Keno, Oregon climate: Normal weather by month, frost dates and records
Keno's normal year runs from 21°F December nights to 88°F July afternoons, with 18.9 inches of precipitation and 52 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.6°C, December lows of −6°C, July highs of 31°C, 480 mm of precipitation a year.
- NOAA stationKeno
- Station IDUSC00354403
- Location42.09°N 121.90°W
- Elevation4,128 ft (1,258 m)
- Population (census place)1,853
On October 23, the normal high in Keno is 60°F and the normal low 29°F, and the chance of measurable rain or snow is 22%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Keno.
- Jan 41° 21°
- Feb 46° 23°
- Mar 52° 26°
- Apr 58° 30°
- May 68° 37°
- Jun 77° 43°
- Jul 88° 49°
- Aug 87° 47°
- Sep 79° 39°
- Oct 64° 31°
- Nov 49° 25°
- Dec 40° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Keno each month?
July is the warmest month, with normal highs of 88°F; December the coldest, with normal lows of 21°F. The most precipitation falls in December (3.59 in), the least in July (0.31 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 41°F | 21°F | 31.1°F | 2.88 | 12.1 | 13 | <1 | 30 | 9 h 30 min |
| February | 46°F | 23°F | 34.5°F | 1.96 | 10.6 | 10 | <1 | 26 | 10 h 30 min |
| March | 52°F | 26°F | 39.1°F | 1.84 | 5.8 | 11 | <1 | 27 | 11 h 50 min |
| April | 58°F | 30°F | 43.9°F | 1.64 | 1.9 | 10 | <1 | 20 | 13 h 20 min |
| May | 68°F | 37°F | 52.5°F | 1.32 | 0.2 | 9 | <1 | 9 | 14 h 30 min |
| June | 77°F | 43°F | 60.0°F | 0.69 | 0.0 | 5 | 4 | 2 | 15 h 10 min |
| July | 88°F | 49°F | 68.3°F | 0.31 | 0.0 | 2 | 15 | <1 | 15 h |
| August | 87°F | 47°F | 66.8°F | 0.43 | 0.0 | 3 | 12 | <1 | 14 h |
| September | 79°F | 39°F | 59.4°F | 0.50 | 0.0 | 3 | 4 | 3 | 12 h 30 min |
| October | 64°F | 31°F | 47.4°F | 1.29 | 0.3 | 6 | <1 | 19 | 11 h 10 min |
| November | 49°F | 25°F | 37.2°F | 2.44 | 6.6 | 11 | <1 | 24 | 9 h 50 min |
| December | 40°F | 21°F | 30.5°F | 3.59 | 14.7 | 12 | <1 | 29 | 9 h 10 min |
| Year (annual) | 63°F | 33°F | 47.5°F | 18.89 | 52.2 | 93 | 34 | 189 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 5°C | −6°C | −0.5°C | 73 mm | 31 cm |
| February | 8°C | −5°C | 1.4°C | 50 mm | 27 cm |
| March | 11°C | −3°C | 3.9°C | 47 mm | 15 cm |
| April | 14°C | −1°C | 6.6°C | 42 mm | 5 cm |
| May | 20°C | 3°C | 11.4°C | 34 mm | 1 cm |
| June | 25°C | 6°C | 15.6°C | 18 mm | 0 cm |
| July | 31°C | 9°C | 20.2°C | 8 mm | 0 cm |
| August | 30°C | 8°C | 19.3°C | 11 mm | 0 cm |
| September | 26°C | 4°C | 15.2°C | 13 mm | 0 cm |
| October | 18°C | −1°C | 8.6°C | 33 mm | 1 cm |
| November | 10°C | −4°C | 2.9°C | 62 mm | 17 cm |
| December | 5°C | −6°C | −0.8°C | 91 mm | 37 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00354403; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Keno?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September has the fewest days with rain (3).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00354403.
When is the last frost in Keno?
