The climate of Sammamish
Sammamish,
Washington, USA, falls under the Csb category of the Köppen climate classification, indicating a warm summer Mediterranean climate. Geographically perched in a region of moderate climate characteristics, the city experiences mild, aloof summers and moderately cold winters, resulting in a balanced Mediterranean weather distribution throughout the year.
Analyzing the yearly climatological pattern in Sammamish, it becomes evident that the average high temperature escalates from 44.1°F (6.7°C) in
January to a peak of 76.5°F (24.7°C) in
August. In contrast, the average low temperature follows a similar trajectory, rising from 34.3°F (1.3°C) in January to 52.2°F (11.2°C) in August.
Relative humidity in Sammamish declines from 85% in January to 70% in
July, followed by a gradual rise towards the closing months of the year. The pattern of rainfall reveals a notable precipitative peak of 1.85" (47mm) in
December. It is noteworthy to mention that rainfall is present with an annual average of between 10 to 10.5 days per month from
June to
October, offering Sammamish a unique dry summer, a significant peculiarity of Csb Mediterranean climates.
The best time to visit Sammamish
To truly enrich the experience of
Sammamish, the summer season serves as a favorable time of visit. From
June to
August, the temperature averages from 64.4°F (18°C) to 76.5°F (24.7°C), coupled with a relative humidity down to 70%. Furthermore, daylight duration extends beyond 15 hours daily and sunshine up to 10.5 hours, making outdoor activities more enjoyable. Additionally, the scarce rainfall of 0.35" (9mm) per month in
July and August contributes to a dry summer, enhancing the conditions for a visit.
The worst time to visit Sammamish
On the counter side, the winter months, namely from
November to
February, might be less appealing to tourists. The mercury drops to an average of between 42.3°F (5.7°C) and 45.1°F (7.3°C). The relative humidity rises to 85% coupled with a shorter period of daylight, only around 9 hours. Additionally, the highest annual rainfall of 1.85" (47mm) in
December and a visibility of 5 miles due to the increased cloud cover of 57% can hinder outdoor activities.
Spring weather in Sammamish
Spring in
Sammamish witnesses a gradual transition in weather conditions.
March registers an average high temperature of 50°F (10°C) and an average low of 36.1°F (2.3°C). By
May, this high temperature reaches up to 64.4°F (18°C), while the low hovers around 42.6°F (5.9°C). Average rainfall in spring is between 1.3" (33mm) in March and 0.79" (20mm) in May. The city also heaves a sigh of relief with increased daylight hours, from 11.9 hours in March to 15.2 hours in May.
Summer weather in Sammamish
Sammamish's summer climate is relatively pleasant with moderate heat. The temperature swings between a pleasant 69.3°F (20.7°C) in
June and a warm 76.5°F (24.7°C) in
August. Nights remain comfortable with a low ranging from 46.4°F (8°C) to 52.2°F (11.2°C). Summer also sees a drop in precipitation to as low as 0.35" (9mm) in
July and August.
Autumn weather in Sammamish
Autumn in
Sammamish marks the transition from summer to winter.
September bears a high temperature of 69.8°F (21°C) that drops to 48.2°F (9°C) by
November. Nights during autumn get cooler, with the mercury falling from 48.9°F (9.4°C) in September to 38.3°F (3.5°C) in November. Rainfall begins to rise in this period, from 1.06" (27mm) in September to 1.54" (39mm) in November.
Winter weather in Sammamish
Winter in
Sammamish, from
December to
February, is moderately cold. High temperatures in winter months hover between 42.3°F (5.7°C) and 45.1°F (7.3°C), while the average lows stay between 33.6°F (0.9°C) and 34.3°F (1.3°C). Heavy rainfall is prominent in December, with an average rain measurement of 1.85" (47mm). Snowfall is infrequent, with an average of 0.35" (9mm) in December and below 1.38" (35mm) in February. The shortest daylight period is in December with only 8.5 hours, supported by 4.2 hours of sunshine.
Weather in January
The start of a new year in
Sammamish,
Washington brings along colder temperatures, making it one of the more chillier months in this region. The average low temperatures revolve around 34.3°F (1.3°C) and the high around 44.1°F (6.7°C).
Weather in January »Weather in February
February witnesses a slight increase in temperature marking a subtle transition towards spring. However, the distinction is noticeable with February experiencing significantly higher snowfall - a total of 1.38" (35mm) in the month, almost double than
January, indicating a strong winter still in effect.
Weather in February » Weather in March
Weather in
March is characterised by a considerable rise in temperatures. As compared to
February, the amount of snowfall drastically falls, indicating the retreat of winter and the arrival of spring. Although rainfall continues its steady course with minor variations from February, the amount of snowfall reduces to 0.63" (16mm) this month, a testament to the waning winter season.
Weather in March »
Weather in April
As the community transitions from winter to spring,
April showcases moderate increase in temperatures as compared to
March. The city witnesses no snowfall during this month, signalling the complete retreat of winter. Humidity makes a noticeable dip to 80% from the beginning of the year, marking a decrease in moisture levels in the atmosphere.
Weather in April »Weather in May
May offers a marked departure from the cooler temperatures of spring to the incoming warmth of summer. As
Sammamish transitions into a warmer season, the city experiences a maximum temperature of 64.4°F (18°C). This change in climate is also seen in the declining rainfall, which is at its second lowest in the year.
Weather in May » Weather in June
Weather in
June defines the commencement of summer in
Sammamish, with temperatures reaching an average high of 69.3°F (20.7°C). The city welcomes its longest days in June, with daylight lasting approximately 15.9 hours providing plenty of time for outdoor activities.
Weather in June »
Weather in July
July is renowned for hosting the highest temperatures in
Sammamish, marking the peak of summer with an average peak of 76.1°F (24.5°C). This summertime heat is partly offset by the lowest levels of humidity found throughout the year, standing at 70%.
Weather in July » Weather in August
Continuing the summer trend from
July,
August in
Sammamish is characterized by warm weather conditions, with minimal variation in the maximum recorded temperature. The amount of rainfall further dips to just 0.35" (9mm), tying with July for the least amount in any month.
Weather in August »Weather in September
September marks a transition period in
Sammamish with the city moving from hot summer months towards cooler Fall. Despite the average temperatures starting to decrease, the city still enjoys a maximum of a balmy 69.8°F (21°C).
Weather in September »
Weather in October
October witnesses a more visible transition towards colder weather in
Sammamish. There is a significant drop in maximum temperatures as compared to
September, alluding to a chilly autumn. October sees a rise in rainfall compared to the previous month with a total of 1.46" (37mm) indicating the increasing humidity.
Weather in October » Weather in November
November in
Sammamish is distinctly cooler, confirming the onset of winter. With the average maximum temperature dipping to 48.2°F (9°C), the chilly weather begins to take hold. Interestingly, this month sees the city's highest rainfall at 1.54" (39mm), highest in the year, confirming the wintery conditions.
Weather in November » Weather in December
December marks the pinnacle of winter in
Sammamish, characterised by the year’s lowest average temperature, falling to 33.6°F (0.9°C). The season brings forth a mild amount of snowfall, with the city receiving 0.35" (9mm) in December, creating a white winter spectacle.
Weather in December »