Climate and monthly weather forecast
Lynnwood, WA

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The climate of Lynnwood

Lynnwood is geographically positioned in Washington, the United States and boasts a Csb Köppen climate classification. The climate primarily corresponds to Mediterranean and warm summers. Looking at the annual climatic parameters on average, Lynnwood offers a blend of mild temperatures, moderate humidity and rainfall, and a fair amount of sunlight.

Throughout the year, temperatures in Lynnwood span from a low of 35.8°F (2.1°C) to a high of 73.9°F (23.3°C). December experiences the lowest temperatures while the warmest month is August. The city's relative humidity proportion remains consistent, ranging from 72% in July to 84% in December and January.

Rainfall in Lynnwood varies substantially from 0.39" (10mm) in July to 3.5" (89mm) in December. This span displays a remarkable transition between the driest and the wettest periods. In terms of snowfall, it is notably minimal, peaking at 3.58" (91mm) in February, while from May to October no snowfall period predominates.

The amount of daylight Lynnwood enjoys ranges from 8.5 hours in December to 16 hours in June, inversely proportional to the cloud cover percentage which fluctuates between 25% in August to 53% in January and December. Average wind speed varies subtly over the year, with May recording the lowest speed of 3.6mph (5.8km/h) and November the highest at 5.9mph (9.5km/h).

The best time to visit Lynnwood

The ideal time to visit Lynnwood greatly depends on the visitor's preference for specific weather conditions. However, considering the general climate throughout the year, the period from June to September proves to be the most favorable time for a visit. During this span, the city experiences its highest temperatures, least rainfall, and longest days. Additionally, the UV index, mild at 4 to 5, is perfect for outdoor activities.

The worst time to visit Lynnwood

Contrarily, if adverse weather conditions such as lower temperatures, shorter daylight hours, and maximum rainfall are less appealing, then the period from November to February may not be the ideal time to visit Lynnwood. This time of the year registers the lowest temperatures, shortest daylight hours coupled with the highest rainfall, making outdoor activities limited and less appealing.

Spring weather in Lynnwood

Spring weather in Lynnwood, from March to May, brings a gradual increase in temperature. The highs range from 50°F (10°C) in March to 62.8°F (17.1°C) by May. Low temperatures also see a steady rise, from 38.3°F (3.5°C) to 45.5°F (7.5°C) during this period. Rainfall begins to reduce, moving from 2.64" (67mm) in March to 1.57" (40mm) in May. The daylight hours increase significantly, marking the transition from winter to spring.

Summer weather in Lynnwood

Summer, extending from June to August, takes the city into its warmest and driest period. The temperatures during these months range from 67.3°F (19.6°C) to 73.9°F (23.3°C) for highs and 49.3°F (9.6°C) to 54.1°F (12.3°C) for lows. The rainfall level hits its lowest in July at 0.39" (10mm), offering sunny days with long daylight hours extending up to 16 hours in June.

Autumn weather in Lynnwood

Autumn in Lynnwood sets in during September and continues until November. This period sees a decline in temperatures with highs dropping from 67.6°F (19.8°C) in September to 48.4°F (9.1°C) in November. Rainfall begins to increase again during these months, starting at 1.42" (36mm) in September and topping at 3.35" (85mm) by November.

Winter weather in Lynnwood

December ushers in the winter season marked by chilly temperatures and shorter days. High temperatures drop to 43.3°F (6.3°C) in December and low temperatures plunge to 35.8°F (2.1°C). There is a gradual increase in rainfall, peaking at 3.5" (89mm). Snowfall is relatively minimal but it is during these months of winter that Lynnwood experiences its only snowfall for the year, from December to February. The shortest daylight duration transpires in December at 8.5 hours.

Weather in January

January in Lynnwood does not bring extreme cold, with temperatures steadfastly above freezing, offering comfortable winter days. Snowfall remains marginal with daytime hours often mild and inviting. The month showers the residents with a fair amount of rainfall. Weather in January »

Weather in February

Moving into February, Lynnwood starts gently transitioning the weather into spring, with temperatures slightly moderating, but rainfall keeps a similar pace as January. The month sees noticeably increased snowfall, up to 3.58" (91mm). Weather in February »

Weather in March

The Lynnwood weather during March is notably milder compared to the previous months. March ushers in spring with minimum rainfall and increased hours of daylight. The weather swings steadily away from the winter chills, with an average temperature hovering around 50°F (10°C). Weather in March »

Weather in April

April in Lynnwood boasts the more consistent spring weather with warmer temperatures and lowered precipitation rates. Days become longer and sunnier, showcasing April's typical springtime charm. The highlight of the month includes an average rainfall of 2.01" (51mm), marking a significant decrease from the previous months. Weather in April »

Weather in May

May marks the advent of warm weather in Lynnwood, with increasing daylight hours and less frequent showers. Pleasant weather dominates the month, indicating the proximity of summer. An annual low in rainfall, 1.57" (40mm), comes to pass in May, contributing to the delightful weather. Weather in May »

Weather in June

June signals the beginning of summer in Lynnwood with noticeably higher temperatures, longer days, and minimal rain. The weather is typically warm, but does not reach the sweltering highs of peak summer, proving comfortable for residents. Weather in June »

Weather in July

Weather in July is distinctive with the summer heat reaching its peak, and the onset of drier conditions. The longest days of the year are observed in Lynnwood in this month, often filled with warmth and rare rainfall. An impressive low in rainfall, 0.39" (10mm), makes July the driest month of the year. Weather in July »

