Weather in Tattnall, MT
Tattnall, Friday, 23 October, 01:15
Mostly clear. Feels like 45°. High 65°, low 32°.
Monthly outlook for Tattnall, MT: average high 45.3°, average low 33.3°. That is 1.7° below the climate normal for October. Precipitation is expected on 5 days (about 1.2 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 23 October (64.9°), the coolest 24 October (26.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 23 October – 1 November | 43.4° | 50° | -3.7° |
| 2 November – 11 November | 48.4° | 43.4° | +2.8° |
| 12 November – 21 November | at normal | 39.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Valleytown (15 mi).
0
Tattnall, Saturday, 24 October
Overcast. High 47°, low 26°.
0
Tattnall, Sunday, 25 October
Clear. High 47°, low 29°.
0Tattnall, Monday, 26 October
Overcast. High 47°, low 35°.
0.05
Tattnall, Tuesday, 27 October
Light rain. High 39°, low 35°.
0.16
Tattnall, Wednesday, 28 October
Snow. High 39°, low 32°.
0
Tattnall, Thursday, 29 October
Partly cloudy. High 35°, low 28°.
0.03Tattnall, Friday, 30 October
Light snow. High 41°, low 29°.
0.46Tattnall, Saturday, 31 October
Snow. High 35°, low 34°.
0.12Tattnall, Sunday, 1 November
Light snow. High 39°, low 32°.
0Tattnall, Monday, 2 November
Clear. High 40°, low 31°.
0Tattnall, Tuesday, 3 November
Overcast. High 43°, low 32°.
0Tattnall, Wednesday, 4 November
Overcast. High 46°, low 34°.
0Tattnall, Thursday, 5 November
Clear. High 57°, low 39°.
0Tattnall, Friday, 6 November
Clear. High 56°, low 41°.
0Tattnall, Saturday, 7 November
Clear. High 48°, low 43°.
0.04Tattnall, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04Tattnall, Monday, 9 November
Climate normal for this date — 60-year average.
0.02
Tattnall, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.02Tattnall, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.03Tattnall, Thursday, 12 November
Climate normal for this date — 60-year average.
0.02Tattnall, Friday, 13 November
Climate normal for this date — 60-year average.
0.02Tattnall, Saturday, 14 November
Climate normal for this date — 60-year average.
0.01Tattnall, Sunday, 15 November
Climate normal for this date — 60-year average.
0.02Tattnall, Monday, 16 November
Climate normal for this date — 60-year average.
0.02Tattnall, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.02Tattnall, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.02Tattnall, Thursday, 19 November
Climate normal for this date — 60-year average.
0.02Tattnall, Friday, 20 November
Climate normal for this date — 60-year average.
0.02Tattnall, Saturday, 21 November
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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