Weather in Tattnall, MT
Tattnall, Sunday, 18 October, 21:31
Partly cloudy. Feels like 37°. High 59°, low 37°.
Monthly outlook for Tattnall, MT: average high 51.4°, average low 35.5°. That is 0.1° below the climate normal for October. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 22 October (66.7°), the coolest 31 October (18.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 55.5° | 54° | +0.8° |
| 28 October – 6 November | 44.6° | 46.8° | -1.2° |
| 7 November – 16 November | at normal | 40.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Valleytown (15 mi).
0
Tattnall, Monday, 19 October
Overcast. High 63°, low 36°.
0
Tattnall, Tuesday, 20 October
Partly cloudy. High 61°, low 37°.
0
Tattnall, Wednesday, 21 October
Clear. High 62°, low 38°.
0Tattnall, Thursday, 22 October
Clear. High 67°, low 46°.
0.31
Tattnall, Friday, 23 October
Rain. High 62°, low 50°.
0
Tattnall, Saturday, 24 October
Mostly clear. High 50°, low 37°.
0.17
Tattnall, Sunday, 25 October
Snow. High 36°, low 34°.
0Tattnall, Monday, 26 October
Overcast. High 44°, low 34°.
0Tattnall, Tuesday, 27 October
Overcast. High 51°, low 36°.
0Tattnall, Wednesday, 28 October
Overcast. High 56°, low 41°.
0.41Tattnall, Thursday, 29 October
Snow. High 48°, low 34°.
0.26Tattnall, Friday, 30 October
Snow. High 32°, low 22°.
0Tattnall, Saturday, 31 October
Overcast. High 39°, low 18°.
0Tattnall, Sunday, 1 November
Partly cloudy. High 44°, low 30°.
0Tattnall, Monday, 2 November
Overcast. High 48°, low 37°.
0.02Tattnall, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Tattnall, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.02Tattnall, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Tattnall, Friday, 6 November
Climate normal for this date — 60-year average.
0.01Tattnall, Saturday, 7 November
Climate normal for this date — 60-year average.
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.
0.02Tattnall, 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.
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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