Lake Washington Water Temperature

The City of Seattle is in the State of Washington and home to Lake Washington in King County. The City is a serene evergreen environment, surrounded by Cascade Mountains to the east, Olympic Mountains to the west, Mount Rainier to the South and Mt. Baker to the North.


Seattle is also home to the marvellous Space Needle and the Pike Market, the oldest farmers market in the U.S where you can shop and see many attractions.

Lake Washington is a town close to Lake Washington. August is the month with the warmest water temperature at 69.1°F / 20.6°C. The coolest month is January with an avg. water temperature of 39°F / 3.9°C. July is the sunniest at 0in / 0mm and December the wettest month with 2.4in / 60.3mm. The average air temperature is around 65.8°F / 18.8°C, August is the hottest month in a year. December is the coolest with 39°F / 3.9°C average air temperature. temperate climate with warm and dry summer would be the climate here. June, July, August, September would be the best time to visit.

Lake Washington Summary

Description Value
Warmest Month Water Temperature: August with 69.1°F / 20.6°C
Coldest Month Water Temperature: January with 39°F / 3.9°C
Warmest Month Air Temperature: August with 65.8°F / 18.8°C
Coldest Month Air Temperature: December with 39°F / 3.9°C
Wettest Month: December with 2.4in / 60.3mm
Driest Month: July with 0in / 0mm
Highest Humidity January with 84.6%
Lowest Humidity July with 67.1%
Best Time to Visit: June, July, August, September
Climate Classification temperate climate with warm and dry summer

Lake Washington water temperature by month

Lake Washington water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

39.6 39 38.8

February

39.4 39.2 38.8

March

42.8 40.8 39.4

April

49.3 45.7 43

May

59.2 53.8 49.3

June

65.1 60.4 57

July

71.1 65.7 61.3

August

70.9 66.7 63.3

September

66 61.7 57.2

October

59.5 54.3 50

November

50.4 47.1 43.9

December

43.7 41.4 39.7

Lake Washington water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

4.2 3.9 3.8

February

4.1 4 3.8

March

6 4.9 4.1

April

9.6 7.6 6.1

May

15.1 12.1 9.6

June

18.4 15.8 13.9

July

21.7 18.7 16.3

August

21.6 19.3 17.4

September

18.9 16.5 14

October

15.3 12.4 10

November

10.2 8.4 6.6

December

6.5 5.2 4.3

The highest water temperature will be reached in August with around 69.1°F / 20.6°C. The lowest in January with an average water temperature of 39°F / 3.9°C.

Lake Washington is the place to explore during the summer. Seattle’s weather is mostly wet but summer months from July to September are extremely hot with temperatures ranging between 70˚F and 90˚F, a good time to be around water. Fly into the Seattle Tacoma International airport and get to and around the City by train, bus or van shuttles as well as taxis and rental cars. If you would rather, cycle to experience slow leisurely sightseeing.


Lake Washington weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Jan. 21
Overcast clouds
39 °F
32°F
4 °C
0°C
3mph (4km/h)
southwest
0in (0mm)
0 %
78%
Jan. 22
Light snow
34 °F
27°F
1 °C
-3°C
2mph (3km/h)
west
0in (0mm)
50 %
90%
Jan. 23
Few clouds
35 °F
21°F
1 °C
-6°C
1mph (2km/h)
west
0in (0mm)
0 %
59%
Jan. 24
Overcast clouds
47 °F
24°F
8 °C
-4°C
1mph (2km/h)
east-southeast
0in (0mm)
25 %
60%
Jan. 25
Moderate rain
45 °F
37°F
7 °C
3°C
1mph (2km/h)
south
0in (10mm)
90 %
98%
Jan. 26
Light snow
39 °F
27°F
4 °C
-3°C
2mph (3km/h)
north-northeast
0in (3mm)
90 %
86%
Jan. 27
Snow
33 °F
25°F
1 °C
-4°C
3mph (4km/h)
northeast
0in (8mm)
95 %
71%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Jan. 28
Light snow
37 °F
17°F
3 °C
-8°C
2mph (2km/h)
southwest
0in (3mm)
90 %
79%
Jan. 29
Scattered clouds
48 °F
18°F
9 °C
-8°C
1mph (1km/h)
south-southeast
0in (0mm)
0 %
83%
Jan. 30
Broken clouds
42 °F
25°F
5 °C
-4°C
1mph (2km/h)
south
0in (0mm)
0 %
84%
Jan. 31
Light rain
32 °F
39°F
0 °C
4°C
4mph (6km/h)
south
0in (6mm)
85 %
92%
Feb. 01
Overcast clouds
39 °F
30°F
4 °C
-1°C
2mph (3km/h)
west-southwest
0in (0mm)
20 %
81%
Feb. 02
Broken clouds
44 °F
26°F
7 °C
-3°C
2mph (3km/h)
west
0in (0mm)
0 %
79%
Feb. 03
Light snow
32 °F
24°F
0 °C
-5°C
2mph (4km/h)
west-northwest
0in (0mm)
40 %
70%
Feb. 04
Few clouds
39 °F
21°F
4 °C
-6°C
1mph (2km/h)
southwest
0in (0mm)
0 %
63%
Feb. 05
Overcast clouds
46 °F
31°F
8 °C
-1°C
2mph (3km/h)
south-southwest
0in (0mm)
25 %
65%

