Monthly outlook for Simms, MT: average high 54.8°, average low 35.5°. That is 1° below the climate normal for October. Precipitation is expected on 2 days (about 1.0 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 8 October (77.3°), the coolest 13 October (23.9°).
54.8°/35.5°
Average high / low
−1°
Below normal
2 / 3
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
52.3°
57.1°
-2.7°
17 October – 26 October
58.8°
54.4°
+2.5°
27 October – 5 November
at normal
47.7°
—
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 (9 mi).
Thu, 0877° / 43°0
77 °
Simms, Thursday, 8 October
Partly cloudy. High 77°, low 43°.
Pressure29.91 inHg
Wind7.8 mph SW
Humidity20%
Visibility6.2 mi
Dew point25°
Fri, 0976° / 55°0
76 °
Simms, Friday, 9 October
Overcast. High 76°, low 55°.
Pressure29.44 inHg
Wind18.5 mph SW
Humidity21%
Visibility6.2 mi
Dew point30°
Sat, 1056° / 34°0.64
56 °
Simms, Saturday, 10 October
Snow. High 56°, low 34°.
Pressure29.88 inHg
Wind14 mph N
Humidity96%
Visibility1.1 mi
Dew point35°
Sun, 1132° / 30°0.37
32 °
Simms, Sunday, 11 October
Snow. High 32°, low 30°.
Pressure30.30 inHg
Wind12.1 mph NE
Humidity97%
Visibility2.3 mi
Dew point28°
Mon, 1233° / 26°0.01
33 °
Simms, Monday, 12 October
Light snow. High 33°, low 26°.
Pressure30.33 inHg
Wind8.5 mph NE
Humidity95%
Visibility—
Dew point29°
Tue, 1344° / 24°0
44 °
Simms, Tuesday, 13 October
Clear. High 44°, low 24°.
Pressure29.88 inHg
Wind17.6 mph S
Humidity95%
Visibility—
Dew point36°
Wed, 1451° / 37°0
51 °
Simms, Wednesday, 14 October
Overcast. High 51°, low 37°.
Pressure29.59 inHg
Wind19.5 mph N
Humidity60%
Visibility—
Dew point36°
Thu, 1541° / 33°0
41 °
Simms, Thursday, 15 October
Light snow. High 41°, low 33°.
Pressure30.36 inHg
Wind18.5 mph N
Humidity54%
Visibility—
Dew point22°
Fri, 1644° / 30°0.01
44 °
Simms, Friday, 16 October
Light snow. High 44°, low 30°.
Pressure30.42 inHg
Wind7.9 mph E
Humidity61%
Visibility—
Dew point26°
Sat, 1751° / 30°0
51 °
Simms, Saturday, 17 October
Clear. High 51°, low 30°.
Pressure30.12 inHg
Wind11.4 mph S
Humidity45%
Visibility—
Dew point24°
Sun, 1857° / 33°0
57 °
Simms, Sunday, 18 October
Clear. High 57°, low 33°.
Pressure30.00 inHg
Wind10.3 mph S
Humidity40%
Visibility—
Dew point25°
Mon, 1963° / 36°0
63 °
Simms, Monday, 19 October
Clear. High 63°, low 36°.
Pressure29.83 inHg
Wind15.9 mph S
Humidity39%
Visibility—
Dew point27°
Tue, 2054° / 39°0
54 °
Simms, Tuesday, 20 October
Partly cloudy. High 54°, low 39°.
Pressure30.24 inHg
Wind7.1 mph N
Humidity36%
Visibility—
Dew point23°
Wed, 2161° / 37°0
61 °
Simms, Wednesday, 21 October
Clear. High 61°, low 37°.
Pressure30.12 inHg
Wind9.4 mph S
Humidity38%
Visibility—
Dew point26°
Thu, 2265° / 40°0
65 °
Simms, Thursday, 22 October
Overcast. High 65°, low 40°.
Pressure29.94 inHg
Wind12.4 mph S
Humidity35%
Visibility—
Dew point27°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2353° / 34°0.04
53 °
Simms, Friday, 23 October
Climate normal for this date — 60-year average.
Average high53°
Average low34°
Average precipitation0.04 in
Chance of precipitation20%
Record high72° (1965)
Record low4° (2020)
Sat, 2453° / 32°0.02
53 °
Simms, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high53°
Average low32°
Average precipitation0.02 in
Chance of precipitation13%
Record high72° (2007)
Record low5° (1975)
Sun, 2552° / 33°0.02
52 °
Simms, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high52°
Average low33°
Average precipitation0.02 in
Chance of precipitation7%
Record high71° (1990)
Record low2° (2020)
Mon, 2651° / 32°0.04
51 °
Simms, 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 °
Simms, 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 °
Simms, 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 °
Simms, 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 °
Simms, 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 °
Simms, 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 °
Simms, 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 °
Simms, 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 °
Simms, 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 °
Simms, 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 °
Simms, 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)
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 Simms, 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 Simms, 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.