Mercer Island Weather Conditions
Current Temperature Level

17 °C

Cool

Partly cloudyFeels Like 17°CHumidity 67%

55 AQI

PM2.5 : 11PM10 : 11

Air quality index is: Moderate

Last Updated: 2025-10-04 13:30 (Local Time)

Map

Mercer Island

Mercer Island Weather Parameters

Wind Speed

6 km/h

Light breeze

Gust Speed

2 m/s

Direction

2° N

Cloud Cover

75 %

Visibility

16 km

Precipitation

0 mm

Pressure

1020

1021

1022

1023

1024

1025

1026

1027

1028

1029

1030

1031

1020 mb

High

940956

981

1005

Moderate

1013

1030

1046+

UV Index

UV Index2

Low

Suggestions for

TodayMercer Island

4 Oct.

Hydration• Stay Hydrated

Clothing• More Layered

Driving• Drive Safely

Sunscreen• Apply

Trending in United States

Air Quality Monitoring for Logistics: Smarter Deliveries with Data

Mercer Island 10-Days Weather Forecast

See Monthly

Today

14°C

85 %

Sunday

13°C

68 %

Monday

15°C

51 %

Tuesday

16°C

50 %

Wednesday

13°C

71 %

Thursday

13°C

72 %

Friday

13°C

71 %

Saturday

13°C

71 %

Sunday

12°C

87 %

Monday

11°C

83 %

Today4 Oct

Overcast

Fully overcast skies with a high of 14 °C. Humidity will be 85%, and winds at 11.9 km/h.

19°C / 11°C

Humi.85 %

Prec.0 mm

Sunrise

07:13 AM

11hrs 29min

Sunset

06:42 PM

Temperature (°C)

12 AMTime11 PM

Time

Condition

Temp

Humidity

Wind Speed & Dir.