Lake Washington weather by month / climate table

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

48.2 39.6 31.8 0.5 12 84.6%

February

48.9 39.9 32.5 0.3 9 80.8%

March

55.6 43.3 34.3 1 16 79.2%

April

61.7 47.7 36.5 0.5 10 76.2%

May

66.6 54 41.5 0.2 1 73.7%

June

73.2 59.2 49.5 0.2 0 71.7%

July

79 65.3 54 0 0 67.1%

August

79.5 65.8 54.7 0 0 67.6%

September

73.4 59.7 49.1 0 0 74.7%

October

63.9 51.4 41.4 0.1 0 81.8%

November

53.6 43.9 34.3 0.6 15 83.9%

December

45.9 39 33.3 2.4 12 84.1%

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

9 4.2 -0.1 13.9 12 84.6%

February

9.4 4.4 0.3 6.8 9 80.8%

March

13.1 6.3 1.3 25.1 16 79.2%

April

16.5 8.7 2.5 12.2 10 76.2%

May

19.2 12.2 5.3 4.1 1 73.7%

June

22.9 15.1 9.7 4.2 0 71.7%

July

26.1 18.5 12.2 0 0 67.1%

August

26.4 18.8 12.6 0 0 67.6%

September

23 15.4 9.5 0 0 74.7%

October

17.7 10.8 5.2 2.6 0 81.8%

November

12 6.6 1.3 14.6 15 83.9%

December

7.7 3.9 0.7 60.3 12 84.1%
The hottest avg. temperature is around 65.8°F / 18.8°C, August is the month with the highest temperature. December is the coolest with 39°F / 3.9°C average temperature. July is the month with the lowest precipitation of 0in / 0mm and December with the maximum precipitation in a year with 2.4in / 60.3mm.

Activities around Lake Washington

The summer weather makes the Lake very conducive for swimming with the water temperatures ranging around 70˚F during the summer months. Other activities you can involve yourself in while there include, driving on the Floating Bridge, the longest in the world, over Lake Washington, sail on the lake in a rental boat or cruise in a speedboat and watch salmon swim upstream at the “Fish Ladder”. The Lake is also surrounded by magnificent beautiful homes to see, among them being Bill Gates home.

Activities & POI in Lake Washington

Type of Activity List
Beach Madison Park Beach, North Beach, Mercerwood Shore Club beach, Mercer Island Beach Club Beach, Bay Street End, East Harrison Street End, South Holgate Street End, Lake Union Park Kayak Launch and Beach, Pritchard Island Beach, Mount Baker Beach, Magnuson Park Beach, Road End Beach
Marina for Sailing, Boat adventures, fishing Leschi Moorage, Second Avenue South Dock, Kirkland Marina, Leschi Yacht Basin, Bell Street Marina, Queen City Yacht Club, Seattle Yacht Club, Lake Union SkyLaunch, Harbor Island Marina, Puget Sound Yacht Club, Seattle Marina, Meydenbauer Bay Yacht Club, Newport Yacht Club, Waterfront Activities Center, AGC Marina, Gas Works Park Marina, Spinnaker Bay Marina, Parkshore Marina, Dunato's Marina, Lakewood Moorage, Newport Yacht Basin, Carillon Point, Boat Street Marina, Lake Union Waterworks, Fremont Tug & Boat Co., Affinity Marina, Sea Scout Base Lake Union, Tyee Yacht Club, Yarrow Bay Marina
Attraction Underground Tour, Seattle Great Wheel, Mystery Coke Machine, Gum Wall, Spooked in Seattle, Sky View Observatory, Public Market Clock, Sanitary Market Building, Three Brick Monoliths, Roll Call, Wings over Washington, Comedy Underground, Smith Tower Observatory, Microsoft Visitor Center, Xanadu 2.0, Seattle Escape Games, Seattle Gum Wall, Harry Partch Instrumentarium, Seattle Center, Space Needle, Washington State Convention Center, Central Library, Pioneer Square, Pioneer Square Pergola, Japanese Garden, Ride the Ducks, Lotus, Swiftsure (LV-83), Arthur Foss, Virginia V, Twilight, Starbucks Reserve Roastery and Tasting Room, Bell Harbor Conference Center, Argosy Cruises, MV Skansonia, Duwamish, Discovery, Pike Place Market, The Carousel, Seattle Glassblowing Studio, Argosy Cruises - Lake Union
Golf Course The Bellevue Golf Course, Crossroads Par 3 Golf Course, Sand Point Country Club, Overlake Golf & Country Club, Jefferson Park Golf Course, Driving Range, Broadmoor Golf Course, Glendale Country Club, University of Washington Golf Driving Range
Caravan Site Trailer Inns of Bellevue

Picture Copyright: Flickr CC 2.0 ChrisYunker

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