Monthly outlook for Bighorn, MT: average high 59.2°, average low 39.4°. That is 1.5° above the climate normal for October. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (72.5°), the coolest 30 October (30.3°).
59.2°/39.4°
Average high / low
+1.5°
Above normal
4 / 3
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
63°
58.9°
+2.3°
28 October – 6 November
52.8°
52.2°
+0.4°
7 November – 16 November
at normal
47.1°
—
October records over 66 years
93°1 October 2011All-time high
-20°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Hysham (14 mi).
Mon, 1970° / 40°0
70 °
Bighorn, Monday, 19 October
Clear. High 70°, low 40°.
Pressure30.00 inHg
Wind3.5 mph SW
Humidity45%
Visibility6.2 mi
Dew point37°
Tue, 2068° / 41°0
68 °
Bighorn, Tuesday, 20 October
Mostly clear. High 68°, low 41°.
Pressure30.03 inHg
Wind1.5 mph NW
Humidity50%
Visibility6.2 mi
Dew point43°
Wed, 2168° / 41°0
68 °
Bighorn, Wednesday, 21 October
Clear. High 68°, low 41°.
Pressure30.12 inHg
Wind0.7 mph S
Humidity64%
Visibility6.2 mi
Dew point46°
Thu, 2272° / 44°0
72 °
Bighorn, Thursday, 22 October
Clear. High 72°, low 44°.
Pressure29.91 inHg
Wind5.3 mph SW
Humidity52%
Visibility6.2 mi
Dew point47°
Fri, 2369° / 47°0.09
69 °
Bighorn, Friday, 23 October
Light rain. High 69°, low 47°.
Pressure29.53 inHg
Wind9.4 mph NW
Humidity59%
Visibility—
Dew point48°
Sat, 2454° / 42°0.02
54 °
Bighorn, Saturday, 24 October
Light rain. High 54°, low 42°.
Pressure30.12 inHg
Wind13.2 mph N
Humidity42%
Visibility—
Dew point30°
Sun, 2550° / 35°0
50 °
Bighorn, Sunday, 25 October
Overcast. High 50°, low 35°.
Pressure30.12 inHg
Wind7.4 mph SE
Humidity39%
Visibility—
Dew point22°
Mon, 2651° / 36°0
51 °
Bighorn, Monday, 26 October
Mostly clear. High 51°, low 36°.
Pressure30.15 inHg
Wind11.3 mph NW
Humidity56%
Visibility—
Dew point29°
Tue, 2760° / 39°0
60 °
Bighorn, Tuesday, 27 October
Partly cloudy. High 60°, low 39°.
Pressure29.80 inHg
Wind4.5 mph SE
Humidity37%
Visibility—
Dew point27°
Wed, 2865° / 44°0
65 °
Bighorn, Wednesday, 28 October
Overcast. High 65°, low 44°.
Pressure29.59 inHg
Wind5.3 mph E
Humidity24%
Visibility—
Dew point21°
Thu, 2953° / 34°0.7
53 °
Bighorn, Thursday, 29 October
Snow. High 53°, low 34°.
Pressure29.32 inHg
Wind31.1 mph NW
Humidity84%
Visibility—
Dew point41°
Fri, 3038° / 30°0.1
38 °
Bighorn, Friday, 30 October
Snow. High 38°, low 30°.
Pressure29.91 inHg
Wind31 mph NW
Humidity62%
Visibility—
Dew point23°
Sat, 3150° / 31°0
50 °
Bighorn, Saturday, 31 October
Partly cloudy. High 50°, low 31°.
Pressure29.94 inHg
Wind18.1 mph SW
Humidity44%
Visibility—
Dew point22°
Sun, 0156° / 40°0.04
56 °
Bighorn, Sunday, 1 November
Light rain. High 56°, low 40°.
Pressure29.83 inHg
Wind20 mph W
Humidity40%
Visibility—
Dew point26°
Mon, 0254° / 44°0
54 °
Bighorn, Monday, 2 November
Overcast. High 54°, low 44°.
Pressure29.47 inHg
Wind13 mph SW
Humidity42%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0351° / 33°0.03
51 °
Bighorn, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.03 in
Chance of precipitation15%
Record high70° (1981)
Record low-17° (1991)
Wed, 0453° / 33°0.03
53 °
Bighorn, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low33°
Average precipitation0.03 in
Chance of precipitation15%
Record high71° (1983)
Record low10° (1995)
Thu, 0552° / 33°0.03
52 °
Bighorn, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low33°
Average precipitation0.03 in
Chance of precipitation23%
Record high73° (2020)
Record low4° (1961)
Fri, 0650° / 31°0.03
50 °
Bighorn, Friday, 6 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.03 in
Chance of precipitation17%
Record high73° (2010)
Record low10° (1991)
Sat, 0749° / 31°0.02
49 °
Bighorn, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.02 in
Chance of precipitation13%
Record high73° (1999)
Record low-2° (1991)
Sun, 0849° / 30°0.04
49 °
Bighorn, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.04 in
Chance of precipitation22%
Record high77° (1999)
Record low3° (1966)
Mon, 0947° / 29°0.07
47 °
Bighorn, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.07 in
Chance of precipitation22%
Record high69° (2016)
Record low-1° (1966)
Tue, 1046° / 27°0.05
46 °
Bighorn, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low27°
Average precipitation0.05 in
Chance of precipitation18%
Record high71° (2007)
Record low-19° (1986)
Wed, 1145° / 26°0.02
45 °
Bighorn, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.02 in
Chance of precipitation23%
Record high71° (1990)
Record low-7° (2019)
Thu, 1247° / 27°0.02
47 °
Bighorn, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high47°
Average low27°
Average precipitation0.02 in
Chance of precipitation15%
Record high76° (1999)
Record low-16° (1986)
Fri, 1347° / 29°0.03
47 °
Bighorn, Friday, 13 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high71° (1990)
Record low-21° (1986)
Sat, 1447° / 28°0.02
47 °
Bighorn, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.02 in
Chance of precipitation25%
Record high70° (1999)
Record low0° (2014)
Sun, 1547° / 28°0.01
47 °
Bighorn, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.01 in
Chance of precipitation10%
Record high69° (2021)
Record low0° (2014)
Mon, 1648° / 29°0.02
48 °
Bighorn, Monday, 16 November
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.02 in
Chance of precipitation13%
Record high68° (2001)
Record low1° (1978)
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 Bighorn, MT 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 Bighorn, MT 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.