Weather in Mercer Island, WA
Mercer Island, Sunday, 15 November, 05:57
Light rain. Feels like 52°. High 57°, low 49°.
Monthly outlook for Mercer Island, WA: average high 51.9°, average low 43.9°. That is 3.1° above the climate normal for November. Precipitation is expected on 8 days (about 4.3 inches), against a normal of 10 days and 4.1 inches. The warmest day looks like 16 November (57.7°), the coolest 20 November (37°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 November – 24 November | 51.6° | 47.1° | +2.5° |
| 25 November – 4 December | 52.4° | 44.8° | +4.2° |
| 5 December – 14 December | at normal | 43.6° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Bellevue (4 mi).
0.01Mercer Island, Monday, 16 November
Light rain. High 58°, low 45°.
0
Mercer Island, Tuesday, 17 November
Overcast. High 50°, low 41°.
0Mercer Island, Wednesday, 18 November
Overcast. High 53°, low 41°.
0
Mercer Island, Thursday, 19 November
Mostly clear. High 51°, low 40°.
0Mercer Island, Friday, 20 November
Mostly clear. High 49°, low 37°.
0.22Mercer Island, Saturday, 21 November
Light rain. High 49°, low 42°.
0.16Mercer Island, Sunday, 22 November
Light rain. High 51°, low 41°.
1.3Mercer Island, Monday, 23 November
Rain. High 47°, low 43°.
1.35Mercer Island, Tuesday, 24 November
Rain. High 51°, low 47°.
0.58Mercer Island, Wednesday, 25 November
Rain. High 51°, low 45°.
0.24Mercer Island, Thursday, 26 November
Rain. High 53°, low 48°.
0.02Mercer Island, Friday, 27 November
Light rain. High 54°, low 46°.
0.08Mercer Island, Saturday, 28 November
Light rain. High 52°, low 48°.
0.02Mercer Island, Sunday, 29 November
Light rain. High 50°, low 47°.
0Mercer Island, Monday, 30 November
Overcast. High 54°, low 44°.
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.
0.23Mercer Island, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.27Mercer Island, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.31Mercer Island, Thursday, 10 December
Climate normal for this date — 60-year average.
0.27Mercer Island, Friday, 11 December
Climate normal for this date — 60-year average.
0.27Mercer Island, Saturday, 12 December
Climate normal for this date — 60-year average.
0.27Mercer Island, Sunday, 13 December
Climate normal for this date — 60-year average.
0.3Mercer Island, Monday, 14 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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