Monthly outlook for West Thumb, WY: average high 36.9°, average low 23.6°. That is 0° below the climate normal for October. Precipitation is expected on 8 days (about 1.4 inches), against a normal of 7 days and 1.5 inches. The warmest day looks like 25 October (45.5°), the coolest 8 November (14.1°).
36.9°/23.6°
Average high / low
−0°
Below normal
8 / 7
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
38.1°
38.2°
-0°
3 November – 12 November
34.9°
34.1°
+0.4°
13 November – 22 November
at normal
30°
—
October records over 66 years
70°3 October 2010All-time high
-8.3°29 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Lake (13 mi).
Sun, 2546° / 27°0
46 °
West Thumb, Sunday, 25 October
Clear. High 46°, low 27°.
Pressure30.15 inHg
Wind3.6 mph E
Humidity61%
Visibility6.2 mi
Dew point25°
Mon, 2643° / 30°0.03
43 °
West Thumb, Monday, 26 October
Snow. High 43°, low 30°.
Pressure30.06 inHg
Wind8.7 mph SW
Humidity69%
Visibility6.2 mi
Dew point31°
Tue, 2730° / 24°0.07
30 °
West Thumb, Tuesday, 27 October
Snow. High 30°, low 24°.
Pressure30.15 inHg
Wind13.4 mph SW
Humidity96%
Visibility5.9 mi
Dew point23°
Wed, 2833° / 24°0.01
33 °
West Thumb, Wednesday, 28 October
Light snow. High 33°, low 24°.
Pressure30.12 inHg
Wind11.7 mph SW
Humidity90%
Visibility1.1 mi
Dew point20°
Thu, 2941° / 26°0.01
41 °
West Thumb, Thursday, 29 October
Light rain. High 41°, low 26°.
Pressure29.91 inHg
Wind8.4 mph S
Humidity69%
Visibility—
Dew point29°
Fri, 3044° / 26°0.15
44 °
West Thumb, Friday, 30 October
Snow. High 44°, low 26°.
Pressure29.74 inHg
Wind11.7 mph SW
Humidity58%
Visibility—
Dew point27°
Sat, 3129° / 19°0.06
29 °
West Thumb, Saturday, 31 October
Light snow. High 29°, low 19°.
Pressure30.15 inHg
Wind15.7 mph SW
Humidity63%
Visibility—
Dew point15°
Sun, 0132° / 15°0.01
32 °
West Thumb, Sunday, 1 November
Light snow. High 32°, low 15°.
Pressure30.45 inHg
Wind12.2 mph SW
Humidity64%
Visibility—
Dew point15°
Mon, 0245° / 18°0
45 °
West Thumb, Monday, 2 November
Partly cloudy. High 45°, low 18°.
Pressure30.42 inHg
Wind4.1 mph SW
Humidity54%
Visibility—
Dew point23°
Tue, 0336° / 30°0.04
36 °
West Thumb, Tuesday, 3 November
Snow. High 36°, low 30°.
Pressure30.12 inHg
Wind9 mph SW
Humidity96%
Visibility—
Dew point33°
Wed, 0437° / 33°0.05
37 °
West Thumb, Wednesday, 4 November
Light snow. High 37°, low 33°.
Pressure29.85 inHg
Wind15 mph SW
Humidity84%
Visibility—
Dew point33°
Thu, 0534° / 25°0.36
34 °
West Thumb, Thursday, 5 November
Snow. High 34°, low 25°.
Pressure29.91 inHg
Wind15.6 mph SW
Humidity97%
Visibility—
Dew point32°
Fri, 0634° / 29°0.49
34 °
West Thumb, Friday, 6 November
Snow. High 34°, low 29°.
Pressure29.77 inHg
Wind17.9 mph SW
Humidity97%
Visibility—
Dew point32°
Sat, 0731° / 16°0.04
31 °
West Thumb, Saturday, 7 November
Light snow. High 31°, low 16°.
Pressure30.27 inHg
Wind17 mph SW
Humidity89%
Visibility—
Dew point26°
Sun, 0837° / 14°0
37 °
West Thumb, Sunday, 8 November
Clear. High 37°, low 14°.
Pressure30.06 inHg
Wind6.5 mph S
Humidity79%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0933° / 21°0.11
33 °
West Thumb, Monday, 9 November
Climate normal for this date — 60-year average.
Average high33°
Average low21°
Average precipitation0.11 in
Chance of precipitation50%
Record high50° (2016)
Record low5° (1966)
Tue, 1032° / 21°0.08
32 °
West Thumb, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high32°
Average low21°
Average precipitation0.08 in
Chance of precipitation43%
Record high51° (2016)
Record low-4° (1986)
Wed, 1132° / 20°0.09
32 °
West Thumb, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high32°
Average low20°
Average precipitation0.09 in
Chance of precipitation42%
Record high50° (2016)
Record low-3° (2014)
Thu, 1233° / 20°0.1
33 °
West Thumb, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high33°
Average low20°
Average precipitation0.1 in
Chance of precipitation38%
Record high52° (1999)
Record low-9° (2014)
Fri, 1332° / 21°0.11
32 °
West Thumb, Friday, 13 November
Climate normal for this date — 60-year average.
Average high32°
Average low21°
Average precipitation0.11 in
Chance of precipitation43%
Record high49° (1999)
Record low-1° (2014)
Sat, 1431° / 20°0.1
31 °
West Thumb, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high31°
Average low20°
Average precipitation0.1 in
Chance of precipitation43%
Record high52° (1999)
Record low3° (2000)
Sun, 1531° / 19°0.05
31 °
West Thumb, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high31°
Average low19°
Average precipitation0.05 in
Chance of precipitation25%
Record high54° (1999)
Record low1° (2014)
Mon, 1631° / 20°0.1
31 °
West Thumb, Monday, 16 November
Climate normal for this date — 60-year average.
Average high31°
Average low20°
Average precipitation0.1 in
Chance of precipitation45%
Record high47° (1999)
Record low-2° (2014)
Tue, 1730° / 19°0.1
30 °
West Thumb, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high30°
Average low19°
Average precipitation0.1 in
Chance of precipitation53%
Record high49° (1999)
Record low2° (1968)
Wed, 1829° / 19°0.11
29 °
West Thumb, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high29°
Average low19°
Average precipitation0.11 in
Chance of precipitation45%
Record high42° (2008)
Record low-4° (2022)
Thu, 1929° / 19°0.08
29 °
West Thumb, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high29°
Average low19°
Average precipitation0.08 in
Chance of precipitation45%
Record high39° (2008)
Record low-1° (1985)
Fri, 2030° / 17°0.11
30 °
West Thumb, Friday, 20 November
Climate normal for this date — 60-year average.
Average high30°
Average low17°
Average precipitation0.11 in
Chance of precipitation43%
Record high42° (1989)
Record low-6° (1977)
Sat, 2129° / 17°0.09
29 °
West Thumb, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high29°
Average low17°
Average precipitation0.09 in
Chance of precipitation47%
Record high39° (1974)
Record low-4° (1977)
Sun, 2228° / 17°0.12
28 °
West Thumb, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high28°
Average low17°
Average precipitation0.12 in
Chance of precipitation50%
Record high40° (2024)
Record low-3° (1994)
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 West Thumb, WY 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 West Thumb, WY 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.