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Winter Weather in Sequim Washington, United States

Daily high temperatures are around 47°F, rarely falling below 36°F or exceeding 55°F. The lowest daily average high temperature is 44°F on December 27.

Daily low temperatures are around 38°F, rarely falling below 29°F or exceeding 45°F. The lowest daily average low temperature is 37°F on December 31.

For reference, on August 2, the hottest day of the year, temperatures in Sequim typically range from 55°F to 72°F, while on December 31, the coldest day of the year, they range from 37°F to 44°F.

Average High and Low Temperature in the Winter in Sequim

Average High and Low Temperature in the Winter in SequimDecJanFeb30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°FFallSpringDec 2744°FDec 2744°F37°F37°FDec 146°FDec 146°F39°F39°FFeb 2849°FFeb 2849°F39°F39°FFeb 147°FFeb 147°F38°F38°F
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average winter temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in the Winter in Sequim

Average Hourly Temperature in the Winter in SequimDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMFallSpringvery coldcoldcold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Bristol, United Kingdom (4,720 miles away) is the far-away foreign place with temperatures most similar to Sequim (view comparison).

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The winter in Sequim experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 65% throughout the season. The highest chance of overcast or mostly cloudy conditions is 67% on January 20.

The clearest day of the winter is February 20, with clear, mostly clear, or partly cloudy conditions 37% of the time.

For reference, on January 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 67%, while on August 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.

Cloud Cover Categories in the Winter in Sequim

Cloud Cover Categories in the Winter in SequimDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpringAug 275%Aug 275%Dec 135%Dec 135%Feb 2837%Feb 2837%Jan 134%Jan 134%Feb 134%Feb 134%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Sequim, the chance of a wet day over the course of the winter is rapidly decreasing, starting the season at 54% and ending it at 47%.

For reference, the year's highest daily chance of a wet day is 57% on November 17, and its lowest chance is 7% on July 31.

Over the course of the winter in Sequim, the chance of a day with only rain decreases from 53% to 47%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.

Probability of Precipitation in the Winter in Sequim

Probability of Precipitation in the Winter in SequimDecJanFeb0%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%50%50%55%55%60%60%FallSpringDec 154%Dec 154%Feb 2847%Feb 2847%Jan 149%Jan 149%Feb 147%Feb 147%rainmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the winter in Sequim is very rapidly decreasing, starting the season at 6.9 inches, when it rarely exceeds 10.8 inches or falls below 2.5 inches, and ending the season at 4.7 inches, when it rarely exceeds 8.0 inches or falls below 1.7 inches.

Average Monthly Rainfall in the Winter in Sequim

Average Monthly Rainfall in the Winter in SequimDecJanFeb0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 inFallSpringDec 16.9 inDec 16.9 inFeb 284.7 inFeb 284.7 inJan 15.7 inJan 15.7 inFeb 15.2 inFeb 15.2 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the winter in Sequim is gradually decreasing, starting the season at 0.6 inches, when it rarely exceeds 1.6 inches or falls below -0.0 inches, and ending the season at 0.2 inches, when it rarely exceeds 0.7 inches or falls below -0.0 inches.

The highest average 31-day accumulation is 1.7 inches on December 29.

Average Monthly Snowfall in the Winter in Sequim

Average Monthly Snowfall in the Winter in SequimDecJanFeb0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inFallSpringDec 291.7 inDec 291.7 inDec 10.6 inDec 10.6 inFeb 280.2 inFeb 280.2 inFeb 10.5 inFeb 10.5 in
The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Over the course of the winter in Sequim, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 2 hours, 23 minutes, implying an average daily increase of 1 minute, 36 seconds, and weekly increase of 11 minutes, 14 seconds.

The shortest day of the winter is December 21, with 8 hours, 22 minutes of daylight and the longest day is February 28, with 11 hours, 1 minute of daylight.

Hours of Daylight and Twilight in the Winter in Sequim

Hours of Daylight and Twilight in the Winter in SequimDecJanFeb0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrFallSpringDec 218 hr, 22 minDec 218 hr, 22 minnightnightdaydayFeb 2811 hr, 1 minFeb 2811 hr, 1 minFeb 19 hr, 33 minFeb 19 hr, 33 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The latest sunrise of the winter in Sequim is 8:02 AM on December 31 and the earliest sunrise is 1 hour, 8 minutes earlier at 6:54 AM on February 28.

The earliest sunset is 4:18 PM on December 10 and the latest sunset is 1 hour, 37 minutes later at 5:55 PM on February 28.

Daylight saving time is observed in Sequim during 2024, but it neither starts nor ends during the winter, so the entire season is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:12 AM and sets 16 hours, 4 minutes later, at 9:16 PM, while on December 21, the shortest day of the year, it rises at 8:00 AM and sets 8 hours, 22 minutes later, at 4:21 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in the Winter in Sequim

Sunrise & Sunset with Twilight and Daylight Saving Time in the Winter in SequimDecJanFeb12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMFallSpring6:54 AM6:54 AMFeb 285:55 PMFeb 285:55 PM7:52 AM7:52 AMDec 104:18 PMDec 104:18 PM8:02 AM8:02 AMDec 314:29 PMDec 314:29 PM7:39 AM7:39 AMFeb 15:13 PMFeb 15:13 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the winter. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in the Winter in Sequim

Solar Elevation and Azimuth in the Winter in SequimDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMFallSpring01001020
northeastsouthwest
Solar elevation and azimuth in the the winter of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for the winter of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in the Winter in Sequim

