Monthly outlook for West Thumb, WY: average high 34.5°, average low 20.5°. That is 2.9° above the climate normal for November. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 7 days and 1.6 inches. The warmest day looks like 12 November (50°), the coolest 23 November (5.7°).
34.5°/20.5°
Average high / low
+2.9°
Above normal
2 / 7
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 November – 20 November
38.1°
30.9°
+4°
21 November – 30 November
28.6°
25.7°
+1.6°
1 December – 10 December
at normal
22.9°
—
November records over 66 years
53.8°15 November 1999All-time high
-14.3°25 November 1993All-time low
Climate normals and records are computed from the nearest reference point — Lake (13 mi).
Thu, 1250° / 26°0
50 °
West Thumb, Thursday, 12 November
Overcast. High 50°, low 26°.
Pressure30.09 inHg
Wind3.1 mph S
Humidity48%
Visibility6.2 mi
Dew point25°
Fri, 1345° / 31°0
45 °
West Thumb, Friday, 13 November
Overcast. High 45°, low 31°.
Pressure29.80 inHg
Wind9.7 mph SW
Humidity53%
Visibility6.2 mi
Dew point22°
Sat, 1442° / 30°0
42 °
West Thumb, Saturday, 14 November
Partly cloudy. High 42°, low 30°.
Pressure29.68 inHg
Wind6.3 mph SW
Humidity62%
Visibility6.2 mi
Dew point26°
Sun, 1535° / 27°0
35 °
West Thumb, Sunday, 15 November
Overcast. High 35°, low 27°.
Pressure30.09 inHg
Wind8.6 mph SW
Humidity88%
Visibility—
Dew point29°
Mon, 1641° / 27°0
41 °
West Thumb, Monday, 16 November
Overcast. High 41°, low 27°.
Pressure30.00 inHg
Wind7.1 mph S
Humidity59%
Visibility—
Dew point24°
Tue, 1736° / 28°0.04
36 °
West Thumb, Tuesday, 17 November
Light snow. High 36°, low 28°.
Pressure29.83 inHg
Wind7 mph SW
Humidity67%
Visibility—
Dew point24°
Wed, 1829° / 21°0.04
29 °
West Thumb, Wednesday, 18 November
Light snow. High 29°, low 21°.
Pressure29.88 inHg
Wind13.6 mph SW
Humidity69%
Visibility—
Dew point20°
Thu, 1924° / 18°0.08
24 °
West Thumb, Thursday, 19 November
Light snow. High 24°, low 18°.
Pressure30.03 inHg
Wind8.3 mph W
Humidity83%
Visibility—
Dew point19°
Fri, 2030° / 15°0
30 °
West Thumb, Friday, 20 November
Overcast. High 30°, low 15°.
Pressure30.42 inHg
Wind8.6 mph SW
Humidity70%
Visibility—
Dew point16°
Sat, 2123° / 9°0.04
23 °
West Thumb, Saturday, 21 November
Light snow. High 23°, low 9°.
Pressure30.50 inHg
Wind13.1 mph N
Humidity51%
Visibility—
Dew point6°
Sun, 2225° / 6°0
25 °
West Thumb, Sunday, 22 November
Overcast. High 25°, low 6°.
Pressure30.53 inHg
Wind4.2 mph S
Humidity54%
Visibility—
Dew point4°
Mon, 2329° / 6°0
29 °
West Thumb, Monday, 23 November
Partly cloudy. High 29°, low 6°.
Pressure30.42 inHg
Wind7.3 mph SW
Humidity46%
Visibility—
Dew point5°
Tue, 2433° / 16°0
33 °
West Thumb, Tuesday, 24 November
Overcast. High 33°, low 16°.
Pressure30.15 inHg
Wind10 mph SW
Humidity52%
Visibility—
Dew point15°
Wed, 2532° / 19°0
32 °
West Thumb, Wednesday, 25 November
Partly cloudy. High 32°, low 19°.
Pressure30.12 inHg
Wind8.9 mph SW
Humidity62%
Visibility—
Dew point18°
Thu, 2630° / 25°0
30 °
West Thumb, Thursday, 26 November
Overcast. High 30°, low 25°.
Pressure30.21 inHg
Wind9.8 mph SW
Humidity77%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sat, 2825° / 13°0.08
25 °
West Thumb, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high25°
Average low13°
Average precipitation0.08 in
Chance of precipitation47%
Record high36° (1966)
Record low-3° (1976)
Sun, 2925° / 13°0.07
25 °
West Thumb, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high25°
Average low13°
Average precipitation0.07 in
Chance of precipitation45%
Record high40° (1999)
Record low-5° (2006)
Mon, 3024° / 13°0.1
24 °
West Thumb, Monday, 30 November
Climate normal for this date — 60-year average.
Average high24°
Average low13°
Average precipitation0.1 in
Chance of precipitation43%
Record high41° (1999)
Record low-8° (1975)
Tue, 0124° / 14°0.12
24 °
West Thumb, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high24°
Average low14°
Average precipitation0.12 in
Chance of precipitation63%
Record high37° (1973)
Record low-5° (1991)
Wed, 0225° / 14°0.16
25 °
West Thumb, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high25°
Average low14°
Average precipitation0.16 in
Chance of precipitation53%
Record high37° (2024)
Record low-8° (2009)
Thu, 0324° / 13°0.13
24 °
West Thumb, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high24°
Average low13°
Average precipitation0.13 in
Chance of precipitation52%
Record high39° (2024)
Record low-14° (2009)
Fri, 0424° / 13°0.11
24 °
West Thumb, Friday, 4 December
Climate normal for this date — 60-year average.
Average high24°
Average low13°
Average precipitation0.11 in
Chance of precipitation42%
Record high41° (1987)
Record low-13° (2013)
Sat, 0523° / 12°0.09
23 °
West Thumb, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high23°
Average low12°
Average precipitation0.09 in
Chance of precipitation48%
Record high37° (1987)
Record low-22° (1972)
Sun, 0622° / 11°0.09
22 °
West Thumb, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high22°
Average low11°
Average precipitation0.09 in
Chance of precipitation48%
Record high38° (1987)
Record low-16° (2013)
Mon, 0722° / 11°0.1
22 °
West Thumb, Monday, 7 December
Climate normal for this date — 60-year average.
Average high22°
Average low11°
Average precipitation0.1 in
Chance of precipitation52%
Record high34° (1965)
Record low-19° (2009)
Tue, 0821° / 10°0.09
21 °
West Thumb, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high21°
Average low10°
Average precipitation0.09 in
Chance of precipitation48%
Record high37° (1981)
Record low-18° (1978)
Wed, 0921° / 10°0.07
21 °
West Thumb, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high21°
Average low10°
Average precipitation0.07 in
Chance of precipitation42%
Record high39° (1981)
Record low-15° (2013)
Thu, 1022° / 10°0.09
22 °
West Thumb, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high22°
Average low10°
Average precipitation0.09 in
Chance of precipitation42%
Record high36° (1965)
Record low-18° (1972)
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.