Monthly outlook for Tattnall, MT: average high 49.9°, average low 36.9°. That is 1.7° 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 9 November (64.4°), the coolest 30 October (26.4°).
49.9°/36.9°
Average high / low
+1.7°
Above normal
1 / 2
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
47.5°
48.6°
-0.6°
4 November – 13 November
53.8°
42.3°
+6.4°
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, 2644° / 31°0
44 °
Tattnall, Monday, 26 October
Overcast. High 44°, low 31°.
Pressure30.33 inHg
Wind17.4 mph SE
Humidity67%
Visibility6.2 mi
Dew point28°
Tue, 2737° / 35°0.16
37 °
Tattnall, Tuesday, 27 October
Light rain. High 37°, low 35°.
Pressure29.88 inHg
Wind7.9 mph SE
Humidity85%
Visibility6.2 mi
Dew point33°
Wed, 2854° / 39°0.01
54 °
Tattnall, Wednesday, 28 October
Light rain. High 54°, low 39°.
Pressure29.91 inHg
Wind9.8 mph W
Humidity54%
Visibility6.2 mi
Dew point33°
Thu, 2943° / 32°0
43 °
Tattnall, Thursday, 29 October
Partly cloudy. High 43°, low 32°.
Pressure30.27 inHg
Wind12.2 mph NW
Humidity76%
Visibility—
Dew point31°
Fri, 3043° / 26°0.01
43 °
Tattnall, Friday, 30 October
Light rain. High 43°, low 26°.
Pressure30.33 inHg
Wind10.1 mph E
Humidity75%
Visibility—
Dew point28°
Sat, 3153° / 38°0
53 °
Tattnall, Saturday, 31 October
Mostly clear. High 53°, low 38°.
Pressure30.00 inHg
Wind6.8 mph SE
Humidity54%
Visibility—
Dew point31°
Sun, 0160° / 43°0
60 °
Tattnall, Sunday, 1 November
Overcast. High 60°, low 43°.
Pressure29.83 inHg
Wind8.3 mph E
Humidity58%
Visibility—
Dew point37°
Mon, 0249° / 40°0
49 °
Tattnall, Monday, 2 November
Overcast. High 49°, low 40°.
Pressure29.62 inHg
Wind17.5 mph N
Humidity59%
Visibility—
Dew point33°
Tue, 0349° / 38°0
49 °
Tattnall, Tuesday, 3 November
Overcast. High 49°, low 38°.
Pressure30.06 inHg
Wind22.6 mph NW
Humidity56%
Visibility—
Dew point29°
Wed, 0454° / 38°0
54 °
Tattnall, Wednesday, 4 November
Overcast. High 54°, low 38°.
Pressure29.94 inHg
Wind6.8 mph SE
Humidity48%
Visibility—
Dew point29°
Thu, 0553° / 40°0
53 °
Tattnall, Thursday, 5 November
Mostly clear. High 53°, low 40°.
Pressure29.85 inHg
Wind8.6 mph E
Humidity49%
Visibility—
Dew point31°
Fri, 0648° / 43°0
48 °
Tattnall, Friday, 6 November
Overcast. High 48°, low 43°.
Pressure29.44 inHg
Wind16 mph E
Humidity46%
Visibility—
Dew point28°
Sat, 0754° / 39°0
54 °
Tattnall, Saturday, 7 November
Overcast. High 54°, low 39°.
Pressure29.53 inHg
Wind18.1 mph W
Humidity54%
Visibility—
Dew point34°
Sun, 0849° / 35°0
49 °
Tattnall, Sunday, 8 November
Mostly clear. High 49°, low 35°.
Pressure29.97 inHg
Wind8.5 mph SE
Humidity62%
Visibility—
Dew point31°
Mon, 0964° / 44°0
64 °
Tattnall, Monday, 9 November
Mostly clear. High 64°, low 44°.
Pressure29.91 inHg
Wind6.5 mph S
Humidity54%
Visibility—
Dew point39°
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.