12 AM

Overcast

13 °C

84 %

3.2 kmph / NE

Feels 12.9 °C

Cover 94 %

Visibility 10 km

1 AM

Clear

13 °C

84 %

2.9 kmph / NNE

Feels 13.2 °C

Cover 4 %

Visibility 10 km

2 AM

Partly Cloudy

13 °C

86 %

4 kmph / NNE

Feels 13.2 °C

Cover 27 %

Visibility 10 km

3 AM

Partly Cloudy

13 °C

87 %

2.9 kmph / NNE

Feels 13.1 °C

Cover 59 %

Visibility 10 km

4 AM

Cloudy

13 °C

88 %

2.2 kmph / NE

Feels 13 °C

Cover 82 %

Visibility 10 km

5 AM

Overcast

13 °C

85 %

1.8 kmph / ENE

Feels 12.7 °C

Cover 88 %

Visibility 10 km

6 AM

Overcast

13 °C

85 %

1.8 kmph / NE

Feels 12.7 °C

Cover 100 %

Visibility 10 km

7 AM

Overcast

13 °C

90 %

1.1 kmph / NNE

Feels 13 °C

Cover 100 %

Visibility 10 km

8 AM

Overcast

13 °C

92 %

1.4 kmph / NNE

Feels 13.1 °C

Cover 100 %

Visibility 10 km

9 AM

Partly Cloudy

13 °C

92 %

0.2

0.7 kmph / N

Feels 13.2 °C

Cover 59 %

Visibility 10 km

10 AM

Overcast

14 °C

91 %

0.5

0.7 kmph / SW

Feels 14.1 °C

Cover 99 %

Visibility 10 km

11 AM

Cloudy

14 °C

88 %

1.2

1.4 kmph / NW

Feels 14.5 °C

Cover 69 %

Visibility 10 km

12 PM

Cloudy

15 °C

86 %

1.8

2.9 kmph / NNW

Feels 15.1 °C

Cover 74 %

Visibility 2 km

1 PM

Partly cloudy

17 °C

67 %

2.1

6.1 kmph / N

Feels 15.8 °C

Cover 75 %

Visibility 16 km

2 PM

Sunny

17 °C

79 %

2.1

7.2 kmph / N

Feels 17.2 °C

Cover 18 %

Visibility 10 km

3 PM

Sunny

18 °C

73 %

1.6

7.6 kmph / N

Feels 17.7 °C

Cover 1 %

Visibility 10 km

4 PM

Sunny

18 °C

72 %

0.9

9.7 kmph / N

Feels 18.2 °C

Cover 0 %

Visibility 10 km

5 PM

Sunny

18 °C

74 %

0.5

11.9 kmph / N

Feels 17.8 °C

Cover 0 %

Visibility 10 km

6 PM

Sunny

17 °C

78 %

0.2

9.7 kmph / N

Feels 16.8 °C

Cover 0 %

Visibility 10 km

7 PM

Clear

15 °C

83 %

6.8 kmph / N

Feels 14.2 °C

Cover 0 %

Visibility 10 km

8 PM

Clear

13 °C

83 %

6.8 kmph / N

Feels 12.6 °C

Cover 0 %

Visibility 10 km

9 PM

Clear

12 °C

86 %

6.5 kmph / N

Feels 11.6 °C

Cover 0 %

Visibility 10 km

10 PM

Clear

11 °C

91 %

5.8 kmph / NNE

Feels 10.9 °C

Cover 2 %

Visibility 10 km

11 PM

Clear

11 °C

89 %

5.4 kmph / NNE

Feels 10.7 °C

Cover 1 %

Visibility 10 km

Today

14°C

85 %

Sunday

13°C

68 %

Monday

15°C

51 %

Tuesday

16°C

50 %

Wednesday

13°C

71 %

Thursday

13°C

72 %

Friday

13°C

71 %

Saturday

13°C

71 %

Sunday

12°C

87 %

Monday

11°C

83 %

Temp17 °C

ConditionSunny

Humidity79 %

Feels17.2 °C

Cover18 %

Visibility10 km

Wind Speed & Dir.7.2 kmph / N

UV2.1

Mercer Island 30-Days (October 2025) Weather Forecast

See Hourly

Sun.

Mon.

Tue.

Wed.

Thu.

Fri.

Sat.

1Wed.

20°12 °C

2Thu.

21°12 °C

3Fri.

18°10 °C

4Today

16°10 °C

5Sun.

18°10 °C

6Mon.

22°9 °C

7Tue.

22°8 °C

8Wed.

20°8 °C

9Thu.

20°10 °C

10Fri.

21°11 °C

11Sat.

18°11 °C

12Sun.

12°10 °C

13Mon.

14°10 °C

14Tue.

17°8 °C

15Wed.

19°8 °C

16Thu.

16°11 °C

17Fri.

17°11 °C

18Sat.

17°9 °C

19Sun.

17°9 °C

20Mon.

15°8 °C

21Tue.

15°8 °C

22Wed.

15°7 °C

23Thu.

13°7 °C

24Fri.

14°7 °C

25Sat.

13°6 °C

26Sun.

12°6 °C

27Mon.

13°6 °C

28Tue.

13°7 °C

29Wed.

13°7 °C

30Thu.

13°7 °C

31Fri.

13°6 °C

OctoberWeather Overview

No. of days:

Sunny

Cloudy

Rainy

Snowy

The monthly weather averages in Mercer Island consist of 8 sunny days, 4 cloudy days, 19 rainy days, and 0 snowy days.

Mercer Island's Locations Weather Conditions

Locations

Temp

Condition

Humi.

Wind Speed & Direction

Beacon Hill

17 °C

Partly cloudy

67%

2.1

6.1 kmph / N

United States's Hottest Cities - October 2025

Hottest

Coldest

RankCityTemperatureWeather ConditionHumidityUVWind Speed & Dir.

San Marcos, United States

33 °C

Sunny

27%

6.7

14.4 kmph / E

Mission, United States

33 °C

Sunny

36%

6.3

13 kmph / NE

Edinburg, United States

33 °C

Sunny

36%

4.6

15.1 kmph / NE

Brownsville, United States

33 °C

Partly cloudy

50%

4.6

23.4 kmph / NE

Kyle, United States

33 °C

Sunny

31%

6.7

14.8 kmph / E

Dripping Springs, United States

33 °C

Sunny

27%

6.7

13 kmph / E

Lockhart, United States

33 °C

Sunny

31%

6.7

14 kmph / E

Golden Gate, United States

33 °C

Partly cloudy

47%

2.4

18 kmph / E

Austin, United States

33 °C

Sunny

27%

6.7

10.1 kmph / ENE

10.

East Bethel, United States

32 °C

Sunny

34%

3.3

31 kmph / SSW

Last Updated: 04 Oct 2025, 08:50 PM

City Weather Rankings

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

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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

Trending in United States

Mercer Island 10-Days Weather Forecast

Mercer Island 30-Days (October 2025) Weather Forecast

OctoberWeather Overview

No. of days:

Mercer Island's Locations Weather Conditions

United States's Hottest Cities - October 2025

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Mercer Island Weather Conditions
Current Temperature Level