Monthly outlook for Greenfield, MT: average high 49.7°, average low 36.4°. That is 2.8° below the climate normal for October. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 17 October (68.7°), the coolest 13 October (25.5°).
49.7°/36.4°
Average high / low
−2.8°
Below normal
3 / 3
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
52.1°
55.6°
-2°
21 October – 30 October
45.7°
51.5°
-3.2°
31 October – 9 November
at normal
45.4°
—
October records over 66 years
86.2°1 October 1992All-time high
-10.5°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Fairfield (6 mi).
Mon, 1233° / 26°0.13
33 °
Greenfield, Monday, 12 October
Snow. High 33°, low 26°.
Pressure30.18 inHg
Wind1.9 mph N
Humidity97%
Visibility6.2 mi
Dew point29°
Tue, 1343° / 25°0
43 °
Greenfield, Tuesday, 13 October
Mostly clear. High 43°, low 25°.
Pressure30.09 inHg
Wind6.2 mph SW
Humidity86%
Visibility0.4 mi
Dew point31°
Wed, 1454° / 30°0
54 °
Greenfield, Wednesday, 14 October
Partly cloudy. High 54°, low 30°.
Pressure30.12 inHg
Wind7.4 mph SW
Humidity70%
Visibility1.1 mi
Dew point32°
Thu, 1551° / 33°0
51 °
Greenfield, Thursday, 15 October
Clear. High 51°, low 33°.
Pressure30.68 inHg
Wind5.2 mph SE
Humidity56%
Visibility5.4 mi
Dew point30°
Fri, 1667° / 43°0
67 °
Greenfield, Friday, 16 October
Overcast. High 67°, low 43°.
Pressure30.27 inHg
Wind14.9 mph SW
Humidity36%
Visibility—
Dew point31°
Sat, 1769° / 48°0
69 °
Greenfield, Saturday, 17 October
Mostly clear. High 69°, low 48°.
Pressure29.91 inHg
Wind21 mph SW
Humidity37%
Visibility—
Dew point33°
Sun, 1863° / 49°0
63 °
Greenfield, Sunday, 18 October
Overcast. High 63°, low 49°.
Pressure29.88 inHg
Wind14.9 mph SW
Humidity36%
Visibility—
Dew point33°
Mon, 1959° / 44°0
59 °
Greenfield, Monday, 19 October
Overcast. High 59°, low 44°.
Pressure29.88 inHg
Wind6.6 mph E
Humidity48%
Visibility—
Dew point33°
Tue, 2050° / 45°0.05
50 °
Greenfield, Tuesday, 20 October
Light rain. High 50°, low 45°.
Pressure29.65 inHg
Wind25.1 mph W
Humidity43%
Visibility—
Dew point28°
Wed, 2150° / 41°0
50 °
Greenfield, Wednesday, 21 October
Partly cloudy. High 50°, low 41°.
Pressure29.77 inHg
Wind20 mph SW
Humidity39%
Visibility—
Dew point24°
Thu, 2240° / 36°0.01
40 °
Greenfield, Thursday, 22 October
Light rain. High 40°, low 36°.
Pressure30.18 inHg
Wind8.5 mph NW
Humidity80%
Visibility—
Dew point34°
Fri, 2345° / 34°0
45 °
Greenfield, Friday, 23 October
Overcast. High 45°, low 34°.
Pressure30.59 inHg
Wind8.7 mph NW
Humidity61%
Visibility—
Dew point28°
Sat, 2456° / 32°0
56 °
Greenfield, Saturday, 24 October
Clear. High 56°, low 32°.
Pressure30.39 inHg
Wind14.9 mph S
Humidity45%
Visibility—
Dew point25°
Sun, 2548° / 38°0
48 °
Greenfield, Sunday, 25 October
Partly cloudy. High 48°, low 38°.
Pressure30.42 inHg
Wind13.9 mph NE
Humidity41%
Visibility—
Dew point25°
Mon, 2636° / 29°0
36 °
Greenfield, Monday, 26 October
Overcast. High 36°, low 29°.
Pressure30.50 inHg
Wind10.9 mph E
Humidity52%
Visibility—
Dew point18°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2751° / 31°0.03
51 °
Greenfield, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high51°
Average low31°
Average precipitation0.03 in
Chance of precipitation18%
Record high68° (2024)
Record low8° (2023)
Wed, 2850° / 30°0.03
50 °
Greenfield, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high50°
Average low30°
Average precipitation0.03 in
Chance of precipitation17%
Record high71° (2008)
Record low-1° (1991)
Thu, 2948° / 29°0.03
48 °
Greenfield, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.03 in
Chance of precipitation18%
Record high69° (1987)
Record low-2° (1991)
Fri, 3048° / 28°0.02
48 °
Greenfield, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low28°
Average precipitation0.02 in
Chance of precipitation13%
Record high70° (1962)
Record low-10° (1991)
Sat, 3147° / 29°0.03
47 °
Greenfield, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.03 in
Chance of precipitation20%
Record high67° (2014)
Record low-8° (2002)
Sun, 0147° / 29°0.03
47 °
Greenfield, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high69° (2025)
Record low-10° (1984)
Mon, 0247° / 29°0.03
47 °
Greenfield, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.03 in
Chance of precipitation22%
Record high66° (1981)
Record low-7° (1991)
Tue, 0347° / 29°0.02
47 °
Greenfield, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.02 in
Chance of precipitation13%
Record high69° (1962)
Record low-4° (1991)
Wed, 0447° / 29°0.03
47 °
Greenfield, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.03 in
Chance of precipitation18%
Record high66° (2010)
Record low2° (2017)
Thu, 0546° / 28°0.03
46 °
Greenfield, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.03 in
Chance of precipitation22%
Record high68° (2010)
Record low-13° (2003)
Fri, 0644° / 27°0.03
44 °
Greenfield, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low27°
Average precipitation0.03 in
Chance of precipitation20%
Record high66° (2010)
Record low-9° (2003)
Sat, 0744° / 28°0.03
44 °
Greenfield, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.03 in
Chance of precipitation20%
Record high65° (2010)
Record low-4° (1973)
Sun, 0843° / 26°0.04
43 °
Greenfield, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.04 in
Chance of precipitation25%
Record high64° (2004)
Record low-5° (1973)
Mon, 0942° / 25°0.05
42 °
Greenfield, Monday, 9 November
Climate normal for this date — 60-year average.
Average high42°
Average low25°
Average precipitation0.05 in
Chance of precipitation25%
Record high66° (2016)
Record low-2° (1986)
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 Greenfield, 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 Greenfield, 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.