Monthly outlook for Tattnall, MT: average high 52°, average low 34.5°. That is 1.3° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 22 October (69.9°), the coolest 28 October (28.9°).
52°/34.5°
Average high / low
+1.3°
Above normal
1 / 2
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
53.2°
51.5°
+1°
31 October – 9 November
50°
44.9°
+2.8°
10 November – 19 November
at normal
39.8°
—
October records over 66 years
86.4°1 October 2011All-time high
-6°23 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Valleytown (15 mi).
Thu, 2270° / 38°0
70 °
Tattnall, Thursday, 22 October
Clear. High 70°, low 38°.
Pressure29.91 inHg
Wind1.3 mph S
Humidity60%
Visibility6.2 mi
Dew point46°
Fri, 2362° / 37°0.2
62 °
Tattnall, Friday, 23 October
Rain. High 62°, low 37°.
Pressure29.62 inHg
Wind3.4 mph W
Humidity68%
Visibility6.2 mi
Dew point50°
Sat, 2446° / 31°0
46 °
Tattnall, Saturday, 24 October
Clear. High 46°, low 31°.
Pressure30.42 inHg
Wind8.5 mph W
Humidity66%
Visibility6.2 mi
Dew point24°
Sun, 2546° / 31°0
46 °
Tattnall, Sunday, 25 October
Clear. High 46°, low 31°.
Pressure30.53 inHg
Wind10.3 mph E
Humidity62%
Visibility6.2 mi
Dew point23°
Mon, 2640° / 33°0.01
40 °
Tattnall, Monday, 26 October
Snow. High 40°, low 33°.
Pressure30.59 inHg
Wind8.5 mph SE
Humidity81%
Visibility—
Dew point31°
Tue, 2741° / 32°0
41 °
Tattnall, Tuesday, 27 October
Partly cloudy. High 41°, low 32°.
Pressure30.42 inHg
Wind9.7 mph E
Humidity71%
Visibility—
Dew point31°
Wed, 2848° / 29°0
48 °
Tattnall, Wednesday, 28 October
Mostly clear. High 48°, low 29°.
Pressure30.36 inHg
Wind15.3 mph S
Humidity56%
Visibility—
Dew point25°
Thu, 2953° / 35°0
53 °
Tattnall, Thursday, 29 October
Overcast. High 53°, low 35°.
Pressure29.77 inHg
Wind8.1 mph SW
Humidity44%
Visibility—
Dew point25°
Fri, 3058° / 47°0
58 °
Tattnall, Friday, 30 October
Partly cloudy. High 58°, low 47°.
Pressure29.50 inHg
Wind20.9 mph W
Humidity44%
Visibility—
Dew point33°
Sat, 3147° / 38°0
47 °
Tattnall, Saturday, 31 October
Overcast. High 47°, low 38°.
Pressure29.74 inHg
Wind12.8 mph N
Humidity62%
Visibility—
Dew point30°
Sun, 0144° / 33°0
44 °
Tattnall, Sunday, 1 November
Mostly clear. High 44°, low 33°.
Pressure30.15 inHg
Wind20.1 mph NW
Humidity40%
Visibility—
Dew point19°
Mon, 0245° / 32°0
45 °
Tattnall, Monday, 2 November
Overcast. High 45°, low 32°.
Pressure30.33 inHg
Wind6.6 mph NW
Humidity52%
Visibility—
Dew point25°
Tue, 0354° / 34°0
54 °
Tattnall, Tuesday, 3 November
Partly cloudy. High 54°, low 34°.
Pressure29.97 inHg
Wind15.4 mph W
Humidity44%
Visibility—
Dew point23°
Wed, 0456° / 34°0
56 °
Tattnall, Wednesday, 4 November
Overcast. High 56°, low 34°.
Pressure29.62 inHg
Wind31.7 mph NW
Humidity51%
Visibility—
Dew point37°
Thu, 0554° / 32°0.01
54 °
Tattnall, Thursday, 5 November
Light rain. High 54°, low 32°.
Pressure29.74 inHg
Wind17.4 mph W
Humidity51%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0644° / 26°0.02
44 °
Tattnall, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.02 in
Chance of precipitation12%
Record high65° (2010)
Record low0° (1991)
Sat, 0744° / 28°0.01
44 °
Tattnall, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.01 in
Chance of precipitation7%
Record high68° (2010)
Record low4° (1991)
Sun, 0842° / 26°0.04
42 °
Tattnall, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.04 in
Chance of precipitation23%
Record high64° (1962)
Record low-5° (1973)
Mon, 0940° / 24°0.04
40 °
Tattnall, Monday, 9 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.04 in
Chance of precipitation22%
Record high64° (2016)
Record low3° (2000)
Tue, 1040° / 24°0.02
40 °
Tattnall, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.02 in
Chance of precipitation17%
Record high64° (1989)
Record low1° (2022)
Wed, 1139° / 23°0.02
39 °
Tattnall, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high39°
Average low23°
Average precipitation0.02 in
Chance of precipitation15%
Record high59° (1999)
Record low-14° (2019)
Thu, 1240° / 22°0.03
40 °
Tattnall, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high40°
Average low22°
Average precipitation0.03 in
Chance of precipitation15%
Record high72° (1999)
Record low-6° (2014)
Fri, 1341° / 25°0.02
41 °
Tattnall, Friday, 13 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.02 in
Chance of precipitation17%
Record high62° (1999)
Record low-7° (2014)
Sat, 1441° / 25°0.02
41 °
Tattnall, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.02 in
Chance of precipitation15%
Record high63° (2001)
Record low-3° (2014)
Sun, 1541° / 23°0.01
41 °
Tattnall, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high41°
Average low23°
Average precipitation0.01 in
Chance of precipitation13%
Record high61° (1975)
Record low-10° (2014)
Mon, 1641° / 24°0.02
41 °
Tattnall, Monday, 16 November
Climate normal for this date — 60-year average.
Average high41°
Average low24°
Average precipitation0.02 in
Chance of precipitation13%
Record high62° (2001)
Record low-10° (1996)
Tue, 1738° / 22°0.02
38 °
Tattnall, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high38°
Average low22°
Average precipitation0.02 in
Chance of precipitation10%
Record high59° (1976)
Record low-4° (1996)
Wed, 1839° / 22°0.02
39 °
Tattnall, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high39°
Average low22°
Average precipitation0.02 in
Chance of precipitation20%
Record high64° (2008)
Record low-7° (1978)
Thu, 1937° / 22°0.02
37 °
Tattnall, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high37°
Average low22°
Average precipitation0.02 in
Chance of precipitation15%
Record high57° (1989)
Record low-10° (1978)
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 Tattnall, 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 Tattnall, 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.