Monthly outlook for Greenfield, MT: average high 50.6°, average low 35.9°. That is 2.6° below the climate normal for October. Precipitation is expected on 3 days (about 1.7 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 18 October (62.9°), the coolest 14 October (23.5°).
50.6°/35.9°
Average high / low
−2.6°
Below normal
3 / 3
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
46.8°
55.9°
-5.1°
20 October – 29 October
56.9°
52.4°
+2.5°
30 October – 8 November
at normal
46°
—
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).
Sun, 1133° / 29°0.73
33 °
Greenfield, Sunday, 11 October
Snow. High 33°, low 29°.
Pressure30.12 inHg
Wind12.7 mph N
Humidity99%
Visibility2.2 mi
Dew point31°
Mon, 1233° / 25°0.24
33 °
Greenfield, Monday, 12 October
Snow. High 33°, low 25°.
Pressure30.21 inHg
Wind2.3 mph N
Humidity98%
Visibility6.2 mi
Dew point29°
Tue, 1337° / 24°0
37 °
Greenfield, Tuesday, 13 October
Mostly clear. High 37°, low 24°.
Pressure30.09 inHg
Wind5.8 mph SW
Humidity94%
Visibility1.5 mi
Dew point30°
Wed, 1441° / 24°0
41 °
Greenfield, Wednesday, 14 October
Clear. High 41°, low 24°.
Pressure30.15 inHg
Wind7.9 mph SW
Humidity80%
Visibility—
Dew point29°
Thu, 1548° / 27°0
48 °
Greenfield, Thursday, 15 October
Clear. High 48°, low 27°.
Pressure30.47 inHg
Wind9.1 mph NW
Humidity73%
Visibility—
Dew point34°
Fri, 1644° / 31°0
44 °
Greenfield, Friday, 16 October
Mostly clear. High 44°, low 31°.
Pressure30.71 inHg
Wind8.9 mph SE
Humidity63%
Visibility—
Dew point27°
Sat, 1759° / 34°0
59 °
Greenfield, Saturday, 17 October
Partly cloudy. High 59°, low 34°.
Pressure29.97 inHg
Wind17.6 mph SW
Humidity40%
Visibility—
Dew point27°
Sun, 1863° / 47°0
63 °
Greenfield, Sunday, 18 October
Overcast. High 63°, low 47°.
Pressure29.91 inHg
Wind16.1 mph SW
Humidity42%
Visibility—
Dew point34°
Mon, 1957° / 45°0
57 °
Greenfield, Monday, 19 October
Overcast. High 57°, low 45°.
Pressure29.88 inHg
Wind12.2 mph SW
Humidity51%
Visibility—
Dew point34°
Tue, 2049° / 40°0.01
49 °
Greenfield, Tuesday, 20 October
Light rain. High 49°, low 40°.
Pressure30.18 inHg
Wind16 mph NW
Humidity76%
Visibility—
Dew point36°
Wed, 2155° / 42°0
55 °
Greenfield, Wednesday, 21 October
Overcast. High 55°, low 42°.
Pressure29.91 inHg
Wind25.6 mph W
Humidity40%
Visibility—
Dew point27°
Thu, 2257° / 38°0
57 °
Greenfield, Thursday, 22 October
Overcast. High 57°, low 38°.
Pressure30.03 inHg
Wind8.5 mph S
Humidity33%
Visibility—
Dew point19°
Fri, 2360° / 44°0
60 °
Greenfield, Friday, 23 October
Overcast. High 60°, low 44°.
Pressure29.83 inHg
Wind14.3 mph SW
Humidity40%
Visibility—
Dew point27°
Sat, 2461° / 48°0
61 °
Greenfield, Saturday, 24 October
Overcast. High 61°, low 48°.
Pressure30.03 inHg
Wind14.5 mph W
Humidity42%
Visibility—
Dew point35°
Sun, 2559° / 41°0
59 °
Greenfield, Sunday, 25 October
Mostly clear. High 59°, low 41°.
Pressure30.27 inHg
Wind7.1 mph E
Humidity57%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2651° / 32°0.04
51 °
Greenfield, Monday, 26 October
Climate normal for this date — 60-year average.
Average high51°
Average low32°
Average precipitation0.04 in
Chance of precipitation20%
Record high68° (2005)
Record low6° (2020)
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)
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.