Weather in John Sam Lake, WA
John Sam Lake, Sunday, 15 November, 05:18
Light rain. Feels like 52°. High 55°, low 47°.
Monthly outlook for John Sam Lake, WA: average high 50.3°, average low 39.7°. That is 2.3° above the climate normal for November. Precipitation is expected on 6 days (about 1.6 inches), against a normal of 11 days and 5.1 inches. The warmest day looks like 15 November (55.2°), the coolest 20 November (31.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 November – 24 November | 49.7° | 46.9° | +1.5° |
| 25 November – 4 December | 51.3° | 44.5° | +3.7° |
| 5 December – 14 December | at normal | 43.4° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Marysville (4 mi).
0.1John Sam Lake, Monday, 16 November
Light rain. High 55°, low 40°.
0.01John Sam Lake, Tuesday, 17 November
Light rain. High 50°, low 34°.
0
John Sam Lake, Wednesday, 18 November
Overcast. High 49°, low 34°.
0
John Sam Lake, Thursday, 19 November
Partly cloudy. High 47°, low 34°.
0
John Sam Lake, Friday, 20 November
Clear. High 46°, low 32°.
0.27John Sam Lake, Saturday, 21 November
Light rain. High 45°, low 39°.
0.03John Sam Lake, Sunday, 22 November
Light rain. High 49°, low 41°.
0.37John Sam Lake, Monday, 23 November
Rain. High 50°, low 44°.
0.57John Sam Lake, Tuesday, 24 November
Rain. High 51°, low 45°.
0.1John Sam Lake, Wednesday, 25 November
Light rain. High 54°, low 46°.
0John Sam Lake, Thursday, 26 November
Overcast. High 49°, low 43°.
0John Sam Lake, Friday, 27 November
Overcast. High 49°, low 39°.
0
John Sam Lake, Saturday, 28 November
Mostly clear. High 50°, low 38°.
0John Sam Lake, Sunday, 29 November
Overcast. High 54°, low 40°.
0John Sam Lake, Monday, 30 November
Overcast. High 51°, low 41°.
0.32John Sam Lake, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.36John Sam Lake, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.36John Sam Lake, Thursday, 3 December
Climate normal for this date — 60-year average.
0.29John Sam Lake, Friday, 4 December
Climate normal for this date — 60-year average.
0.25John Sam Lake, Saturday, 5 December
Climate normal for this date — 60-year average.
0.24John Sam Lake, Sunday, 6 December
Climate normal for this date — 60-year average.
0.24John Sam Lake, Monday, 7 December
Climate normal for this date — 60-year average.
0.3John Sam Lake, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.31John Sam Lake, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.38John Sam Lake, Thursday, 10 December
Climate normal for this date — 60-year average.
0.35John Sam Lake, Friday, 11 December
Climate normal for this date — 60-year average.
0.35John Sam Lake, Saturday, 12 December
Climate normal for this date — 60-year average.
0.31John Sam Lake, Sunday, 13 December
Climate normal for this date — 60-year average.
0.36John Sam Lake, 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 John Sam Lake, 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 John Sam Lake, 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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