Mercer Island Weather Conditions
Current Temperature Level
Mercer Island Weather Conditions
Current Temperature Level
Feels Like 27°C
Chances of Rain1%
30°1%5 PM29°1%6 PM28°1%7 PM25°1%8 PM23°2%9 PM
20°3%10 PM19°5%11 PM17°6%12 AM17°7%1 AM16°8%2 AM16°9%3 AM15°9%4 AM15°10%5 AM15°11%6 AM14°11%7 AM15°10%8 AM17°6%9 AM20°4%10 AM23°2%11 AM25°1%12 PM27°1%1 PM29°1%2 PM30°0%3 PM31°1%It is likely to be sunny; sun protection may help.
Last Updated: 2026-08-16 16:15 (Local Time)
337°NNW
Direction
9km/h
Wind Speed
Gust Speed
2.8m/s
Precipitation
Precipitation
0mm
Pressure
1018mb
UV Index
3.3Moderate
Today
21
°C
59%Monday
22
°C56%Tuesday
20
°C62%Wednesday
20
°C63%Thursday
21
°C60%Friday
21
°C59%Saturday
17
°C67%Sunday
18
°C65%Monday
19
°C67%Tuesday
19
°C65%Sunny
Clear Sky with temperature at 21 °C and humidity will be at 59% with 13.7 km/h winds.30°C / 15°C
Humi.59 %
Prec.0 mm
Sunrise
06:06 AM14hrs 14min
Sunset
08:20 PMTime
Condition
Temp
Humidity
UV
Wind Speed & Dir.
12 AM
Clear
17 °C
73 %
0
1.4 kmph / SSE
Clear
Feels 17 °C
Cover 18 %
Visibility 10 km
1 AM
Clear
16 °C
76 %
0
1.4 kmph / SSW
ClearFeels 16 °C
Cover 21 %
Visibility 10 km
2 AM
Clear
16 °C
78 %
0
2.9 kmph / SSW
ClearFeels 16 °C
Cover 21 %
Visibility 10 km
3 AM
Clear
15 °C
79 %
0
3.2 kmph / SSW
ClearFeels 15 °C
Cover 21 %
Visibility 10 km
4 AM
Clear
15 °C
79 %
0
4 kmph / SW
ClearFeels 15 °C
Cover 21 %
Visibility 10 km
5 AM
Clear
15 °C
80 %
0
3.6 kmph / SW
ClearFeels 14 °C
Cover 22 %
Visibility 10 km
6 AM
Clear
15 °C
81 %
0
3.2 kmph / SW
ClearFeels 14 °C
Cover 22 %
Visibility 10 km
7 AM
Partly Cloudy
15 °C
78 %
0.1
3.6 kmph / SW
Partly CloudyFeels 15 °C
Cover 44 %
Visibility 10 km
8 AM
Partly Cloudy
16 °C
72 %
0.3
3.6 kmph / SW
Partly CloudyFeels 16 °C
Cover 48 %
Visibility 10 km
9 AM
Partly Cloudy
18 °C
65 %
0.8
4 kmph / SW
Partly CloudyFeels 18 °C
Cover 54 %
Visibility 10 km
10 AM
Partly Cloudy
20 °C
58 %
1.5
3.2 kmph / WSW
Partly CloudyFeels 20 °C
Cover 50 %
Visibility 10 km
11 AM
Partly Cloudy
23 °C
49 %
2.7
4 kmph / W
Partly CloudyFeels 23 °C
Cover 29 %
Visibility 10 km
12 PM
Sunny
25 °C
42 %
4
4 kmph / WNW
SunnyFeels 25 °C
Cover 20 %
Visibility 10 km
1 PM
Sunny
27 °C
38 %
5.4
4.3 kmph / NW
SunnyFeels 27 °C
Cover 19 %
Visibility 10 km
2 PM
Sunny
29 °C
35 %
5.6
4.7 kmph / NW
SunnyFeels 28 °C
Cover 15 %
Visibility 10 km
3 PM
Sunny
29 °C
33 %
4.7
5.8 kmph / NNW
SunnyFeels 29 °C
Cover 14 %
Visibility 10 km
4 PM
Sunny
30 °C
32 %
3.3
7.2 kmph / NNW
SunnyFeels 28 °C
Cover 11 %
Visibility 10 km
5 PM
Sunny
29 °C
32 %
1.9
10.4 kmph / NNW
SunnyFeels 27 °C
Cover 9 %
Visibility 10 km
6 PM
Sunny
28 °C
36 %
0.8
13.7 kmph / NNW
SunnyFeels 25 °C
Cover 8 %
Visibility 10 km
7 PM
Sunny
25 °C
42 %
0.3
12.6 kmph / N
SunnyFeels 24 °C
Cover 4 %
Visibility 10 km
8 PM
Sunny
23 °C
51 %
0
11.5 kmph / N
SunnyFeels 21 °C
Cover 2 %
Visibility 10 km
9 PM
Clear
20 °C
60 %
0
9 kmph / N
ClearFeels 19 °C
Cover 2 %
Visibility 10 km
10 PM
Clear
19 °C
66 %
0
7.9 kmph / N
ClearFeels 18 °C
Cover 2 %
Visibility 10 km
11 PM
Clear
17 °C
70 %
0
7.2 kmph / NNE
ClearFeels 17 °C
Cover 0 %
Visibility 10 km
24°15°21°12°26°11°27°13°30°13°
30°14°29°15°28°15°25°13°24°13°26°13°26°14°27°14°27°14°29°15°28°13°29°13°27°13°27°12°27°13°27°14°21°13°24°12°25°13°26°14°25°14°
25°14°25°14°
23°14°23°13°22°13°AugustWeather Overview
No. of days:
Sunny
21
Cloudy
0
Rainy
8
Snowy
0
The monthly weather averages in Mercer Island consist of 21 sunny days, 0 cloudy days, 8 rainy days, and 0 snowy days.
