Monthly outlook for Hays, MT: average high 48.3°, average low 35.5°. That is 3.8° below the climate normal for October. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 17 October (61.4°), the coolest 13 October (27.1°).
48.3°/35.5°
Average high / low
−3.8°
Below normal
3 / 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
46.6°
55.9°
-5.2°
20 October – 29 October
51.1°
52.5°
-0.8°
30 October – 8 November
at normal
46.4°
—
October records over 66 years
87.1°1 October 2011All-time high
-6.3°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Lodge Pole (5 mi).
Sun, 1138° / 32°0.59
38 °
Hays, Sunday, 11 October
Snow. High 38°, low 32°.
Pressure30.15 inHg
Wind12 mph NE
Humidity99%
Visibility0.9 mi
Dew point33°
Mon, 1232° / 29°0.57
32 °
Hays, Monday, 12 October
Snow. High 32°, low 29°.
Pressure30.18 inHg
Wind4.8 mph N
Humidity100%
Visibility1.5 mi
Dew point31°
Tue, 1339° / 27°0
39 °
Hays, Tuesday, 13 October
Mostly clear. High 39°, low 27°.
Pressure30.12 inHg
Wind4.1 mph SW
Humidity81%
Visibility6.2 mi
Dew point31°
Wed, 1449° / 34°0
49 °
Hays, Wednesday, 14 October
Clear. High 49°, low 34°.
Pressure30.24 inHg
Wind10.4 mph S
Humidity59%
Visibility—
Dew point30°
Thu, 1547° / 36°0
47 °
Hays, Thursday, 15 October
Partly cloudy. High 47°, low 36°.
Pressure30.33 inHg
Wind22 mph N
Humidity64%
Visibility—
Dew point35°
Fri, 1638° / 27°0
38 °
Hays, Friday, 16 October
Partly cloudy. High 38°, low 27°.
Pressure30.71 inHg
Wind20.1 mph NW
Humidity52%
Visibility—
Dew point18°
Sat, 1761° / 28°0
61 °
Hays, Saturday, 17 October
Clear. High 61°, low 28°.
Pressure29.94 inHg
Wind18.8 mph W
Humidity28%
Visibility—
Dew point17°
Sun, 1856° / 39°0
56 °
Hays, Sunday, 18 October
Clear. High 56°, low 39°.
Pressure30.00 inHg
Wind8 mph SE
Humidity35%
Visibility—
Dew point24°
Mon, 1952° / 44°0.03
52 °
Hays, Monday, 19 October
Light rain. High 52°, low 44°.
Pressure29.77 inHg
Wind11.4 mph W
Humidity44%
Visibility—
Dew point28°
Tue, 2048° / 38°0.02
48 °
Hays, Tuesday, 20 October
Light rain. High 48°, low 38°.
Pressure29.71 inHg
Wind11.9 mph W
Humidity45%
Visibility—
Dew point26°
Wed, 2149° / 38°0
49 °
Hays, Wednesday, 21 October
Overcast. High 49°, low 38°.
Pressure30.06 inHg
Wind9.6 mph W
Humidity54%
Visibility—
Dew point29°
Thu, 2251° / 41°0
51 °
Hays, Thursday, 22 October
Overcast. High 51°, low 41°.
Pressure29.80 inHg
Wind21.4 mph W
Humidity35%
Visibility—
Dew point22°
Fri, 2348° / 36°0
48 °
Hays, Friday, 23 October
Partly cloudy. High 48°, low 36°.
Pressure30.21 inHg
Wind16 mph NW
Humidity48%
Visibility—
Dew point26°
Sat, 2451° / 35°0
51 °
Hays, Saturday, 24 October
Overcast. High 51°, low 35°.
Pressure30.09 inHg
Wind11.2 mph W
Humidity32%
Visibility—
Dew point17°
Sun, 2559° / 47°0
59 °
Hays, Sunday, 25 October
Partly cloudy. High 59°, low 47°.
Pressure30.24 inHg
Wind21.3 mph NW
Humidity40%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2651° / 35°0.04
51 °
Hays, Monday, 26 October
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.04 in
Chance of precipitation28%
Record high74° (1960)
Record low7° (2020)
Tue, 2750° / 33°0.02
50 °
Hays, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.02 in
Chance of precipitation18%
Record high71° (2024)
Record low7° (2023)
Wed, 2850° / 33°0.03
50 °
Hays, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.03 in
Chance of precipitation23%
Record high73° (1968)
Record low6° (1984)
Thu, 2949° / 32°0.03
49 °
Hays, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.03 in
Chance of precipitation20%
Record high75° (1968)
Record low0° (1991)
Fri, 3048° / 30°0.03
48 °
Hays, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.03 in
Chance of precipitation20%
Record high67° (1990)
Record low-6° (1991)
Sat, 3147° / 31°0.04
47 °
Hays, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.04 in
Chance of precipitation20%
Record high69° (1987)
Record low-2° (1984)
Sun, 0147° / 31°0.02
47 °
Hays, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.02 in
Chance of precipitation15%
Record high69° (1965)
Record low-9° (1984)
Mon, 0247° / 31°0.02
47 °
Hays, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.02 in
Chance of precipitation10%
Record high67° (1965)
Record low-9° (1991)
Tue, 0347° / 31°0.03
47 °
Hays, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.03 in
Chance of precipitation17%
Record high67° (1981)
Record low-11° (1991)
Wed, 0448° / 32°0.02
48 °
Hays, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low32°
Average precipitation0.02 in
Chance of precipitation15%
Record high69° (1975)
Record low4° (2017)
Thu, 0547° / 30°0.04
47 °
Hays, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.04 in
Chance of precipitation18%
Record high69° (2010)
Record low-9° (2003)
Fri, 0645° / 29°0.03
45 °
Hays, Friday, 6 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high69° (2010)
Record low4° (2017)
Sat, 0744° / 30°0.02
44 °
Hays, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.02 in
Chance of precipitation15%
Record high69° (2010)
Record low1° (1991)
Sun, 0844° / 28°0.06
44 °
Hays, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.06 in
Chance of precipitation25%
Record high67° (1999)
Record low6° (2003)
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 Hays, 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 Hays, 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.