Mercer Island Weather Forecast 15 Days, Weather in Mercer Island Today
Current weather conditions and 15 day weather forecast for Mercer Island, Washington, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Mercer Island
| 11 November 2026 Wednesday 10.4 ° C / 50.7°F  Overcast |
Feels Like : 8.8 ° C / 47.8°F Humidity : % 86 Pressure : 1016 mb Wind Speed : 10.1 kmph / 6.3 miles from SE  Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 95 |
15 day weather forecast for Mercer Island, WA, USA
Weather Forecast for next 15 Days for Mercer Island including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Mercer Island, Washington state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 November 2026 Tuesday |  Light rain |
9.3 ° C (48.7°F) |
11.5 ° C (52.8°F) |
10.4 ° C (50.8°F) |
% 92 | 92% | 0.1 | Sunrise:07:06 AM Sunset: 04:38 PM |
Moonrise:09:17 AM Moonset: 05:07 PM Moon Phase ( New Moon ) |
|
| 11 November 2026 Wednesday | Overcast |
9.9 ° C (49.8°F) |
18.6 ° C (65.6°F) |
13.1 ° C (55.5°F) |
% 73 | 19% | 1.3 | Sunrise:07:08 AM Sunset: 04:37 PM |
Moonrise:10:22 AM Moonset: 05:57 PM Moon Phase ( Waxing Crescent ) |
|
| 12 November 2026 Thursday | Overcast |
9.7 ° C (49.5°F) |
16.8 ° C (62.2°F) |
12.4 ° C (54.3°F) |
% 70 | 18% | 0.7 | Sunrise:07:09 AM Sunset: 04:36 PM |
Moonrise:11:15 AM Moonset: 06:56 PM Moon Phase ( Waxing Crescent ) |
|
| 13 November 2026 Friday | Overcast |
9.3 ° C (48.8°F) |
15.4 ° C (59.7°F) |
12.1 ° C (53.7°F) |
% 72 | 79% | 0.8 | Sunrise:07:11 AM Sunset: 04:35 PM |
Moonrise:11:56 AM Moonset: 08:02 PM Moon Phase ( Waxing Crescent ) |
|
| 14 November 2026 Saturday |  Patchy rain nearby |
8.4 ° C (47.1°F) |
14 ° C (57.2°F) |
10.5 ° C (50.9°F) |
% 80 | 71% | 0.8 | Sunrise:07:12 AM Sunset: 04:33 PM |
Moonrise:12:26 PM Moonset: 09:10 PM Moon Phase ( First Quarter ) |
|
| 15 November 2026 Sunday | Light rain |
8.3 ° C (46.9°F) |
11.2 ° C (52.2°F) |
10.2 ° C (50.4°F) |
% 84 | 89% | 3 | Sunrise:07:14 AM Sunset: 04:32 PM |
Moonrise:12:50 PM Moonset: 10:18 PM Moon Phase ( First Quarter ) |
|
| 16 November 2026 Monday | Patchy rain nearby |
6.9 ° C (44.4°F) |
10.6 ° C (51°F) |
8.6 ° C (47.5°F) |
% 84 | 69% | 3 | Sunrise:07:15 AM Sunset: 04:31 PM |
Moonrise:01:09 PM Moonset: 11:25 PM Moon Phase ( First Quarter ) |
|
| 17 November 2026 Tuesday | Patchy rain nearby |
5 ° C (41.1°F) |
9.2 ° C (48.6°F) |
7.3 ° C (45.1°F) |
% 83 | 79% | 3 | Sunrise:07:16 AM Sunset: 04:30 PM |
Moonrise:01:26 PM Moonset: Does not set today Moon Phase ( First Quarter ) |
|
| 18 November 2026 Wednesday | Patchy rain nearby |
5.3 ° C (41.5°F) |
9.4 ° C (48.9°F) |
7.5 ° C (45.5°F) |
% 75 | 73% | 2 | Sunrise:07:18 AM Sunset: 04:29 PM |
Moonrise:01:41 PM Moonset: 12:32 AM Moon Phase ( Waxing Gibbous ) |
|
| 19 November 2026 Thursday |  Sunny |
3 ° C (37.4°F) |
8.4 ° C (47.2°F) |
5.7 ° C (42.3°F) |
% 85 | 14% | 3 | Sunrise:07:19 AM Sunset: 04:28 PM |
Moonrise:01:55 PM Moonset: 01:38 AM Moon Phase ( Waxing Gibbous ) |
|
| 20 November 2026 Friday |  Cloudy |
3.2 ° C (37.7°F) |
8.1 ° C (46.5°F) |
5.3 ° C (41.6°F) |
% 82 | 18% | 3 | Sunrise:07:21 AM Sunset: 04:27 PM |
Moonrise:02:10 PM Moonset: 02:46 AM Moon Phase ( Waxing Gibbous ) |
|
| 21 November 2026 Saturday | Cloudy |
2.8 ° C (37°F) |
7.4 ° C (45.4°F) |
4.8 ° C (40.7°F) |
% 79 | 13% | 3 | Sunrise:07:22 AM Sunset: 04:26 PM |
Moonrise:02:28 PM Moonset: 03:56 AM Moon Phase ( Waxing Gibbous ) |
|
| 22 November 2026 Sunday |  Partly Cloudy |
2.8 ° C (37.1°F) |
9.4 ° C (48.9°F) |
6.3 ° C (43.3°F) |
% 70 | 10% | 3 | Sunrise:07:24 AM Sunset: 04:25 PM |
Moonrise:02:49 PM Moonset: 05:10 AM Moon Phase ( Full Moon ) |
|
| 23 November 2026 Monday | Overcast |
6.1 ° C (43°F) |
9 ° C (48.2°F) |
7.4 ° C (45.3°F) |
% 81 | 72% | 2 | Sunrise:07:25 AM Sunset: 04:24 PM |
Moonrise:03:17 PM Moonset: 06:28 AM Moon Phase ( Full Moon ) |
|
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