Weather in St. Ignatius, MT
St. Ignatius, Monday, 19 October, 06:24
Overcast. Feels like 37°. High 63°, low 37°.
Monthly outlook for St. Ignatius, MT: average high 53.1°, average low 36.8°. That is 1° above the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 6 days and 1.4 inches. The warmest day looks like 19 October (63.2°), the coolest 28 October (27.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 54.1° | 53.6° | +0.2° |
| 29 October – 7 November | 51.4° | 46.8° | +2.6° |
| 8 November – 17 November | at normal | 42.5° | — |
October records over 66 years
0St. Ignatius, Tuesday, 20 October
Overcast. High 62°, low 40°.
0
St. Ignatius, Wednesday, 21 October
Partly cloudy. High 63°, low 44°.
0St. Ignatius, Thursday, 22 October
Overcast. High 59°, low 47°.
0.52
St. Ignatius, Friday, 23 October
Rain. High 49°, low 42°.
0.02St. Ignatius, Saturday, 24 October
Light rain. High 49°, low 34°.
0.1St. Ignatius, Sunday, 25 October
Light rain. High 54°, low 39°.
0.01St. Ignatius, Monday, 26 October
Light rain. High 45°, low 40°.
0
St. Ignatius, Tuesday, 27 October
Clear. High 46°, low 29°.
0St. Ignatius, Wednesday, 28 October
Clear. High 51°, low 28°.
0St. Ignatius, Thursday, 29 October
Overcast. High 59°, low 36°.
0St. Ignatius, Friday, 30 October
Partly cloudy. High 55°, low 39°.
0St. Ignatius, Saturday, 31 October
Overcast. High 54°, low 37°.
0.06
St. Ignatius, Sunday, 1 November
Snow. High 48°, low 33°.
0St. Ignatius, Monday, 2 November
Overcast. High 44°, low 32°.
0St. Ignatius, Tuesday, 3 November
Overcast. High 48°, low 31°.
0.11St. Ignatius, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.11St. Ignatius, Thursday, 5 November
Climate normal for this date — 60-year average.
0.13St. Ignatius, Friday, 6 November
Climate normal for this date — 60-year average.
0.13
St. Ignatius, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09St. Ignatius, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1St. Ignatius, Monday, 9 November
Climate normal for this date — 60-year average.
0.07St. Ignatius, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.09St. Ignatius, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.11St. Ignatius, Thursday, 12 November
Climate normal for this date — 60-year average.
0.1St. Ignatius, Friday, 13 November
Climate normal for this date — 60-year average.
0.09St. Ignatius, Saturday, 14 November
Climate normal for this date — 60-year average.
0.04St. Ignatius, Sunday, 15 November
Climate normal for this date — 60-year average.
0.1St. Ignatius, Monday, 16 November
Climate normal for this date — 60-year average.
0.09St. Ignatius, Tuesday, 17 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 St. Ignatius, 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 St. Ignatius, 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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