Weather in Castner Falls, MT
Castner Falls, Saturday, 10 October, 05:58
Overcast. Feels like 50°. High 55°, low 35°.
Monthly outlook for Castner Falls, MT: average high 51.7°, average low 36°. That is 3.2° below the climate normal for October. Precipitation is expected on 3 days (about 1.7 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 18 October (67.5°), the coolest 14 October (24.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 October – 19 October | 48.7° | 58.1° | -5.2° |
| 20 October – 29 October | 56.7° | 54.8° | +1.1° |
| 30 October – 8 November | at normal | 48.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ulm (8 mi).
0.83
Castner Falls, Sunday, 11 October
Snow. High 36°, low 32°.
0.31Castner Falls, Monday, 12 October
Snow. High 32°, low 24°.
0
Castner Falls, Tuesday, 13 October
Mostly clear. High 35°, low 24°.
0
Castner Falls, Wednesday, 14 October
Clear. High 45°, low 24°.
0.01
Castner Falls, Thursday, 15 October
Light rain. High 49°, low 29°.
0Castner Falls, Friday, 16 October
Clear. High 41°, low 29°.
0Castner Falls, Saturday, 17 October
Mostly clear. High 64°, low 31°.
0Castner Falls, Sunday, 18 October
Overcast. High 68°, low 43°.
0Castner Falls, Monday, 19 October
Overcast. High 61°, low 48°.
0Castner Falls, Tuesday, 20 October
Overcast. High 64°, low 48°.
0Castner Falls, Wednesday, 21 October
Overcast. High 57°, low 44°.
0Castner Falls, Thursday, 22 October
Overcast. High 56°, low 40°.
0.02Castner Falls, Friday, 23 October
Light rain. High 57°, low 45°.
0.03Castner Falls, Saturday, 24 October
Light rain. High 52°, low 38°.
0Castner Falls, Sunday, 25 October
Overcast. High 54°, low 42°.
0.05
Castner Falls, Monday, 26 October
Climate normal for this date — 60-year average.
0.04Castner Falls, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.04Castner Falls, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.04Castner Falls, Thursday, 29 October
Climate normal for this date — 60-year average.
0.02Castner Falls, Friday, 30 October
Climate normal for this date — 60-year average.
0.03Castner Falls, Saturday, 31 October
Climate normal for this date — 60-year average.
0.03Castner Falls, Sunday, 1 November
Climate normal for this date — 60-year average.
0.02Castner Falls, Monday, 2 November
Climate normal for this date — 60-year average.
0.03Castner Falls, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Castner Falls, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Castner Falls, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Castner Falls, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Castner Falls, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Castner Falls, Sunday, 8 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 Castner Falls, 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 Castner Falls, 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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