Monthly outlook for St. Charles, ID: average high 53.7°, average low 39.9°. That is 2.6° above the climate normal for October. Precipitation is expected on 7 days (about 1.4 inches), against a normal of 5 days and 1.1 inches. The warmest day looks like 21 October (66.2°), the coolest 25 October (33.7°).
53.7°/39.9°
Average high / low
+2.6°
Above normal
7 / 5
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
56°
51.1°
+2.7°
30 October – 8 November
49.9°
45°
+2.8°
9 November – 18 November
at normal
40.3°
—
October records over 66 years
80.4°1 October 2010All-time high
0.9°28 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Garden City (12 mi).
Wed, 2166° / 40°0.02
66 °
St. Charles, Wednesday, 21 October
Light rain. High 66°, low 40°.
Pressure30.12 inHg
Wind3.6 mph SE
Humidity72%
Visibility1.8 mi
Dew point45°
Thu, 2258° / 41°0.1
58 °
St. Charles, Thursday, 22 October
Rain. High 58°, low 41°.
Pressure30.03 inHg
Wind2 mph E
Humidity75%
Visibility6.2 mi
Dew point46°
Fri, 2352° / 39°0.37
52 °
St. Charles, Friday, 23 October
Rain. High 52°, low 39°.
Pressure29.85 inHg
Wind7.6 mph S
Humidity49%
Visibility6.2 mi
Dew point34°
Sat, 2449° / 40°0.11
49 °
St. Charles, Saturday, 24 October
Light rain. High 49°, low 40°.
Pressure30.30 inHg
Wind9.1 mph SE
Humidity68%
Visibility—
Dew point34°
Sun, 2553° / 34°0
53 °
St. Charles, Sunday, 25 October
Clear. High 53°, low 34°.
Pressure30.21 inHg
Wind3.1 mph E
Humidity71%
Visibility—
Dew point36°
Mon, 2653° / 37°0
53 °
St. Charles, Monday, 26 October
Clear. High 53°, low 37°.
Pressure30.24 inHg
Wind6.6 mph NW
Humidity50%
Visibility—
Dew point29°
Tue, 2753° / 35°0
53 °
St. Charles, Tuesday, 27 October
Clear. High 53°, low 35°.
Pressure30.36 inHg
Wind7.6 mph S
Humidity47%
Visibility—
Dew point25°
Wed, 2856° / 39°0
56 °
St. Charles, Wednesday, 28 October
Mostly clear. High 56°, low 39°.
Pressure30.15 inHg
Wind2.4 mph SE
Humidity35%
Visibility—
Dew point23°
Thu, 2957° / 43°0
57 °
St. Charles, Thursday, 29 October
Overcast. High 57°, low 43°.
Pressure30.06 inHg
Wind6.3 mph SE
Humidity38%
Visibility—
Dew point26°
Fri, 3048° / 45°0.04
48 °
St. Charles, Friday, 30 October
Light rain. High 48°, low 45°.
Pressure30.12 inHg
Wind5.5 mph S
Humidity73%
Visibility—
Dew point39°
Sat, 3156° / 42°0.02
56 °
St. Charles, Saturday, 31 October
Light rain. High 56°, low 42°.
Pressure30.06 inHg
Wind6.2 mph W
Humidity60%
Visibility—
Dew point38°
Sun, 0155° / 43°0.02
55 °
St. Charles, Sunday, 1 November
Light rain. High 55°, low 43°.
Pressure29.94 inHg
Wind10.2 mph S
Humidity47%
Visibility—
Dew point33°
Mon, 0250° / 40°0.31
50 °
St. Charles, Monday, 2 November
Snow. High 50°, low 40°.
Pressure29.94 inHg
Wind7.3 mph NW
Humidity63%
Visibility—
Dew point36°
Tue, 0345° / 37°0.13
45 °
St. Charles, Tuesday, 3 November
Snow. High 45°, low 37°.
Pressure30.12 inHg
Wind7.4 mph W
Humidity68%
Visibility—
Dew point34°
Wed, 0446° / 36°0.02
46 °
St. Charles, Wednesday, 4 November
Light rain. High 46°, low 36°.
Pressure30.18 inHg
Wind9.3 mph W
Humidity68%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0545° / 31°0.08
45 °
St. Charles, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high45°
Average low31°
Average precipitation0.08 in
Chance of precipitation33%
Record high62° (2020)
Record low12° (1961)
Fri, 0645° / 31°0.05
45 °
St. Charles, Friday, 6 November
Climate normal for this date — 60-year average.
Average high45°
Average low31°
Average precipitation0.05 in
Chance of precipitation28%
Record high64° (2020)
Record low9° (1971)
Sat, 0744° / 30°0.09
44 °
St. Charles, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.09 in
Chance of precipitation32%
Record high62° (1999)
Record low4° (2003)
Sun, 0843° / 29°0.11
43 °
St. Charles, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high43°
Average low29°
Average precipitation0.11 in
Chance of precipitation40%
Record high58° (2016)
Record low11° (2018)
Mon, 0942° / 28°0.11
42 °
St. Charles, Monday, 9 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.11 in
Chance of precipitation38%
Record high59° (2016)
Record low11° (1966)
Tue, 1041° / 27°0.07
41 °
St. Charles, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high41°
Average low27°
Average precipitation0.07 in
Chance of precipitation42%
Record high59° (2016)
Record low6° (1985)
Wed, 1141° / 27°0.07
41 °
St. Charles, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high41°
Average low27°
Average precipitation0.07 in
Chance of precipitation28%
Record high59° (1999)
Record low1° (2000)
Thu, 1241° / 28°0.09
41 °
St. Charles, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high41°
Average low28°
Average precipitation0.09 in
Chance of precipitation35%
Record high61° (1999)
Record low2° (2014)
Fri, 1341° / 27°0.07
41 °
St. Charles, Friday, 13 November
Climate normal for this date — 60-year average.
Average high41°
Average low27°
Average precipitation0.07 in
Chance of precipitation40%
Record high59° (1999)
Record low5° (2014)
Sat, 1440° / 26°0.11
40 °
St. Charles, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.11 in
Chance of precipitation35%
Record high60° (1999)
Record low3° (2000)
Sun, 1540° / 24°0.04
40 °
St. Charles, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.04 in
Chance of precipitation18%
Record high61° (1999)
Record low0° (1997)
Mon, 1639° / 26°0.06
39 °
St. Charles, Monday, 16 November
Climate normal for this date — 60-year average.
Average high39°
Average low26°
Average precipitation0.06 in
Chance of precipitation33%
Record high60° (1999)
Record low-2° (2014)
Tue, 1739° / 26°0.11
39 °
St. Charles, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high39°
Average low26°
Average precipitation0.11 in
Chance of precipitation38%
Record high56° (1999)
Record low4° (2014)
Wed, 1838° / 25°0.11
38 °
St. Charles, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high38°
Average low25°
Average precipitation0.11 in
Chance of precipitation42%
Record high55° (2008)
Record low7° (2000)
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. Charles, ID 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. Charles, ID 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.