In Keno, the last spring frost (32°F) comes after June 5 in half of years and after June 22 in one year in ten; the first autumn frost comes before September 20 in half of years and before September 6 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- June 51 year in 10 after June 22; 9 in 10 after May 16
- First autumn frost, half of years before
- September 201 year in 10 before September 6; 9 in 10 before October 4
NOAA puts the median frost-free season at 107 days, and the season without a hard freeze (28°F) at 142 days.
A hard freeze (28°F) comes after May 14 in half of springs and before October 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Keno in zone 6b in ZIP code 97634, the nearest ZIP area.
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00354403; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Keno?
In a normal year in Keno, 34 days a year reach 90°F (1 of them 100°F or more), 189 nights fall to 32°F or colder and 93 days bring measurable precipitation.
- Days at 90°F or more
- 34a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 189a normal year
- Days that stay below freezing
- 9high of 32°F or less
- Days with 0.01 inch of precipitation
- 93a normal year
- Days with 1 inch of snow or more
- 22a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00354403.
How sunny is Keno?
Over a year 82% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Keno, 4.7 kWh per square metre a day. July is the sunniest month (94%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 1.9 |
| February | 70% | 2.8 |
| March | 71% | 4.0 |
| April | 75% | 5.5 |
| May | 80% | 6.8 |
| June | 88% | 7.8 |
| July | 94% | 8.0 |
| August | 93% | 7.0 |
| September | 90% | 5.5 |
| October | 82% | 3.6 |
| November | 70% | 2.1 |
| December | 62% | 1.5 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Keno need?
A normal year in Keno brings 6,631 heating degree days, 23% more than the median U.S. place (5,373), and 285 cooling degree days, 69% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,912 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,053 | 0 |
| February | 855 | 0 |
| March | 803 | 0 |
| April | 633 | 0 |
| May | 392 | 3 |
| June | 192 | 40 |
| July | 35 | 137 |
| August | 30 | 86 |
| September | 189 | 19 |
| October | 546 | 1 |
| November | 835 | 0 |
| December | 1,069 | 0 |
| Year (annual) | 6,631 | 285 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00354403. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Keno been warmer than normal lately?
2024 averaged 48.2°F, 0.7°F above the 1991-2020 normal of 47.5°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2024 | 48.2°F | +0.7°F | 23.67 | 57.1 |
Source: observed years: ACIS, station USC00354403. A year counts only with all twelve months complete.
How does Keno's climate compare?
Keno is warmer than 15 of the other 104 places with their own NOAA record in Oregon, and wetter than 38. Across the 7,247 U.S. stations with normals, its annual mean of 47.5°F is warmer than 30%.
In the Köppen classification computed from these normals, Keno is Dsb: continental, dry-summer, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Keno share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Dorris, CA817 people · 9 mi S
- Macdoel, CA168 people · 19 mi S
- Mount Hebron, CA131 people · 22 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Keno's climate
What is the coldest month in Keno?
December, with a normal high of 40°F and a normal low of 21°F. The warmest is July (88°F by day, 49°F at night).
Does it snow in Keno?
Yes: 52 inches in a normal year, falling on 25 days with 0.1 inch or more, the most in December (14.7 inches).
What is the rainiest month in Keno?
December, with 3.59 in of precipitation in a normal year; the driest is July with 0.31 in.
What plant hardiness zone is Keno in?
The USDA's 2023 map puts Keno in zone 6b in ZIP code 97634, the nearest ZIP area.
How late can frost come in Keno?
In half of years the last 32°F night comes after June 5; in one year in ten it comes after June 22. Waiting until June 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Klamath Falls, OR10 miles from this station, 47.1°F a year
- Copco #1 Dam, CA24 miles from this station, 53.8°F a year
- Tulelake, CA24 miles from this station, 47.4°F a year
- Howard Prairie Dam, OR26 miles from this station, 44.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made