Stehekin (4 mi NW), Washington climate: Climate normals at a NOAA weather station
Stehekin (4 mi NW)'s normal year runs from 25°F January nights to 84°F July afternoons, with 36.9 inches of precipitation and 130 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.8°C, January lows of −4°C, July highs of 29°C, 937 mm of precipitation a year.
- NOAA stationStehekin (4 mi NW)
- Station IDUSC00458059
- Location48.35°N 120.73°W
- Elevation1,257 ft (383 m)
On October 23, the normal high in Stehekin (4 mi NW) is 51°F and the normal low 35°F, and the chance of measurable rain or snow is 41%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Stehekin (4 mi NW).
- Jan 32° 25°
- Feb 38° 26°
- Mar 47° 30°
- Apr 58° 36°
- May 69° 44°
- Jun 74° 50°
- Jul 84° 56°
- Aug 83° 55°
- Sep 73° 48°
- Oct 56° 38°
- Nov 40° 30°
- Dec 32° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Stehekin (4 mi NW) each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 25°F. The most precipitation falls in December (7.16 in), the least in July (0.46 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 32°F | 25°F | 28.5°F | 6.75 | 41.4 | 17 | <1 | 30 | 8 h 40 min |
| February | 38°F | 26°F | 31.9°F | 3.72 | 18.5 | 11 | <1 | 25 | 10 h 10 min |
| March | 47°F | 30°F | 38.1°F | 3.60 | 9.1 | 12 | <1 | 22 | 11 h 50 min |
| April | 58°F | 36°F | 46.6°F | 1.44 | 0.2 | 8 | <1 | 8 | 13 h 40 min |
| May | 69°F | 44°F | 56.2°F | 1.07 | 0.0 | 7 | <1 | 1 | 15 h 10 min |
| June | 74°F | 50°F | 62.2°F | 0.75 | 0.0 | 6 | 2 | <1 | 16 h |
| July | 84°F | 56°F | 70.1°F | 0.46 | 0.0 | 3 | 11 | <1 | 15 h 40 min |
| August | 83°F | 55°F | 69.3°F | 0.49 | 0.0 | 3 | 9 | <1 | 14 h 20 min |
| September | 73°F | 48°F | 60.2°F | 1.05 | 0.0 | 6 | 1 | <1 | 12 h 40 min |
| October | 56°F | 38°F | 46.8°F | 3.66 | 0.2 | 11 | <1 | 5 | 11 h |
| November | 40°F | 30°F | 35.2°F | 6.73 | 9.7 | 16 | <1 | 20 | 9 h 20 min |
| December | 32°F | 26°F | 29.0°F | 7.16 | 50.6 | 17 | <1 | 29 | 8 h 20 min |
| Year (annual) | 57°F | 39°F | 47.8°F | 36.88 | 129.7 | 116 | 24 | 141 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −4°C | −1.9°C | 171 mm | 105 cm |
| February | 3°C | −3°C | −0.1°C | 94 mm | 47 cm |
| March | 8°C | −1°C | 3.4°C | 91 mm | 23 cm |
| April | 14°C | 2°C | 8.1°C | 37 mm | 1 cm |
| May | 20°C | 7°C | 13.4°C | 27 mm | 0 cm |
| June | 24°C | 10°C | 16.8°C | 19 mm | 0 cm |
| July | 29°C | 13°C | 21.2°C | 12 mm | 0 cm |
| August | 29°C | 13°C | 20.7°C | 12 mm | 0 cm |
| September | 23°C | 9°C | 15.7°C | 27 mm | 0 cm |
| October | 13°C | 3°C | 8.2°C | 93 mm | 1 cm |
| November | 4°C | −1°C | 1.8°C | 171 mm | 25 cm |
| December | 0°C | −4°C | −1.7°C | 182 mm | 129 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00458059; 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.
Which months are mildest at Stehekin (4 mi NW)?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July 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 USC00458059.
When is the last frost at Stehekin (4 mi NW)?
In Stehekin (4 mi NW), the last spring frost (32°F) comes after April 27 in half of years and after May 12 in one year in ten; the first autumn frost comes before October 17 in half of years and before October 5 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
- April 271 year in 10 after May 12; 9 in 10 after April 12
- First autumn frost, half of years before
- October 171 year in 10 before October 5; 9 in 10 before October 30
NOAA puts the median frost-free season at 173 days, and the season without a hard freeze (28°F) at 208 days.
