Monthly outlook for Forest Green, MT: average high 45.5°, average low 28.2°. That is 0.5° above the climate normal for October. Precipitation is expected on 3 days (about 1.7 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 21 October (58°), the coolest 25 October (14.2°).
45.5°/28.2°
Average high / low
+0.5°
Above normal
3 / 4
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
49.6°
46.7°
+1.6°
26 October – 4 November
38.7°
40.5°
-1°
5 November – 14 November
at normal
36.4°
—
October records over 66 years
76.6°1 October 2011All-time high
-18.2°10 October 2009All-time low
Sat, 1757° / 36°0
57 °
Forest Green, Saturday, 17 October
Overcast. High 57°, low 36°.
Pressure30.06 inHg
Wind7.5 mph SW
Humidity44%
Visibility6.2 mi
Dew point24°
Sun, 1852° / 37°0
52 °
Forest Green, Sunday, 18 October
Clear. High 52°, low 37°.
Pressure30.12 inHg
Wind4.7 mph S
Humidity57%
Visibility6.2 mi
Dew point31°
Mon, 1957° / 36°0
57 °
Forest Green, Monday, 19 October
Mostly clear. High 57°, low 36°.
Pressure29.91 inHg
Wind7.3 mph S
Humidity44%
Visibility6.2 mi
Dew point29°
Tue, 2056° / 39°0.01
56 °
Forest Green, Tuesday, 20 October
Light rain. High 56°, low 39°.
Pressure29.97 inHg
Wind2.2 mph NW
Humidity44%
Visibility6.2 mi
Dew point32°
Wed, 2158° / 37°0
58 °
Forest Green, Wednesday, 21 October
Clear. High 58°, low 37°.
Pressure30.06 inHg
Wind8.4 mph SW
Humidity54%
Visibility—
Dew point37°
Thu, 2255° / 42°0
55 °
Forest Green, Thursday, 22 October
Partly cloudy. High 55°, low 42°.
Pressure29.77 inHg
Wind5.6 mph NE
Humidity54%
Visibility—
Dew point35°
Fri, 2342° / 28°0.77
42 °
Forest Green, Friday, 23 October
Snow. High 42°, low 28°.
Pressure30.00 inHg
Wind12.7 mph NW
Humidity91%
Visibility—
Dew point28°
Sat, 2430° / 15°0.04
30 °
Forest Green, Saturday, 24 October
Light snow. High 30°, low 15°.
Pressure30.45 inHg
Wind8.5 mph NW
Humidity67%
Visibility—
Dew point18°
Sun, 2534° / 14°0
34 °
Forest Green, Sunday, 25 October
Clear. High 34°, low 14°.
Pressure30.36 inHg
Wind4.5 mph SW
Humidity56%
Visibility—
Dew point15°
Mon, 2644° / 20°0
44 °
Forest Green, Monday, 26 October
Clear. High 44°, low 20°.
Pressure30.09 inHg
Wind5 mph E
Humidity59%
Visibility—
Dew point24°
Tue, 2747° / 28°0
47 °
Forest Green, Tuesday, 27 October
Overcast. High 47°, low 28°.
Pressure29.65 inHg
Wind6.7 mph E
Humidity56%
Visibility—
Dew point27°
Wed, 2831° / 29°0.81
31 °
Forest Green, Wednesday, 28 October
Snow. High 31°, low 29°.
Pressure29.65 inHg
Wind16.1 mph W
Humidity99%
Visibility—
Dew point31°
Thu, 2934° / 24°0.07
34 °
Forest Green, Thursday, 29 October
Light snow. High 34°, low 24°.
Pressure30.09 inHg
Wind12.3 mph W
Humidity92%
Visibility—
Dew point30°
Fri, 3038° / 19°0
38 °
Forest Green, Friday, 30 October
Clear. High 38°, low 19°.
Pressure30.00 inHg
Wind10.7 mph W
Humidity81%
Visibility—
Dew point28°
Sat, 3138° / 28°0.03
38 °
Forest Green, Saturday, 31 October
Light snow. High 38°, low 28°.
Pressure29.77 inHg
Wind14.9 mph W
Humidity81%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0139° / 25°0.05
39 °
Forest Green, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high39°
Average low25°
Average precipitation0.05 in
Chance of precipitation28%
Record high59° (2014)
Record low-5° (1991)
Mon, 0239° / 24°0.04
39 °
Forest Green, Monday, 2 November
Climate normal for this date — 60-year average.
Average high39°
Average low24°
Average precipitation0.04 in
Chance of precipitation25%
Record high57° (1981)
Record low-14° (1991)
Tue, 0339° / 25°0.05
39 °
Forest Green, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high39°
Average low25°
Average precipitation0.05 in
Chance of precipitation27%
Record high58° (1962)
Record low-4° (1991)
Wed, 0440° / 25°0.07
40 °
Forest Green, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high40°
Average low25°
Average precipitation0.07 in
Chance of precipitation35%
Record high55° (2016)
Record low-3° (2003)
Thu, 0539° / 25°0.07
39 °
Forest Green, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high39°
Average low25°
Average precipitation0.07 in
Chance of precipitation35%
Record high56° (1975)
Record low-7° (2003)
Fri, 0638° / 23°0.04
38 °
Forest Green, Friday, 6 November
Climate normal for this date — 60-year average.
Average high38°
Average low23°
Average precipitation0.04 in
Chance of precipitation28%
Record high57° (2010)
Record low-3° (2003)
Sat, 0738° / 23°0.05
38 °
Forest Green, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high38°
Average low23°
Average precipitation0.05 in
Chance of precipitation32%
Record high58° (1999)
Record low-3° (2017)
Sun, 0837° / 22°0.07
37 °
Forest Green, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high37°
Average low22°
Average precipitation0.07 in
Chance of precipitation43%
Record high56° (2016)
Record low-9° (2018)
Mon, 0936° / 21°0.05
36 °
Forest Green, Monday, 9 November
Climate normal for this date — 60-year average.
Average high36°
Average low21°
Average precipitation0.05 in
Chance of precipitation25%
Record high57° (2016)
Record low-11° (1986)
Tue, 1035° / 20°0.04
35 °
Forest Green, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high35°
Average low20°
Average precipitation0.04 in
Chance of precipitation23%
Record high53° (2016)
Record low-21° (1986)
Wed, 1134° / 19°0.03
34 °
Forest Green, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high34°
Average low19°
Average precipitation0.03 in
Chance of precipitation22%
Record high56° (2016)
Record low-11° (2019)
Thu, 1236° / 20°0.04
36 °
Forest Green, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high36°
Average low20°
Average precipitation0.04 in
Chance of precipitation27%
Record high57° (1999)
Record low-22° (1986)
Fri, 1336° / 21°0.05
36 °
Forest Green, Friday, 13 November
Climate normal for this date — 60-year average.
Average high36°
Average low21°
Average precipitation0.05 in
Chance of precipitation25%
Record high55° (1999)
Record low-1° (2000)
Sat, 1435° / 20°0.05
35 °
Forest Green, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high35°
Average low20°
Average precipitation0.05 in
Chance of precipitation33%
Record high56° (1999)
Record low-4° (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 Forest Green, 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 Forest Green, 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.