Weather in Mercer Island, WA
Mercer Island, Sunday, 8 November, 16:15
Clear. Feels like 54°. High 57°, low 45°.
Monthly outlook for Mercer Island, WA: average high 54°, average low 43.9°. That is 3° above the climate normal for November. Precipitation is expected on 9 days (about 3.9 inches), against a normal of 10 days and 4.0 inches. The warmest day looks like 11 November (67.9°), the coolest 20 November (35.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 November – 17 November | 56° | 49.9° | +3.4° |
| 18 November – 27 November | 50.8° | 46.1° | +2.6° |
| 28 November – 7 December | at normal | 44.2° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Bellevue (4 mi).
0.37
Mercer Island, Monday, 9 November
Rain. High 58°, low 46°.
0.63Mercer Island, Tuesday, 10 November
Rain. High 55°, low 48°.
0.05Mercer Island, Wednesday, 11 November
Light rain. High 68°, low 52°.
0.12Mercer Island, Thursday, 12 November
Rain. High 60°, low 49°.
0.89Mercer Island, Friday, 13 November
Rain. High 54°, low 48°.
1.25Mercer Island, Saturday, 14 November
Rain. High 53°, low 48°.
0.03Mercer Island, Sunday, 15 November
Light rain. High 54°, low 46°.
0.26Mercer Island, Monday, 16 November
Light rain. High 51°, low 45°.
0Mercer Island, Tuesday, 17 November
Light rain. High 51°, low 42°.
0
Mercer Island, Wednesday, 18 November
Partly cloudy. High 49°, low 38°.
0Mercer Island, Thursday, 19 November
Partly cloudy. High 49°, low 38°.
0Mercer Island, Friday, 20 November
Clear. High 52°, low 36°.
0Mercer Island, Saturday, 21 November
Partly cloudy. High 52°, low 38°.
0
Mercer Island, Sunday, 22 November
Overcast. High 49°, low 40°.
0.11Mercer Island, Monday, 23 November
Light rain. High 53°, low 44°.
0.32Mercer Island, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.35Mercer Island, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.23Mercer Island, Thursday, 26 November
Climate normal for this date — 60-year average.
0.28Mercer Island, Friday, 27 November
Climate normal for this date — 60-year average.
0.2Mercer Island, Saturday, 28 November
Climate normal for this date — 60-year average.
0.22Mercer Island, Sunday, 29 November
Climate normal for this date — 60-year average.
0.25Mercer Island, Monday, 30 November
Climate normal for this date — 60-year average.
0.24Mercer Island, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.31Mercer Island, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.32Mercer Island, Thursday, 3 December
Climate normal for this date — 60-year average.
0.26Mercer Island, Friday, 4 December
Climate normal for this date — 60-year average.
0.19
Mercer Island, Saturday, 5 December
Climate normal for this date — 60-year average.
0.19Mercer Island, Sunday, 6 December
Climate normal for this date — 60-year average.
0.2Mercer Island, Monday, 7 December
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Mercer Island, WA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Mercer Island, WA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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