Mercer Island Weather Conditions
Current Temperature Level

18 °C

Cool

ClearFeels Like 18° CHumidity 70%

24 AQI

PM2.5 : 4PM10 : 10

Air quality index is: Good

Last Updated: 2025-08-10 04:30 (Local Time)

Map

Mercer Island

Mercer Island Weather Parameters

Wind Speed

4 km/h

Light breeze

Gust Speed

2 m/s

Direction

7° N

Cloud Cover

0 %

Visibility

16 km

Precipitation

0 mm

Pressure

1020

1021

1022

1023

1024

1025

1026

1027

1028

1029

1030

1031

1021 mb

High

940956

981

1005

Moderate

1013

1030

1046+

UV Index

UV Index0

Low

Suggestions for

TodayMercer Island

10 Aug.

Umbrella• Optional

Clothing• Layering Must

Driving• Enjoy Driving

Sunscreen• Apply

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Mercer Island 10-Days Weather Forecast

See Monthly

Today

21°C

73 %

Monday

22°C

71 %

Tuesday

24°C

56 %

Wednesday

19°C

62 %

Thursday

17°C

69 %

Friday

19°C

63 %

Saturday

19°C

65 %

Sunday

17°C

80 %

Monday

17°C

59 %

Tuesday

18°C

57 %

Today10 Aug

Sunny

Clear Sky with temperature at 21 °C and humidity will be at 73% with 14.4 km/h winds.

27°C / 16°C

Humi.73 %

Prec.0 mm

Sunrise

05:59 AM

14hrs 30min

Sunset

08:29 PM

Temperature (°C)

12 AMTime11 PM

Time

Condition

Temp

Humidity

Wind Speed & Dir.

