Monthly outlook for Tattnall, MT: average high 47°, average low 33.3°. That is 0.3° below the climate normal for October. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 8 November (55.6°), the coolest 5 November (22.2°).
47°/33.3°
Average high / low
−0.3°
Below normal
2 / 2
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
47.5°
49.3°
-1°
3 November – 12 November
46.2°
42.8°
+1.9°
13 November – 22 November
at normal
38.7°
—
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).
Sun, 2546° / 29°0
46 °
Tattnall, Sunday, 25 October
Clear. High 46°, low 29°.
Pressure30.56 inHg
Wind9.6 mph NE
Humidity63%
Visibility6.2 mi
Dew point21°
Mon, 2647° / 32°0
47 °
Tattnall, Monday, 26 October
Partly cloudy. High 47°, low 32°.
Pressure30.33 inHg
Wind17 mph SE
Humidity63%
Visibility6.2 mi
Dew point27°
Tue, 2737° / 33°0.26
37 °
Tattnall, Tuesday, 27 October
Snow. High 37°, low 33°.
Pressure29.94 inHg
Wind8.2 mph SE
Humidity93%
Visibility2.6 mi
Dew point31°
Wed, 2849° / 35°0.02
49 °
Tattnall, Wednesday, 28 October
Light rain. High 49°, low 35°.
Pressure29.97 inHg
Wind12.6 mph NW
Humidity71%
Visibility—
Dew point33°
Thu, 2948° / 33°0
48 °
Tattnall, Thursday, 29 October
Overcast. High 48°, low 33°.
Pressure30.00 inHg
Wind13.8 mph NE
Humidity63%
Visibility—
Dew point31°
Fri, 3053° / 38°0
53 °
Tattnall, Friday, 30 October
Overcast. High 53°, low 38°.
Pressure30.03 inHg
Wind13.6 mph E
Humidity38%
Visibility—
Dew point23°
Sat, 3154° / 39°0
54 °
Tattnall, Saturday, 31 October
Overcast. High 54°, low 39°.
Pressure30.00 inHg
Wind8.2 mph S
Humidity34%
Visibility—
Dew point21°
Sun, 0147° / 35°0.04
47 °
Tattnall, Sunday, 1 November
Light rain. High 47°, low 35°.
Pressure30.18 inHg
Wind17.2 mph NW
Humidity60%
Visibility—
Dew point31°
Mon, 0249° / 32°0
49 °
Tattnall, Monday, 2 November
Clear. High 49°, low 32°.
Pressure30.47 inHg
Wind9.8 mph NW
Humidity29%
Visibility—
Dew point12°
Tue, 0352° / 34°0
52 °
Tattnall, Tuesday, 3 November
Clear. High 52°, low 34°.
Pressure30.39 inHg
Wind7.2 mph N
Humidity29%
Visibility—
Dew point15°
Wed, 0439° / 31°0
39 °
Tattnall, Wednesday, 4 November
Overcast. High 39°, low 31°.
Pressure30.47 inHg
Wind13.1 mph N
Humidity52%
Visibility—
Dew point20°
Thu, 0531° / 22°0
31 °
Tattnall, Thursday, 5 November
Clear. High 31°, low 22°.
Pressure30.56 inHg
Wind10.6 mph SE
Humidity34%
Visibility—
Dew point3°
Fri, 0645° / 23°0
45 °
Tattnall, Friday, 6 November
Overcast. High 45°, low 23°.
Pressure30.03 inHg
Wind22.3 mph S
Humidity48%
Visibility—
Dew point17°
Sat, 0755° / 45°0
55 °
Tattnall, Saturday, 7 November
Overcast. High 55°, low 45°.
Pressure29.62 inHg
Wind31.2 mph W
Humidity41%
Visibility—
Dew point30°
Sun, 0856° / 41°0
56 °
Tattnall, Sunday, 8 November
Partly cloudy. High 56°, low 41°.
Pressure30.09 inHg
Wind14.1 mph NW
Humidity37%
Visibility—
Dew point25°
From day 17 onward the outlook is built from 60-year climate statistics
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)
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)
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.