Monthly outlook for Greenfield, MT: average high 48.3°, average low 32.8°. That is 3.8° 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 17 October (61.6°), the coolest 14 October (23°).
48.3°/32.8°
Average high / low
−3.8°
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
45.7°
55.9°
-5.7°
20 October – 29 October
52.7°
52.4°
+0.2°
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, 1134° / 27°0.87
34 °
Greenfield, Sunday, 11 October
Snow. High 34°, low 27°.
Pressure30.15 inHg
Wind13.2 mph NE
Humidity99%
Visibility2.4 mi
Dew point31°
Mon, 1232° / 24°0.28
32 °
Greenfield, Monday, 12 October
Snow. High 32°, low 24°.
Pressure30.21 inHg
Wind4.7 mph N
Humidity98%
Visibility6.2 mi
Dew point29°
Tue, 1335° / 24°0
35 °
Greenfield, Tuesday, 13 October
Mostly clear. High 35°, low 24°.
Pressure30.12 inHg
Wind7.6 mph SW
Humidity93%
Visibility0.3 mi
Dew point29°
Wed, 1439° / 23°0
39 °
Greenfield, Wednesday, 14 October
Clear. High 39°, low 23°.
Pressure30.21 inHg
Wind9.2 mph SW
Humidity84%
Visibility—
Dew point30°
Thu, 1543° / 30°0
43 °
Greenfield, Thursday, 15 October
Partly cloudy. High 43°, low 30°.
Pressure30.39 inHg
Wind11.4 mph W
Humidity67%
Visibility—
Dew point31°
Fri, 1644° / 30°0
44 °
Greenfield, Friday, 16 October
Overcast. High 44°, low 30°.
Pressure30.65 inHg
Wind8.3 mph SE
Humidity60%
Visibility—
Dew point25°
Sat, 1762° / 36°0
62 °
Greenfield, Saturday, 17 October
Overcast. High 62°, low 36°.
Pressure29.97 inHg
Wind15 mph SW
Humidity42%
Visibility—
Dew point28°
Sun, 1855° / 41°0
55 °
Greenfield, Sunday, 18 October
Overcast. High 55°, low 41°.
Pressure29.97 inHg
Wind6.6 mph W
Humidity46%
Visibility—
Dew point29°
Mon, 1956° / 43°0
56 °
Greenfield, Monday, 19 October
Overcast. High 56°, low 43°.
Pressure29.80 inHg
Wind11.5 mph W
Humidity48%
Visibility—
Dew point33°
Tue, 2052° / 37°0
52 °
Greenfield, Tuesday, 20 October
Overcast. High 52°, low 37°.
Pressure29.71 inHg
Wind15 mph W
Humidity48%
Visibility—
Dew point29°
Wed, 2152° / 35°0
52 °
Greenfield, Wednesday, 21 October
Mostly clear. High 52°, low 35°.
Pressure30.03 inHg
Wind15.2 mph SW
Humidity44%
Visibility—
Dew point24°
Thu, 2251° / 39°0
51 °
Greenfield, Thursday, 22 October
Partly cloudy. High 51°, low 39°.
Pressure29.85 inHg
Wind20 mph W
Humidity34%
Visibility—
Dew point21°
Fri, 2350° / 32°0
50 °
Greenfield, Friday, 23 October
Clear. High 50°, low 32°.
Pressure30.27 inHg
Wind12.4 mph W
Humidity39%
Visibility—
Dew point20°
Sat, 2455° / 33°0
55 °
Greenfield, Saturday, 24 October
Overcast. High 55°, low 33°.
Pressure30.15 inHg
Wind17.2 mph SW
Humidity37%
Visibility—
Dew point20°
Sun, 2557° / 39°0
57 °
Greenfield, Sunday, 25 October
Partly cloudy. High 57°, low 39°.
Pressure30.36 inHg
Wind10.6 mph SW
Humidity35%
Visibility—
Dew point27°
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.