Mercer Island's Locations Weather Conditions
United States's Hottest Cities - August 2026
1.
Blythe, California
43 °C
Sunny
15%
4
18.4 kmph / SSW
2.
Brawley, California
43 °C
Sunny
15%
4.1
6.5 kmph / SW
3.
Westmorland, California
43 °C
Sunny
15%
4.1
6.5 kmph / SW
4.
El Centro, California
42 °C
Sunny
16%
4.2
6.8 kmph / SSW
5.
Lone Grove, Oklahoma
42 °C
Sunny
15%
1.5
16.9 kmph / SW
6.
Yuma, Arizona
42 °C
Partly Cloudy
15%
4.1
15.8 kmph / S
7.
Healdton, Oklahoma
42 °C
Sunny
15%
1.5
16.9 kmph / SW
8.
Calexico, California
42 °C
Sunny
16%
4.2
5.8 kmph / SSW
9.
Corsicana, Texas
42 °C
Sunny
10%
1.4
10.1 kmph / SSW
10.
Kaufman, Texas
42 °C
Sunny
12%
1.4
9.7 kmph / SSW
Last Updated: 17 Aug 2026, 12:07 AM
City Weather RankingsFAQs About Mercer Island Weather Conditions
1. What is the current temperature in Mercer Island today - 16 August 2026?
1. What is the current temperature in Mercer Island today - 16 August 2026?
The current temperature in Mercer Island is 28°C, with a feels-like temperature of 27°C. Today's forecast shows a high of 30°C and a low of 15°C, giving a 15 degree swing through the day as of 04:15 PM 16 August 2026.
2. What are the current weather parameters in Mercer Island today?
2. What are the current weather parameters in Mercer Island today?
Here is a complete overview of Mercer Island's current weather conditions as of 04:15 PM 16 August 2026: Condition : Sunny Temperature : 28°C Pleasant (Feels like 27°C) Humidity : 37% Wind Speed : 9 km/h from NNW (337 degrees), Gust 2.9 m/s UV Index : 3.3 (Moderate Air Pressure : 1018 mb Cloud Cover : 11% Visibility : 10 km Precipitation : 0 mm (4% chance of rain)
3. What is the 10-day weather forecast for Mercer Island from 04:15 PM 16 August 2026?
3. What is the 10-day weather forecast for Mercer Island from 04:15 PM 16 August 2026?
From 04:15 PM 16 August 2026, Mercer Island's 10-day forecast shows this trend: Today (Aug. 16) : Temp. 21°C, Hum. 59% and Sunny condition. Monday (Aug. 17) : Temp. 22°C, Hum. 56% and Sunny condition. Tuesday (Aug. 18) : Temp. 20°C, Hum. 62% and Sunny condition. Wednesday (Aug. 19) : Temp. 20°C, Hum. 63% and Sunny condition. Thursday (Aug. 20) : Temp. 21°C, Hum. 60% and Sunny condition. Friday (Aug. 21) : Temp. 21°C, Hum. 59% and Sunny condition. Saturday (Aug. 22) : Temp. 17°C, Hum. 67% and Overcast condition. Sunday (Aug. 23) : Temp. 18°C, Hum. 65% and Sunny condition. Monday (Aug. 24) : Temp. 19°C, Hum. 67% and Heavy Rain condition. Tuesday (Aug. 25) : Temp. 19°C, Hum. 65% and Rain Possible condition.
4. Will it rain in Mercer Island today?
4. Will it rain in Mercer Island today?
As of 04:15 PM 16 August 2026, there is a 1% chance of rainfall in Mercer Island later today around 2026-08-16 17:00. Current precipitation is 0 mm. Residents are advised to carry an umbrella before heading out.
5. What is the monthly weather forecast for Mercer Island in August 2026?
5. What is the monthly weather forecast for Mercer Island in August 2026?
August 2026 in Mercer Island is forecast to have 21 sunny days, 8 rainy days, 0 cloudy days, and 0 snowy days. Temperatures for the month range from lows around 11°C to highs of 30°C.
6. How does the weather in Mercer Island affect air quality?
6. How does the weather in Mercer Island affect air quality?
Weather directly impacts air quality in Mercer Island. Calm winds, high humidity, fog, and high pressure trap pollutants near the ground, worsening AQI. Strong winds, rainfall, and low pressure help disperse them. Rising temperatures and UV levels intensify ozone and smog formation, while poor visibility signals elevated particulate matter. Monitoring weather alongside AQI gives the clearest picture of outdoor safety.
