Grays River Hatchery, Washington climate: Climate normals at a NOAA weather station
Grays River Hatchery's normal year runs from 34°F December nights to 77°F August afternoons, with 103.5 inches of precipitation and 2 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.9°C, December lows of 1°C, August highs of 25°C, 2,630 mm of precipitation a year.
- NOAA stationGrays River Hatchery
- Station IDUSC00453333
- Location46.39°N 123.56°W
- Elevation100 ft (31 m)
On October 23, the normal high in Grays River Hatchery is 61°F and the normal low 39°F, and the chance of measurable rain or snow is 54%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Grays River Hatchery.
- Jan 50° 34°
- Feb 54° 33°
- Mar 56° 35°
- Apr 61° 38°
- May 67° 43°
- Jun 70° 46°
- Jul 77° 50°
- Aug 77° 50°
- Sep 74° 46°
- Oct 64° 41°
- Nov 55° 36°
- Dec 49° 34°
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 Grays River Hatchery each month?
August is the warmest month, with normal highs of 77°F; December the coldest, with normal lows of 34°F. The most precipitation falls in January (16.73 in), the least in July (1.17 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 50°F | 34°F | 41.8°F | 16.73 | 1.5 | 20 | <1 | 15 | 9 h |
| February | 54°F | 33°F | 43.5°F | 10.06 | 0.3 | 17 | <1 | 14 | 10 h 20 min |
| March | 56°F | 35°F | 45.4°F | 11.63 | 0.1 | 20 | <1 | 11 | 11 h 50 min |
| April | 61°F | 38°F | 49.2°F | 8.13 | 0.0 | 18 | <1 | 7 | 13 h 30 min |
| May | 67°F | 43°F | 54.8°F | 4.36 | 0.0 | 13 | <1 | 2 | 15 h |
| June | 70°F | 46°F | 58.4°F | 3.44 | 0.0 | 10 | 1 | 1 | 15 h 50 min |
| July | 77°F | 50°F | 63.3°F | 1.17 | 0.0 | 5 | 2 | <1 | 15 h 30 min |
| August | 77°F | 50°F | 63.4°F | 1.90 | 0.0 | 6 | 2 | <1 | 14 h 10 min |
| September | 74°F | 46°F | 60.0°F | 4.40 | 0.0 | 8 | 1 | <1 | 12 h 40 min |
| October | 64°F | 41°F | 52.4°F | 10.22 | 0.0 | 15 | <1 | 5 | 11 h |
| November | 55°F | 36°F | 45.4°F | 15.24 | 0.0 | 20 | <1 | 11 | 9 h 30 min |
| December | 49°F | 34°F | 41.6°F | 16.27 | 0.2 | 21 | <1 | 13 | 8 h 40 min |
| Year (annual) | 63°F | 40°F | 51.6°F | 103.55 | 2.1 | 173 | 6 | 78 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 10°C | 1°C | 5.4°C | 425 mm | 4 cm |
| February | 12°C | 1°C | 6.4°C | 256 mm | 1 cm |
| March | 13°C | 2°C | 7.4°C | 295 mm | 0 cm |
| April | 16°C | 3°C | 9.6°C | 207 mm | 0 cm |
| May | 19°C | 6°C | 12.7°C | 111 mm | 0 cm |
| June | 21°C | 8°C | 14.7°C | 87 mm | 0 cm |
| July | 25°C | 10°C | 17.4°C | 30 mm | 0 cm |
| August | 25°C | 10°C | 17.4°C | 48 mm | 0 cm |
| September | 24°C | 8°C | 15.6°C | 112 mm | 0 cm |
| October | 18°C | 5°C | 11.3°C | 260 mm | 0 cm |
| November | 13°C | 2°C | 7.4°C | 387 mm | 0 cm |
| December | 10°C | 1°C | 5.3°C | 413 mm | 1 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00453333; 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 Grays River Hatchery?
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 (5).
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 USC00453333.
When is the last frost at Grays River Hatchery?
