Weather in St. Ignatius, MT
St. Ignatius, Thursday, 15 October, 18:01
Clear. Feels like 54°. High 57°, low 35°.
Monthly outlook for St. Ignatius, MT: average high 55.7°, average low 39.2°. That is 1.1° above the climate normal for October. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 6 days and 1.3 inches. The warmest day looks like 17 October (67.1°), the coolest 25 October (32.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 October – 24 October | 57.7° | 55.9° | +1° |
| 25 October – 3 November | 52.3° | 49° | +1.8° |
| 4 November – 13 November | at normal | 44° | — |
October records over 66 years
0
St. Ignatius, Friday, 16 October
Overcast. High 63°, low 36°.
0St. Ignatius, Saturday, 17 October
Overcast. High 67°, low 42°.
0St. Ignatius, Sunday, 18 October
Clear. High 56°, low 40°.
0St. Ignatius, Monday, 19 October
Overcast. High 59°, low 42°.
0St. Ignatius, Tuesday, 20 October
Overcast. High 59°, low 45°.
0.02
St. Ignatius, Wednesday, 21 October
Light rain. High 61°, low 45°.
0.09St. Ignatius, Thursday, 22 October
Light rain. High 59°, low 47°.
0.09
St. Ignatius, Friday, 23 October
Snow. High 49°, low 39°.
0.01St. Ignatius, Saturday, 24 October
Snow. High 47°, low 35°.
0St. Ignatius, Sunday, 25 October
Overcast. High 49°, low 32°.
0St. Ignatius, Monday, 26 October
Overcast. High 53°, low 34°.
0.06St. Ignatius, Tuesday, 27 October
Light rain. High 50°, low 46°.
0.41St. Ignatius, Wednesday, 28 October
Rain. High 52°, low 38°.
0St. Ignatius, Thursday, 29 October
Clear. High 55°, low 33°.
0St. Ignatius, Friday, 30 October
Clear. High 54°, low 36°.
0.11
St. Ignatius, Saturday, 31 October
Climate normal for this date — 60-year average.
0.11St. Ignatius, Sunday, 1 November
Climate normal for this date — 60-year average.
0.11St. Ignatius, Monday, 2 November
Climate normal for this date — 60-year average.
0.06
St. Ignatius, Tuesday, 3 November
Climate normal for this date — 60-year average.
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.
0.13St. 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.
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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