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Weather & Climate in Nyssa, OR

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

Nyssa experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 30°F in January while summers reach 77°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 10.2 inches (drier than the 38-inch national average). The area receives 8.3 inches of snow annually. Air quality is rated Good with a median AQI of 32. The city sits at an elevation of 2,180 feet.

Temperature

30°F Jan (-1°C) 77°F Jul (25°C)
Annual Average51.8°F
4% below US avg
January Average30°F (-1°C)
July Average77°F (25°C)
Sunny Days302 days/yr

Geography

Elevation2,180 ft (664 m)
Area0.6 sq mi (1.6 km²)
Population Density2,077/sq mi
Coordinates43.8779°N, 116.9956°W
TimezoneAmerica/Los_Angeles
CountyCanyon County County
Nearest AirportBoise Air Trml/Gowen Field (BOI)
44 miles away

Precipitation & Snow

Annual Rainfall 10.2"
73% below US avg
Snowfall 8.3"
Wettest Month (Jan) 1.54"
Driest Month (Jul) 0.31"

Air Quality

AQI Median32.0
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

208 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 91 km 12 km
Oct 27, 1994 11 km SE of Halfway, Oregon M4.0 104 km 10 km
Oct 4, 2002 15 km W of Cascade, Idaho M3.8 93 km 5 km
Mar 12, 2023 11 km S of Donnelly, Idaho M3.7 111 km 12 km
Sep 14, 2000 4 km W of Smiths Ferry, Idaho M3.7 82 km 7 km
Apr 6, 1995 11 km N of Smiths Ferry, Idaho M3.7 92 km 5 km
Apr 7, 2020 southern Idaho M3.6 150 km 10 km
Mar 17, 1995 5 km S of Cascade, Idaho M3.5 100 km 5 km
Dec 24, 1999 18 km WNW of New Meadows, Idaho M3.5 138 km 3 km
Apr 24, 2007 12 km WSW of Cascade, Idaho M3.5 92 km 5 km
Aug 3, 2002 8 km NNW of Smiths Ferry, Idaho M3.5 88 km 5 km
Mar 1, 2024 8 km N of Smiths Ferry, Idaho M3.5 90 km 10 km
Mar 5, 2024 8 km N of Smiths Ferry, Idaho M3.5 92 km 10 km
Apr 6, 2002 9 km NW of Cascade, Idaho M3.5 103 km 5 km
Nov 4, 2002 37 km NE of Mountain Home, Idaho M3.5 137 km 5 km
Mar 12, 2024 8 km NNW of Smiths Ferry, Idaho M3.5 88 km 16 km
Sep 4, 2022 19 km W of Stanley, Idaho M3.4 150 km 10 km
Apr 6, 2024 9 km NNW of Smiths Ferry, Idaho M3.4 89 km 14 km
May 21, 2020 35 km NW of Stanley, Idaho M3.4 149 km 11 km
Oct 4, 2002 20 km WSW of Cascade, Idaho M3.4 86 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: EF1.

Date Rating Distance Path Fatalities
Apr 30, 1997 EF1 18 km 3.0 mi 0
May 17, 1996 EF1 12 km 0.3 mi 0
May 17, 1996 EF1 41 km 5.5 mi 0
Jun 19, 1991 EF1 40 km 0.1 mi 0
Jul 9, 1990 EF1 50 km 0.1 mi 0
Oct 26, 1984 EF1 61 km 0.3 mi 0
Mar 21, 1984 EF1 67 km 0.1 mi 0
Jul 1, 1983 EF1 20 km 2.0 mi 0
Apr 23, 1974 EF1 15 km 1.0 mi 0
Aug 25, 1966 EF1 14 km 19.1 mi 0
Jul 9, 1956 EF1 44 km 0.1 mi 0
May 26, 2023 EF0 46 km 1.0 mi 0
May 27, 2022 EF0 55 km 3.8 mi 0
Aug 25, 2004 EF0 30 km — 0
Aug 25, 2004 EF0 26 km — 0
Apr 6, 2003 EF0 48 km 1.0 mi 0
Sep 29, 2002 EF0 32 km 1.0 mi 0
Feb 7, 2002 EF0 40 km 0.1 mi 0
Sep 13, 2001 EF0 41 km 1.0 mi 0
Dec 15, 2000 EF0 48 km 1.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

2 volcanoes within 200 km. Closest: Jordan Craters (90 km).

Name Type Elevation Last Eruption Distance
Jordan Craters Volcanic field 1,473 m (4,833 ft) -1250 90 km
Diamond Craters Volcanic field 1,435 m (4,708 ft) -5610 166 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 63 km
2024 PADDOCK 186,842 48 km
2024 COW VALLEY 134,642 59 km
2015 CORNET-WINDY RIDGE 102,553 99 km
2020 WOODHEAD 98,995 98 km
2024 HOLE IN THE GROUND 98,055 98 km
2000 JACKSON 80,733 34 km
2006 CHERRY 56,773 54 km
1996 BOGUS CREEK 56,721 96 km
2015 BENDIRE COMPLEX 49,260 78 km
2013 OWYHEE 48,001 31 km
2007 IRISH SPRING 47,845 95 km
2020 INDIAN CREEK 46,275 73 km
2006 STAR MOUNTAIN 45,243 85 km
2002 TRIMBLY CREEK 43,085 46 km
1986 BISSELL CK 40,847 33 km
1994 SWAMP CREEK 40,332 99 km
1986 VAN DUSEN 39,901 48 km
2022 WILLOW CREEK 38,585 39 km
2016 CHERRY ROAD 35,219 40 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 30°F (-1°C) 1.5 in Wettest
February 35°F (2°C) 1.1 in
March 43°F (6°C) 1.1 in
April 50°F (10°C) 0.9 in
May 59°F (15°C) 0.9 in
June 67°F (19°C) 0.9 in
July 77°F (25°C) 0.3 in Warmest, Driest
August 73°F (23°C) 0.4 in
September 63°F (17°C) 0.6 in
October 51°F (11°C) 0.7 in
November 39°F (4°C) 1.4 in
December 29°F (-2°C) 1.5 in Coldest

Nyssa has a seasonal temperature swing of 47°F / from 29°F in December to 77°F in July. Total annual precipitation is 11.6 inches, with January being the wettest month (1.5") and July the driest (0.3").

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