Mercer Island Weather Conditions
Current Temperature Level
23 °C
20 AQI
Air quality index is: Good
Last Updated: 2025-08-08 14:00 (Local Time)
MapMercer Island
Mercer Island Weather Parameters
8 km/h
3 m/s
344° NNW
0 %
16 km
0 mm
1023 mb
UV Index7
Suggestions for
TodayMercer Island8 Aug.
Umbrella• Optional
Clothing• Layering Must
Driving• Enjoy Driving
Sunscreen• ApplyTrending in United States
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Mercer Island 10-Days Weather Forecast
Today
19°C
66 %Saturday
19°C67 %Sunday
22°C70 %Monday
23°C68 %Tuesday
21°C66 %Wednesday
19°C69 %Thursday
17°C75 %Friday
16°C79 %Saturday
15°C88 %Sunday
18°C72 %Sunny
Clear Sky with temperature at 19 °C and humidity will be at 66% with 12.6 km/h winds.27°C / 14°C
Humi.66 %
Prec.0 mm
Sunrise
05:57 AM14hrs 35min
Sunset
08:32 PMTime
Condition
Temp
Humidity
UV
Wind Speed & Dir.
12 AM
Partly Cloudy
17 °C
73 %
0
2.2 kmph / NNE
Partly Cloudy 
Feels 16.7 °C
Cover 45 %
Visibility 10 km
1 AM
Partly Cloudy
16 °C
76 %
0
2.5 kmph / NE
Partly Cloudy Feels 15.8 °C
Cover 57 %
Visibility 10 km
2 AM
Clear
15 °C
81 %
0
3.6 kmph / NE
Clear Feels 15.2 °C
Cover 21 %
Visibility 10 km
3 AM
Clear
15 °C
82 %
0
2.2 kmph / NE
Clear Feels 14.9 °C
Cover 20 %
Visibility 10 km
4 AM
Clear
14 °C
82 %
0
1.4 kmph / ENE
Clear Feels 14.5 °C
Cover 21 %
Visibility 10 km
5 AM
Partly Cloudy
14 °C
83 %
0
1.8 kmph / ENE
Partly Cloudy Feels 14.3 °C
Cover 27 %
Visibility 10 km
6 AM
Partly Cloudy
14 °C
85 %
0
1.1 kmph / NE
Partly Cloudy Feels 14 °C
Cover 26 %
Visibility 10 km
7 AM
Sunny
14 °C
85 %
0.2
1.1 kmph / ENE
SunnyFeels 15 °C
Cover 24 %
Visibility 10 km
8 AM
Partly Cloudy
15 °C
80 %
0.9
0 kmph / NNE
Partly Cloudy Feels 15.7 °C
Cover 30 %
Visibility 10 km
9 AM
Partly Cloudy
17 °C
73 %
2
0.7 kmph / N
Partly Cloudy Feels 16.8 °C
Cover 30 %
Visibility 10 km
10 AM
Sunny
18 °C
67 %
3.7
2.5 kmph / NNW
SunnyFeels 18.4 °C
Cover 25 %
Visibility 10 km
11 AM
Sunny
21 °C
62 %
5.5
4 kmph / N
SunnyFeels 20.9 °C
Cover 14 %
Visibility 10 km
12 PM
Sunny
23 °C
58 %
6.9
5.4 kmph / NNW
SunnyFeels 23.7 °C
Cover 0 %
Visibility 10 km
1 PM
Sunny
24 °C
54 %
7.5
6.5 kmph / NNW
SunnyFeels 25.1 °C
Cover 0 %
Visibility 10 km
2 PM
Sunny
23 °C
48 %
7.2
7.9 kmph / NNW
SunnyFeels 26.1 °C
Cover 0 %
Visibility 16 km
3 PM
Sunny
26 °C
49 %
5.9
10.1 kmph / NNW
SunnyFeels 26.1 °C
Cover 0 %
Visibility 10 km
4 PM
Sunny
26 °C
47 %
4.2
11.9 kmph / N
SunnyFeels 26.7 °C
Cover 3 %
Visibility 10 km
5 PM
Sunny
25 °C
47 %
2.5
