Monthly outlook for Altamont, WY: average high 54.4°, average low 36.8°. That is 3.2° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 21 October (60.2°), the coolest 24 October (30.8°).
54.4°/36.8°
Average high / low
+3.2°
Above normal
2 / 4
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
55.1°
51.1°
+2.2°
29 October – 7 November
53.1°
44.5°
+4.8°
8 November – 17 November
at normal
39.9°
—
October records over 66 years
79°4 October 2024All-time high
-11.9°30 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Evanston (10 mi).
Tue, 2060° / 39°0.01
60 °
Altamont, Tuesday, 20 October
Light rain. High 60°, low 39°.
Pressure30.12 inHg
Wind3.9 mph W
Humidity61%
Visibility6.2 mi
Dew point41°
Wed, 2160° / 37°0.06
60 °
Altamont, Wednesday, 21 October
Light rain. High 60°, low 37°.
Pressure30.09 inHg
Wind5.1 mph NE
Humidity59%
Visibility6.2 mi
Dew point43°
Thu, 2257° / 41°0.02
57 °
Altamont, Thursday, 22 October
Light rain. High 57°, low 41°.
Pressure30.03 inHg
Wind11.9 mph NE
Humidity71%
Visibility6.2 mi
Dew point45°
Fri, 2351° / 38°0.1
51 °
Altamont, Friday, 23 October
Light rain. High 51°, low 38°.
Pressure29.85 inHg
Wind19.9 mph SW
Humidity50%
Visibility6.2 mi
Dew point31°
Sat, 2448° / 31°0
48 °
Altamont, Saturday, 24 October
Partly cloudy. High 48°, low 31°.
Pressure30.12 inHg
Wind12.3 mph E
Humidity70%
Visibility—
Dew point34°
Sun, 2550° / 35°0.03
50 °
Altamont, Sunday, 25 October
Light rain. High 50°, low 35°.
Pressure30.24 inHg
Wind10.2 mph NE
Humidity70%
Visibility—
Dew point32°
Mon, 2659° / 37°0
59 °
Altamont, Monday, 26 October
Clear. High 59°, low 37°.
Pressure30.12 inHg
Wind8.3 mph W
Humidity18%
Visibility—
Dew point10°
Tue, 2750° / 34°0
50 °
Altamont, Tuesday, 27 October
Overcast. High 50°, low 34°.
Pressure30.27 inHg
Wind10.7 mph NE
Humidity38%
Visibility—
Dew point19°
Wed, 2859° / 33°0
59 °
Altamont, Wednesday, 28 October
Overcast. High 59°, low 33°.
Pressure30.12 inHg
Wind15.8 mph W
Humidity29%
Visibility—
Dew point19°
Thu, 2957° / 40°0
57 °
Altamont, Thursday, 29 October
Overcast. High 57°, low 40°.
Pressure29.97 inHg
Wind16 mph W
Humidity39%
Visibility—
Dew point28°
Fri, 3050° / 41°0.02
50 °
Altamont, Friday, 30 October
Light rain. High 50°, low 41°.
Pressure29.88 inHg
Wind11.3 mph SW
Humidity60%
Visibility—
Dew point36°
Sat, 3151° / 40°0.02
51 °
Altamont, Saturday, 31 October
Light rain. High 51°, low 40°.
Pressure29.91 inHg
Wind15.7 mph W
Humidity58%
Visibility—
Dew point33°
Sun, 0152° / 35°0
52 °
Altamont, Sunday, 1 November
Clear. High 52°, low 35°.
Pressure30.18 inHg
Wind9.8 mph W
Humidity44%
Visibility—
Dew point26°
Mon, 0255° / 34°0
55 °
Altamont, Monday, 2 November
Mostly clear. High 55°, low 34°.
Pressure30.24 inHg
Wind10.5 mph W
Humidity35%
Visibility—
Dew point22°
Tue, 0355° / 38°0
55 °
Altamont, Tuesday, 3 November
Overcast. High 55°, low 38°.
Pressure29.97 inHg
Wind11.6 mph W
Humidity34%
Visibility—
Dew point22°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0445° / 24°0.02
45 °
Altamont, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high45°
Average low24°
Average precipitation0.02 in
Chance of precipitation15%
Record high62° (2020)
Record low-5° (1994)
Thu, 0545° / 26°0.04
45 °
Altamont, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.04 in
Chance of precipitation28%
Record high63° (1980)
Record low-1° (1961)
Fri, 0644° / 26°0.03
44 °
Altamont, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.03 in
Chance of precipitation22%
Record high64° (1999)
Record low-5° (1996)
Sat, 0744° / 25°0.05
44 °
Altamont, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low25°
Average precipitation0.05 in
Chance of precipitation20%
Record high64° (1999)
Record low-6° (2003)
Sun, 0842° / 24°0.07
42 °
Altamont, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high42°
Average low24°
Average precipitation0.07 in
Chance of precipitation35%
Record high59° (2006)
Record low2° (2000)
Mon, 0942° / 23°0.09
42 °
Altamont, Monday, 9 November
Climate normal for this date — 60-year average.
Average high42°
Average low23°
Average precipitation0.09 in
Chance of precipitation38%
Record high60° (2016)
Record low-3° (1966)
Tue, 1040° / 22°0.06
40 °
Altamont, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high40°
Average low22°
Average precipitation0.06 in
Chance of precipitation37%
Record high59° (2005)
Record low3° (1985)
Wed, 1140° / 22°0.04
40 °
Altamont, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high40°
Average low22°
Average precipitation0.04 in
Chance of precipitation20%
Record high60° (1999)
Record low-6° (2000)
Thu, 1240° / 21°0.07
40 °
Altamont, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high40°
Average low21°
Average precipitation0.07 in
Chance of precipitation25%
Record high63° (1999)
Record low-4° (2000)
Fri, 1340° / 22°0.04
40 °
Altamont, Friday, 13 November
Climate normal for this date — 60-year average.
Average high40°
Average low22°
Average precipitation0.04 in
Chance of precipitation32%
Record high61° (1999)
Record low-2° (1972)
Sat, 1439° / 21°0.07
39 °
Altamont, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high39°
Average low21°
Average precipitation0.07 in
Chance of precipitation25%
Record high61° (1999)
Record low-8° (1978)
Sun, 1539° / 19°0.02
39 °
Altamont, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high39°
Average low19°
Average precipitation0.02 in
Chance of precipitation12%
Record high63° (1999)
Record low-11° (1978)
Mon, 1639° / 20°0.04
39 °
Altamont, Monday, 16 November
Climate normal for this date — 60-year average.
Average high39°
Average low20°
Average precipitation0.04 in
Chance of precipitation23%
Record high61° (1999)
Record low-5° (2014)
Tue, 1738° / 19°0.06
38 °
Altamont, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high38°
Average low19°
Average precipitation0.06 in
Chance of precipitation35%
Record high57° (1999)
Record low-5° (2000)
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 Altamont, 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 Altamont, 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.