | 64°F (18°C) | 1.0 in | Warmest, Driest |
| August | 63°F (17°C) | 1.3 in | |
| September | 55°F (13°C) | 1.5 in | |
| October | 45°F (7°C) | 1.9 in | |
| November | 34°F (1°C) | 2.5 in | |
| December | 27°F (-3°C) | 2.4 in | Coldest |
Winchester has a seasonal temperature swing of 37°F / from 27°F in December to 64°F in July. Total annual precipitation is 24.6 inches, with May being the wettest month (2.7") and July the driest (1.0").