All Countries
Weather & Climate in North San Juan, CA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
North San Juan enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 45°F in January while summers reach 75°F in July. The area gets 293 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 46.3 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 2,142 feet.
Temperature
45°F Jan (7°C)
75°F Jul (24°C)
| Annual Average | 58.7°F |
| 9% above US avg | |
| January Average | 45°F (7°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 2,142 ft (653 m) |
| Area | 2.4 sq mi (6.3 km²) |
| Population Density | 46/sq mi |
| Coordinates | 39.3718°N, 121.1061°W |
| Timezone | America/Los_Angeles |
| County | Yuba County County |
| Nearest Airport | Chico Regional (CIC) 52 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 80.9 / 100 |
| Social Vulnerability | 30.4 / 100 |
| Community Resilience | 36.6 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Drought | Relatively High |
| Cold Wave | No Rating |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2,524 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.1.
| Sep 12, 1994 | 4 km S of Carter Springs, Nevada | M6.1 | 140 km | 14 km |
| May 24, 2013 | 2 km NNE of Canyondam, California | M5.7 | 91 km | 8 km |
| May 11, 2023 | Lake Almanor Earthquake | M5.5 | 93 km | 6 km |
| Aug 10, 2001 | 3 km N of Blairsden, California | M5.2 | 64 km | 5 km |
| May 12, 2023 | 4km NW of Canyondam, CA | M5.2 | 92 km | 6 km |
| Sep 12, 1994 | 8 km ESE of Mesa Vista, California | M5.1 | 138 km | -1 km |
| Apr 26, 2008 | 1 km NW of Mogul, Nevada | M5.1 | 102 km | 3 km |
| Aug 10, 2016 | 20 km NNE of Upper Lake, California | M5.1 | 146 km | 14 km |
| Dec 22, 1995 | California-Nevada border region | M4.9 | 146 km | 4 km |
| May 24, 2013 | 1km NNW of Canyondam, CA | M4.9 | 90 km | 4 km |
| Dec 28, 1995 | 9 km WNW of Topaz Lake, Nevada | M4.8 | 145 km | -1 km |
| Apr 26, 2008 | 0 km N of Mogul, Nevada | M4.8 | 103 km | 3 km |
| Oct 30, 1998 | 4 km N of Tahoe Vista, California | M4.8 | 92 km | 1 km |
| Jun 26, 2005 | 8 km NNW of Tahoe Vista, California | M4.8 | 88 km | -2 km |
| Dec 23, 1995 | 8 km WNW of Topaz Lake, Nevada | M4.7 | 146 km | -1 km |
| May 7, 2021 | 19km NW of Truckee, CA | M4.7 | 69 km | 10 km |
| Nov 15, 1995 | 9 km SW of Cold Springs, Nevada | M4.5 | 94 km | -1 km |
| Sep 20, 1994 | 9 km WNW of Topaz Lake, Nevada | M4.5 | 145 km | -1 km |
| Mar 21, 2020 | 5 km NE of Indian Hills, Nevada | M4.5 | 122 km | 8 km |
| Aug 4, 2016 | 5 km WNW of Patton Village, California | M4.5 | 116 km | 7 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
66 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 6 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 25, 2011 | EF2 | 51 km | 0.2 mi | 0 |
| Feb 10, 1994 | EF2 | 43 km | 0.3 mi | 0 |
| Feb 7, 1978 | EF2 | 80 km | 1.9 mi | 0 |
| Dec 19, 2023 | EF1 | 79 km | 0.4 mi | 0 |
| Aug 15, 2020 | EF1 | 92 km | 0.1 mi | 0 |
| Aug 14, 2020 | EF1 | 93 km | 0.4 mi | 0 |
| Dec 24, 2015 | EF1 | 74 km | 6.2 mi | 0 |
| Mar 26, 2014 | EF1 | 92 km | 0.6 mi | 0 |
| Mar 26, 2014 | EF1 | 88 km | 0.7 mi | 0 |
| Mar 26, 2014 | EF1 | 88 km | 1.0 mi | 0 |
| Oct 22, 2012 | EF1 | 49 km | 0.3 mi | 0 |
| Oct 22, 2012 | EF1 | 36 km | 4.0 mi | 0 |
| Oct 22, 2012 | EF1 | 57 km | 2.0 mi | 0 |
| May 25, 2011 | EF1 | 95 km | 26.4 mi | 0 |
| May 25, 2011 | EF1 | 95 km | 21.7 mi | 0 |
| Jan 8, 2005 | EF1 | 41 km | 0.1 mi | 0 |
| Apr 17, 1993 | EF1 | 90 km | 0.5 mi | 0 |
| Jan 7, 1993 | EF1 | 53 km | 0.1 mi | 0 |
| Dec 17, 1992 | EF1 | 24 km | 5.0 mi | 0 |
| Dec 17, 1992 | EF1 | 43 km | 1.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Lassen Volcanic Center (129 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Lassen Volcanic Center | Stratovolcano | 3,187 m (10,456 ft) | 1917 | 129 km |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 150 km |
| Soda Lakes | Maar(s) | 1,251 m (4,104 ft) | Unknown | 193 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: NORTH COMPLEX (316,556 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | NORTH COMPLEX | 316,556 | 39 km |
| 2018 | CAMP | 153,687 | 57 km |
| 1990 | CAMPBELL | 128,266 | 97 km |
| 2014 | KING | 99,070 | 69 km |
| 2012 | CHIPS | 79,978 | 81 km |
| 2022 | MOSQUITO | 77,858 | 51 km |
| 2007 | MOONLIGHT | 65,718 | 100 km |
| 2019 | WALKER | 58,747 | 91 km |
| 2008 | BTU LIGHTNING COMPLEX (LONG BRANCH-JACK) | 52,091 | 61 km |
| 2000 | STORRIE | 49,588 | 75 km |
| 1994 | COTTONWOOD | 47,912 | 82 km |
| 2020 | LOYALTON | 45,484 | 92 km |
| 1994 | BARKLEY | 44,256 | 100 km |
| 1988 | 49R | 36,673 | 17 km |
| 1999 | MHRD COMPLEX (BUCKS) | 34,459 | 60 km |
| 2013 | AMERICAN | 27,938 | 52 km |
| 2008 | CANYON COMPLEX (SCOTCH) | 26,418 | 40 km |
| 2008 | HUMBOLDT | 23,769 | 62 km |
| 2007 | ANTELOPE COMPLEX (WHEELER) | 23,108 | 96 km |
| 1992 | CLEVELAND | 21,835 | 84 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 45°F (7°C) | 9.8 in | Wettest |
| February | 45°F (7°C) | 7.4 in | |
| March | 47°F (8°C) | 6.9 in | |
| April | 52°F (11°C) | 3.8 in | |
| May | 59°F (15°C) | 1.4 in | |
| June | 66°F (19°C) | 0.6 in | |
| July | 75°F (24°C) | 0.1 in | Warmest, Driest |
| August | 71°F (22°C) | 0.3 in | |
| September | 67°F (19°C) | 0.8 in | |
| October | 59°F (15°C) | 3.1 in | |
| November | 48°F (9°C) | 7.5 in | |
| December | 42°F (6°C) | 8.7 in | Coldest |
North San Juan has a seasonal temperature swing of 33°F / from 42°F in December to 75°F in July. Total annual precipitation is 50.4 inches, with January being the wettest month (9.8") and July the driest (0.1").