Climate and monthly weather forecastSequim, WA
Climate and monthly weather forecast
The climate of Sequim
Predominantly seen in Sequim, Washington, USA, the Köppen climate classification falls under Csb. This classification belongs to the Mediterranean climatic region, known for its warm summer. Nestled on the Olympic Peninsula in Washington, Sequim's position yields intriguing weather patterns distinct to this region.Throughout the 12 months, Sequim experiences varying weather conditions, attributable to its Mediterranean classification. Temperature exhibits an ascending trend from January, reaching its peak in July and August with an average high of 68°F (20°C), before gradually descending towards December. A similar trend is noticeable in the minimum temperatures, showcasing the mildest winter lows at 34.7°F (1.5°C) in December and the maximum at 52.3°F (11.3°C) in August.
Sequim's distinct weather patterns are evident in its rainfall distribution. It receives the highest rainfall in November with rainfall measuring 2.48" (63mm), while July witnesses the least precipitation with 0.59" (15mm). The city also observes variability in daylight hours, from a minimum of 8.5 hours in December to a maximum of 16 hours in June, enhancing its uniqueness.
The coastal town experiences a relatively high level of humidity throughout the year, around 84% in January, February, March, and November. These levels slightly dip during the summer months, to reach the yearly low of 75% during July and August.
The best time to visit Sequim
Considering the climate in Sequim, the best time to visit depends largely on an individual's preference for activities and weather. However, in general terms, July and August are particularly attractive. During these months, Sequim offers its warmest weather with a peak temperature of 68°F (20°C), the least rainfall at an average of 0.59" (15mm) to 0.79" (20mm), and the longest daylight hours up to 16 hours. This combination of climatic conditions provides ample opportunities to enjoy outdoor activities, explore natural vistas and immerse oneself in the local culture.The worst time to visit Sequim
Conversely, the least favorable period to visit Sequim falls between November and February. November sees the highest rainfall levels of 2.48" (63mm). The daylight duration contracts during these months to a low of 8.5 hours in December, and average temperatures dip to a chilly 34.7°F (1.5°C) in December. Despite these weather conditions, die-hard adventurers and lovers of tranquility might find interest during this period, especially the snowfall observed in January at 2.17" (55mm).Spring weather in Sequim
Spring carries a sense of renewal to Sequim’s weather. Between March and May, temperatures begin to pick up, as the average high increases from 45.7°F (7.6°C) to 57.7°F (14.3°C) and the average low ascends from 36.1°F (2.3°C) to 44.2°F (6.8°C). Daylight hours progressively increase, allowing up to 15.2 hours of light by May. Rainfall during this season declines steadily from 1.69" (43mm) in March to 1.5" (38mm) in May. The spring weather coupled with blooming flowers makes the season a pleasant time for a visit to the coastal town.Summer weather in Sequim
Summer in Sequim, spanning from June to August, is characterized by an inviting warmth. The town experiences the highest temperatures of the year in this season, fluctuating from 61.3°F (16.3°C) to 68°F (20°C). At the same time, it registers the least rainfall from 1.18" (30mm) in June to a minimal 0.59" (15mm) in July. Spending long summer days under the sun is feasible, as June records 16 daylight hours. These conditions provide an ideal atmosphere for outdoor activities, especially those involving the beach and the attractive coastline.Autumn weather in Sequim
During the fall season, Sequim's weather begins to shift from its summer warmth. Between September and November, temperatures progressively drop from 62.6°F (17°C) to 46.4°F (8°C) while lows range between 49.3°F (9.6°C) and 39.2°F (4°C). Rainfall begins to increase from September's average of 1.54" (39mm), peaking at November's 2.48" (63mm). The changing foliage and moderate weather conditions create a picturesque setting for autumn vacations.Winter weather in Sequim
Winter ushers in Sequim's coldest weather. The average high hovers between 53.8°F (12.1°C) and 41.2°F (5.1°C) from December to February, while the average low ranges from 44.6°F (7°C) to 34.7°F (1.5°C). Snowfall is seldomly witnessed, with 2.17" (55mm) recorded in February being the maximum throughout the year. Despite the cold and limited daylight hours of 8.5 hours, the town maintains its tranquility and offers serene landscapes under the winter sky.Weather in January