A hard freeze (28°F) comes after April 4 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Stehekin (4 mi NW) in zone 6b in ZIP code 98852, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 7b: the coldest night of a typical year reaches 8°F (25 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Washington · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00458059; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 at Stehekin (4 mi NW)?
In a normal year in Stehekin (4 mi NW), 24 days a year reach 90°F (2 of them 100°F or more), 141 nights fall to 32°F or colder and 116 days bring measurable precipitation.
- Days at 90°F or more
- 24a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 141a normal year
- Days that stay below freezing
- 30high of 32°F or less
- Days with 0.01 inch of precipitation
- 116a normal year
- Days with 1 inch of snow or more
- 29a normal year
The highest temperature in this station's record (since 1906) is 107°F, on July 28, 1998; the lowest is −18°F, on January 1, 1924.
The wettest calendar year on that record is 2006, with 53.54 in; the snowiest season is 1970–71, with 273.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00458059; records: ACIS (NOAA Regional Climate Centers), station USC00458059. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Stehekin (4 mi NW)?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds at Stehekin (4 mi NW), 3.5 kWh per square metre a day. August is the sunniest month (81%) and December the cloudiest (53%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 55% | 1.1 |
| February | 62% | 2.0 |
| March | 59% | 2.9 |
| April | 63% | 4.3 |
| May | 66% | 5.3 |
| June | 67% | 5.8 |
| July | 81% | 6.7 |
| August | 81% | 5.7 |
| September | 75% | 4.0 |
| October | 64% | 2.3 |
| November | 55% | 1.2 |
| December | 53% | 0.9 |
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 many heating and cooling degree days does Stehekin (4 mi NW) record?
A normal year at Stehekin (4 mi NW) brings 6,661 heating degree days, 24% more than the median U.S. place (5,373), and 432 cooling degree days, 52% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,191 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,130 | 0 |
| February | 927 | 0 |
| March | 832 | 0 |
| April | 551 | 0 |
| May | 283 | 10 |
| June | 130 | 44 |
| July | 25 | 183 |
| August | 31 | 163 |
| September | 177 | 31 |
| October | 565 | 0 |
| November | 894 | 0 |
| December | 1,117 | 0 |
| Year (annual) | 6,661 | 432 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00458059. 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.
Have recent years at Stehekin (4 mi NW) been warmer than normal?
2025 averaged 50.1°F, 2.3°F above the 1991-2020 normal of 47.8°F. 2 of the 2 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2023 | 48.1°F | +0.3°F | 29.70 | 79.3 |
| 2025 | 50.1°F | +2.3°F | 46.32 | 52.6 |
Over 84 complete years from 1920 to 2025, the station's annual mean temperature rose at a fitted 2.0°F per century (+0.11°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00458059; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Stehekin (4 mi NW)'s climate compare?
Stehekin (4 mi NW) is warmer than 15 of the 96 places with their own NOAA record in Washington, and wetter than 56. Across the 7,247 U.S. stations with normals, its annual mean of 47.8°F is warmer than 31%.
In the Köppen classification computed from these normals, Stehekin (4 mi NW) 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.
Questions about Stehekin (4 mi NW)'s climate
What is the coldest month at Stehekin (4 mi NW)?
January, with a normal high of 32°F and a normal low of 25°F. The warmest is July (84°F by day, 56°F at night).
Does it snow at Stehekin (4 mi NW)?
Yes: 130 inches in a normal year, falling on 34 days with 0.1 inch or more, the most in December (50.6 inches).
What is the rainiest month at Stehekin (4 mi NW)?
December, with 7.16 in of precipitation in a normal year; the driest is July with 0.46 in.
What plant hardiness zone is Stehekin (4 mi NW) in?
The USDA's 2023 map puts Stehekin (4 mi NW) in zone 6b in ZIP code 98852, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 8°F (25 years, 1991-2020): zone 7b.
How late can frost come at Stehekin (4 mi NW)?
In half of years the last 32°F night comes after April 27; in one year in ten it comes after May 12. Waiting until May 12 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Washington climateThe statewide normals and every place in the state
- Holden Village, WA11 miles from this station, 40.9°F a year
- Mazama, WA22 miles from this station, 45.4°F a year
- Winthrop, WA26 miles from this station, 45.7°F a year
- Ross Dam, WA30 miles from this station, 49.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made