Weather in St. Ignatius, MT
St. Ignatius, Monday, 19 October, 20:41
Overcast. Feels like 49°. High 63°, low 36°.
Monthly outlook for St. Ignatius, MT: average high 57.7°, average low 40.8°. That is 3.5° above the climate normal for October. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 6 days and 1.4 inches. The warmest day looks like 20 October (63.7°), the coolest 27 October (34.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 56.9° | 53.6° | +1.8° |
| 29 October – 7 November | 59° | 46.8° | +6.8° |
| 8 November – 17 November | at normal | 42.5° | — |
October records over 66 years
0St. Ignatius, Tuesday, 20 October
Overcast. High 64°, low 38°.
0
St. Ignatius, Wednesday, 21 October
Partly cloudy. High 62°, low 38°.
0
St. Ignatius, Thursday, 22 October
Light rain. High 62°, low 45°.
0.7St. Ignatius, Friday, 23 October
Rain. High 51°, low 46°.
0.11St. Ignatius, Saturday, 24 October
Light rain. High 53°, low 41°.
0
St. Ignatius, Sunday, 25 October
Mostly clear. High 53°, low 38°.
0St. Ignatius, Monday, 26 October
Overcast. High 52°, low 38°.
0
St. Ignatius, Tuesday, 27 October
Clear. High 54°, low 35°.
0St. Ignatius, Wednesday, 28 October
Clear. High 57°, low 38°.
0St. Ignatius, Thursday, 29 October
Overcast. High 60°, low 42°.
0St. Ignatius, Friday, 30 October
Clear. High 59°, low 41°.
0.04St. Ignatius, Saturday, 31 October
Light rain. High 59°, low 46°.
0St. Ignatius, Sunday, 1 November
Partly cloudy. High 60°, low 42°.
0St. Ignatius, Monday, 2 November
Overcast. High 61°, low 44°.
0.03St. Ignatius, Tuesday, 3 November
Light rain. High 55°, low 44°.
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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