Aberdeen, Washington climate: Normal weather by month, frost dates and records
Aberdeen's normal year runs from 37°F December nights to 69°F August afternoons, with 84.9 inches of precipitation and less than an inch of snow (0.5 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.8°C, December lows of 3°C, August highs of 21°C, 2,157 mm of precipitation a year.
- NOAA stationAberdeen
- Station IDUSC00450008
- Location46.97°N 123.83°W
- Elevation10 ft (3 m)
- From the center1 miles
- Population17,044
On October 22, the normal high in Aberdeen is 59°F and the normal low 44°F, and the chance of measurable rain or snow is 60%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Aberdeen.
- Jan 48° 37°
- Feb 50° 37°
- Mar 53° 38°
- Apr 57° 41°
- May 61° 47°
- Jun 65° 51°
- Jul 68° 54°
- Aug 69° 54°
- Sep 69° 51°
- Oct 61° 45°
- Nov 52° 40°
- Dec 47° 37°
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 Aberdeen each month?
August is the warmest month, with normal highs of 69°F; December the coldest, with normal lows of 37°F. The most precipitation falls in January (13.93 in), the least in July (0.91 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 48°F | 37°F | 42.5°F | 13.93 | 22 | <1 | 8 | 8 h 50 min |
| February | 50°F | 37°F | 43.5°F | 8.58 | 19 | <1 | 8 | 10 h 20 min |
| March | 53°F | 38°F | 45.8°F | 9.76 | 22 | <1 | 5 | 11 h 50 min |
| April | 57°F | 41°F | 48.8°F | 6.28 | 19 | <1 | 1 | 13 h 30 min |
| May | 61°F | 47°F | 54.0°F | 3.46 | 14 | <1 | <1 | 15 h |
| June | 65°F | 51°F | 58.0°F | 2.40 | 12 | <1 | <1 | 15 h 50 min |
| July | 68°F | 54°F | 61.2°F | 0.91 | 7 | 1 | <1 | 15 h 30 min |
| August | 69°F | 54°F | 61.8°F | 1.52 | 7 | 1 | <1 | 14 h 20 min |
| September | 69°F | 51°F | 59.9°F | 2.73 | 9 | <1 | <1 | 12 h 40 min |
| October | 61°F | 45°F | 52.9°F | 8.27 | 18 | <1 | 1 | 11 h |
| November | 52°F | 40°F | 45.9°F | 13.72 | 22 | <1 | 4 | 9 h 20 min |
| December | 47°F | 37°F | 41.7°F | 13.38 | 23 | <1 | 8 | 8 h 30 min |
| Year (annual) | 58°F | 44°F | 51.4°F | 84.94 | 192 | 2 | 35 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 9°C | 3°C | 5.8°C | 354 mm |
| February | 10°C | 3°C | 6.4°C | 218 mm |
| March | 12°C | 4°C | 7.7°C | 248 mm |
| April | 14°C | 5°C | 9.3°C | 160 mm |
| May | 16°C | 8°C | 12.2°C | 88 mm |
| June | 18°C | 11°C | 14.4°C | 61 mm |
| July | 20°C | 12°C | 16.2°C | 23 mm |
| August | 21°C | 12°C | 16.6°C | 39 mm |
| September | 20°C | 11°C | 15.5°C | 69 mm |
| October | 16°C | 7°C | 11.6°C | 210 mm |
| November | 11°C | 4°C | 7.7°C | 348 mm |
| December | 8°C | 3°C | 5.4°C | 340 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00450008; 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 Aberdeen?
Normal highs sit between 65°F and 85°F in July, August and September. Of those, July has the fewest days with rain (7).
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 USC00450008.
When is the last frost in Aberdeen?
In Aberdeen, the last spring frost (32°F) comes after March 29 in half of years and after April 20 in one year in ten; the first autumn frost comes before November 15 in half of years and before October 27 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
- March 291 year in 10 after April 20; 9 in 10 after February 25
- First autumn frost, half of years before
- November 151 year in 10 before October 27; 9 in 10 before December 10
NOAA puts the median frost-free season at 234 days, and the season without a hard freeze (28°F) at 304 days.
A hard freeze (28°F) comes after February 18 in half of springs and before December 6 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Aberdeen in zone 8b in ZIP code 98520, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Aberdeen's NOAA station is in zone 9a: the coldest night of a typical year reaches 23°F (28 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 USC00450008; 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 in Aberdeen?
In a normal year in Aberdeen, 2 days a year reach 90°F, 35 nights fall to 32°F or colder and 192 days bring measurable precipitation.
- Days at 90°F or more
- 2a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 35a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 192a normal year
The highest temperature in this station's record (since 1891) is 105°F, on July 23, 1891; the lowest is 6°F, on January 14, 1950.
The wettest calendar year on that record is 1933, with 112.80 in; the snowiest season is 1948–49, with 27.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00450008; records: ACIS (NOAA Regional Climate Centers), station USC00450008. Records use complete months only; a month missing more than three days is left out.
How sunny is Aberdeen?
Over a year 67% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Aberdeen, 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 much heating and cooling does Aberdeen need?
A normal year in Aberdeen brings 5,017 heating degree days, 7% fewer than the median U.S. place (5,373), and 53 cooling degree days, 94% 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 1,591 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 696 | 0 |
| February | 602 | 0 |
| March | 594 | 0 |
| April | 485 | 1 |
| May | 345 | 4 |
| June | 218 | 7 |
| July | 131 | 13 |
| August | 113 | 15 |
| September | 165 | 12 |
| October | 376 | 1 |
| November | 572 | 0 |
| December | 721 | 0 |
| Year (annual) | 5,017 | 53 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00450008. 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 Aberdeen been warmer than normal lately?
Over 94 complete years from 1904 to 2020, the station's annual mean temperature rose at a fitted 1.0°F per century (+0.05°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Aberdeen's climate compare?
Aberdeen is warmer than 67 of the other 95 places with their own NOAA record in Washington, and wetter than 84. Across the 7,247 U.S. stations with normals, its annual mean of 51.4°F is warmer than 47%.
In the Köppen classification computed from these normals, Aberdeen 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 Aberdeen 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.
- Central Park, WA3,203 people · 6 mi E
- Cosmopolis, WA1,663 people · 3 mi E
- Aberdeen Gardens, WA406 people · 7 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Aberdeen's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Aberdeen. This page uses Aberdeen; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Aberdeen (20 mi NNE) USC00450013 | 20 mi N | 435 ft | 49.6°F | 35°F | 74°F | 133.9 | – | April 15 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Aberdeen's climate
What is the coldest month in Aberdeen?
December, with a normal high of 47°F and a normal low of 37°F. The warmest is August (69°F by day, 54°F at night).
Does it snow in Aberdeen?
Rarely: NOAA's normal is 0.5 inch a year.
What is the rainiest month in Aberdeen?
January, with 13.93 in of precipitation in a normal year; the driest is July with 0.91 in.
What plant hardiness zone is Aberdeen in?
The USDA's 2023 map puts Aberdeen in zone 8b in ZIP code 98520, the nearest ZIP area. By the same method at Aberdeen's NOAA station, the coldest night of a typical year reaches 23°F (28 years, 1991-2020): zone 9a.
How late can frost come in Aberdeen?
In half of years the last 32°F night comes after March 29; in one year in ten it comes after April 20. Waiting until April 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Washington climateThe statewide normals and every place in the state
- Hoquiam, WA5 miles from this station, 51.0°F a year
- Grayland, WA17 miles from this station, 50.8°F a year
- Humptulips, WA20 miles from this station, 48.8°F a year
- Elma, WA21 miles from this station, 52.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made