Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Denio experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 33°F in January while summers reach 74°F in July. The area gets 322 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 9.1 inches (drier than the 38-inch national average). The area receives 19.8 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 4,208 feet.
Temperature
33°F Jan (0°C)74°F Jul (23°C)
Annual Average
51.1°F
5% below US avg
January Average
33°F (0°C)
July Average
74°F (23°C)
Sunny Days
322 days/yr
Geography
Elevation
4,208 ft (1,283 m)
Area
16.1 sq mi (41.8 km²)
Population Density
26/sq mi
Coordinates
41.9889°N, 118.6375°W
Timezone
America/Los_Angeles
County
Humboldt County County
Nearest Airport
Crater Lake/Klamath Regional (LMT) 159 miles away
Precipitation & Snow
Annual Rainfall9.1"
76% below US avg
Snowfall19.8"
Wettest Month (Nov)1.14"
Driest Month (Jul)0.31"
Air Quality
AQI Median
41.0
Rating
Good
Natural Hazard Risk
Overall Risk
Very Low
Risk Score
40.8 / 100
Social Vulnerability
14.1 / 100
Community Resilience
2.3 / 100
Hazard Breakdown
Tornado
Very Low
Earthquake
Relatively Low
Wildfire
Relatively Moderate
Flood
Very Low
Hail
Very Low
Strong Wind
Very Low
Heat Wave
Relatively Low
Winter Weather
Relatively Moderate
Lightning
Very Low
Drought
Relatively Moderate
Cold Wave
Very Low
Landslide
Very Low
Volcano
Very Low
Avalanche
Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
524 earthquakes (M2.5+) recorded within 150 km since 1990.
Strongest on record: M4.7.
Sep 14, 2015
43 km E of Fort Bidwell, California
M4.7
83 km
10 km
Jul 16, 2015
42 km E of Fort Bidwell, California
M4.6
83 km
10 km
Jul 27, 2015
43 km E of Fort Bidwell, California
M4.5
82 km
11 km
Jan 22, 2015
43 km E of Fort Bidwell, California
M4.5
83 km
12 km
Jun 30, 2004
10 km NNE of New Pine Creek, Oregon
M4.4
133 km
9 km
Jul 22, 2004
Oregon
M4.3
133 km
0 km
Aug 13, 2015
44 km E of Fort Bidwell, California
M4.2
82 km
10 km
Jan 29, 2015
43 km E of Fort Bidwell, California
M4.2
83 km
9 km
Jan 4, 2015
43 km E of Fort Bidwell, California
M4.1
83 km
9 km
Jan 3, 2016
45 km E of Fort Bidwell, California
M4.1
81 km
11 km
Jul 16, 2015
42 km E of Fort Bidwell, California
M4.0
83 km
9 km
Jul 22, 2015
43 km E of Fort Bidwell, California
M4.0
83 km
8 km
Jan 22, 2015
42 km E of Fort Bidwell, California
M3.9
84 km
12 km
Jan 4, 2015
42 km E of Fort Bidwell, California
M3.9
84 km
10 km
Jun 27, 2004
11 km NNE of New Pine Creek, Oregon
M3.9
133 km
10 km
Sep 11, 2012
26 km SSE of Paradise Valley, Nevada
M3.9
127 km
0 km
Jan 13, 2015
43 km E of Fort Bidwell, California
M3.8
83 km
9 km
Jul 16, 2015
41 km E of Fort Bidwell, California
M3.8
85 km
8 km
Aug 29, 2014
Nevada
M3.8
83 km
2 km
Aug 1, 2015
43 km E of Fort Bidwell, California
M3.8
83 km
9 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
5 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF0.
Date
Rating
Distance
Path
Fatalities
Jun 1, 2019
EF0
80 km
1.3 mi
0
Jun 25, 2004
EF0
84 km
0.3 mi
0
Aug 29, 2003
EF0
85 km
0.1 mi
0
Feb 28, 1988
EF0
88 km
0.2 mi
0
Feb 28, 1988
EF0
88 km
0.2 mi
0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
2 volcanoes within 200 km.
Closest: Diamond Craters (124 km).
Name
Type
Elevation
Last Eruption
Distance
Diamond Craters
Volcanic field
1,435 m (4,708 ft)
-5610
124 km
Jordan Craters
Volcanic field
1,473 m (4,833 ft)
-1250
161 km
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km.
Largest: LONG DRAW (500,045 acres, 2012).
Year
Name
Acres Burned
Distance
2012
LONG DRAW
500,045
97 km
2012
HOLLOWAY
457,931
32 km
1985
AMAX 1
92,482
100 km
1999
JUNGO COMPLEX
77,045
28 km
1985
SENTINEL
74,645
66 km
2000
BILK CREEK COMPLEX (DOUBLE H)
69,694
68 km
2006
PUEBLO FIRE
67,854
39 km
2001
UPPER WILLOW
40,996
91 km
1999
BADGER
40,247
61 km
1985
WILDER
39,482
12 km
1985
ANGEL
38,451
69 km
2012
LONG CANYON
36,997
67 km
2000
BEATY BUTTE
32,694
68 km
2006
GRANDDAD
29,337
95 km
1985
DOUBLEH
26,856
73 km
2005
BARREL
23,077
97 km
2000
BILK CREEK COMPLEX (CHERRY CREEK)
22,988
51 km
2001
V LAKE RX
20,833
58 km
1998
SKULL CREEK
20,574
53 km
1999
BEATYBUTTE
17,616
73 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
33°F (0°C)
0.9 in
February
34°F (1°C)
0.8 in
March
40°F (4°C)
0.9 in
April
45°F (7°C)
0.9 in
May
53°F (12°C)
0.9 in
June
61°F (16°C)
0.9 in
July
74°F (23°C)
0.3 in
Warmest, Driest
August
70°F (21°C)
0.6 in
September
61°F (16°C)
0.5 in
October
50°F (10°C)
0.6 in
November
38°F (4°C)
1.1 in
Wettest
December
31°F (-1°C)
0.9 in
Coldest
Denio has a seasonal temperature swing of 43°F / from 31°F in December to 74°F in July. Total annual precipitation is 9.3 inches, with November being the wettest month (1.1") and July the driest (0.3").