Monthly outlook for Williams, MT: average high 51.3°, average low 34.6°. That is 1.9° below the climate normal for October. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 9 October (74.1°), the coolest 13 October (24.7°).
51.3°/34.6°
Average high / low
−1.9°
Below normal
4 / 3
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
50.6°
55.2°
-2.5°
18 October – 27 October
52.4°
52.3°
+0°
28 October – 6 November
at normal
45.7°
—
October records over 66 years
84.9°1 October 1992All-time high
-10.3°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Valier (6 mi).
Fri, 0974° / 45°0
74 °
Williams, Friday, 9 October
Overcast. High 74°, low 45°.
Pressure29.44 inHg
Wind13.6 mph SW
Humidity22%
Visibility6.2 mi
Dew point27°
Sat, 1052° / 33°0.07
52 °
Williams, Saturday, 10 October
Light snow. High 52°, low 33°.
Pressure29.88 inHg
Wind14.2 mph N
Humidity64%
Visibility6.2 mi
Dew point26°
Sun, 1132° / 30°0.37
32 °
Williams, Sunday, 11 October
Snow. High 32°, low 30°.
Pressure30.24 inHg
Wind11.5 mph N
Humidity98%
Visibility3.3 mi
Dew point29°
Mon, 1233° / 30°0.13
33 °
Williams, Monday, 12 October
Light snow. High 33°, low 30°.
Pressure30.18 inHg
Wind2.8 mph SE
Humidity97%
Visibility6.2 mi
Dew point31°
Tue, 1340° / 25°0
40 °
Williams, Tuesday, 13 October
Overcast. High 40°, low 25°.
Pressure30.15 inHg
Wind6.6 mph S
Humidity92%
Visibility—
Dew point29°
Wed, 1454° / 38°0
54 °
Williams, Wednesday, 14 October
Overcast. High 54°, low 38°.
Pressure29.62 inHg
Wind21.9 mph N
Humidity44%
Visibility—
Dew point31°
Thu, 1537° / 30°0.03
37 °
Williams, Thursday, 15 October
Snow. High 37°, low 30°.
Pressure30.50 inHg
Wind24.2 mph NW
Humidity59%
Visibility—
Dew point21°
Fri, 1652° / 27°0
52 °
Williams, Friday, 16 October
Clear. High 52°, low 27°.
Pressure30.42 inHg
Wind13.7 mph S
Humidity34%
Visibility—
Dew point16°
Sat, 1761° / 33°0
61 °
Williams, Saturday, 17 October
Clear. High 61°, low 33°.
Pressure30.03 inHg
Wind16.1 mph NW
Humidity28%
Visibility—
Dew point16°
Sun, 1857° / 38°0
57 °
Williams, Sunday, 18 October
Mostly clear. High 57°, low 38°.
Pressure30.03 inHg
Wind7.3 mph S
Humidity29%
Visibility—
Dew point19°
Mon, 1958° / 47°0
58 °
Williams, Monday, 19 October
Partly cloudy. High 58°, low 47°.
Pressure29.97 inHg
Wind29.4 mph W
Humidity36%
Visibility—
Dew point29°
Tue, 2063° / 42°0
63 °
Williams, Tuesday, 20 October
Mostly clear. High 63°, low 42°.
Pressure30.15 inHg
Wind18.3 mph W
Humidity37%
Visibility—
Dew point27°
Wed, 2151° / 38°0
51 °
Williams, Wednesday, 21 October
Overcast. High 51°, low 38°.
Pressure30.36 inHg
Wind19.8 mph W
Humidity37%
Visibility—
Dew point20°
Thu, 2249° / 33°0.02
49 °
Williams, Thursday, 22 October
Light rain. High 49°, low 33°.
Pressure29.97 inHg
Wind19.3 mph W
Humidity33%
Visibility—
Dew point15°
Fri, 2336° / 26°0.08
36 °
Williams, Friday, 23 October
Light snow. High 36°, low 26°.
Pressure30.03 inHg
Wind19.4 mph N
Humidity72%
Visibility—
Dew point24°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2451° / 33°0.02
51 °
Williams, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.02 in
Chance of precipitation8%
Record high72° (2007)
Record low2° (2020)
Sun, 2551° / 33°0.01
51 °
Williams, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.01 in
Chance of precipitation7%
Record high70° (1990)
Record low0° (2020)
Mon, 2649° / 32°0.05
49 °
Williams, Monday, 26 October
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.05 in
Chance of precipitation25%
Record high67° (1983)
Record low1° (1969)
Tue, 2749° / 31°0.04
49 °
Williams, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.04 in
Chance of precipitation20%
Record high66° (2001)
Record low7° (1969)
Wed, 2848° / 30°0.03
48 °
Williams, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.03 in
Chance of precipitation15%
Record high71° (2008)
Record low-5° (1991)
Thu, 2947° / 29°0.04
47 °
Williams, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.04 in
Chance of precipitation23%
Record high69° (1968)
Record low-5° (1991)
Fri, 3047° / 28°0.02
47 °
Williams, Friday, 30 October
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.02 in
Chance of precipitation8%
Record high71° (1962)
Record low-10° (1991)
Sat, 3146° / 29°0.04
46 °
Williams, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.04 in
Chance of precipitation15%
Record high67° (2014)
Record low-9° (2002)
Sun, 0145° / 29°0.04
45 °
Williams, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.04 in
Chance of precipitation22%
Record high66° (2008)
Record low-16° (1984)
Mon, 0246° / 29°0.04
46 °
Williams, Monday, 2 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.04 in
Chance of precipitation23%
Record high68° (1981)
Record low-16° (1991)
Tue, 0346° / 29°0.02
46 °
Williams, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.02 in
Chance of precipitation12%
Record high70° (1962)
Record low-4° (1991)
Wed, 0446° / 30°0.04
46 °
Williams, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.04 in
Chance of precipitation25%
Record high65° (2010)
Record low-2° (2003)
Thu, 0544° / 28°0.03
44 °
Williams, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.03 in
Chance of precipitation27%
Record high71° (2010)
Record low-13° (2003)
Fri, 0643° / 27°0.04
43 °
Williams, Friday, 6 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.04 in
Chance of precipitation27%
Record high67° (2010)
Record low-6° (1971)
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 Williams, 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 Williams, 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.