Weather in Riverdale, MT
Riverdale, Thursday, 22 October, 20:08
Clear. Feels like 56°. High 71°, low 39°.
Monthly outlook for Riverdale, MT: average high 41.3°, average low 24.9°. That is 5.6° below the climate normal for October. Precipitation is expected on 5 days (about 1.5 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (70.9°), the coolest 30 October (14.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 22 October – 31 October | 41.8° | 53° | -6.2° |
| 1 November – 10 November | 40.4° | 47° | -3.7° |
| 11 November – 20 November | at normal | 43.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ulm (6 mi).
0.71
Riverdale, Friday, 23 October
Snow. High 51°, low 28°.
0
Riverdale, Saturday, 24 October
Clear. High 47°, low 20°.
0Riverdale, Sunday, 25 October
Clear. High 39°, low 25°.
0
Riverdale, Monday, 26 October
Overcast. High 42°, low 26°.
0.19
Riverdale, Tuesday, 27 October
Light rain. High 39°, low 30°.
0.13Riverdale, Wednesday, 28 October
Snow. High 40°, low 25°.
0.02Riverdale, Thursday, 29 October
Light snow. High 25°, low 15°.
0.19Riverdale, Friday, 30 October
Snow. High 27°, low 15°.
0.01Riverdale, Saturday, 31 October
Light snow. High 36°, low 22°.
0.24Riverdale, Sunday, 1 November
Snow. High 34°, low 20°.
0Riverdale, Monday, 2 November
Clear. High 33°, low 17°.
0
Riverdale, Tuesday, 3 November
Partly cloudy. High 35°, low 20°.
0Riverdale, Wednesday, 4 November
Overcast. High 39°, low 26°.
0Riverdale, Thursday, 5 November
Clear. High 46°, low 33°.
0
Riverdale, Friday, 6 November
Mostly clear. High 55°, low 37°.
0.02Riverdale, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Riverdale, Sunday, 8 November
Climate normal for this date — 60-year average.
0.05Riverdale, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Riverdale, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.03Riverdale, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.02Riverdale, Thursday, 12 November
Climate normal for this date — 60-year average.
0.02Riverdale, Friday, 13 November
Climate normal for this date — 60-year average.
0.02Riverdale, Saturday, 14 November
Climate normal for this date — 60-year average.
0.01Riverdale, Sunday, 15 November
Climate normal for this date — 60-year average.
0.02Riverdale, Monday, 16 November
Climate normal for this date — 60-year average.
0.04Riverdale, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.04Riverdale, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.04Riverdale, Thursday, 19 November
Climate normal for this date — 60-year average.
0.02Riverdale, Friday, 20 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 Riverdale, 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 Riverdale, 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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