Weather in August

August is marked by exceptional warmth and limited rainfall in Lynnwood, as it continues the July trend. The dominance of warmth and sunlight is offset by a slight rise in rainfall, but the showers remain infrequent. The total rainfall measures up to 0.51" (13mm), which is not significantly higher than the previous month. Weather in August »

Weather in September

September in Lynnwood signifies the transition from summer to fall with temperatures easing and rainfall beginning to pick up again. Despite the increment in rainfall, the weather remains quite warm and enjoyable. The fluctuations in weather leads to a notable increment in rainfall, reaching 1.42" (36mm). Weather in September »

Weather in October

October introduces the chilly weather as Lynnwood reembraces the rainy season. The increased precipitation combined with decreasing temperatures suggest clear signs of autumn. The pace of rainfall heightens, measuring 2.6" (66mm), as the region prepares for the cooler months ahead. Weather in October »

Weather in November

November sees a drastic shift towards winter, with temperatures peaking downwards and rainfall at an annual peak. This steady march towards cold is evident with gradually lowering daylight hours and a heightened average relative humidity of 83%. Weather in November »

Weather in December

December announces the arrival of winter in Lynnwood with the lowest temperatures observed during the year and frequent showers. Humidity soars high, tying with January, yielding a relative humidity of 84%, the highest of the year. Weather in December »
Updated: Feb 14, 2024 | Published by: Weather U.S. | Resources

Frequently asked questions

What is the most humid month in Lynnwood?

January, February and December, with an average relative humidity of 84%, are most humid months in Lynnwood, Washington.

How much does it rain in Lynnwood?

In Lynnwood, Washington, during the entire year, the rain falls for 173 days and collects up to 25" (635mm) of precipitation.

When does it snow in Lynnwood?

January through April, November and December are months with snowfall in Lynnwood, Washington.

How many days does it snow in Lynnwood?

In Lynnwood, Washington, during the entire year, snow falls for 12.5 days and aggregates up to 6.65" (169mm) of snow.

What is the month with the least sunshine in Lynnwood?

With an average of 4.5h of sunshine, January has the least sunshine of the year in Lynnwood, Washington.

What are the months with the lowest UV index in Lynnwood?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

When does it snow the most in Lynnwood?

February is the month with the most snowfall. Snow falls for 4.7 days and accumulates 3.58" (91mm) of snow.

When is Daylight Saving Time (DST) in Lynnwood?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Lynnwood, 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.

When it does not snow in Lynnwood?

In Lynnwood, Washington, snow does not fall in May through October.

When are the longest days in Lynnwood?

June has the longest days of the year, with an average of 16h and 0min of daylight.

What is the month with the highest UV index in Lynnwood?

The months with the highest UV index are June and July, with an average maximum UV index of 5.

What is the least humid month in Lynnwood?

July is the least humid month in Lynnwood, Washington, with an average relative humidity of 72%.

What is the driest month in Lynnwood?

The month with the least rainfall in Lynnwood is July, when the rain falls for 7.7 days and typically collects 0.39" (10mm) of precipitation.

What month is the hottest in Lynnwood?

August proves to be the warmest month in Lynnwood, Washington, recording an average peak temperature of 73.9°F (23.3°C) and a minimum temperature of 54.1°F (12.3°C).

What month has the most sunshine in Lynnwood?

August has the most sunshine of the year in Lynnwood, Washington, with an average of 10.8h of sunshine.

What are the coldest months in Lynnwood?

Lynnwood's December weather, marked by an average high temperature of 43.3°F (6.3°C) and an average low temperature of 35.8°F (2.1°C), is the coldest in the year.

What is the wettest month in Lynnwood?

The month with the most rainfall in Lynnwood is December, when the rain falls for 17.6 days and typically aggregates up to 3.5" (89mm) of precipitation.

What is the month with the shortest days in Lynnwood?

December has the shortest days of the year in Lynnwood, with an average of 8h and 30min of daylight.

Average temperature
Lynnwood, WA

Average temperature - Lynnwood, WA

The warmest month (with the highest average high temperature) is August (73.9°F).
The month with the lowest average high temperature is December (43.3°F).

The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (35.8°F).

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Average pressure
Lynnwood, WA

Average pressure - Lynnwood, WA

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

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Average wind speed
Lynnwood, WA

Average wind speed - Lynnwood, WA

The windiest month (with the highest average wind speed) is November (5.9mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).

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Average humidity
Lynnwood, WA

Average humidity - Lynnwood, WA

The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is July (72%).

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Average rainfall
Lynnwood, WA

Average rainfall - Lynnwood, WA

The wettest month (with the highest rainfall) is December (3.5").
The driest month (with the least rainfall) is July (0.39").

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Average rainfall days
Lynnwood, WA

Average rainfall days - Lynnwood, WA

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).

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Average snowfall
Lynnwood, WA

Average snowfall - Lynnwood, WA

The month with the highest snowfall is February (3.58").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
Lynnwood, WA

Average snowfall days - Lynnwood, WA

The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Lynnwood, WA

Average daylight / Average sunshine - Lynnwood, WA

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 30min).

The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

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Average sunshine days
Lynnwood, WA

Average sunshine days - Lynnwood, WA

The month with the most sunshine days is August (22.5 days).
The month with the least sunshine days is November (9.2 days).

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Average UV index
Lynnwood, WA

Average UV index - Lynnwood, WA

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average visibility
Lynnwood, WA

Average visibility - Lynnwood, WA

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

[Resources]

Lynnwood, Washington, USA

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