Long Beach, Washington climate: Normal weather by month, frost dates and records
Long Beach's normal year runs from 36°F December nights to 67°F August afternoons, with 78.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.9°C, December lows of 2°C, August highs of 19°C, 1,994 mm of precipitation a year.
- NOAA stationLong Beach Experiment Station
- Station IDUSC00454748
- Location46.37°N 124.04°W
- Elevation25 ft (8 m)
- Population1,761
On October 14, the normal high in Long Beach is 60°F and the normal low 42°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 Long Beach.
- Jan 49° 36°
- Feb 50° 35°
- Mar 52° 37°
- Apr 55° 40°
- May 59° 45°
- Jun 62° 49°
- Jul 65° 52°
- Aug 67° 52°
- Sep 66° 48°
- Oct 60° 42°
- Nov 53° 38°
- Dec 48° 36°
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 Long Beach each month?
August is the warmest month, with normal highs of 67°F; December the coldest, with normal lows of 36°F. The most precipitation falls in December (12.15 in), the least in July (1.01 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 49°F | 36°F | 42.4°F | 12.04 | 23 | <1 | 9 | 9 h |
| February | 50°F | 35°F | 42.9°F | 7.76 | 18 | <1 | 8 | 10 h 20 min |
| March | 52°F | 37°F | 44.9°F | 8.71 | 24 | <1 | 5 | 11 h 50 min |
| April | 55°F | 40°F | 47.6°F | 6.79 | 21 | <1 | 1 | 13 h 30 min |
| May | 59°F | 45°F | 52.0°F | 3.55 | 16 | <1 | <1 | 15 h |
| June | 62°F | 49°F | 55.4°F | 2.58 | 14 | <1 | <1 | 15 h 50 min |
| July | 65°F | 52°F | 58.5°F | 1.01 | 11 | <1 | <1 | 15 h 30 min |
| August | 67°F | 52°F | 59.0°F | 1.63 | 11 | <1 | <1 | 14 h 10 min |
| September | 66°F | 48°F | 56.9°F | 2.66 | 12 | <1 | <1 | 12 h 40 min |
| October | 60°F | 42°F | 51.0°F | 8.20 | 20 | <1 | 1 | 11 h |
| November | 53°F | 38°F | 45.4°F | 11.43 | 22 | <1 | 7 | 9 h 30 min |
| December | 48°F | 36°F | 42.0°F | 12.15 | 23 | <1 | 9 | 8 h 40 min |
| Year (annual) | 57°F | 43°F | 49.8°F | 78.51 | 214 | <1 | 41 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 9°C | 2°C | 5.8°C | 306 mm |
| February | 10°C | 2°C | 6.1°C | 197 mm |
| March | 11°C | 3°C | 7.2°C | 221 mm |
| April | 13°C | 5°C | 8.7°C | 172 mm |
| May | 15°C | 7°C | 11.1°C | 90 mm |
| June | 17°C | 9°C | 13.0°C | 66 mm |
| July | 18°C | 11°C | 14.7°C | 26 mm |
| August | 19°C | 11°C | 15.0°C | 41 mm |
| September | 19°C | 9°C | 13.8°C | 68 mm |
| October | 15°C | 6°C | 10.6°C | 208 mm |
| November | 11°C | 3°C | 7.4°C | 290 mm |
| December | 9°C | 2°C | 5.6°C | 309 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00454748; 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 Long Beach?
Normal highs sit between 65°F and 85°F in July, August and September. Of those, July has the fewest days with rain (11).
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 USC00454748.
When is the last frost in Long Beach?
In Long Beach, the last spring frost (32°F) comes after April 6 in half of years and after April 28 in one year in ten; the first autumn frost comes before October 26 in half of years and before October 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
- April 61 year in 10 after April 28; 9 in 10 after March 16
- First autumn frost, half of years before
- October 261 year in 10 before October 4; 9 in 10 before November 16
NOAA puts the median frost-free season at 200 days, and the season without a hard freeze (28°F) at 253 days.
A hard freeze (28°F) comes after March 6 in half of springs and before November 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Long Beach in zone 9a in ZIP code 98631, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Long Beach's NOAA station is in zone 9a: the coldest night of a typical year reaches 21°F (25 complete years).
Frost dates for every NOAA station in Washington · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00454748; 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 Long Beach?
In a normal year in Long Beach, a 90°F day is rare, 41 nights fall to 32°F or colder and 214 days bring measurable precipitation.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 41a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 214a normal year
The highest temperature in this station's record (since 1967) is 92°F, on September 25, 1974; the lowest is 0°F, on December 8, 1972.
The wettest calendar year on that record is 1968, with 111.49 in; the snowiest season is 1970–71, with 13.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00454748; records: ACIS (NOAA Regional Climate Centers), station USC00454748. Records use complete months only; a month missing more than three days is left out.
How sunny is Long Beach?
Over a year 67% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Long Beach, 3.4 kWh per square metre a day. September is the sunniest month (74%) and January the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 55% | 1.1 |
| February | 62% | 2.0 |
| March | 64% | 3.1 |
| April | 67% | 4.5 |
| May | 67% | 5.3 |
| June | 68% | 5.7 |
| July | 70% | 5.6 |
| August | 71% | 4.9 |
| September | 74% | 4.0 |
| October | 67% | 2.5 |
| November | 60% | 1.4 |
| December | 56% | 1.0 |
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 Long Beach need?
A normal year in Long Beach brings 5,529 heating degree days, 3% more than the median U.S. place (5,373), and 6 cooling degree days, 99% 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 1,140 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 702 | 0 |
| February | 619 | 0 |
| March | 625 | 0 |
| April | 522 | 0 |
| May | 403 | 0 |
| June | 287 | 0 |
| July | 202 | 1 |
| August | 186 | 2 |
| September | 245 | 3 |
| October | 436 | 0 |
| November | 590 | 0 |
| December | 713 | 0 |
| Year (annual) | 5,529 | 6 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00454748. 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 Long Beach been warmer than normal lately?
Over 112 complete years from 1884 to 2018, the station's annual mean temperature rose at a fitted 1.1°F per century (+0.06°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 Long Beach's climate compare?
Long Beach is warmer than 34 of the other 95 places with their own NOAA record in Washington, and wetter than 81. Across the 7,247 U.S. stations with normals, its annual mean of 49.8°F is warmer than 39%.
In the Köppen classification computed from these normals, Long Beach 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 Long Beach share this climate record?
Ocean Park 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.
- Ocean Park, WA1,777 people · 9 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.
Questions about Long Beach's climate
What is the coldest month in Long Beach?
December, with a normal high of 48°F and a normal low of 36°F. The warmest is August (67°F by day, 52°F at night).
Does it snow in Long Beach?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Long Beach?
December, with 12.15 in of precipitation in a normal year; the driest is July with 1.01 in.
What plant hardiness zone is Long Beach in?
The USDA's 2023 map puts Long Beach in zone 9a in ZIP code 98631, the nearest ZIP area. By the same method at Long Beach's NOAA station, the coldest night of a typical year reaches 21°F (25 years, 1991-2020): zone 9a.
How late can frost come in Long Beach?
In half of years the last 32°F night comes after April 6; in one year in ten it comes after April 28. Waiting until April 28 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, WA14 miles from this station, 50.7°F a year
- Astoria, OR16 miles from this station, 51.4°F a year
- Fort Clatsop National Mem, OR18 miles from this station, 51.8°F a year
- Grays River Hatchery, WA23 miles from this station, 51.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made