12 AM

Clear

19 °C

75 %

6.1 kmph / NNE

Feels 19 °C

Cover 0 %

Visibility 10 km

1 AM

Clear

18 °C

80 %

4.7 kmph / NNE

Feels 18.3 °C

Cover 0 %

Visibility 10 km

2 AM

Clear

18 °C

83 %

5 kmph / N

Feels 17.8 °C

Cover 0 %

Visibility 10 km

3 AM

Clear

17 °C

85 %

4.3 kmph / N

Feels 17.2 °C

Cover 0 %

Visibility 10 km

4 AM

Clear

18 °C

70 %

4 kmph / N

Feels 16.7 °C

Cover 0 %

Visibility 16 km

5 AM

Clear

16 °C

89 %

4.3 kmph / N

Feels 16.2 °C

Cover 16 %

Visibility 10 km

6 AM

Partly Cloudy

16 °C

92 %

5.8 kmph / N

Feels 15.9 °C

Cover 29 %

Visibility 10 km

7 AM

Partly Cloudy

16 °C

93 %

0.2

5.8 kmph / N

Feels 15.9 °C

Cover 49 %

Visibility 10 km

8 AM

Partly Cloudy

16 °C

92 %

0.9

7.6 kmph / NNE

Feels 16.2 °C

Cover 56 %

Visibility 10 km

9 AM

Partly Cloudy

17 °C

91 %

2.1

9 kmph / N

Feels 17.1 °C

Cover 56 %

Visibility 10 km

10 AM

Partly Cloudy

20 °C

85 %

3.9

10.8 kmph / N

Feels 19.8 °C

Cover 43 %

Visibility 10 km

11 AM

Sunny

22 °C

72 %

5.7

11.5 kmph / N

Feels 23.7 °C

Cover 0 %

Visibility 10 km

12 PM

Sunny

24 °C

64 %

7.2

11.9 kmph / N

Feels 25.6 °C

Cover 0 %

Visibility 10 km

1 PM

Sunny

26 °C

60 %

7.9

13 kmph / N

Feels 27 °C

Cover 0 %

Visibility 10 km

2 PM

Sunny

27 °C

56 %

7.5

13.7 kmph / N

Feels 27.7 °C

Cover 0 %

Visibility 10 km

3 PM

Sunny

27 °C

55 %

6.3

14.4 kmph / N

Feels 28 °C

Cover 0 %

Visibility 10 km

4 PM

Sunny

27 °C

54 %

4.5

13.7 kmph / N

Feels 28.2 °C

Cover 0 %

Visibility 10 km

5 PM

Sunny

27 °C

54 %

2.6

13.7 kmph / N

Feels 27.6 °C

Cover 0 %

Visibility 10 km

6 PM

Sunny

26 °C

58 %

1.2

13.3 kmph / N

Feels 27.1 °C

Cover 0 %

Visibility 10 km

7 PM

Sunny

25 °C

60 %

0.4

11.5 kmph / N

Feels 26.5 °C

Cover 0 %

Visibility 10 km

8 PM

Sunny

24 °C

62 %

7.9 kmph / N

Feels 25.9 °C

Cover 0 %

Visibility 10 km

9 PM

Clear

24 °C

67 %

6.8 kmph / NNE

Feels 25.4 °C

Cover 0 %

Visibility 10 km

10 PM

Clear

21 °C

70 %

5.8 kmph / NNE

Feels 20.9 °C

Cover 0 %

Visibility 10 km

11 PM

Clear

21 °C

79 %

5.4 kmph / N

Feels 21.1 °C

Cover 0 %

Visibility 10 km

Today

21°C

73 %

Monday

22°C

71 %

Tuesday

24°C

56 %

Wednesday

19°C

62 %

Thursday

17°C

69 %

Friday

19°C

63 %

Saturday

19°C

65 %

Sunday

17°C

80 %

Monday

17°C

59 %

Tuesday

18°C

57 %

Temp16 °C

ConditionClear

Humidity89 %

Feels16.2 °C

Cover16 %

Visibility10 km

Wind Speed & Dir.4.3 kmph / N

UV0

Mercer Island 30-Days (August 2025) Weather Forecast

See Hourly

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

8Fri.

27°14 °C

9Sat.

26°14 °C

10Today

28°16 °C

11Mon.

29°18 °C

12Tue.

28°15 °C

13Wed.

26°15 °C

14Thu.

21°15 °C

15Fri.

20°14 °C

16Sat.

17°14 °C

17Sun.

24°13 °C

18Mon.

24°10 °C

19Tue.

24°10 °C

20Wed.

25°10 °C

21Thu.

24°11 °C

22Fri.

28°11 °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

Cloudy

Rainy

Snowy

The monthly weather averages in Mercer Island consist of 10 sunny days, 2 cloudy days, 15 rainy days, and 0 snowy days.

Mercer Island's Locations Weather Conditions

Locations

Temp

Condition

Humi.

Wind Speed & Direction

Beacon Hill

18 °C

Clear

70%

4 kmph / N

United States's Hottest Cities - August 2025

Hottest

Coldest

RankCityTemperatureWeather ConditionHumidityUVWind Speed & Dir.

Spring Valley, United States

34 °C

Clear

13%

7.2 kmph / WSW

Summerlin South, United States

34 °C

Clear

13%

7.2 kmph / WSW

Tempe, United States

33 °C

Partly cloudy

35%

6.8 kmph / SE

El Centro, United States

33 °C

Clear

52%

4.7 kmph / SE

Westmorland, United States

33 °C

Clear

52%

10.4 kmph / SE

Brawley, United States

33 °C

Clear

52%

10.4 kmph / SE

Calipatria, United States

33 °C

Clear

52%

11.2 kmph / ESE

Calexico, United States

33 °C

Clear

52%

5 kmph / SE

Queen Valley, United States

32 °C

Clear

36%

5 kmph / E

10.

Apache Junction, United States

32 °C

Clear

36%

6.5 kmph / E

Last Updated: 10 Aug 2025, 11:51 AM

City Weather Rankings

Prana sense

Experience precise, real-time weather monitoring with our Automatic Weather Station, reliable source for accurate meteorological data.

Weather Station

Experience precise, real-time weather monitoring with our Automatic Weather Station, reliable source for accurate meteorological data.

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Mercer Island Weather ConditionsCurrent Temperature Level

Mercer Island Weather Parameters

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Mercer Island 10-Days Weather Forecast

Mercer Island 30-Days (August 2025) Weather Forecast

AugustWeather Overview

No. of days:

Mercer Island's Locations Weather Conditions

United States's Hottest Cities - August 2025

Prana sense

Weather Station

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Mercer Island Weather Conditions
Current Temperature Level