Entering the new year, Sequim, Washington experiences the coldest month, with an average high temperature of 42.4°F (5.8°C) and low of 35.2°F (1.8°C). Sunny days are few but treasured during this period. The high humidity, cloud coverage, and chill set the mood for the winter season. Weather in January »Weather in February
Moving into February, the weather maintains a similar demeanor, cold and crisp. The transition from January to February is hardly noticeable in Sequim. Winter continues its reign as snowfall slightly increases, making it the month with the highest snowfall at 2.17" (55mm). Weather in February »Weather in March
March brings a slight shift in the weather with an average high temperature of 45.7°F (7.6°C). The mark of spring in Sequim comes with an increase in daylight hours. The city witnesses a decrease in humidity, making the weather fairly comfortable. Weather in March »Weather in April
April ushers in a noticeable change in weather conditions as it carries a promise of warmer days. An increase in the average high temperature to 50.5°F (10.3°C) marks the switch to a more comfortable weather pattern. In comparison to the previous month, rainfall decreases to 1.26" (32mm), marking this month as the driest in the first half of the year. Weather in April »Weather in May
May in Sequim, Washington is characterized by warmer temperatures, peaking at an average high of 57.7°F (14.3°C). A discerning eye would also notice an increase in the total sunshine hours. May is a period of transition from the freshness of spring to the heat of summer. Weather in May »Weather in June
As June takes over, the summers start setting in Sequim. The temperatures further climb to an average high and low of 61.3°F (16.3°C) and 47.7°F (8.7°C) respectively. Extended daylight hours and relatively drier conditions come with the arrival of summer. Weather in June »Weather in July
July is the peak of summer, the sunniest and the warmest month, with an average high temperature of 67.5°F (19.7°C). In comparison to the previous month, the precipitation decreases to a fine 0.59" (15mm), offering lesser rainy days. Weather in July »Weather in August
Despite the transition from July to August, Sequim continues to enjoy the summer sun. However, there's a slight increase in rainfall to 0.79" (20mm). Daylight remains abundant, offering the residents plenty of time to enjoy the outdoors. Weather in August »Weather in September
September signals the end of the peak summer period and welcomes the arrival of Fall in Sequim. With the average high temperature decreasing to 62.6°F (17°C), there's a slight nip in the air. September usually experiences a spell of late summer with clear skies and lower humidity. Weather in September »Weather in October
October in Sequim, Washington paints a charming picture of Fall with typical Pacific Northwest weather. Temperatures continue their downward trend, averaging at a high of 53.8°F (12.1°C) and a low of 44.6°F (7°C). The arrival of this month brings an increased chance of rain showers. Weather in October »Weather in November
November marks the onset of Winter with chilly wind gusts reaching up to 9.8 MPH. Average high temperature further dips to 46.4°F (8°C). As the winter chill starts settling in Sequim, rainfall increases to 2.48" (63mm). Walks on Dungeness Spit might require a warm jacket and an umbrella. Weather in November »Weather in December
December comes with a festive mood and brings back the cold winter weather to Sequim, as average temperatures hover around 41.2°F (5.1°C). Sunlight hours are at their lowest, while cloud coverage is at its highest. Despite the cold, snowfall remains at a minimal 0.08" (2mm). Weather in December »Updated: Feb 14, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January and February, with an average relative humidity of 85%, are most humid months in Sequim.
The month with the most rainfall in Sequim, Washington, is January, when the rain falls for 16.1 days and typically aggregates up to 2.56" (65mm) of precipitation.
Throughout the year, there are 174.1 rainfall days, and 19.45" (494mm) of precipitation is accumulated.
January through April, November and December are months with snowfall.
Throughout the year, in Sequim, there are 7 snowfall days, and 3.86" (98mm) of snow is accumulated.
With an average of 4.7h of sunshine, January has the least sunshine of the year in Sequim, Washington.
The months with the lowest UV index in Sequim are January through March, November and December, with an average maximum UV index of 2.
The month with the most snowfall in Sequim, Washington, is February, when snow falls for 2.8 days and typically aggregates up to 2.17" (55mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Sequim, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
In Sequim, Washington, snow does not fall in May through October.
May through September, with an average maximum UV index of 4, are months with the highest UV index in Sequim, Washington.
