Monthly outlook for West Thumb, WY: average high 39.4°, average low 25.5°. That is 2.6° above the climate normal for October. Precipitation is expected on 8 days (about 1.2 inches), against a normal of 7 days and 1.5 inches. The warmest day looks like 30 October (47°), the coolest 29 October (18.6°).
39.4°/25.5°
Average high / low
+2.6°
Above normal
8 / 7
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
29 October – 7 November
40.6°
35.7°
+2.7°
8 November – 17 November
37.3°
32°
+2.9°
18 November – 27 November
at normal
27.1°
—
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).
Fri, 3047° / 27°0.15
47 °
West Thumb, Friday, 30 October
Snow. High 47°, low 27°.
Pressure29.91 inHg
Wind9.1 mph S
Humidity57%
Visibility6.2 mi
Dew point26°
Sat, 3141° / 32°0.04
41 °
West Thumb, Saturday, 31 October
Light rain. High 41°, low 32°.
Pressure29.97 inHg
Wind7.4 mph SW
Humidity80%
Visibility6.2 mi
Dew point35°
Sun, 0140° / 31°0.36
40 °
West Thumb, Sunday, 1 November
Snow. High 40°, low 31°.
Pressure29.88 inHg
Wind4.4 mph E
Humidity94%
Visibility6.2 mi
Dew point36°
Mon, 0232° / 24°0.12
32 °
West Thumb, Monday, 2 November
Snow. High 32°, low 24°.
Pressure30.12 inHg
Wind11.6 mph N
Humidity92%
Visibility—
Dew point29°
Tue, 0339° / 24°0
39 °
West Thumb, Tuesday, 3 November
Mostly clear. High 39°, low 24°.
Pressure30.30 inHg
Wind6.9 mph W
Humidity73%
Visibility—
Dew point27°
Wed, 0443° / 23°0
43 °
West Thumb, Wednesday, 4 November
Overcast. High 43°, low 23°.
Pressure30.09 inHg
Wind3.8 mph E
Humidity64%
Visibility—
Dew point25°
Thu, 0545° / 26°0
45 °
West Thumb, Thursday, 5 November
Overcast. High 45°, low 26°.
Pressure29.88 inHg
Wind6.2 mph SW
Humidity54%
Visibility—
Dew point24°
Fri, 0638° / 26°0
38 °
West Thumb, Friday, 6 November
Overcast. High 38°, low 26°.
Pressure29.91 inHg
Wind9.8 mph SW
Humidity60%
Visibility—
Dew point24°
Sat, 0738° / 25°0
38 °
West Thumb, Saturday, 7 November
Overcast. High 38°, low 25°.
Pressure30.18 inHg
Wind8.6 mph W
Humidity54%
Visibility—
Dew point19°
Sun, 0842° / 26°0
42 °
West Thumb, Sunday, 8 November
Overcast. High 42°, low 26°.
Pressure30.18 inHg
Wind13.8 mph SW
Humidity41%
Visibility—
Dew point16°
Mon, 0940° / 28°0.09
40 °
West Thumb, Monday, 9 November
Light snow. High 40°, low 28°.
Pressure30.18 inHg
Wind15.7 mph SW
Humidity66%
Visibility—
Dew point28°
Tue, 1046° / 27°0
46 °
West Thumb, Tuesday, 10 November
Overcast. High 46°, low 27°.
Pressure30.00 inHg
Wind8.4 mph S
Humidity52%
Visibility—
Dew point24°
Wed, 1139° / 28°0.14
39 °
West Thumb, Wednesday, 11 November
Snow. High 39°, low 28°.
Pressure29.68 inHg
Wind11.4 mph S
Humidity95%
Visibility—
Dew point34°
Thu, 1230° / 24°0.17
30 °
West Thumb, Thursday, 12 November
Light snow. High 30°, low 24°.
Pressure29.44 inHg
Wind17.4 mph SW
Humidity77%
Visibility—
Dew point23°
Fri, 1327° / 21°0.13
27 °
West Thumb, Friday, 13 November
Light snow. High 27°, low 21°.
Pressure29.77 inHg
Wind19.1 mph SW
Humidity79%
Visibility—
Dew point20°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Mon, 2327° / 15°0.09
27 °
West Thumb, Monday, 23 November
Climate normal for this date — 60-year average.
Average high27°
Average low15°
Average precipitation0.09 in
Chance of precipitation48%
Record high41° (2017)
Record low-8° (2003)
Tue, 2426° / 15°0.12
26 °
West Thumb, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high26°
Average low15°
Average precipitation0.12 in
Chance of precipitation50%
Record high38° (2017)
Record low-6° (1993)
Wed, 2526° / 14°0.14
26 °
West Thumb, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high26°
Average low14°
Average precipitation0.14 in
Chance of precipitation50%
Record high38° (1960)
Record low-14° (1993)
Thu, 2624° / 13°0.11
24 °
West Thumb, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high24°
Average low13°
Average precipitation0.11 in
Chance of precipitation47%
Record high43° (2017)
Record low-8° (1993)
Fri, 2724° / 12°0.07
24 °
West Thumb, Friday, 27 November
Climate normal for this date — 60-year average.
Average high24°
Average low12°
Average precipitation0.07 in
Chance of precipitation42%
Record high38° (1998)
Record low-14° (1976)
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.