14 days forecast Mercer Island
See the weather for the coming 14 days in Mercer Island.
Monday, April 6 
90%
9° / 21°
3
90%Radiant sunny weather
Total precipitation 0 mm
Precipitation chance 0%
UV index 3
Tuesday, April 7 
90%
7° / 14°
2
90%Sun and chance of a shower
Total precipitation 1.1 mm
Precipitation chance 35%
UV index 4
Wednesday, April 8 90%
5° / 16°
3
90%Radiant sunny weather
Total precipitation 0 mm
Precipitation chance 0%
UV index 4
Thursday, April 9 90%
5° / 17°
2
90%Radiant sunny weather
Total precipitation 0 mm
Precipitation chance 0%
UV index 5
Friday, April 10 
85%
7° / 17°
2
85%Lots of sun, also cirrus clouds
Total precipitation 0.3 mm
Precipitation chance 10%
UV index 4
Saturday, April 11 40%
9° / 15°
2
40%Sun and chance of a shower
Total precipitation 1.5 mm
Precipitation chance 50%
UV index 2
Sunday, April 12 45%
8° / 15°
2
45%Sun and chance of a shower
Total precipitation 2.1 mm
Precipitation chance 65%
UV index 2
Monday, April 13 50%
8° / 16°
2
50%Sun and chance of a shower
Total precipitation 1.6 mm
Precipitation chance 55%
UV index 3
Tuesday, April 14 
75%
9° / 17°
2
75%Lots of sun, few clouds
Total precipitation 0.9 mm
Precipitation chance 30%
UV index 3
Wednesday, April 15 
55%
9° / 17°
2
55%Regular sun, also clouds
Total precipitation 1 mm
Precipitation chance 30%
UV index 2
Thursday, April 16 55%
10° / 18°
2
55%Sun and chance of a shower
Total precipitation 2.2 mm
Precipitation chance 65%
UV index 3
Friday, April 17 
50%
11° / 17°
3
50%Sun, but also an occasional shower
Total precipitation 4.8 mm
Precipitation chance 85%
UV index 2
Saturday, April 18 40%
10° / 16°
3
40%Sun and chance of a shower
Total precipitation 2.7 mm
Precipitation chance 75%
UV index 2
Sunday, April 19 45%
10° / 16°
2
45%Sun and chance of a shower
Total precipitation 2.2 mm
Precipitation chance 65%
UV index 2