Weather in Sumatra, MT
Sumatra, Wednesday, 7 October, 04:28
Overcast. Feels like 47°. High 73°, low 49°.
Monthly outlook for Sumatra, MT: average high 57.2°, average low 40.1°. That is 1.8° below the climate normal for October. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 9 October (84.1°), the coolest 12 October (31.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 7 October – 16 October | 59.4° | 60.9° | -0.8° |
| 17 October – 26 October | 53.7° | 58.5° | -2.7° |
| 27 October – 5 November | at normal | 52° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Melstone (15 mi).
0
Sumatra, Thursday, 8 October
Partly cloudy. High 76°, low 42°.
0Sumatra, Friday, 9 October
Partly cloudy. High 84°, low 55°.
0.03
Sumatra, Saturday, 10 October
Light rain. High 65°, low 46°.
0.22
Sumatra, Sunday, 11 October
Snow. High 42°, low 33°.
0.21Sumatra, Monday, 12 October
Snow. High 37°, low 32°.
0
Sumatra, Tuesday, 13 October
Clear. High 66°, low 36°.
0.02Sumatra, Wednesday, 14 October
Light rain. High 57°, low 42°.
0Sumatra, Thursday, 15 October
Overcast. High 44°, low 35°.
0Sumatra, Friday, 16 October
Clear. High 49°, low 34°.
0Sumatra, Saturday, 17 October
Overcast. High 51°, low 39°.
0Sumatra, Sunday, 18 October
Overcast. High 58°, low 39°.
0Sumatra, Monday, 19 October
Clear. High 53°, low 42°.
0Sumatra, Tuesday, 20 October
Overcast. High 50°, low 38°.
0
Sumatra, Wednesday, 21 October
Mostly clear. High 54°, low 37°.
0Sumatra, Thursday, 22 October
Partly cloudy. High 55°, low 42°.
0.03Sumatra, Friday, 23 October
Climate normal for this date — 60-year average.
0.02Sumatra, Saturday, 24 October
Climate normal for this date — 60-year average.
0.03Sumatra, Sunday, 25 October
Climate normal for this date — 60-year average.
0.03Sumatra, Monday, 26 October
Climate normal for this date — 60-year average.
0.02Sumatra, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.04Sumatra, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.04Sumatra, Thursday, 29 October
Climate normal for this date — 60-year average.
0.02Sumatra, Friday, 30 October
Climate normal for this date — 60-year average.
0.06Sumatra, Saturday, 31 October
Climate normal for this date — 60-year average.
0.02Sumatra, Sunday, 1 November
Climate normal for this date — 60-year average.
0.02Sumatra, Monday, 2 November
Climate normal for this date — 60-year average.
0.03Sumatra, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.03Sumatra, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Sumatra, Thursday, 5 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 Sumatra, 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 Sumatra, 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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