Monthly outlook for Piper, MT: average high 51.1°, average low 33.4°. That is 2.2° below the climate normal for October. Precipitation is expected on 6 days (about 1.8 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 18 October (68.1°), the coolest 13 October (20.5°).
51.1°/33.4°
Average high / low
−2.2°
Below normal
6 / 4
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
49.3°
55.5°
-3.5°
20 October – 29 October
54.2°
52.8°
+0.8°
30 October – 8 November
at normal
46.7°
—
October records over 66 years
87.4°1 October 2011All-time high
-16.4°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Lewistown (13 mi).
Sun, 1135° / 29°0.64
35 °
Piper, Sunday, 11 October
Snow. High 35°, low 29°.
Pressure30.06 inHg
Wind7.6 mph NE
Humidity95%
Visibility1.5 mi
Dew point33°
Mon, 1231° / 22°0.36
31 °
Piper, Monday, 12 October
Snow. High 31°, low 22°.
Pressure30.15 inHg
Wind6.6 mph W
Humidity97%
Visibility6.2 mi
Dew point28°
Tue, 1342° / 20°0
42 °
Piper, Tuesday, 13 October
Clear. High 42°, low 20°.
Pressure30.03 inHg
Wind2.9 mph W
Humidity63%
Visibility6.2 mi
Dew point28°
Wed, 1448° / 23°0
48 °
Piper, Wednesday, 14 October
Clear. High 48°, low 23°.
Pressure30.15 inHg
Wind3.2 mph E
Humidity59%
Visibility—
Dew point27°
Thu, 1555° / 35°0
55 °
Piper, Thursday, 15 October
Clear. High 55°, low 35°.
Pressure30.30 inHg
Wind13.5 mph W
Humidity45%
Visibility—
Dew point28°
Fri, 1636° / 25°0.04
36 °
Piper, Friday, 16 October
Light snow. High 36°, low 25°.
Pressure30.77 inHg
Wind25 mph NW
Humidity64%
Visibility—
Dew point19°
Sat, 1763° / 24°0
63 °
Piper, Saturday, 17 October
Clear. High 63°, low 24°.
Pressure30.12 inHg
Wind6 mph SW
Humidity19%
Visibility—
Dew point12°
Sun, 1868° / 46°0
68 °
Piper, Sunday, 18 October
Overcast. High 68°, low 46°.
Pressure29.83 inHg
Wind18.2 mph W
Humidity14%
Visibility—
Dew point14°
Mon, 1958° / 44°0
58 °
Piper, Monday, 19 October
Overcast. High 58°, low 44°.
Pressure29.97 inHg
Wind12 mph W
Humidity31%
Visibility—
Dew point23°
Tue, 2065° / 44°0
65 °
Piper, Tuesday, 20 October
Overcast. High 65°, low 44°.
Pressure29.71 inHg
Wind12.6 mph SW
Humidity21%
Visibility—
Dew point20°
Wed, 2152° / 40°0
52 °
Piper, Wednesday, 21 October
Overcast. High 52°, low 40°.
Pressure29.77 inHg
Wind15.3 mph NW
Humidity37%
Visibility—
Dew point25°
Thu, 2256° / 36°0
56 °
Piper, Thursday, 22 October
Overcast. High 56°, low 36°.
Pressure29.83 inHg
Wind20.6 mph W
Humidity30%
Visibility—
Dew point20°
Fri, 2354° / 37°0.1
54 °
Piper, Friday, 23 October
Light rain. High 54°, low 37°.
Pressure29.65 inHg
Wind30.4 mph W
Humidity61%
Visibility—
Dew point37°
Sat, 2448° / 35°0.13
48 °
Piper, Saturday, 24 October
Snow. High 48°, low 35°.
Pressure30.06 inHg
Wind17.7 mph W
Humidity48%
Visibility—
Dew point24°
Sun, 2551° / 39°0.15
51 °
Piper, Sunday, 25 October
Light rain. High 51°, low 39°.
Pressure29.29 inHg
Wind23.8 mph W
Humidity63%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2652° / 34°0.06
52 °
Piper, Monday, 26 October
Climate normal for this date — 60-year average.
Average high52°
Average low34°
Average precipitation0.06 in
Chance of precipitation32%
Record high71° (1960)
Record low4° (2020)
Tue, 2751° / 32°0.05
51 °
Piper, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high51°
Average low32°
Average precipitation0.05 in
Chance of precipitation28%
Record high70° (2024)
Record low-3° (2023)
Wed, 2850° / 32°0.06
50 °
Piper, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.06 in
Chance of precipitation25%
Record high71° (1990)
Record low1° (2023)
Thu, 2948° / 31°0.04
48 °
Piper, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.04 in
Chance of precipitation22%
Record high72° (1968)
Record low-5° (1991)
Fri, 3048° / 29°0.04
48 °
Piper, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.04 in
Chance of precipitation27%
Record high68° (1987)
Record low-16° (1991)
Sat, 3148° / 30°0.05
48 °
Piper, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.05 in
Chance of precipitation22%
Record high69° (2008)
Record low0° (1984)
Sun, 0147° / 30°0.03
47 °
Piper, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.03 in
Chance of precipitation20%
Record high69° (2025)
Record low-5° (1991)
Mon, 0247° / 29°0.02
47 °
Piper, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.02 in
Chance of precipitation20%
Record high68° (2020)
Record low-16° (1991)
Tue, 0348° / 30°0.05
48 °
Piper, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.05 in
Chance of precipitation22%
Record high68° (1981)
Record low-9° (1991)
Wed, 0448° / 30°0.05
48 °
Piper, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.05 in
Chance of precipitation23%
Record high69° (1976)
Record low-4° (2003)
Thu, 0547° / 30°0.07
47 °
Piper, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.07 in
Chance of precipitation30%
Record high69° (2010)
Record low-15° (2003)
Fri, 0646° / 28°0.03
46 °
Piper, Friday, 6 November
Climate normal for this date — 60-year average.
Average high46°
Average low28°
Average precipitation0.03 in
Chance of precipitation18%
Record high69° (2010)
Record low-3° (2003)
Sat, 0745° / 28°0.02
45 °
Piper, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.02 in
Chance of precipitation25%
Record high70° (1999)
Record low-4° (1973)
Sun, 0844° / 27°0.06
44 °
Piper, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high44°
Average low27°
Average precipitation0.06 in
Chance of precipitation30%
Record high68° (1999)
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 Piper, 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 Piper, 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.