Monthly outlook for Tattnall, MT: average high 49.4°, average low 36.1°. That is 1.4° above the climate normal for October. Precipitation is expected on 2 days (about 0.7 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 1 November (57.1°), the coolest 30 October (26.5°).
49.4°/36.1°
Average high / low
+1.4°
Above normal
2 / 2
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
47.7°
48.6°
-0.5°
4 November – 13 November
52.2°
42.3°
+5.5°
14 November – 23 November
at normal
38.1°
—
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).
Mon, 2645° / 30°0
45 °
Tattnall, Monday, 26 October
Mostly clear. High 45°, low 30°.
Pressure30.33 inHg
Wind16.5 mph SE
Humidity68%
Visibility6.2 mi
Dew point30°
Tue, 2738° / 34°0.19
38 °
Tattnall, Tuesday, 27 October
Snow. High 38°, low 34°.
Pressure29.85 inHg
Wind7.4 mph SE
Humidity89%
Visibility6.1 mi
Dew point35°
Wed, 2853° / 35°0
53 °
Tattnall, Wednesday, 28 October
Clear. High 53°, low 35°.
Pressure29.91 inHg
Wind11.3 mph W
Humidity52%
Visibility6.2 mi
Dew point32°
Thu, 2942° / 30°0.01
42 °
Tattnall, Thursday, 29 October
Light rain. High 42°, low 30°.
Pressure30.24 inHg
Wind8.1 mph NW
Humidity73%
Visibility6.2 mi
Dew point25°
Fri, 3042° / 26°0.02
42 °
Tattnall, Friday, 30 October
Light rain. High 42°, low 26°.
Pressure30.21 inHg
Wind11.1 mph E
Humidity73%
Visibility—
Dew point28°
Sat, 3153° / 31°0
53 °
Tattnall, Saturday, 31 October
Clear. High 53°, low 31°.
Pressure30.06 inHg
Wind3.8 mph N
Humidity58%
Visibility—
Dew point30°
Sun, 0157° / 42°0
57 °
Tattnall, Sunday, 1 November
Overcast. High 57°, low 42°.
Pressure29.88 inHg
Wind20.2 mph SE
Humidity64%
Visibility—
Dew point38°
Mon, 0253° / 41°0.42
53 °
Tattnall, Monday, 2 November
Rain. High 53°, low 41°.
Pressure29.71 inHg
Wind20.3 mph NW
Humidity89%
Visibility—
Dew point42°
Tue, 0350° / 39°0.02
50 °
Tattnall, Tuesday, 3 November
Snow. High 50°, low 39°.
Pressure30.06 inHg
Wind10.8 mph NW
Humidity54%
Visibility—
Dew point29°
Wed, 0453° / 38°0
53 °
Tattnall, Wednesday, 4 November
Overcast. High 53°, low 38°.
Pressure30.00 inHg
Wind7.2 mph SE
Humidity53%
Visibility—
Dew point31°
Thu, 0554° / 39°0
54 °
Tattnall, Thursday, 5 November
Clear. High 54°, low 39°.
Pressure29.77 inHg
Wind16.8 mph SE
Humidity56%
Visibility—
Dew point33°
Fri, 0657° / 47°0.02
57 °
Tattnall, Friday, 6 November
Light rain. High 57°, low 47°.
Pressure29.53 inHg
Wind23.4 mph W
Humidity50%
Visibility—
Dew point36°
Sat, 0753° / 43°0
53 °
Tattnall, Saturday, 7 November
Partly cloudy. High 53°, low 43°.
Pressure29.65 inHg
Wind23.8 mph W
Humidity44%
Visibility—
Dew point28°
Sun, 0849° / 39°0
49 °
Tattnall, Sunday, 8 November
Clear. High 49°, low 39°.
Pressure29.94 inHg
Wind19.1 mph W
Humidity41%
Visibility—
Dew point23°
Mon, 0948° / 36°0
48 °
Tattnall, Monday, 9 November
Clear. High 48°, low 36°.
Pressure30.21 inHg
Wind18.3 mph NW
Humidity52%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Fri, 2037° / 21°0.02
37 °
Tattnall, Friday, 20 November
Climate normal for this date — 60-year average.
Average high37°
Average low21°
Average precipitation0.02 in
Chance of precipitation8%
Record high58° (1968)
Record low-15° (1978)
Sat, 2136° / 20°0.02
36 °
Tattnall, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high36°
Average low20°
Average precipitation0.02 in
Chance of precipitation17%
Record high60° (1974)
Record low-16° (1996)
Sun, 2235° / 20°0.02
35 °
Tattnall, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high35°
Average low20°
Average precipitation0.02 in
Chance of precipitation15%
Record high55° (2005)
Record low-13° (1996)
Mon, 2335° / 19°0.02
35 °
Tattnall, Monday, 23 November
Climate normal for this date — 60-year average.
Average high35°
Average low19°
Average precipitation0.02 in
Chance of precipitation12%
Record high63° (2017)
Record low-30° (1985)
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.