Sequim, Washington climate: Normal weather by month, frost dates and records
Sequim's normal year runs from 32°F December nights to 70°F July afternoons, with 16.9 inches of precipitation and 1 inch of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.4°C, December lows of 0°C, July highs of 21°C, 428 mm of precipitation a year.
- NOAA stationSequim (2 mi E)
- Station IDUSC00457544
- Location48.09°N 123.06°W
- Elevation50 ft (15 m)
- Population8,199
On October 23, the normal high in Sequim is 56°F and the normal low 39°F, and the chance of measurable rain or snow is 47%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Sequim.
- Jan 46° 32°
- Feb 48° 32°
- Mar 51° 35°
- Apr 56° 38°
- May 62° 44°
- Jun 65° 49°
- Jul 70° 52°
- Aug 70° 51°
- Sep 66° 46°
- Oct 58° 40°
- Nov 50° 35°
- Dec 46° 32°
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 Sequim each month?
July is the warmest month, with normal highs of 70°F; December the coldest, with normal lows of 32°F. The most precipitation falls in November (2.64 in), the least in July (0.51 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 46°F | 32°F | 39.2°F | 2.18 | 0.0 | 16 | <1 | 17 | 8 h 50 min |
| February | 48°F | 32°F | 39.9°F | 1.39 | 0.0 | 14 | <1 | 17 | 10 h 10 min |
| March | 51°F | 35°F | 42.9°F | 1.49 | 0.0 | 15 | <1 | 13 | 11 h 50 min |
| April | 56°F | 38°F | 46.8°F | 1.23 | 0.0 | 12 | <1 | 6 | 13 h 40 min |
| May | 62°F | 44°F | 52.9°F | 1.16 | 0.0 | 11 | <1 | 1 | 15 h 10 min |
| June | 65°F | 49°F | 57.1°F | 0.94 | 0.0 | 9 | <1 | <1 | 16 h |
| July | 70°F | 52°F | 60.8°F | 0.51 | 0.0 | 5 | <1 | <1 | 15 h 40 min |
| August | 70°F | 51°F | 60.7°F | 0.56 | 0.0 | 5 | <1 | <1 | 14 h 20 min |
| September | 66°F | 46°F | 56.0°F | 0.87 | 0.0 | 9 | <1 | <1 | 12 h 40 min |
| October | 58°F | 40°F | 48.7°F | 1.63 | 0.0 | 13 | <1 | 4 | 11 h |
| November | 50°F | 35°F | 42.5°F | 2.64 | 0.0 | 17 | <1 | 13 | 9 h 20 min |
| December | 46°F | 32°F | 38.8°F | 2.25 | 1.4 | 17 | <1 | 19 | 8 h 20 min |
| Year (annual) | 57°F | 40°F | 48.9°F | 16.85 | 1.4 | 141 | <1 | 89 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 8°C | 0°C | 4.0°C | 55 mm | 0 cm |
| February | 9°C | 0°C | 4.4°C | 35 mm | 0 cm |
| March | 11°C | 1°C | 6.1°C | 38 mm | 0 cm |
| April | 13°C | 3°C | 8.2°C | 31 mm | 0 cm |
| May | 16°C | 7°C | 11.6°C | 29 mm | 0 cm |
| June | 19°C | 9°C | 13.9°C | 24 mm | 0 cm |
| July | 21°C | 11°C | 16.0°C | 13 mm | 0 cm |
| August | 21°C | 11°C | 15.9°C | 14 mm | 0 cm |
| September | 19°C | 8°C | 13.3°C | 22 mm | 0 cm |
| October | 14°C | 4°C | 9.3°C | 41 mm | 0 cm |
| November | 10°C | 1°C | 5.8°C | 67 mm | 0 cm |
| December | 8°C | 0°C | 3.8°C | 57 mm | 4 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00457544; 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 Sequim?
Normal highs sit between 65°F and 85°F in 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 USC00457544.
When is the last frost in Sequim?
In Sequim, the last spring frost (32°F) comes after April 21 in half of years and after May 7 in one year in ten; the first autumn frost comes before October 20 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 211 year in 10 after May 7; 9 in 10 after April 3
- First autumn frost, half of years before
- October 201 year in 10 before October 3; 9 in 10 before November 3
NOAA puts the median frost-free season at 181 days, and the season without a hard freeze (28°F) at 225 days.
