Mount Adams Ranger Station, Washington climate: Climate normals at a NOAA weather station
Mount Adams Ranger Station's normal year runs from 25°F December nights to 84°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.8°C, December lows of −4°C, July highs of 29°C.
- NOAA stationMount Adams Ranger Station
- Station IDUSC00455659
- Location46.00°N 121.54°W
- Elevation1,950 ft (594 m)
On October 23, the normal high in Mount Adams Ranger Station is 56°F and the normal low 34°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Mount Adams Ranger Station.
- Jan 39° 26°
- Feb 43° 27°
- Mar 49° 29°
- Apr 58° 33°
- May 68° 40°
- Jun 74° 45°
- Jul 84° 50°
- Aug 84° 49°
- Sep 75° 42°
- Oct 60° 35°
- Nov 45° 30°
- Dec 37° 25°
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 Mount Adams Ranger Station each month?
July is the warmest month, with normal highs of 84°F; December the coldest, with normal lows of 25°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 39°F | 26°F | 32.2°F | – | <1 | 28 | 9 h |
| February | 43°F | 27°F | 34.8°F | – | <1 | 24 | 10 h 20 min |
| March | 49°F | 29°F | 39.3°F | – | <1 | 24 | 11 h 50 min |
| April | 58°F | 33°F | 45.6°F | – | <1 | 16 | 13 h 30 min |
| May | 68°F | 40°F | 53.7°F | – | <1 | 6 | 14 h 50 min |
| June | 74°F | 45°F | 59.4°F | – | 1 | 1 | 15 h 40 min |
| July | 84°F | 50°F | 66.9°F | – | 9 | <1 | 15 h 30 min |
| August | 84°F | 49°F | 66.4°F | – | 8 | <1 | 14 h 10 min |
| September | 75°F | 42°F | 58.8°F | – | 1 | 2 | 12 h 40 min |
| October | 60°F | 35°F | 47.5°F | – | <1 | 13 | 11 h |
| November | 45°F | 30°F | 37.5°F | – | <1 | 21 | 9 h 30 min |
| December | 37°F | 25°F | 31.1°F | – | <1 | 28 | 8 h 40 min |
| Year (annual) | 60°F | 36°F | 47.8°F | – | 19 | 163 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 4°C | −3°C | 0.1°C |
| February | 6°C | −3°C | 1.6°C |
| March | 10°C | −1°C | 4.1°C |
| April | 14°C | 1°C | 7.6°C |
| May | 20°C | 4°C | 12.1°C |
| June | 23°C | 7°C | 15.2°C |
| July | 29°C | 10°C | 19.4°C |
| August | 29°C | 10°C | 19.1°C |
| September | 24°C | 6°C | 14.9°C |
| October | 15°C | 2°C | 8.6°C |
| November | 7°C | −1°C | 3.1°C |
| December | 3°C | −4°C | −0.5°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Glenwood (13 miles away), gets 65 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00455659; 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 Mount Adams Ranger Station?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
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 USC00455659.
When is the last frost at Mount Adams Ranger Station?
In Mount Adams Ranger Station, the last spring frost (32°F) comes after May 18 in half of years and after June 12 in one year in ten; the first autumn frost comes before September 25 in half of years and before September 4 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
- May 181 year in 10 after June 12; 9 in 10 after May 1
- First autumn frost, half of years before
- September 251 year in 10 before September 4; 9 in 10 before October 10
NOAA puts the median frost-free season at 125 days, and the season without a hard freeze (28°F) at 161 days.
A hard freeze (28°F) comes after April 29 in half of springs and before October 9 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Mount Adams Ranger Station in zone 7a in ZIP code 98650, the nearest ZIP area.
Frost dates for every NOAA station in Washington · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00455659; 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 at Mount Adams Ranger Station?
In a normal year in Mount Adams Ranger Station, 19 days a year reach 90°F (1 of them 100°F or more) and 163 nights fall to 32°F or colder.
- Days at 90°F or more
- 19a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 163a normal year
- Days that stay below freezing
- 16high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00455659.
How sunny is it at Mount Adams Ranger Station?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds at Mount Adams Ranger Station, 4.2 kWh per square metre a day. July is the sunniest month (93%) and December the cloudiest (56%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 57% | 1.3 |
| February | 66% | 2.3 |
| March | 68% | 3.5 |
| April | 75% | 5.1 |
| May | 78% | 6.3 |
| June | 83% | 7.1 |
| July | 93% | 7.7 |
| August | 91% | 6.5 |
| September | 86% | 4.8 |
| October | 76% | 3.0 |
| November | 64% | 1.6 |
| December | 56% | 1.1 |
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 Mount Adams Ranger Station record?
A normal year at Mount Adams Ranger Station brings 6,517 heating degree days, 21% more than the median U.S. place (5,373), and 254 cooling degree days, 72% 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 1,829 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,017 | 0 |
| February | 844 | 0 |
| March | 797 | 0 |
| April | 583 | 1 |
| May | 354 | 5 |
| June | 190 | 22 |
| July | 51 | 108 |
| August | 55 | 99 |
| September | 206 | 20 |
| October | 544 | 0 |
| November | 825 | 0 |
| December | 1,052 | 0 |
| Year (annual) | 6,517 | 254 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00455659. 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.
How does Mount Adams Ranger Station's climate compare?
Mount Adams Ranger Station is warmer than 15 of the 96 places with their own NOAA record in Washington. Across the 7,247 U.S. stations with normals, its annual mean of 47.8°F is warmer than 31%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Mount Adams Ranger Station share this climate record?
Trout Lake has no NOAA station with 1991-2020 normals of its 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.
- Trout Lake, WA888 people · 1 mi E
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 Mount Adams Ranger Station's climate
What is the coldest month at Mount Adams Ranger Station?
December, with a normal high of 37°F and a normal low of 25°F. The warmest is July (84°F by day, 50°F at night).
Does it snow at Mount Adams Ranger Station?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Glenwood (13 miles away), records 65 inches of snow in a normal year.
What plant hardiness zone is Mount Adams Ranger Station in?
The USDA's 2023 map puts Mount Adams Ranger Station in zone 7a in ZIP code 98650, the nearest ZIP area.
How late can frost come at Mount Adams Ranger Station?
In half of years the last 32°F night comes after May 18; in one year in ten it comes after June 12. Waiting until June 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
- Glenwood, WA13 miles from this station, 46.7°F a year
- Snowden, WA16 miles from this station, 46.5°F a year
- Hood River Experiment Station, OR22 miles from this station, 51.1°F a year
- Carson, WA23 miles from this station, 48.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made