Monthly outlook for Casto, ID: average high 51.5°, average low 30.8°. That is 0.4° below the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 18 October (60.7°), the coolest 14 October (23.3°).
51.5°/30.8°
Average high / low
−0.4°
Below normal
2 / 4
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
49.4°
53.6°
-2.3°
21 October – 30 October
54.9°
48.5°
+3.6°
31 October – 9 November
at normal
43.5°
—
October records over 66 years
82.2°2 October 2010All-time high
-8.5°27 October 1970All-time low
Mon, 1236° / 28°0.09
36 °
Casto, Monday, 12 October
Snow. High 36°, low 28°.
Pressure29.91 inHg
Wind1.5 mph N
Humidity87%
Visibility4.2 mi
Dew point30°
Tue, 1342° / 25°0
42 °
Casto, Tuesday, 13 October
Mostly clear. High 42°, low 25°.
Pressure30.09 inHg
Wind2.7 mph NE
Humidity81%
Visibility6.2 mi
Dew point28°
Wed, 1446° / 23°0
46 °
Casto, Wednesday, 14 October
Clear. High 46°, low 23°.
Pressure30.18 inHg
Wind1.8 mph N
Humidity58%
Visibility6.2 mi
Dew point24°
Thu, 1551° / 26°0
51 °
Casto, Thursday, 15 October
Clear. High 51°, low 26°.
Pressure30.45 inHg
Wind4.6 mph S
Humidity52%
Visibility—
Dew point24°
Fri, 1657° / 24°0
57 °
Casto, Friday, 16 October
Clear. High 57°, low 24°.
Pressure30.39 inHg
Wind4.5 mph S
Humidity44%
Visibility—
Dew point24°
Sat, 1761° / 37°0
61 °
Casto, Saturday, 17 October
Clear. High 61°, low 37°.
Pressure30.21 inHg
Wind8.3 mph SW
Humidity19%
Visibility—
Dew point13°
Sun, 1861° / 40°0
61 °
Casto, Sunday, 18 October
Overcast. High 61°, low 40°.
Pressure30.06 inHg
Wind13.6 mph SW
Humidity29%
Visibility—
Dew point24°
Mon, 1954° / 36°0
54 °
Casto, Monday, 19 October
Overcast. High 54°, low 36°.
Pressure29.97 inHg
Wind16.1 mph W
Humidity22%
Visibility—
Dew point14°
Tue, 2046° / 31°0
46 °
Casto, Tuesday, 20 October
Overcast. High 46°, low 31°.
Pressure30.03 inHg
Wind9.4 mph W
Humidity29%
Visibility—
Dew point12°
Wed, 2151° / 27°0
51 °
Casto, Wednesday, 21 October
Clear. High 51°, low 27°.
Pressure30.09 inHg
Wind5.5 mph SW
Humidity14%
Visibility—
Dew point-2°
Thu, 2252° / 35°0.01
52 °
Casto, Thursday, 22 October
Light rain. High 52°, low 35°.
Pressure29.88 inHg
Wind15 mph SW
Humidity32%
Visibility—
Dew point21°
Fri, 2352° / 29°0
52 °
Casto, Friday, 23 October
Mostly clear. High 52°, low 29°.
Pressure30.21 inHg
Wind4.5 mph SW
Humidity43%
Visibility—
Dew point23°
Sat, 2454° / 33°0
54 °
Casto, Saturday, 24 October
Overcast. High 54°, low 33°.
Pressure30.27 inHg
Wind4.8 mph N
Humidity35%
Visibility—
Dew point21°
Sun, 2560° / 33°0
60 °
Casto, Sunday, 25 October
Clear. High 60°, low 33°.
Pressure30.30 inHg
Wind3.4 mph SE
Humidity24%
Visibility—
Dew point16°
Mon, 2660° / 36°0
60 °
Casto, Monday, 26 October
Clear. High 60°, low 36°.
Pressure30.12 inHg
Wind4.4 mph W
Humidity21%
Visibility—
Dew point15°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2748° / 28°0.04
48 °
Casto, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high48°
Average low28°
Average precipitation0.04 in
Chance of precipitation27%
Record high64° (2008)
Record low-8° (1970)
Wed, 2847° / 28°0.09
47 °
Casto, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.09 in
Chance of precipitation38%
Record high65° (1962)
Record low1° (1970)
Thu, 2946° / 27°0.06
46 °
Casto, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high46°
Average low27°
Average precipitation0.06 in
Chance of precipitation27%
Record high66° (1962)
Record low-8° (2019)
Fri, 3045° / 26°0.05
45 °
Casto, Friday, 30 October
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.05 in
Chance of precipitation28%
Record high65° (1962)
Record low-7° (2019)
Sat, 3145° / 27°0.05
45 °
Casto, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.05 in
Chance of precipitation30%
Record high62° (2012)
Record low4° (2002)
Sun, 0145° / 26°0.06
45 °
Casto, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.06 in
Chance of precipitation27%
Record high62° (2020)
Record low-6° (2004)
Mon, 0244° / 25°0.07
44 °
Casto, Monday, 2 November
Climate normal for this date — 60-year average.
Average high44°
Average low25°
Average precipitation0.07 in
Chance of precipitation35%
Record high64° (2020)
Record low-4° (1961)
Tue, 0345° / 25°0.05
45 °
Casto, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high45°
Average low25°
Average precipitation0.05 in
Chance of precipitation18%
Record high63° (2020)
Record low-9° (1994)
Wed, 0444° / 26°0.07
44 °
Casto, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.07 in
Chance of precipitation43%
Record high60° (1980)
Record low-3° (1973)
Thu, 0544° / 25°0.07
44 °
Casto, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high44°
Average low25°
Average precipitation0.07 in
Chance of precipitation38%
Record high63° (1980)
Record low-5° (1971)
Fri, 0643° / 25°0.09
43 °
Casto, Friday, 6 November
Climate normal for this date — 60-year average.
Average high43°
Average low25°
Average precipitation0.09 in
Chance of precipitation38%
Record high60° (2020)
Record low-8° (1971)
Sat, 0742° / 23°0.08
42 °
Casto, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high42°
Average low23°
Average precipitation0.08 in
Chance of precipitation38%
Record high58° (1976)
Record low0° (2017)
Sun, 0842° / 22°0.1
42 °
Casto, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high42°
Average low22°
Average precipitation0.1 in
Chance of precipitation40%
Record high60° (2016)
Record low-3° (1994)
Mon, 0941° / 22°0.08
41 °
Casto, Monday, 9 November
Climate normal for this date — 60-year average.
Average high41°
Average low22°
Average precipitation0.08 in
Chance of precipitation43%
Record high61° (2016)
Record low-6° (1960)
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 Casto, 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 Casto, 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.