Climate and monthly weather forecast
Bothell, WA

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The climate of Bothell

Bothell, nestled in Washington, USA, is characterized by a Csb climate, according to the Köppen climate classification: a Mediterranean climate yet with a warm summer. Elevation and proximity to water bodies influence Bothell's weather patterns significantly.

Throughout the entire year, this city witnesses mild variations in temperature. The highest temperatures are experienced in July and August, with the thermometer reaching up to 74.8°F (23.8°C), while the coldest month is January, recording an average low of 35.1°F (1.7°C). Interestingly, Bothell experiences more rainfall than snowfall. The annual average rainfall varies from a low of 0.43" (11mm) in July to a high of 2.87" (73mm) in January. It's significant to note that the city's snowfall is almost negligible, ranging from 0.04" (1mm) to 1.42" (36mm) between January and March.

Although Bothell has high relative humidity throughout the year, a slight decrease during summer months is observed, from 85% in February to 71% in July. Furthermore, average wind speeds maintain a steady range from 3.4mph (5.5km/h) to 5.3mph (8.5km/h) across the year. When it comes to sunshine hours, the longest days with maximum sunlight exposure are in June, July and August, providing residents with 10.5 hours to 10.7 hours of sunshine.

The best time to visit Bothell

The ideal time to travel to Bothell depends largely on individual preferences for weather conditions. However, those seeking high temperatures and maximum sunshine should consider visiting between June and August. During these months, high temperatures can reach around 74.8°F (23.8°C), coupled with an impressive 10.7 hours of sunshine. Moreover, the relative humidity is at its lowest, averaging 71%, making this period comfortable for various outdoor activities.

The worst time to visit Bothell

Traveling to Bothell might be challenging between December and February. These are the coldest months, with average low temperatures dropping to 35.8°F (2.1°C) in January, accompanied by high relative humidity, averaging 85% in December and February. Moreover, there is a noticeable increase in the number of rainfall days during these months, reaching up to 17.9 days in November.

Spring weather in Bothell

Spring in Bothell, which extends from March to May, introduces warmer temperatures and reduced rainfall. The temperatures gradually rise from 50.2°F (10.1°C) in March to 63.7°F (17.6°C) in May. Simultaneously, average rainfall decreases consistently from 2.17" (55mm) in March to 1.34" (34mm) in May. The season is also characterized by an increase in daylight hours with May boasting 15.2 hours of daylight.

Summer weather in Bothell

Summer arrives in Bothell with warmer temperatures, extended daylight, and the least rainfall. Spanning June to August, summer sees temperatures peaking at 74.8°F (23.8°C) in August, while rainfall is minimal, measuring only 0.43" (11mm) in July. However, one should also expect longer sunshine hours, peaking at 10.7 hours in August.

Autumn weather in Bothell

Autumn in Bothell witnesses a gradual cooling of temperatures and increased rainfall. September through November see temperatures gradually drop from 68.7°F (20.4°C) to 48.4°F (9.1°C). Rainfall begins to escalate during this period, eventually reaching 2.83" (72mm) in November. Average sunshine hours also reduce to 4.7 hours by November.

Winter weather in Bothell

Winter in Bothell ushers in the coldest temperatures of the year, increased precipitation, and shorter daylight hours. December through February brings an average low temperature of 35.8°F (2.1°C) in January. Rainfall is also high during this season with an average of 2.76" (70mm) in December. Additionally, daylight hours tend to be shorter, averaging 8.5 hours in December.

Weather in January

In Bothell, Washington, frigid temperatures dominate the start of the year, a sharp contrast with the coming spring. Residents may experience ground frost and other freezing conditions. A notable feature of January is a relatively high average relative humidity of 85%. Weather in January »

Weather in February

A typical February in Bothell is characterized by a subtle increase in daily temperatures, alongside a gradual decrease in humidity levels. The shift from January reflects the slow transition from wintry cold to a more spring-like climate. Weather in February »

Weather in March

March ushers in a perceivable shift towards a warmer climate in Bothell. It paints a more vibrant picture than the grey winter with longer daylight hours and the invigorating aroma of budding flora. Notably, this month presents an average maximum daytime temperature of 50.2°F (10.1°C). Weather in March »

Weather in April

April in Bothell signifies the full-fledged arrival of spring, bidding adieu to the cold, snow-kissed winter landscape. The vivid hues of blooming flowers, complemented by the soft chirping of birds, epitomize this season. This month stands out with a fresh average low temperature of 39.9°F (4.4°C). Weather in April »

Weather in May

May brings a refreshing change in climate, with the Bothell terrain transitioning towards summer. Trees in full bloom, gentle breezes, and growing daylight hours mark the month. A unique characteristic of May is the minimal rainfall with an average of 1.34" (34mm). Weather in May »