12.6 kmph / N
SunnyFeels 25.8 °C
Cover 1 %
Visibility 10 km
6 PM
Partly Cloudy
24 °C
48 %
1.1
12.6 kmph / N
Partly Cloudy Feels 25.2 °C
Cover 50 %
Visibility 10 km
7 PM
Cloudy
22 °C
52 %
0.3
11.2 kmph / N
Cloudy Feels 23 °C
Cover 71 %
Visibility 10 km
8 PM
Overcast
21 °C
56 %
0
10.4 kmph / N
Overcast Feels 20.8 °C
Cover 100 %
Visibility 10 km
9 PM
Partly Cloudy
20 °C
61 %
0
7.6 kmph / NNE
Partly Cloudy Feels 19.5 °C
Cover 50 %
Visibility 10 km
10 PM
Clear
18 °C
66 %
0
6.8 kmph / NNE
Clear Feels 18.4 °C
Cover 4 %
Visibility 10 km
11 PM
Clear
17 °C
71 %
0
5.8 kmph / NE
Clear Feels 17.4 °C
Cover 3 %
Visibility 10 km
Today
19°C66 %Saturday
19°C67 %Sunday
22°C70 %Monday
23°C68 %Tuesday
21°C66 %Wednesday
19°C69 %Thursday
17°C75 %Friday
16°C79 %Saturday
15°C88 %Sunday
18°C72 %Temp26 °C
ConditionSunny
Humidity49 %
Feels26.1 °C
Cover0 %
Visibility10 km
Wind Speed & Dir.10.1 kmph / NNW
UV5.9
Mercer Island 30-Days (August 2025) Weather Forecast
Sun.
Mon.
Tue.
Wed.
Thu.
Fri.
Sat.
1Fri.
27°17 °C
2Sat.
21°16 °C
3Sun.
20°16 °C
4Mon.
21°16 °C
5Tue.
24°16 °C
6Wed.
23°16 °C
7Thu.
24°14 °C
8Today
26°14 °C
9Sat.
26°14 °C
10Sun.
30°15 °C
11Mon.
31°16 °C
12Tue.
30°15 °C
13Wed.
23°14 °C
14Thu.
25°12 °C
15Fri.
26°12 °C
16Sat.
27°13 °C
17Sun.
27°13 °C
18Mon.
23°14 °C
19Tue.
24°11 °C
20Wed.
24°11 °C
21Thu.
25°11 °C
22Fri.
25°14 °C
23Sat.
25°13 °C
24Sun.
25°13 °C
25Mon.
26°13 °C
26Tue.
25°13 °C
27Wed.
26°13 °C
28Thu.
26°14 °C
29Fri.
24°13 °C
30Sat.
23°13 °C
31Sun.
22°13 °C
AugustWeather Overview
No. of days:
Sunny
10
Cloudy
3
Rainy
14
Snowy
0
The monthly weather averages in Mercer Island consist of 10 sunny days, 3 cloudy days, 14 rainy days, and 0 snowy days.
Mercer Island's Locations Weather Conditions
United States's Hottest Cities - August 2025
1.
Boulder City, United States
Sunny
4%
10.4
37.8 kmph / WSW
2.
Blythe, United States
Sunny
25%
10.3
25.2 kmph / SSW
3.
Buckeye, United States
Sunny
17%
10.5
18.4 kmph / SW
4.
Westmorland, United States
Partly cloudy
23%
10.2
19.1 kmph / SSE
5.
Brawley, United States
Partly cloudy
23%
10.2
19.1 kmph / SSE
6.
Calexico, United States
Partly cloudy
23%
10.3
18.4 kmph / SE
7.
El Centro, United States
Partly cloudy
23%
10.3
16.6 kmph / SE
8.
Salton City, United States
Sunny
30%
10.4
5.4 kmph / SE
9.
Calipatria, United States
Partly cloudy
23%
10.2
19.1 kmph / SSE
10.
Surprise, United States
Sunny
18%
10.5
14 kmph / SW
Last Updated: 08 Aug 2025, 09:25 PM
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