Monthly outlook for Williams, MT: average high 49.2°, average low 35.2°. That is 2.5° below the climate normal for October. Precipitation is expected on 4 days (about 1.4 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 17 October (61.9°), the coolest 13 October (18.1°).
49.2°/35.2°
Average high / low
−2.5°
Below normal
4 / 3
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
46.9°
54.5°
-4.2°
20 October – 29 October
53°
50.8°
+1.2°
30 October – 8 November
at normal
44.6°
—
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).
Sun, 1132° / 29°0.63
32 °
Williams, Sunday, 11 October
Snow. High 32°, low 29°.
Pressure30.18 inHg
Wind11.9 mph N
Humidity98%
Visibility2.1 mi
Dew point31°
Mon, 1232° / 23°0.2
32 °
Williams, Monday, 12 October
Snow. High 32°, low 23°.
Pressure30.21 inHg
Wind3.1 mph S
Humidity98%
Visibility6.2 mi
Dew point30°
Tue, 1337° / 18°0
37 °
Williams, Tuesday, 13 October
Partly cloudy. High 37°, low 18°.
Pressure30.09 inHg
Wind6.8 mph W
Humidity93%
Visibility5.7 mi
Dew point30°
Wed, 1439° / 28°0
39 °
Williams, Wednesday, 14 October
Clear. High 39°, low 28°.
Pressure30.15 inHg
Wind3.3 mph SE
Humidity75%
Visibility6.2 mi
Dew point27°
Thu, 1555° / 36°0
55 °
Williams, Thursday, 15 October
Clear. High 55°, low 36°.
Pressure30.45 inHg
Wind7.7 mph W
Humidity62%
Visibility—
Dew point34°
Fri, 1644° / 31°0
44 °
Williams, Friday, 16 October
Mostly clear. High 44°, low 31°.
Pressure30.71 inHg
Wind13.8 mph SE
Humidity57%
Visibility—
Dew point24°
Sat, 1762° / 33°0
62 °
Williams, Saturday, 17 October
Overcast. High 62°, low 33°.
Pressure29.91 inHg
Wind14.8 mph W
Humidity38%
Visibility—
Dew point29°
Sun, 1861° / 48°0
61 °
Williams, Sunday, 18 October
Overcast. High 61°, low 48°.
Pressure29.88 inHg
Wind19.5 mph W
Humidity41%
Visibility—
Dew point33°
Mon, 1956° / 44°0
56 °
Williams, Monday, 19 October
Overcast. High 56°, low 44°.
Pressure29.85 inHg
Wind20.7 mph W
Humidity44%
Visibility—
Dew point31°
Tue, 2049° / 36°0.13
49 °
Williams, Tuesday, 20 October
Light rain. High 49°, low 36°.
Pressure30.15 inHg
Wind18.4 mph NW
Humidity57%
Visibility—
Dew point29°
Wed, 2150° / 39°0
50 °
Williams, Wednesday, 21 October
Overcast. High 50°, low 39°.
Pressure29.80 inHg
Wind41 mph W
Humidity45%
Visibility—
Dew point27°
Thu, 2251° / 37°0
51 °
Williams, Thursday, 22 October
Overcast. High 51°, low 37°.
Pressure30.03 inHg
Wind19.7 mph W
Humidity34%
Visibility—
Dew point18°
Fri, 2355° / 40°0
55 °
Williams, Friday, 23 October
Overcast. High 55°, low 40°.
Pressure29.83 inHg
Wind21.3 mph W
Humidity40%
Visibility—
Dew point25°
Sat, 2457° / 48°0
57 °
Williams, Saturday, 24 October
Overcast. High 57°, low 48°.
Pressure30.06 inHg
Wind17 mph W
Humidity47%
Visibility—
Dew point35°
Sun, 2556° / 39°0
56 °
Williams, Sunday, 25 October
Mostly clear. High 56°, low 39°.
Pressure30.30 inHg
Wind8.5 mph SE
Humidity54%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sat, 0742° / 27°0.03
42 °
Williams, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high42°
Average low27°
Average precipitation0.03 in
Chance of precipitation20%
Record high64° (2010)
Record low-9° (1973)
Sun, 0842° / 26°0.04
42 °
Williams, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.04 in
Chance of precipitation20%
Record high64° (2004)
Record low-7° (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 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.