Moon Rise, Set & Phases in the Winter in SequimDecJanFeb12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMFallSpringNov 15:48 AMNov 15:48 AMNov 151:29 PMNov 151:29 PMNov 3010:22 PMNov 3010:22 PMDec 151:02 AMDec 151:02 AMDec 302:28 PMDec 302:28 PMJan 132:28 PMJan 132:28 PMJan 294:37 AMJan 294:37 AMFeb 125:54 AMFeb 125:54 AMFeb 274:45 PMFeb 274:45 PMMar 1311:55 PMMar 1311:55 PMMar 293:58 AMMar 293:58 AM8:20 AM8:20 AM5:39 PM5:39 PM7:30 AM7:30 AM3:34 PM3:34 PM8:54 AM8:54 AM8:30 AM8:30 AM3:55 PM3:55 PM4:20 PM4:20 PM8:59 AM8:59 AM8:17 AM8:17 AM5:28 PM5:28 PM7:47 AM7:47 AM5:48 PM5:48 PM6:56 PM6:56 PM7:38 AM7:38 AM8:32 PM8:32 PM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Sequim is essentially constant during the winter, remaining around 0% throughout.

Humidity Comfort Levels in the Winter in Sequim

Humidity Comfort Levels in the Winter in SequimDecJanFeb0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%FallSpringJan 150%Jan 150%Dec 10%Dec 10%Feb 280%Feb 280%Jan 10%Jan 10%Feb 10%Feb 10%drydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Sequim is gradually decreasing during the winter, decreasing from 6.1 miles per hour to 5.6 miles per hour over the course of the season.

For reference, on December 3, the windiest day of the year, the daily average wind speed is 6.2 miles per hour, while on August 11, the calmest day of the year, the daily average wind speed is 3.6 miles per hour.

The highest daily average wind speed during the winter is 6.2 miles per hour on December 3.

Average Wind Speed in the Winter in Sequim

Average Wind Speed in the Winter in SequimDecJanFeb0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mphFallSpringDec 36.2 mphDec 36.2 mphFeb 285.6 mphFeb 285.6 mphJan 15.8 mphJan 15.8 mphFeb 15.6 mphFeb 15.6 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Sequim throughout the winter is predominantly from the south, with a peak proportion of 49% on January 17.

Wind Direction in the Winter in Sequim

Wind Direction in the Winter in SequimDecJanFeb0%100%20%80%40%60%60%40%80%20%100%0%FallSpringwestsouthnortheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Sequim is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Sequim is essentially constant during the winter, remaining within 1°F of 47°F throughout.

The lowest average surface water temperature during the winter is 46°F on January 31.

Average Water Temperature in the Winter in Sequim

Average Water Temperature in the Winter in SequimDecJanFeb44°F44°F45°F45°F46°F46°F47°F47°F48°F48°F49°F49°F50°F50°F51°F51°F52°F52°FFallSpringJan 3146°FJan 3146°FDec 148°FDec 148°FFeb 2846°FFeb 2846°FJan 146°FJan 146°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Sequim typically lasts for 9.7 months (294 days), from around February 13 to around December 3, rarely starting after March 13, or ending before November 2.

The smallest chance that a given day will be within the growing season in Sequim during the winter is 20% on January 2.

Time Spent in Various Temperature Bands and the Growing Season in the Winter in Sequim

Time Spent in Various Temperature Bands and the Growing Season in the Winter in SequimDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpring53%Dec 153%Dec 173%Feb 2873%Feb 28Jan 121%Jan 121%Feb 137%Feb 137%90%Nov 290%Nov 220%Jan 220%Jan 2very coldcoldcool
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Sequim are very rapidly decreasing during the winter, decreasing by 1,538°F, from 1,544°F to 6°F, over the course of the season.

Growing Degree Days in the Winter in Sequim

Growing Degree Days in the Winter in SequimDecJanFeb0°F0°F200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°F1,200°F1,200°F1,400°F1,400°F1,600°F1,600°F1,800°F1,800°FFallSpringDec 11,544°FDec 11,544°FFeb 286°FFeb 286°F
The average growing degree days accumulated over the course of the winter, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Sequim is increasing during the winter, rising by 1.5 kWh, from 1.1 kWh to 2.5 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 0.9 kWh on December 25.

Average Daily Incident Shortwave Solar Energy in the Winter in Sequim

Average Daily Incident Shortwave Solar Energy in the Winter in SequimDecJanFeb0.0 kWh0.0 kWh0.5 kWh0.5 kWh1.0 kWh1.0 kWh1.5 kWh1.5 kWh2.0 kWh2.0 kWh2.5 kWh2.5 kWh3.0 kWh3.0 kWh3.5 kWh3.5 kWh4.0 kWh4.0 kWh4.5 kWh4.5 kWh5.0 kWh5.0 kWh5.5 kWh5.5 kWhFallSpringDec 250.9 kWhDec 250.9 kWhDec 11.1 kWhDec 11.1 kWhFeb 282.5 kWhFeb 282.5 kWhFeb 11.6 kWhFeb 11.6 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Sequim are 48.080 deg latitude, -123.102 deg longitude, and 180 ft elevation.

The topography within 2 miles of Sequim contains very significant variations in elevation, with a maximum elevation change of 991 feet and an average elevation above sea level of 256 feet. Within 10 miles contains very significant variations in elevation (4,003 feet). Within 50 miles also contains extreme variations in elevation (7,848 feet).

The area within 2 miles of Sequim is covered by cropland (58%) and artificial surfaces (39%), within 10 miles by trees (39%) and water (38%), and within 50 miles by trees (45%) and water (34%).

This report illustrates the typical weather in Sequim, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Sequim.

For each station, the records are corrected for the elevation difference between that station and Sequim according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Sequim is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sequim and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Sequim and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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