Easton, Washington climate: Normal weather by month, frost dates and records
Easton's normal year runs from 25°F January nights to 76°F July afternoons, with 49.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.3°C, January lows of −4°C, July highs of 24°C, 1,266 mm of precipitation a year.
- NOAA stationEaston
- Station IDUSC00452384
- Location47.24°N 121.19°W
- Elevation2,170 ft (661 m)
- Population (census place)1,046
On October 23, the normal high in Easton is 52°F and the normal low 33°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Easton.
- Jan 36° 25°
- Feb 40° 25°
- Mar 46° 29°
- Apr 53° 33°
- May 61° 39°
- Jun 67° 45°
- Jul 76° 51°
- Aug 76° 50°
- Sep 69° 43°
- Oct 56° 35°
- Nov 43° 29°
- Dec 35° 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 in Easton each month?
July is the warmest month, with normal highs of 76°F; January the coldest, with normal lows of 25°F. The most precipitation falls in January (8.13 in), the least in July (0.71 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 36°F | 25°F | 30.0°F | 8.13 | – | <1 | 28 | 8 h 50 min |
| February | 40°F | 25°F | 32.8°F | 5.84 | – | <1 | 25 | 10 h 20 min |
| March | 46°F | 29°F | 37.3°F | 4.94 | – | <1 | 25 | 11 h 50 min |
| April | 53°F | 33°F | 42.5°F | 3.42 | – | <1 | 15 | 13 h 30 min |
| May | 61°F | 39°F | 50.0°F | 2.21 | – | <1 | 3 | 15 h |
| June | 67°F | 45°F | 56.0°F | 1.77 | – | 1 | <1 | 15 h 50 min |
| July | 76°F | 51°F | 63.0°F | 0.71 | – | 3 | <1 | 15 h 40 min |
| August | 76°F | 50°F | 63.0°F | 0.87 | – | 3 | <1 | 14 h 20 min |
| September | 69°F | 43°F | 56.2°F | 1.88 | – | 1 | 1 | 12 h 40 min |
| October | 56°F | 35°F | 45.6°F | 4.93 | – | <1 | 9 | 11 h |
| November | 43°F | 29°F | 35.9°F | 7.77 | – | <1 | 21 | 9 h 20 min |
| December | 35°F | 25°F | 30.1°F | 7.37 | – | <1 | 28 | 8 h 30 min |
| Year (annual) | 55°F | 36°F | 45.2°F | 49.84 | – | 7 | 154 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 2°C | −4°C | −1.1°C | 207 mm |
| February | 5°C | −4°C | 0.4°C | 148 mm |
| March | 8°C | −2°C | 2.9°C | 125 mm |
| April | 11°C | 0°C | 5.8°C | 87 mm |
| May | 16°C | 4°C | 10.0°C | 56 mm |
| June | 19°C | 7°C | 13.3°C | 45 mm |
| July | 24°C | 10°C | 17.2°C | 18 mm |
| August | 24°C | 10°C | 17.2°C | 22 mm |
| September | 21°C | 6°C | 13.4°C | 48 mm |
| October | 13°C | 2°C | 7.6°C | 125 mm |
| November | 6°C | −1°C | 2.2°C | 197 mm |
| December | 2°C | −4°C | −1.1°C | 187 mm |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00452384; 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 Easton?
Normal highs sit between 65°F and 85°F in 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 USC00452384.
When is the last frost in Easton?
In Easton, the last spring frost (32°F) comes after May 9 in half of years and after May 26 in one year in ten; the first autumn frost comes before October 6 in half of years and before September 24 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 91 year in 10 after May 26; 9 in 10 after April 25
- First autumn frost, half of years before
- October 61 year in 10 before September 24; 9 in 10 before October 21
NOAA puts the median frost-free season at 151 days, and the season without a hard freeze (28°F) at 180 days.
A hard freeze (28°F) comes after April 24 in half of springs and before October 20 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Easton in zone 7a in ZIP code 98925, 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 USC00452384; 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 Easton?
In a normal year in Easton, 7 days a year reach 90°F and 154 nights fall to 32°F or colder.
- Days at 90°F or more
- 7a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 154a normal year
- Days that stay below freezing
- 22high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00452384.
How sunny is Easton?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Easton, 3.8 kWh per square metre a day. July is the sunniest month (86%) and December the cloudiest (54%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 56% | 1.2 |
| February | 64% | 2.1 |
| March | 63% | 3.1 |
| April | 67% | 4.6 |
| May | 70% | 5.7 |
| June | 74% | 6.3 |
| July | 86% | 7.0 |
| August | 85% | 5.9 |
| September | 79% | 4.3 |
| October | 69% | 2.5 |
| November | 58% | 1.3 |
| December | 54% | 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 much heating and cooling does Easton need?
A normal year in Easton brings 7,310 heating degree days, 36% more than the median U.S. place (5,373), and 110 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 1,335 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,083 | 0 |
| February | 903 | 0 |
| March | 857 | 0 |
| April | 675 | 0 |
| May | 466 | 1 |
| June | 279 | 10 |
| July | 112 | 49 |
| August | 108 | 44 |
| September | 272 | 6 |
| October | 601 | 0 |
| November | 872 | 0 |
| December | 1,082 | 0 |
| Year (annual) | 7,310 | 110 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00452384. 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 Easton been warmer than normal lately?
2025 averaged 47.3°F, 2.1°F above the 1991-2020 normal of 45.2°F. 2 of the 2 complete years since 2024 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2024 | 45.9°F | +0.7°F | 34.74 |
| 2025 | 47.3°F | +2.1°F | 49.34 |
Source: observed years: ACIS, station USC00452384. A year counts only with all twelve months complete.
How does Easton's climate compare?
Easton is warmer than 2 of the other 95 places with their own NOAA record in Washington, and wetter than 68. Across the 7,247 U.S. stations with normals, its annual mean of 45.2°F is warmer than 20%.
In the Köppen classification computed from these normals, Easton 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 Easton share this climate record?
Roslyn 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.
- Roslyn, WA960 people · 3 mi NE
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 Easton's climate
What is the coldest month in Easton?
January, with a normal high of 36°F and a normal low of 25°F. The warmest is July (76°F by day, 51°F at night).
What is the rainiest month in Easton?
January, with 8.13 in of precipitation in a normal year; the driest is July with 0.71 in.
What plant hardiness zone is Easton in?
The USDA's 2023 map puts Easton in zone 7a in ZIP code 98925, the nearest ZIP area.
How late can frost come in Easton?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 26. Waiting until May 26 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Washington climateThe statewide normals and every place in the state
- Stampede Pass, WA7 miles from this station, 42.4°F a year
- Cle Elum, WA14 miles from this station, 46.4°F a year
- Cedar Lake, WA29 miles from this station, 46.7°F a year
- Palmer (3 mi ESE), WA32 miles from this station, 50.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made