 |
 Current Mercer Island Weather Conditions |
Updated December 28th at 11:53 pm |
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| Temperature: | 36°F |
Dew Point: | 34°F |
| Barometer: | 30.6 inHg |
Wind: | calm |
| Humidity: | 93.1% |
Visibility: | 0M |
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| Mercer Island Weather Forecast Summary |
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Today
Dec 29th
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Tuesday
Dec 30th
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Wednesday
Dec 31st
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Thursday
Jan 1st
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Friday
Jan 2nd
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Cloudy |
Cloudy |
Cloudy |
Cloudy |
Showers |
42°F
|
48°F
32°F |
48°F
34°F |
48°F
37°F |
52°F
42°F |
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| Mercer Island Detailed Weather Forecast |
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| Monday, December 29th, 2025 |
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Overnight |
Temperature: 33°F |
| Cloudy. |
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Morning |
Temperature: 40°F |
| Cloudy. |
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Afternoon |
Temperature: 36°F |
| Cloudy. |
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Evening |
Temperature: 34°F |
| Cloudy. |
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| Tuesday, December 30th, 2025 |
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Overnight |
Temperature: 32°F |
| Cloudy. |
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Morning |
Temperature: 43°F |
| A mix of cloud and sun. |
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Afternoon |
Temperature: 38°F |
| A mix of cloud and sun. |
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Evening |
Temperature: 34°F |
| A mix of clear and cloudy skies. |
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| Wednesday, December 31st, 2025 |
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Overnight |
Temperature: 34°F |
| Cloudy. |
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Morning |
Temperature: 45°F |
| Sunny. |
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Afternoon |
Temperature: 39°F |
| Cloudy. |
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Evening |
Temperature: 37°F |
| Cloudy. |
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| Thursday, January 1st, 2026 |
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Overnight |
Temperature: 37°F |
| Cloudy. |
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Morning |
Temperature: 45°F |
| Cloudy. |
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Afternoon |
Temperature: 43°F |
| Cloudy. |
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Evening |
Temperature: 40°F |
| Cloudy with a chance of showers. |
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| Friday, January 2nd, 2026 |
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Overnight |
Temperature: 42°F |
| Cloudy. |
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Morning |
Temperature: 49°F |
| Cloudy. |
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Afternoon |
Temperature: 45°F |
| Cloudy. |
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Evening |
Temperature: 44°F |
| Cloudy with a few showers. |
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| Saturday, January 3rd, 2026 |
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Overnight |
Temperature: 42°F |
| Cloudy with showers likely. |
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Morning |
Temperature: 46°F |
| Cloudy with a chance of showers. |
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Afternoon |
Temperature: 42°F |
| Cloudy with a chance of showers. |
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Evening |
Temperature: 40°F |
| Cloudy with a chance of showers. |
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| Sunday, January 4th, 2026 |
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Overnight |
Temperature: 38°F |
| Cloudy with showers likely. Showers possibly mixed with wet flurries. |
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Morning |
Temperature: 43°F |
| Cloudy with a chance of showers. |
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Afternoon |
Temperature: 40°F |
| Cloudy with sunny periods. |
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Evening |
Temperature: 35°F |
| Cloudy. |
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| Monday, January 5th, 2026 |
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Overnight |
Temperature: 37°F |
| Cloudy. |
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Morning |
Temperature: 43°F |
| Cloudy. |
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Afternoon |
Temperature: 42°F |
| Cloudy. |
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Evening |
Temperature: 37°F |
| Clear with cloudy periods. |
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| Tuesday, January 6th, 2026 |
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Overnight |
Temperature: 35°F |
| Clear. |
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Morning |
Temperature: 45°F |
| Sunny. |
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Afternoon |
Temperature: 40°F |
| Sunny. |
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Evening |
Temperature: 35°F |
| Clear. |
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