Monthly outlook for John Sam Lake, WA: average high 50.9°, average low 41.1°. That is 2.1° above the climate normal for November. Precipitation is expected on 7 days (about 2.1 inches), against a normal of 11 days and 5.3 inches. The warmest day looks like 13 November (60°), the coolest 18 November (32.7°).
50.9°/41.1°
Average high / low
+2.1°
Above normal
7 / 11
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 November – 21 November
51.5°
48.2°
+1.8°
22 November – 1 December
50°
44.9°
+2.8°
2 December – 11 December
at normal
43.6°
—
November records over 66 years
66.6°4 November 1980All-time high
-0.2°23 November 1985All-time low
Climate normals and records are computed from the nearest reference point — Marysville (4 mi).
Fri, 1360° / 52°0.07
60 °
John Sam Lake, Friday, 13 November
Light rain. High 60°, low 52°.
Pressure29.29 inHg
Wind14.3 mph S
Humidity74%
Visibility3.9 mi
Dew point48°
Sat, 1458° / 50°0.11
58 °
John Sam Lake, Saturday, 14 November
Light rain. High 58°, low 50°.
Pressure29.71 inHg
Wind10.1 mph SE
Humidity70%
Visibility3.8 mi
Dew point45°
Sun, 1554° / 46°0.32
54 °
John Sam Lake, Sunday, 15 November
Rain. High 54°, low 46°.
Pressure29.83 inHg
Wind15 mph S
Humidity69%
Visibility6.2 mi
Dew point44°
Mon, 1651° / 43°0.18
51 °
John Sam Lake, Monday, 16 November
Rain. High 51°, low 43°.
Pressure30.06 inHg
Wind9.4 mph SE
Humidity67%
Visibility6.2 mi
Dew point40°
Tue, 1748° / 36°0
48 °
John Sam Lake, Tuesday, 17 November
Mostly clear. High 48°, low 36°.
Pressure30.09 inHg
Wind6.9 mph SE
Humidity95%
Visibility—
Dew point42°
Wed, 1846° / 33°0
46 °
John Sam Lake, Wednesday, 18 November
Overcast. High 46°, low 33°.
Pressure29.83 inHg
Wind4.3 mph E
Humidity69%
Visibility—
Dew point32°
Thu, 1946° / 36°0
46 °
John Sam Lake, Thursday, 19 November
Mostly clear. High 46°, low 36°.
Pressure30.03 inHg
Wind7.1 mph NW
Humidity71%
Visibility—
Dew point33°
Fri, 2046° / 33°0
46 °
John Sam Lake, Friday, 20 November
Partly cloudy. High 46°, low 33°.
Pressure30.15 inHg
Wind5 mph NW
Humidity68%
Visibility—
Dew point30°
Sat, 2147° / 33°0
47 °
John Sam Lake, Saturday, 21 November
Mostly clear. High 47°, low 33°.
Pressure30.15 inHg
Wind2.4 mph E
Humidity57%
Visibility—
Dew point26°
Sun, 2248° / 34°0
48 °
John Sam Lake, Sunday, 22 November
Partly cloudy. High 48°, low 34°.
Pressure30.15 inHg
Wind2.5 mph SE
Humidity61%
Visibility—
Dew point29°
Mon, 2348° / 34°0
48 °
John Sam Lake, Monday, 23 November
Partly cloudy. High 48°, low 34°.
Pressure30.18 inHg
Wind2.9 mph E
Humidity65%
Visibility—
Dew point30°
Tue, 2445° / 36°0.01
45 °
John Sam Lake, Tuesday, 24 November
Light rain. High 45°, low 36°.
Pressure30.15 inHg
Wind3.8 mph SE
Humidity71%
Visibility—
Dew point33°
Wed, 2552° / 45°0.82
52 °
John Sam Lake, Wednesday, 25 November
Rain. High 52°, low 45°.
Pressure29.94 inHg
Wind9.9 mph SE
Humidity94%
Visibility—
Dew point45°
Thu, 2653° / 48°0.19
53 °
John Sam Lake, Thursday, 26 November
Rain. High 53°, low 48°.
Pressure29.97 inHg
Wind16.8 mph S
Humidity79%
Visibility—
Dew point44°
Fri, 2754° / 48°0.36
54 °
John Sam Lake, Friday, 27 November
Rain. High 54°, low 48°.
Pressure29.94 inHg
Wind18.7 mph SE
Humidity87%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2845° / 35°0.26
45 °
John Sam Lake, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high45°
Average low35°
Average precipitation0.26 in
Chance of precipitation60%
Record high56° (2021)
Record low13° (1985)
Sun, 2944° / 35°0.27
44 °
John Sam Lake, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.27 in
Chance of precipitation55%
Record high55° (2021)
Record low7° (1985)
Mon, 3044° / 36°0.31
44 °
John Sam Lake, Monday, 30 November
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.31 in
Chance of precipitation67%
Record high57° (2008)
Record low9° (1985)
Tue, 0145° / 36°0.32
45 °
John Sam Lake, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.32 in
Chance of precipitation68%
Record high55° (2021)
Record low6° (1985)
Wed, 0244° / 36°0.36
44 °
John Sam Lake, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.36 in
Chance of precipitation70%
Record high54° (2021)
Record low19° (1985)
Thu, 0344° / 35°0.36
44 °
John Sam Lake, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.36 in
Chance of precipitation63%
Record high55° (1965)
Record low21° (1994)
Fri, 0444° / 34°0.29
44 °
John Sam Lake, Friday, 4 December
Climate normal for this date — 60-year average.
Average high44°
Average low34°
Average precipitation0.29 in
Chance of precipitation60%
Record high54° (2007)
Record low10° (1994)
Sat, 0543° / 34°0.25
43 °
John Sam Lake, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high43°
Average low34°
Average precipitation0.25 in
Chance of precipitation60%
Record high55° (2023)
Record low14° (1994)
Sun, 0644° / 35°0.24
44 °
John Sam Lake, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.24 in
Chance of precipitation52%
Record high53° (2019)
Record low21° (1972)
Mon, 0743° / 35°0.24
43 °
John Sam Lake, Monday, 7 December
Climate normal for this date — 60-year average.
Average high43°
Average low35°
Average precipitation0.24 in
Chance of precipitation60%
Record high52° (2014)
Record low12° (1972)
Tue, 0843° / 35°0.3
43 °
John Sam Lake, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high43°
Average low35°
Average precipitation0.3 in
Chance of precipitation60%
Record high55° (2014)
Record low11° (1972)
Wed, 0943° / 35°0.31
43 °
John Sam Lake, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high43°
Average low35°
Average precipitation0.31 in
Chance of precipitation67%
Record high55° (2014)
Record low21° (1972)
Thu, 1044° / 36°0.38
44 °
John Sam Lake, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.38 in
Chance of precipitation73%
Record high58° (2014)
Record low13° (1972)
Fri, 1144° / 37°0.35
44 °
John Sam Lake, Friday, 11 December
Climate normal for this date — 60-year average.
Average high44°
Average low37°
Average precipitation0.35 in
Chance of precipitation70%
Record high56° (2025)
Record low19° (1971)
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.