The month with the longest days in Sequim is June, with an average of 16h and 0min of daylight.
The months with the lowest humidity are July and August, with an average relative humidity of 75%.
July is the month with the least rainfall in Sequim, Washington. Rain falls for 9.2 days and accumulates 0.59" (15mm) of precipitation.
The month of August, characterized by an average high of 68°F (20°C) and a low of 52.3°F (11.3°C), is recognized as the warmest.
With an average of 11h of sunshine, August has the most sunshine of the year.
Sequim notes the coldest temperatures in December, with a average high of 41.2°F (5.1°C) and a low of 34.7°F (1.5°C).
The month with the shortest days in Sequim, Washington, is December, with an average of 8h and 24min of daylight.
Average temperature
Sequim, WA
The warmest month (with the highest average high temperature) is August (68°F).
The month with the lowest average high temperature is December (41.2°F).
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is February (34.3°F).
Average pressure
Sequim, WA
- Average pressure in January:
30.07"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30"Hg - Average pressure in April:
30.05"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
30.04"Hg
- Average pressure in July:
30.06"Hg - Average pressure in August:
30.02"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.02"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed
Sequim, WA
- Average wind speed in January:
5.3mph - Average wind speed in February:
5.3mph - Average wind speed in March:
5.4mph - Average wind speed in April:
4.9mph - Average wind speed in May:
4mph - Average wind speed in June:
4mph
- Average wind speed in July:
4mph - Average wind speed in August:
3.7mph - Average wind speed in September:
3.7mph - Average wind speed in October:
4.6mph - Average wind speed in November:
5.9mph - Average wind speed in December:
5.5mph
The windiest month (with the highest average wind speed) is November (5.9mph).
The calmest months (with the lowest average wind speed) are August and September (3.7mph).
Average humidity
Sequim, WA
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July and August (75%).
Average rainfall
Sequim, WA
- Average rainfall in January:
2.56" - Average rainfall in February:
1.97" - Average rainfall in March:
1.69" - Average rainfall in April:
1.26" - Average rainfall in May:
1.5" - Average rainfall in June:
1.18"
- Average rainfall in July:
0.59" - Average rainfall in August:
0.79" - Average rainfall in September:
1.54" - Average rainfall in October:
1.89" - Average rainfall in November:
2.48" - Average rainfall in December:
2.01"
The wettest month (with the highest rainfall) is January (2.56").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days
Sequim, WA
- Average rainfall days in January:
16.1 days - Average rainfall days in February:
16.2 days - Average rainfall days in March:
19.8 days - Average rainfall days in April:
17.3 days - Average rainfall days in May:
13.7 days - Average rainfall days in June:
12.7 days
- Average rainfall days in July:
9.2 days - Average rainfall days in August:
6.8 days - Average rainfall days in September:
12.9 days - Average rainfall days in October:
14.8 days - Average rainfall days in November:
18.2 days - Average rainfall days in December:
16.4 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.8 days).
Average snowfall
Sequim, WA
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Sequim, WA
- Average snowfall days in January:
1.3 days - Average snowfall days in February:
2.8 days - Average snowfall days in March:
1.1 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.6 days - Average snowfall days in December:
1 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Sequim, WA
- Average daylight in January:
8h and 54min - Average daylight in February:
10h and 18min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 12min - Average daylight in June:
16h and 0min
- Average daylight in July:
15h and 36min - Average daylight in August:
14h and 12min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 18min - Average daylight in December:
8h and 24min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in January:
4h and 42min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 12min - Average sunshine in May:
9h and 36min - Average sunshine in June:
9h and 48min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
11h and 0min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 54min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Sequim, WA
- Average sunshine days in January:
12.7 days - Average sunshine days in February:
9.5 days - Average sunshine days in March:
8.9 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
15.2 days - Average sunshine days in June:
14.3 days
- Average sunshine days in July:
20 days - Average sunshine days in August:
21.4 days - Average sunshine days in September:
14.8 days - Average sunshine days in October:
15.2 days - Average sunshine days in November:
10.5 days - Average sunshine days in December:
12.5 days
The month with the most sunshine days is August (21.4 days).
The month with the least sunshine days is March (8.9 days).
Average UV index
Sequim, WA
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Sequim, WA
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility
Sequim, WA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
