Monthly outlook for Byrne, MT: average high 55.6°, average low 34.5°. That is 6.5° above the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 5 days and 0.9 inches. The warmest day looks like 22 October (67.3°), the coolest 27 October (23.4°).
55.6°/34.5°
Average high / low
+6.5°
Above normal
2 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
55.4°
45.7°
+5.4°
30 October – 8 November
55.9°
39.7°
+9°
9 November – 18 November
at normal
35.6°
—
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, 2163° / 36°0
63 °
Byrne, Wednesday, 21 October
Partly cloudy. High 63°, low 36°.
Pressure30.03 inHg
Wind1.2 mph E
Humidity44%
Visibility6.2 mi
Dew point36°
Thu, 2267° / 41°0.03
67 °
Byrne, Thursday, 22 October
Light rain. High 67°, low 41°.
Pressure29.88 inHg
Wind1.3 mph E
Humidity55%
Visibility6.2 mi
Dew point42°
Fri, 2349° / 43°0.7
49 °
Byrne, Friday, 23 October
Rain. High 49°, low 43°.
Pressure29.94 inHg
Wind9.4 mph W
Humidity97%
Visibility2.9 mi
Dew point41°
Sat, 2452° / 35°0.04
52 °
Byrne, Saturday, 24 October
Light rain. High 52°, low 35°.
Pressure30.30 inHg
Wind4.4 mph SE
Humidity64%
Visibility—
Dew point33°
Sun, 2557° / 34°0
57 °
Byrne, Sunday, 25 October
Clear. High 57°, low 34°.
Pressure30.33 inHg
Wind2.7 mph N
Humidity52%
Visibility—
Dew point33°
Mon, 2648° / 26°0
48 °
Byrne, Monday, 26 October
Clear. High 48°, low 26°.
Pressure30.42 inHg
Wind4.3 mph E
Humidity42%
Visibility—
Dew point19°
Tue, 2748° / 23°0
48 °
Byrne, Tuesday, 27 October
Clear. High 48°, low 23°.
Pressure30.53 inHg
Wind4.3 mph E
Humidity31%
Visibility—
Dew point10°
Wed, 2854° / 28°0
54 °
Byrne, Wednesday, 28 October
Mostly clear. High 54°, low 28°.
Pressure30.24 inHg
Wind3 mph SE
Humidity22%
Visibility—
Dew point8°
Thu, 2955° / 30°0
55 °
Byrne, Thursday, 29 October
Clear. High 55°, low 30°.
Pressure29.97 inHg
Wind2.6 mph S
Humidity24%
Visibility—
Dew point11°
Fri, 3056° / 31°0
56 °
Byrne, Friday, 30 October
Mostly clear. High 56°, low 31°.
Pressure29.88 inHg
Wind2.5 mph SE
Humidity26%
Visibility—
Dew point14°
Sat, 3155° / 35°0
55 °
Byrne, Saturday, 31 October
Overcast. High 55°, low 35°.
Pressure29.80 inHg
Wind2.8 mph SE
Humidity38%
Visibility—
Dew point23°
Sun, 0153° / 38°0.04
53 °
Byrne, Sunday, 1 November
Light rain. High 53°, low 38°.
Pressure30.00 inHg
Wind9.4 mph W
Humidity62%
Visibility—
Dew point37°
Mon, 0256° / 35°0
56 °
Byrne, Monday, 2 November
Partly cloudy. High 56°, low 35°.
Pressure30.33 inHg
Wind4.2 mph NW
Humidity47%
Visibility—
Dew point29°
Tue, 0360° / 39°0
60 °
Byrne, Tuesday, 3 November
Overcast. High 60°, low 39°.
Pressure30.09 inHg
Wind2.7 mph S
Humidity49%
Visibility—
Dew point33°
Wed, 0455° / 41°0
55 °
Byrne, Wednesday, 4 November
Overcast. High 55°, low 41°.
Pressure29.65 inHg
Wind3.4 mph S
Humidity46%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0540° / 24°0.07
40 °
Byrne, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.07 in
Chance of precipitation33%
Record high58° (1980)
Record low-9° (1961)
Fri, 0639° / 23°0.07
39 °
Byrne, Friday, 6 November
Climate normal for this date — 60-year average.
Average high39°
Average low23°
Average precipitation0.07 in
Chance of precipitation47%
Record high57° (2012)
Record low4° (1961)
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)
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.