A hard freeze (28°F) comes after March 28 in half of springs and before November 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Sequim in zone 8b in ZIP code 98382, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Sequim's NOAA station is in zone 8b: the coldest night of a typical year reaches 15°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 USC00457544; 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 Sequim?
In a normal year in Sequim, a 90°F day is rare, 89 nights fall to 32°F or colder and 141 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
- 89a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 141a normal year
- Days with 1 inch of snow or more
- fewer than 1a normal year
The highest temperature in this station's record (since 1980) is 94°F, on July 11, 2007; the lowest is −3°F, on February 4, 1989.
The wettest calendar year on that record is 2015, with 23.07 in; the snowiest season is 1988–89, with 13.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00457544; records: ACIS (NOAA Regional Climate Centers), station USC00457544. Records use complete months only; a month missing more than three days is left out.
How sunny is Sequim?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Sequim, 3.5 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (51%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 52% | 1.0 |
| February | 61% | 1.9 |
| March | 61% | 2.9 |
| April | 67% | 4.3 |
| May | 71% | 5.5 |
| June | 72% | 6.0 |
| July | 82% | 6.5 |
| August | 81% | 5.5 |
| September | 76% | 3.9 |
| October | 64% | 2.2 |
| November | 55% | 1.1 |
| December | 51% | 0.8 |
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 Sequim need?
A normal year in Sequim brings 5,887 heating degree days, 10% more than the median U.S. place (5,373), and 21 cooling degree days, 98% 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 1,249 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 798 | 0 |
| February | 701 | 0 |
| March | 685 | 0 |
| April | 545 | 0 |
| May | 377 | 0 |
| June | 239 | 2 |
| July | 142 | 10 |
| August | 140 | 8 |
| September | 269 | 1 |
| October | 505 | 0 |
| November | 675 | 0 |
| December | 811 | 0 |
| Year (annual) | 5,887 | 21 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00457544. 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 Sequim been warmer than normal lately?
2025 averaged 51.6°F, 2.7°F above the 1991-2020 normal of 48.9°F. 3 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 49.7°F | +0.8°F | 20.87 | – |
| 2024 | 51.4°F | +2.5°F | 18.98 | – |
| 2025 | 51.6°F | +2.7°F | 14.59 | – |
Over 36 complete years from 1981 to 2024, the station's annual mean temperature rose at a fitted 4.0°F per century (+0.22°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00457544; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Sequim's climate compare?
Sequim is warmer than 25 of the other 95 places with their own NOAA record in Washington, and wetter than 32. Across the 7,247 U.S. stations with normals, its annual mean of 48.9°F is warmer than 36%.
In the Köppen classification computed from these normals, Sequim 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 Sequim share this climate record?
5 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.
- Carlsborg, WA1,135 people · 5 mi W
- River Road, WA952 people · 3 mi W
- Bell Hill, WA951 people · 2 mi SW
- Jamestown, WA409 people · 3 mi NW
- Blyn, WA196 people · 7 mi SE
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 Sequim's climate
What is the coldest month in Sequim?
December, with a normal high of 46°F and a normal low of 32°F. The warmest is July (70°F by day, 52°F at night).
Does it snow in Sequim?
Yes: 1 inch in a normal year, falling on 0 days with 0.1 inch or more, the most in December (1.4 inches).
What is the rainiest month in Sequim?
November, with 2.64 in of precipitation in a normal year; the driest is July with 0.51 in.
What plant hardiness zone is Sequim in?
The USDA's 2023 map puts Sequim in zone 8b in ZIP code 98382, the nearest ZIP area. By the same method at Sequim's NOAA station, the coldest night of a typical year reaches 15°F (25 years, 1991-2020): zone 8b.
How late can frost come in Sequim?
In half of years the last 32°F night comes after April 21; in one year in ten it comes after May 7. Waiting until May 7 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Sequim in OctoberThis month day by day, its records and recent years
- Washington climateThe statewide normals and every place in the state
- Port Townsend, WA14 miles from this station, 51.9°F a year
- Coupeville, WA19 miles from this station, 50.2°F a year
- Port Angeles, WA20 miles from this station, 48.5°F a year
- Quilcene, WA21 miles from this station, 50.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made