In Grays River Hatchery, the last spring frost (32°F) comes after April 27 in half of years and after May 18 in one year in ten; the first autumn frost comes before October 22 in half of years and before October 3 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 18; 9 in 10 after April 2
- First autumn frost, half of years before
- October 221 year in 10 before October 3; 9 in 10 before November 11
NOAA puts the median frost-free season at 178 days, and the season without a hard freeze (28°F) at 236 days.
A hard freeze (28°F) comes after March 25 in half of springs and before November 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Grays River Hatchery in zone 8b in ZIP code 98621, 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 USC00453333; 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 Grays River Hatchery?
In a normal year in Grays River Hatchery, 6 days a year reach 90°F, 78 nights fall to 32°F or colder and 173 days bring measurable precipitation.
- Days at 90°F or more
- 6a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 78a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 173a normal year
- Days with 1 inch of snow or more
- 1a normal year
The highest temperature in this station's record (since 1962) is 105°F, on July 28, 2009; the lowest is 2°F, on December 8, 1972.
The wettest calendar year on that record is 1968, with 136.06 in; the snowiest season is 1970–71, with 47.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00453333; records: ACIS (NOAA Regional Climate Centers), station USC00453333. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Grays River Hatchery?
Over a year 67% of the sunlight that would reach the ground under clear skies gets through the clouds at Grays River Hatchery, 3.5 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 52% | 1.1 |
| February | 59% | 2.0 |
| March | 57% | 2.9 |
| April | 62% | 4.2 |
| May | 66% | 5.2 |
| June | 67% | 5.7 |
| July | 78% | 6.4 |
| August | 78% | 5.4 |
| September | 75% | 4.0 |
| October | 65% | 2.4 |
| November | 55% | 1.3 |
| December | 52% | 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 Grays River Hatchery record?
A normal year at Grays River Hatchery brings 4,985 heating degree days, 7% fewer than the median U.S. place (5,373), and 112 cooling degree days, 88% 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 1,753 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 721 | 0 |
| February | 601 | 0 |
| March | 608 | 0 |
| April | 476 | 0 |
| May | 321 | 5 |
| June | 212 | 12 |
| July | 95 | 42 |
| August | 84 | 36 |
| September | 165 | 16 |
| October | 391 | 1 |
| November | 587 | 0 |
| December | 727 | 0 |
| Year (annual) | 4,985 | 112 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00453333. 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 Grays River Hatchery's climate compare?
Grays River Hatchery is warmer than 74 of the 96 places with their own NOAA record in Washington, and wetter than 86. Across the 7,247 U.S. stations with normals, its annual mean of 51.6°F is warmer than 48%.
In the Köppen classification computed from these normals, Grays River Hatchery is Csb: temperate, 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 Grays River Hatchery 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.
- Knappa, OR922 people · 15 mi S
- Pe Ell, WA671 people · 18 mi NE
- Grays River, WA190 people · 2 mi SW
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 Grays River Hatchery's climate
What is the coldest month at Grays River Hatchery?
December, with a normal high of 49°F and a normal low of 34°F. The warmest is August (77°F by day, 50°F at night).
Does it snow at Grays River Hatchery?
Yes: 2 inches in a normal year, falling on 1 days with 0.1 inch or more, the most in January (1.5 inches).
What is the rainiest month at Grays River Hatchery?
January, with 16.73 in of precipitation in a normal year; the driest is July with 1.17 in.
What plant hardiness zone is Grays River Hatchery in?
The USDA's 2023 map puts Grays River Hatchery in zone 8b in ZIP code 98621, the nearest ZIP area.
How late can frost come at Grays River Hatchery?
In half of years the last 32°F night comes after April 27; in one year in ten it comes after May 18. Waiting until May 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Washington climateThe statewide normals and every place in the state
- Naselle, WA9 miles from this station, 50.7°F a year
- Raymond, WA20 miles from this station, 49.8°F a year
- Astoria, OR22 miles from this station, 51.4°F a year
- Long Beach, WA23 miles from this station, 49.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made