Weather in Riverdale, MT
Riverdale, Saturday, 17 October, 06:00
Overcast. Feels like 38°. High 72°, low 43°.
Monthly outlook for Riverdale, MT: average high 52.4°, average low 34°. That is 1.1° below the climate normal for October. Precipitation is expected on 2 days (about 2.5 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 17 October (72.1°), the coolest 25 October (24.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 56° | 56.7° | -0.4° |
| 27 October – 5 November | 46.5° | 49.9° | -1.9° |
| 6 November – 15 November | at normal | 44.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ulm (6 mi).
0
Riverdale, Sunday, 18 October
Partly cloudy. High 61°, low 36°.
0Riverdale, Monday, 19 October
Partly cloudy. High 67°, low 36°.
0Riverdale, Tuesday, 20 October
Overcast. High 56°, low 40°.
0
Riverdale, Wednesday, 21 October
Clear. High 67°, low 37°.
0.01
Riverdale, Thursday, 22 October
Light rain. High 71°, low 41°.
2.24
Riverdale, Friday, 23 October
Snow. High 52°, low 33°.
0.22Riverdale, Saturday, 24 October
Snow. High 36°, low 28°.
0.01Riverdale, Sunday, 25 October
Light rain. High 38°, low 25°.
0Riverdale, Monday, 26 October
Partly cloudy. High 40°, low 33°.
0Riverdale, Tuesday, 27 October
Overcast. High 43°, low 33°.
0Riverdale, Wednesday, 28 October
Clear. High 44°, low 31°.
0Riverdale, Thursday, 29 October
Overcast. High 47°, low 34°.
0Riverdale, Friday, 30 October
Clear. High 46°, low 31°.
0Riverdale, Saturday, 31 October
Clear. High 47°, low 32°.
0Riverdale, Sunday, 1 November
Partly cloudy. High 53°, low 30°.
0.02
Riverdale, Monday, 2 November
Climate normal for this date — 60-year average.
0.03Riverdale, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Riverdale, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Riverdale, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Riverdale, Friday, 6 November
Climate normal for this date — 60-year average.
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.
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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