Weather in June

In June, Bothell, Washington welcomes the comfortable warmth of summer. It exhibits blues skies, longer days, and a spike in outdoor activities. This month's weather distinctly showcases a maximum temperature climbing to 68°F (20°C). Weather in June »

Weather in July

July signifies the peak of the summer season in Bothell. This time of year marks outdoor barbecues, leisurely dips in the lake, and enjoying sunny afternoons in tree-shaded parks. A notable feature in July is the highest average temperature of the year, reaching 74.7°F (23.7°C). Weather in July »

Weather in August

In Bothell, August continues to uphold the summer spirit. People can enjoy warm, sunlit days, even as daily temperatures begin to fall subtly. It carries the reputation for being the driest month, receiving only an average of 0.55" (14mm) of rainfall. Weather in August »

Weather in September

September in Bothell characterizes the onset of autumn, with summer's warmth gradually fading into the cooler embrace of fall. The landscape curiously blends the green of lingering summer with auburn hints of impending autumn. Weather in September »

Weather in October

October paints a quintessential autumn scene in Bothell. The city turns into a canvas of oranges, yellows, and reds, complete with crisp fall weather. A highlight of October's weather data shows an increase in rainfall to 2.32" (59mm). Weather in October »

Weather in November

November in Bothell ushers in a cooler climate, hinting at the approaching winter season. The town witnesses the last shades of fall as the climate starts lowering its temperatures. Among the monthly parameters, there is a significant resurgence in relative humidity, averaging 84%. Weather in November »

Weather in December

The festive month of December in Bothell marks the return of winter. It greets residents with holiday decorations, snowy landscapes, and a delightful Christmas-season vibe. A key attribute of December, the lowest monthly maximum temperature amounting to 42.6°F (5.9°C), is worth noting. Weather in December »
Updated: Jul 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the most humid month?

With an average relative humidity of 85%, January is the most humid month.

What is the wettest month?

The month with the most rainfall is January, when the rain falls for 16.9 days and typically aggregates up to 2.87" (73mm) of precipitation.

How much does it rain?

Throughout the year, there are 166.9 rainfall days, and 21.93" (557mm) of precipitation is accumulated.

When does it snow?

Months with snowfall are January through April, November and December.

How much does it snow?

In Bothell, during the entire year, snow falls for 6.6 days and aggregates up to 2.6" (66mm) of snow.

What are the months with the least sunshine?

January and December, with an average of 4.4h of sunshine, are months with the least sunshine.

When is the lowest UV index?

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?

The month with the most snowfall is February, when snow falls for 2.5 days and typically aggregates up to 1.42" (36mm) of snow.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 Bothell, snow does not fall in May through October.

When are the longest days?

With an average of 15h and 54min of daylight, June has the longest days of the year.

When is the highest UV index?

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?

The least humid month is July, with an average relative humidity of 71%.

What is the driest month?

The month with the least rainfall is July, when the rain falls for 8 days and typically collects 0.43" (11mm) of precipitation.

What month is the hottest?

August, recognised by an average high temperature of 74.8°F (23.8°C) and a low of 53.1°F (11.7°C), is Bothell's warmest month.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 10.7h of sunshine.

What part of the year is the coldest?

December is the coldest month, with the temperature often reaching an average high of 42.6°F (5.9°C) and an average low of 35.1°F (1.7°C).

What is the month with the shortest days?

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

Average temperature
Bothell, WA

Average temperature - Bothell, WA

The warmest month (with the highest average high temperature) is August (74.8°F).
The month with the lowest average high temperature is December (42.6°F).

The month with the highest average low temperature is August (53.1°F).
The coldest months (with the lowest average low temperature) are February and December (35.1°F).

Average pressure
Bothell, WA

Average pressure - Bothell, WA

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

Average wind speed
Bothell, WA

Average wind speed - Bothell, WA

The windiest months (with the highest average wind speed) are January and March (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).

Average humidity
Bothell, WA

Average humidity - Bothell, WA

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (71%).

Average rainfall
Bothell, WA

Average rainfall - Bothell, WA

The wettest month (with the highest rainfall) is January (2.87").
The driest month (with the least rainfall) is July (0.43").

Average rainfall days
Bothell, WA

Average rainfall days - Bothell, WA

The month with the highest number of rainy days is November (17.9 days).
The month with the least rainy days is August (6.9 days).

Average snowfall
Bothell, WA

Average snowfall - Bothell, WA

The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Bothell, WA

Average snowfall days - Bothell, WA

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Bothell, WA

Average daylight / Average sunshine - Bothell, WA

The month with the longest days is June (Average daylight: 15h and 54min).
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 42min).
The months with the least sunshine are January and December (Average sunshine: 4h and 24min).

Average sunshine days
Bothell, WA

Average sunshine days - Bothell, WA

The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is April (10.5 days).

Average UV index
Bothell, WA

Average UV index - Bothell, 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).

Average visibility
Bothell, WA

Average visibility - Bothell, WA

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

Bothell, Washington, USA

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