Monthly outlook for Byrne, MT: average high 48.4°, average low 33.7°. That is 4.9° above the climate normal for October. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 5 days and 0.9 inches. The warmest day looks like 6 November (56.7°), the coolest 29 October (29.5°).
48.4°/33.7°
Average high / low
+4.9°
Above normal
4 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
27 October – 5 November
47.5°
41.3°
+3.5°
6 November – 15 November
49.9°
36.7°
+7.4°
16 November – 25 November
at normal
32.1°
—
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).
Wed, 2839° / 32°0.02
39 °
Byrne, Wednesday, 28 October
Snow. High 39°, low 32°.
Pressure30.00 inHg
Wind4.5 mph W
Humidity73%
Visibility6.2 mi
Dew point31°
Thu, 2949° / 30°0
49 °
Byrne, Thursday, 29 October
Partly cloudy. High 49°, low 30°.
Pressure30.09 inHg
Wind1.1 mph NE
Humidity68%
Visibility6.2 mi
Dew point28°
Fri, 3051° / 33°0.07
51 °
Byrne, Friday, 30 October
Snow. High 51°, low 33°.
Pressure29.97 inHg
Wind1.4 mph E
Humidity69%
Visibility6.2 mi
Dew point32°
Sat, 3152° / 35°0.02
52 °
Byrne, Saturday, 31 October
Light rain. High 52°, low 35°.
Pressure30.00 inHg
Wind2.7 mph SE
Humidity80%
Visibility—
Dew point39°
Sun, 0139° / 32°0.3
39 °
Byrne, Sunday, 1 November
Rain. High 39°, low 32°.
Pressure30.00 inHg
Wind5.8 mph W
Humidity100%
Visibility—
Dew point38°
Mon, 0246° / 30°0
46 °
Byrne, Monday, 2 November
Mostly clear. High 46°, low 30°.
Pressure30.50 inHg
Wind4.3 mph W
Humidity58%
Visibility—
Dew point26°
Tue, 0354° / 30°0
54 °
Byrne, Tuesday, 3 November
Overcast. High 54°, low 30°.
Pressure30.36 inHg
Wind3.3 mph SE
Humidity34%
Visibility—
Dew point18°
Wed, 0454° / 36°0
54 °
Byrne, Wednesday, 4 November
Overcast. High 54°, low 36°.
Pressure30.09 inHg
Wind2.6 mph NW
Humidity40%
Visibility—
Dew point24°
Thu, 0552° / 36°0
52 °
Byrne, Thursday, 5 November
Overcast. High 52°, low 36°.
Pressure30.15 inHg
Wind2.1 mph SE
Humidity44%
Visibility—
Dew point25°
Fri, 0657° / 36°0
57 °
Byrne, Friday, 6 November
Mostly clear. High 57°, low 36°.
Pressure30.00 inHg
Wind4.1 mph NW
Humidity45%
Visibility—
Dew point29°
Sat, 0753° / 39°0
53 °
Byrne, Saturday, 7 November
Overcast. High 53°, low 39°.
Pressure29.85 inHg
Wind2.3 mph SE
Humidity52%
Visibility—
Dew point31°
Sun, 0853° / 40°0
53 °
Byrne, Sunday, 8 November
Overcast. High 53°, low 40°.
Pressure29.91 inHg
Wind7.6 mph W
Humidity64%
Visibility—
Dew point38°
Mon, 0947° / 34°0.07
47 °
Byrne, Monday, 9 November
Light rain. High 47°, low 34°.
Pressure30.09 inHg
Wind4.4 mph W
Humidity73%
Visibility—
Dew point35°
Tue, 1045° / 31°0.03
45 °
Byrne, Tuesday, 10 November
Light snow. High 45°, low 31°.
Pressure30.00 inHg
Wind4.6 mph NW
Humidity62%
Visibility—
Dew point28°
Wed, 1146° / 34°0
46 °
Byrne, Wednesday, 11 November
Overcast. High 46°, low 34°.
Pressure30.00 inHg
Wind4.3 mph W
Humidity68%
Visibility—
Dew point31°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sat, 2132° / 15°0.05
32 °
Byrne, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high32°
Average low15°
Average precipitation0.05 in
Chance of precipitation32%
Record high50° (2002)
Record low-15° (1977)
Sun, 2231° / 15°0.06
31 °
Byrne, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high31°
Average low15°
Average precipitation0.06 in
Chance of precipitation33%
Record high45° (2017)
Record low-30° (1970)
Mon, 2331° / 14°0.05
31 °
Byrne, Monday, 23 November
Climate normal for this date — 60-year average.
Average high31°
Average low14°
Average precipitation0.05 in
Chance of precipitation38%
Record high48° (2017)
Record low-19° (1993)
Tue, 2430° / 16°0.09
30 °
Byrne, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high30°
Average low16°
Average precipitation0.09 in
Chance of precipitation43%
Record high43° (1976)
Record low-16° (2010)
Wed, 2529° / 15°0.1
29 °
Byrne, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high29°
Average low15°
Average precipitation0.1 in
Chance of precipitation50%
Record high46° (2022)
Record low-16° (2010)
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.