Weather in Riverdale, MT
Riverdale, Sunday, 18 October, 09:05
Partly cloudy. Feels like 44°. High 63°, low 42°.
Monthly outlook for Riverdale, MT: average high 50.2°, average low 32.8°. That is 2° below the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 19 October (72°), the coolest 30 October (15.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 55° | 56.2° | -0.7° |
| 28 October – 6 November | 42.3° | 49.3° | -3.9° |
| 7 November – 16 November | at normal | 44.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ulm (6 mi).
0
Riverdale, Monday, 19 October
Overcast. High 72°, low 39°.
0Riverdale, Tuesday, 20 October
Overcast. High 57°, low 38°.
0
Riverdale, Wednesday, 21 October
Mostly clear. High 66°, low 37°.
0.02
Riverdale, Thursday, 22 October
Light rain. High 66°, low 42°.
0.05Riverdale, Friday, 23 October
Light rain. High 53°, low 42°.
0Riverdale, Saturday, 24 October
Overcast. High 45°, low 34°.
0Riverdale, Sunday, 25 October
Overcast. High 45°, low 37°.
0Riverdale, Monday, 26 October
Overcast. High 44°, low 36°.
0.11
Riverdale, Tuesday, 27 October
Snow. High 40°, low 34°.
0Riverdale, Wednesday, 28 October
Light snow. High 51°, low 35°.
0.27Riverdale, Thursday, 29 October
Snow. High 35°, low 23°.
0
Riverdale, Friday, 30 October
Clear. High 34°, low 16°.
0Riverdale, Saturday, 31 October
Partly cloudy. High 40°, low 18°.
0Riverdale, Sunday, 1 November
Overcast. High 39°, low 22°.
0Riverdale, Monday, 2 November
Overcast. High 54°, low 31°.
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.
0.02Riverdale, 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 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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