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As of 12:25 PDT

Weather in Mercer Island, WA

74°Current weather

Mercer Island, Sunday, 9 August, 12:25

Partly cloudy. Feels like 74°. High 76°, low 56°.

Pressure30.06 inHg
Wind4 mph W
Humidity59%
Visibility6.2 mi
Dew point58°

Two-week outlook for Mercer Island, WA: week one averages a high of 81.7° and week two 79.5°, so week two runs 2.2° cooler than week one. Around 0.1 inches of precipitation are expected over the 14 days, across 1 wet days. The nearest weekend, August 9: 76°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (August 9 – August 15)81.7°56.9°0.0 in / 0 d—
2nd (August 16 – August 22)79.5°59.6°0.1 in / 1 d—

Weekend weather

Sun, August 9
Partly cloudy
76°56°
no precip.
Sat, August 15
Overcast
84°59°
no precip.
Sun, August 16
Overcast
76°56°
no precip.
Sat, August 22
Partly cloudy
83°59°
no precip.
Mon, 1078° / 53°0Overcast
78 °Overcast

Mercer Island, Monday, 10 August

Overcast. High 78°, low 53°.

Pressure30.06 inHg
Wind3 mph SW
Humidity42%
Visibility6.2 mi
Dew point51°
Tue, 1184° / 54°0Clear
84 °Clear

Mercer Island, Tuesday, 11 August

Clear. High 84°, low 54°.

Pressure30.09 inHg
Wind1 mph W
Humidity37%
Visibility6.2 mi
Dew point50°
Wed, 1279° / 58°0Overcast
79 °Overcast

Mercer Island, Wednesday, 12 August

Overcast. High 79°, low 58°.

Pressure30.03 inHg
Wind3.3 mph SW
Humidity58%
Visibility6.2 mi
Dew point55°
Thu, 1383° / 58°0Clear
83 °Clear

Mercer Island, Thursday, 13 August

Clear. High 83°, low 58°.

Pressure29.88 inHg
Wind5.3 mph N
Humidity42%
Visibility6.2 mi
Dew point54°
Fri, 1488° / 60°0Clear
88 °Clear

Mercer Island, Friday, 14 August

Clear. High 88°, low 60°.

Pressure29.88 inHg
Wind9.8 mph N
Humidity26%
Visibility—
Dew point46°
Sat, 1584° / 59°0Overcast
84 °Overcast

Mercer Island, Saturday, 15 August

Overcast. High 84°, low 59°.

Pressure29.97 inHg
Wind6.3 mph W
Humidity38%
Visibility—
Dew point50°
Sun, 1676° / 56°0Overcast
76 °Overcast

Mercer Island, Sunday, 16 August

Overcast. High 76°, low 56°.

Pressure30.09 inHg
Wind6.8 mph S
Humidity54%
Visibility—
Dew point53°
Mon, 1780° / 57°0.01Light rain
80 °Light rain

Mercer Island, Monday, 17 August

Light rain. High 80°, low 57°.

Pressure30.00 inHg
Wind5.6 mph SW
Humidity36%
Visibility—
Dew point47°
Tue, 1867° / 61°0.04Light rain
67 °Light rain

Mercer Island, Tuesday, 18 August

Light rain. High 67°, low 61°.

Pressure30.03 inHg
Wind6.4 mph S
Humidity75%
Visibility—
Dew point58°
Wed, 1983° / 63°0.02Light rain
83 °Light rain

Mercer Island, Wednesday, 19 August

Light rain. High 83°, low 63°.

Pressure30.00 inHg
Wind6.8 mph SW
Humidity44%
Visibility—
Dew point55°
Thu, 2084° / 61°0Overcast
84 °Overcast

Mercer Island, Thursday, 20 August

Overcast. High 84°, low 61°.

Pressure30.06 inHg
Wind7.4 mph NW
Humidity37%
Visibility—
Dew point53°
Fri, 2183° / 60°0Overcast
83 °Overcast

Mercer Island, Friday, 21 August

Overcast. High 83°, low 60°.

Pressure30.12 inHg
Wind8.4 mph N
Humidity37%
Visibility—
Dew point52°
Sat, 2283° / 59°0Partly cloudy
83 °Partly cloudy

Mercer Island, Saturday, 22 August

Partly cloudy. High 83°, low 59°.

Pressure30.09 inHg
Wind8.5 mph N
Humidity34%
Visibility—
Dew point50°

About this forecast

Can I plan a trip on a 2-week forecast?

Week one is solid for planning — accuracy is high. Week two shows the trend: go by the averages and the comparison with normal, and check the details closer to the date.

What does the "Vs normal" column mean?

It is the gap between the forecast and the climate normal for those same dates in Mercer Island, WA, computed over 60 years. A positive value means the week runs warmer than usual.

Why are weekends shown separately?

Saturday and Sunday plans are what people check most, so we give them their own cards with temperature and precipitation.