Monthly outlook for St. Charles, ID: average high 51.2°, average low 34.4°. That is 0.3° above the climate normal for October. Precipitation is expected on 7 days (about 1.8 inches), against a normal of 5 days and 1.1 inches. The warmest day looks like 17 October (68°), the coolest 31 October (25.2°).
51.2°/34.4°
Average high / low
+0.3°
Above normal
7 / 5
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
55.5°
53°
+1.4°
27 October – 5 November
44°
46.3°
-1.3°
6 November – 15 November
at normal
41.8°
—
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).
Sun, 1866° / 38°0
66 °
St. Charles, Sunday, 18 October
Clear. High 66°, low 38°.
Pressure30.12 inHg
Wind1.9 mph E
Humidity43%
Visibility6.2 mi
Dew point31°
Mon, 1959° / 37°0
59 °
St. Charles, Monday, 19 October
Clear. High 59°, low 37°.
Pressure30.06 inHg
Wind2.7 mph E
Humidity55%
Visibility6.2 mi
Dew point37°
Tue, 2057° / 42°0.21
57 °
St. Charles, Tuesday, 20 October
Light rain. High 57°, low 42°.
Pressure30.06 inHg
Wind2.1 mph E
Humidity70%
Visibility6.2 mi
Dew point44°
Wed, 2158° / 41°0.27
58 °
St. Charles, Wednesday, 21 October
Rain. High 58°, low 41°.
Pressure30.15 inHg
Wind3.1 mph SE
Humidity74%
Visibility—
Dew point43°
Thu, 2260° / 41°0.47
60 °
St. Charles, Thursday, 22 October
Rain. High 60°, low 41°.
Pressure30.03 inHg
Wind9.1 mph E
Humidity70%
Visibility—
Dew point43°
Fri, 2348° / 37°0.24
48 °
St. Charles, Friday, 23 October
Snow. High 48°, low 37°.
Pressure29.77 inHg
Wind17.2 mph W
Humidity80%
Visibility—
Dew point40°
Sat, 2443° / 30°0
43 °
St. Charles, Saturday, 24 October
Overcast. High 43°, low 30°.
Pressure30.21 inHg
Wind9.1 mph NW
Humidity72%
Visibility—
Dew point28°
Sun, 2546° / 32°0
46 °
St. Charles, Sunday, 25 October
Partly cloudy. High 46°, low 32°.
Pressure30.21 inHg
Wind4.7 mph W
Humidity59%
Visibility—
Dew point27°
Mon, 2651° / 36°0
51 °
St. Charles, Monday, 26 October
Overcast. High 51°, low 36°.
Pressure30.00 inHg
Wind5.6 mph NW
Humidity43%
Visibility—
Dew point24°
Tue, 2751° / 35°0.2
51 °
St. Charles, Tuesday, 27 October
Snow. High 51°, low 35°.
Pressure29.71 inHg
Wind13.6 mph W
Humidity41%
Visibility—
Dew point25°
Wed, 2843° / 29°0
43 °
St. Charles, Wednesday, 28 October
Clear. High 43°, low 29°.
Pressure30.18 inHg
Wind22 mph W
Humidity56%
Visibility—
Dew point23°
Thu, 2952° / 34°0.15
52 °
St. Charles, Thursday, 29 October
Snow. High 52°, low 34°.
Pressure29.83 inHg
Wind13.6 mph SW
Humidity46%
Visibility—
Dew point28°
Fri, 3040° / 30°0.29
40 °
St. Charles, Friday, 30 October
Snow. High 40°, low 30°.
Pressure29.71 inHg
Wind12.5 mph NW
Humidity79%
Visibility—
Dew point31°
Sat, 3137° / 25°0.01
37 °
St. Charles, Saturday, 31 October
Light snow. High 37°, low 25°.
Pressure30.03 inHg
Wind12.3 mph NW
Humidity65%
Visibility—
Dew point23°
Sun, 0141° / 26°0
41 °
St. Charles, Sunday, 1 November
Clear. High 41°, low 26°.
Pressure30.30 inHg
Wind8.2 mph W
Humidity59%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0245° / 30°0.06
45 °
St. Charles, Monday, 2 November
Climate normal for this date — 60-year average.
Average high45°
Average low30°
Average precipitation0.06 in
Chance of precipitation28%
Record high61° (2020)
Record low10° (1991)
Tue, 0346° / 30°0.05
46 °
St. Charles, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.05 in
Chance of precipitation18%
Record high63° (2020)
Record low5° (1991)
Wed, 0446° / 30°0.06
46 °
St. Charles, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.06 in
Chance of precipitation23%
Record high62° (2020)
Record low11° (1973)
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)
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.