Monthly outlook for Blacktail, MT: average high 45.1°, average low 30.7°. That is 1.9° below the climate normal for October. Precipitation is expected on 8 days (about 1.5 inches), against a normal of 7 days and 1.8 inches. The warmest day looks like 16 October (57.6°), the coolest 12 October (25.8°).
45.1°/30.7°
Average high / low
−1.9°
Below normal
8 / 7
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
46.9°
49.8°
-1.6°
21 October – 30 October
42.1°
44.9°
-1.5°
31 October – 9 November
at normal
39.4°
—
October records over 66 years
81.1°1 October 1992All-time high
-8°25 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Nimrod (6 mi).
Mon, 1239° / 26°0.09
39 °
Blacktail, Monday, 12 October
Snow. High 39°, low 26°.
Pressure30.09 inHg
Wind2.3 mph SW
Humidity90%
Visibility6.2 mi
Dew point23°
Tue, 1343° / 27°0
43 °
Blacktail, Tuesday, 13 October
Clear. High 43°, low 27°.
Pressure30.21 inHg
Wind3.1 mph W
Humidity86%
Visibility1.0 mi
Dew point29°
Wed, 1446° / 26°0
46 °
Blacktail, Wednesday, 14 October
Partly cloudy. High 46°, low 26°.
Pressure30.21 inHg
Wind5 mph W
Humidity74%
Visibility6.2 mi
Dew point31°
Thu, 1552° / 26°0
52 °
Blacktail, Thursday, 15 October
Clear. High 52°, low 26°.
Pressure30.56 inHg
Wind1.4 mph S
Humidity59%
Visibility6.2 mi
Dew point27°
Fri, 1658° / 29°0
58 °
Blacktail, Friday, 16 October
Mostly clear. High 58°, low 29°.
Pressure30.30 inHg
Wind7.8 mph SW
Humidity49%
Visibility—
Dew point30°
Sat, 1757° / 34°0
57 °
Blacktail, Saturday, 17 October
Mostly clear. High 57°, low 34°.
Pressure29.88 inHg
Wind16.1 mph W
Humidity46%
Visibility—
Dew point31°
Sun, 1853° / 39°0.17
53 °
Blacktail, Sunday, 18 October
Light rain. High 53°, low 39°.
Pressure29.94 inHg
Wind11.7 mph W
Humidity62%
Visibility—
Dew point36°
Mon, 1952° / 38°0.09
52 °
Blacktail, Monday, 19 October
Light rain. High 52°, low 38°.
Pressure29.74 inHg
Wind8.1 mph W
Humidity52%
Visibility—
Dew point33°
Tue, 2039° / 35°0.17
39 °
Blacktail, Tuesday, 20 October
Light snow. High 39°, low 35°.
Pressure29.80 inHg
Wind5.7 mph SW
Humidity95%
Visibility—
Dew point37°
Wed, 2135° / 32°0.2
35 °
Blacktail, Wednesday, 21 October
Light snow. High 35°, low 32°.
Pressure30.12 inHg
Wind7.7 mph W
Humidity92%
Visibility—
Dew point33°
Thu, 2242° / 30°0.04
42 °
Blacktail, Thursday, 22 October
Light snow. High 42°, low 30°.
Pressure30.27 inHg
Wind7.7 mph SW
Humidity90%
Visibility—
Dew point35°
Fri, 2349° / 30°0
49 °
Blacktail, Friday, 23 October
Overcast. High 49°, low 30°.
Pressure29.83 inHg
Wind7 mph W
Humidity76%
Visibility—
Dew point37°
Sat, 2439° / 35°0.28
39 °
Blacktail, Saturday, 24 October
Snow. High 39°, low 35°.
Pressure29.88 inHg
Wind4.8 mph SW
Humidity99%
Visibility—
Dew point37°
Sun, 2540° / 28°0
40 °
Blacktail, Sunday, 25 October
Light snow. High 40°, low 28°.
Pressure30.06 inHg
Wind4.8 mph W
Humidity84%
Visibility—
Dew point32°
Mon, 2647° / 27°0
47 °
Blacktail, Monday, 26 October
Overcast. High 47°, low 27°.
Pressure30.18 inHg
Wind2.5 mph SW
Humidity68%
Visibility—
Dew point31°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2743° / 30°0.12
43 °
Blacktail, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.12 in
Chance of precipitation45%
Record high61° (1998)
Record low2° (2023)
Wed, 2843° / 29°0.11
43 °
Blacktail, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high43°
Average low29°
Average precipitation0.11 in
Chance of precipitation42%
Record high59° (1974)
Record low-2° (1971)
Thu, 2941° / 29°0.14
41 °
Blacktail, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high41°
Average low29°
Average precipitation0.14 in
Chance of precipitation47%
Record high61° (1962)
Record low-5° (2019)
Fri, 3041° / 28°0.09
41 °
Blacktail, Friday, 30 October
Climate normal for this date — 60-year average.
Average high41°
Average low28°
Average precipitation0.09 in
Chance of precipitation38%
Record high61° (1983)
Record low-2° (1991)
Sat, 3141° / 28°0.17
41 °
Blacktail, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high41°
Average low28°
Average precipitation0.17 in
Chance of precipitation53%
Record high65° (2008)
Record low1° (2003)
Sun, 0141° / 28°0.15
41 °
Blacktail, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high41°
Average low28°
Average precipitation0.15 in
Chance of precipitation48%
Record high59° (2008)
Record low2° (2006)
Mon, 0240° / 27°0.15
40 °
Blacktail, Monday, 2 November
Climate normal for this date — 60-year average.
Average high40°
Average low27°
Average precipitation0.15 in
Chance of precipitation48%
Record high58° (1981)
Record low-7° (1991)
Tue, 0340° / 29°0.1
40 °
Blacktail, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high40°
Average low29°
Average precipitation0.1 in
Chance of precipitation45%
Record high57° (1981)
Record low6° (1973)
Wed, 0440° / 29°0.19
40 °
Blacktail, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high40°
Average low29°
Average precipitation0.19 in
Chance of precipitation58%
Record high53° (1964)
Record low5° (1967)
Thu, 0540° / 28°0.15
40 °
Blacktail, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.15 in
Chance of precipitation58%
Record high59° (1980)
Record low1° (1993)
Fri, 0639° / 26°0.16
39 °
Blacktail, Friday, 6 November
Climate normal for this date — 60-year average.
Average high39°
Average low26°
Average precipitation0.16 in
Chance of precipitation55%
Record high59° (2010)
Record low5° (2017)
Sat, 0738° / 26°0.17
38 °
Blacktail, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high38°
Average low26°
Average precipitation0.17 in
Chance of precipitation53%
Record high56° (1999)
Record low0° (2022)
Sun, 0838° / 26°0.13
38 °
Blacktail, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high38°
Average low26°
Average precipitation0.13 in
Chance of precipitation48%
Record high56° (2016)
Record low-3° (2022)
Mon, 0937° / 24°0.14
37 °
Blacktail, Monday, 9 November
Climate normal for this date — 60-year average.
Average high37°
Average low24°
Average precipitation0.14 in
Chance of precipitation52%
Record high57° (2016)
Record low-2° (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 Blacktail, 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 Blacktail, 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.