Monthly outlook for Byrne, MT: average high 52.4°, average low 35.1°. That is 5.5° above the climate normal for October. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 5 days and 0.9 inches. The warmest day looks like 22 October (63.9°), the coolest 30 October (28.5°).
52.4°/35.1°
Average high / low
+5.5°
Above normal
4 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
22 October – 31 October
49.4°
43.9°
+3°
1 November – 10 November
57.4°
38.9°
+10.3°
11 November – 20 November
at normal
34.9°
—
October records over 66 years
78.4°3 October 2010All-time high
-16.4°29 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Springtown (11 mi).
Fri, 2344° / 37°0.45
44 °
Byrne, Friday, 23 October
Rain. High 44°, low 37°.
Pressure29.88 inHg
Wind10.5 mph W
Humidity97%
Visibility2.4 mi
Dew point43°
Sat, 2455° / 34°0
55 °
Byrne, Saturday, 24 October
Partly cloudy. High 55°, low 34°.
Pressure30.24 inHg
Wind0.9 mph E
Humidity61%
Visibility6.2 mi
Dew point32°
Sun, 2556° / 35°0
56 °
Byrne, Sunday, 25 October
Partly cloudy. High 56°, low 35°.
Pressure30.18 inHg
Wind3.2 mph E
Humidity56%
Visibility6.2 mi
Dew point28°
Mon, 2655° / 33°0
55 °
Byrne, Monday, 26 October
Overcast. High 55°, low 33°.
Pressure30.12 inHg
Wind3.6 mph SE
Humidity61%
Visibility—
Dew point33°
Tue, 2740° / 36°0.59
40 °
Byrne, Tuesday, 27 October
Snow. High 40°, low 36°.
Pressure30.12 inHg
Wind4.8 mph W
Humidity95%
Visibility—
Dew point36°
Wed, 2838° / 31°0.09
38 °
Byrne, Wednesday, 28 October
Snow. High 38°, low 31°.
Pressure30.24 inHg
Wind5 mph E
Humidity81%
Visibility—
Dew point31°
Thu, 2942° / 30°0.02
42 °
Byrne, Thursday, 29 October
Light snow. High 42°, low 30°.
Pressure30.09 inHg
Wind5.6 mph W
Humidity75%
Visibility—
Dew point31°
Fri, 3049° / 28°0
49 °
Byrne, Friday, 30 October
Clear. High 49°, low 28°.
Pressure29.88 inHg
Wind7 mph W
Humidity55%
Visibility—
Dew point28°
Sat, 3151° / 31°0
51 °
Byrne, Saturday, 31 October
Overcast. High 51°, low 31°.
Pressure29.97 inHg
Wind4.9 mph SW
Humidity54%
Visibility—
Dew point28°
Sun, 0154° / 32°0
54 °
Byrne, Sunday, 1 November
Clear. High 54°, low 32°.
Pressure30.06 inHg
Wind2.6 mph SW
Humidity45%
Visibility—
Dew point26°
Mon, 0256° / 33°0
56 °
Byrne, Monday, 2 November
Overcast. High 56°, low 33°.
Pressure30.03 inHg
Wind2.5 mph S
Humidity39%
Visibility—
Dew point24°
Tue, 0360° / 37°0
60 °
Byrne, Tuesday, 3 November
Partly cloudy. High 60°, low 37°.
Pressure30.06 inHg
Wind4 mph S
Humidity41%
Visibility—
Dew point28°
Wed, 0455° / 43°0.04
55 °
Byrne, Wednesday, 4 November
Light rain. High 55°, low 43°.
Pressure30.06 inHg
Wind4.9 mph W
Humidity79%
Visibility—
Dew point44°
Thu, 0561° / 40°0
61 °
Byrne, Thursday, 5 November
Overcast. High 61°, low 40°.
Pressure29.97 inHg
Wind4.1 mph S
Humidity48%
Visibility—
Dew point34°
Fri, 0659° / 42°0
59 °
Byrne, Friday, 6 November
Overcast. High 59°, low 42°.
Pressure29.88 inHg
Wind3.7 mph SE
Humidity47%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 0738° / 23°0.07
38 °
Byrne, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high38°
Average low23°
Average precipitation0.07 in
Chance of precipitation47%
Record high53° (2010)
Record low-1° (1961)
Sun, 0837° / 21°0.06
37 °
Byrne, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high37°
Average low21°
Average precipitation0.06 in
Chance of precipitation38%
Record high57° (2016)
Record low-11° (1994)
Mon, 0937° / 21°0.06
37 °
Byrne, Monday, 9 November
Climate normal for this date — 60-year average.
Average high37°
Average low21°
Average precipitation0.06 in
Chance of precipitation33%
Record high57° (2016)
Record low-7° (1986)
Tue, 1036° / 20°0.04
36 °
Byrne, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high36°
Average low20°
Average precipitation0.04 in
Chance of precipitation30%
Record high55° (2016)
Record low-33° (1986)
Wed, 1136° / 19°0.05
36 °
Byrne, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high36°
Average low19°
Average precipitation0.05 in
Chance of precipitation28%
Record high56° (2016)
Record low-20° (2000)
Thu, 1237° / 20°0.05
37 °
Byrne, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high37°
Average low20°
Average precipitation0.05 in
Chance of precipitation33%
Record high58° (1999)
Record low-15° (1986)
Fri, 1336° / 20°0.07
36 °
Byrne, Friday, 13 November
Climate normal for this date — 60-year average.
Average high36°
Average low20°
Average precipitation0.07 in
Chance of precipitation40%
Record high57° (2025)
Record low-6° (2000)
Sat, 1435° / 20°0.06
35 °
Byrne, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high35°
Average low20°
Average precipitation0.06 in
Chance of precipitation33%
Record high54° (1999)
Record low-10° (2000)
Sun, 1536° / 19°0.02
36 °
Byrne, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high36°
Average low19°
Average precipitation0.02 in
Chance of precipitation13%
Record high56° (2021)
Record low-4° (2014)
Mon, 1636° / 20°0.06
36 °
Byrne, Monday, 16 November
Climate normal for this date — 60-year average.
Average high36°
Average low20°
Average precipitation0.06 in
Chance of precipitation35%
Record high49° (2001)
Record low-16° (1961)
Tue, 1734° / 19°0.06
34 °
Byrne, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high34°
Average low19°
Average precipitation0.06 in
Chance of precipitation47%
Record high51° (1976)
Record low-15° (1968)
Wed, 1833° / 18°0.07
33 °
Byrne, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high33°
Average low18°
Average precipitation0.07 in
Chance of precipitation43%
Record high51° (2008)
Record low-11° (2022)
Thu, 1933° / 17°0.07
33 °
Byrne, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high33°
Average low17°
Average precipitation0.07 in
Chance of precipitation28%
Record high48° (1989)
Record low-10° (1985)
Fri, 2033° / 17°0.05
33 °
Byrne, Friday, 20 November
Climate normal for this date — 60-year average.
Average high33°
Average low17°
Average precipitation0.05 in
Chance of precipitation32%
Record high48° (1989)
Record low-9° (1977)
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 Byrne, 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 Byrne, 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.