Monthly outlook for Casto, ID: average high 53°, average low 29.8°. That is 0.4° below the climate normal for October. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 9 October (66.7°), the coolest 16 October (20.6°).
53°/29.8°
Average high / low
−0.4°
Below normal
4 / 4
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
50°
54.5°
-2.5°
18 October – 27 October
57.9°
50.9°
+3.9°
28 October – 6 November
at normal
44.7°
—
October records over 66 years
82.2°2 October 2010All-time high
-8.5°27 October 1970All-time low
Fri, 0967° / 32°0
67 °
Casto, Friday, 9 October
Clear. High 67°, low 32°.
Pressure29.71 inHg
Wind9.1 mph SW
Humidity27%
Visibility6.2 mi
Dew point28°
Sat, 1047° / 29°0.06
47 °
Casto, Saturday, 10 October
Light rain. High 47°, low 29°.
Pressure29.53 inHg
Wind6.8 mph SW
Humidity44%
Visibility6.2 mi
Dew point31°
Sun, 1140° / 29°0.48
40 °
Casto, Sunday, 11 October
Snow. High 40°, low 29°.
Pressure29.62 inHg
Wind2.1 mph N
Humidity72%
Visibility4.0 mi
Dew point35°
Mon, 1239° / 28°0.07
39 °
Casto, Monday, 12 October
Light snow. High 39°, low 28°.
Pressure29.88 inHg
Wind2.3 mph N
Humidity78%
Visibility6.2 mi
Dew point32°
Tue, 1345° / 22°0
45 °
Casto, Tuesday, 13 October
Partly cloudy. High 45°, low 22°.
Pressure30.00 inHg
Wind4.2 mph N
Humidity66%
Visibility—
Dew point25°
Wed, 1448° / 26°0
48 °
Casto, Wednesday, 14 October
Mostly clear. High 48°, low 26°.
Pressure30.03 inHg
Wind8.2 mph W
Humidity54%
Visibility—
Dew point24°
Thu, 1540° / 25°0.11
40 °
Casto, Thursday, 15 October
Snow. High 40°, low 25°.
Pressure30.18 inHg
Wind11.3 mph NE
Humidity75%
Visibility—
Dew point29°
Fri, 1651° / 21°0
51 °
Casto, Friday, 16 October
Clear. High 51°, low 21°.
Pressure30.42 inHg
Wind3.6 mph NE
Humidity28%
Visibility—
Dew point10°
Sat, 1757° / 30°0
57 °
Casto, Saturday, 17 October
Overcast. High 57°, low 30°.
Pressure30.24 inHg
Wind4.4 mph S
Humidity17%
Visibility—
Dew point6°
Sun, 1859° / 34°0
59 °
Casto, Sunday, 18 October
Mostly clear. High 59°, low 34°.
Pressure30.18 inHg
Wind2.8 mph W
Humidity22%
Visibility—
Dew point14°
Mon, 1958° / 34°0
58 °
Casto, Monday, 19 October
Clear. High 58°, low 34°.
Pressure30.09 inHg
Wind7.2 mph W
Humidity19%
Visibility—
Dew point10°
Tue, 2057° / 34°0
57 °
Casto, Tuesday, 20 October
Partly cloudy. High 57°, low 34°.
Pressure30.06 inHg
Wind8 mph W
Humidity19%
Visibility—
Dew point9°
Wed, 2155° / 34°0
55 °
Casto, Wednesday, 21 October
Clear. High 55°, low 34°.
Pressure30.12 inHg
Wind4.7 mph NW
Humidity26%
Visibility—
Dew point15°
Thu, 2259° / 34°0
59 °
Casto, Thursday, 22 October
Clear. High 59°, low 34°.
Pressure30.21 inHg
Wind5.2 mph SW
Humidity21%
Visibility—
Dew point13°
Fri, 2359° / 36°0
59 °
Casto, Friday, 23 October
Clear. High 59°, low 36°.
Pressure30.06 inHg
Wind11.8 mph W
Humidity22%
Visibility—
Dew point15°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2450° / 30°0.05
50 °
Casto, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high50°
Average low30°
Average precipitation0.05 in
Chance of precipitation22%
Record high66° (2005)
Record low9° (2004)
Sun, 2549° / 30°0.08
49 °
Casto, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.08 in
Chance of precipitation33%
Record high65° (1988)
Record low-3° (2004)
Mon, 2648° / 31°0.07
48 °
Casto, Monday, 26 October
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.07 in
Chance of precipitation35%
Record high63° (1999)
Record low11° (2020)
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)
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.