Monthly outlook for Castle Rocks, ID: average high 56.6°, average low 38.4°. That is 2.8° above the climate normal for October. Precipitation is expected on 5 days (about 2.0 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 20 October (66.1°), the coolest 24 October (26.7°).
56.6°/38.4°
Average high / low
+2.8°
Above normal
5 / 4
Wet days / normal
2.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
58.4°
53.7°
+2.6°
29 October – 7 November
53.6°
47.7°
+3.3°
8 November – 17 November
at normal
42.6°
—
October records over 66 years
84.9°2 October 2010All-time high
-1.3°27 October 1970All-time low
Tue, 2066° / 35°0
66 °
Castle Rocks, Tuesday, 20 October
Overcast. High 66°, low 35°.
Pressure30.00 inHg
Wind9.2 mph E
Humidity44%
Visibility6.2 mi
Dew point41°
Wed, 2165° / 35°0
65 °
Castle Rocks, Wednesday, 21 October
Mostly clear. High 65°, low 35°.
Pressure30.00 inHg
Wind10.3 mph E
Humidity49%
Visibility6.2 mi
Dew point43°
Thu, 2260° / 44°0.51
60 °
Castle Rocks, Thursday, 22 October
Rain. High 60°, low 44°.
Pressure29.85 inHg
Wind5.3 mph E
Humidity67%
Visibility6.2 mi
Dew point47°
Fri, 2346° / 35°0.7
46 °
Castle Rocks, Friday, 23 October
Rain. High 46°, low 35°.
Pressure30.00 inHg
Wind10.6 mph W
Humidity89%
Visibility5.7 mi
Dew point37°
Sat, 2448° / 27°0
48 °
Castle Rocks, Saturday, 24 October
Partly cloudy. High 48°, low 27°.
Pressure30.21 inHg
Wind6.1 mph SE
Humidity63%
Visibility—
Dew point28°
Sun, 2556° / 31°0
56 °
Castle Rocks, Sunday, 25 October
Partly cloudy. High 56°, low 31°.
Pressure30.30 inHg
Wind4.9 mph S
Humidity35%
Visibility—
Dew point21°
Mon, 2659° / 40°0
59 °
Castle Rocks, Monday, 26 October
Mostly clear. High 59°, low 40°.
Pressure30.18 inHg
Wind5.7 mph NE
Humidity18%
Visibility—
Dew point11°
Tue, 2759° / 42°0
59 °
Castle Rocks, Tuesday, 27 October
Overcast. High 59°, low 42°.
Pressure30.18 inHg
Wind5.2 mph NE
Humidity23%
Visibility—
Dew point16°
Wed, 2861° / 43°0
61 °
Castle Rocks, Wednesday, 28 October
Overcast. High 61°, low 43°.
Pressure30.09 inHg
Wind7.2 mph NE
Humidity23%
Visibility—
Dew point17°
Thu, 2961° / 44°0
61 °
Castle Rocks, Thursday, 29 October
Overcast. High 61°, low 44°.
Pressure30.00 inHg
Wind6.7 mph NE
Humidity23%
Visibility—
Dew point18°
Fri, 3061° / 44°0
61 °
Castle Rocks, Friday, 30 October
Overcast. High 61°, low 44°.
Pressure30.00 inHg
Wind6.5 mph S
Humidity24%
Visibility—
Dew point21°
Sat, 3149° / 43°0.23
49 °
Castle Rocks, Saturday, 31 October
Light rain. High 49°, low 43°.
Pressure30.09 inHg
Wind7.8 mph W
Humidity88%
Visibility—
Dew point41°
Sun, 0152° / 38°0
52 °
Castle Rocks, Sunday, 1 November
Overcast. High 52°, low 38°.
Pressure30.18 inHg
Wind6 mph NE
Humidity59%
Visibility—
Dew point34°
Mon, 0255° / 44°0.33
55 °
Castle Rocks, Monday, 2 November
Rain. High 55°, low 44°.
Pressure29.88 inHg
Wind8.1 mph NE
Humidity59%
Visibility—
Dew point37°
Tue, 0344° / 39°0.2
44 °
Castle Rocks, Tuesday, 3 November
Light rain. High 44°, low 39°.
Pressure29.85 inHg
Wind10.8 mph SW
Humidity80%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0448° / 31°0.06
48 °
Castle Rocks, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.06 in
Chance of precipitation27%
Record high64° (1980)
Record low15° (1961)
Thu, 0547° / 31°0.06
47 °
Castle Rocks, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.06 in
Chance of precipitation25%
Record high67° (1980)
Record low4° (1961)
Fri, 0647° / 31°0.08
47 °
Castle Rocks, Friday, 6 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.08 in
Chance of precipitation33%
Record high65° (1999)
Record low11° (1961)
Sat, 0746° / 31°0.08
46 °
Castle Rocks, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.08 in
Chance of precipitation33%
Record high65° (1999)
Record low18° (2017)
Sun, 0845° / 29°0.07
45 °
Castle Rocks, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.07 in
Chance of precipitation37%
Record high61° (2016)
Record low2° (1994)
Mon, 0944° / 28°0.09
44 °
Castle Rocks, Monday, 9 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.09 in
Chance of precipitation35%
Record high62° (2016)
Record low13° (1998)
Tue, 1044° / 28°0.07
44 °
Castle Rocks, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.07 in
Chance of precipitation28%
Record high63° (2016)
Record low9° (2022)
Wed, 1143° / 28°0.06
43 °
Castle Rocks, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.06 in
Chance of precipitation33%
Record high62° (2016)
Record low7° (2022)
Thu, 1243° / 27°0.07
43 °
Castle Rocks, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.07 in
Chance of precipitation28%
Record high64° (1999)
Record low6° (1982)
Fri, 1343° / 27°0.08
43 °
Castle Rocks, Friday, 13 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.08 in
Chance of precipitation32%
Record high63° (1999)
Record low2° (2000)
Sat, 1442° / 26°0.06
42 °
Castle Rocks, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.06 in
Chance of precipitation27%
Record high64° (1999)
Record low-7° (1964)
Sun, 1542° / 25°0.05
42 °
Castle Rocks, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high42°
Average low25°
Average precipitation0.05 in
Chance of precipitation20%
Record high59° (1999)
Record low-6° (1964)
Mon, 1642° / 26°0.07
42 °
Castle Rocks, Monday, 16 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.07 in
Chance of precipitation33%
Record high60° (1999)
Record low-8° (2014)
Tue, 1740° / 26°0.09
40 °
Castle Rocks, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.09 in
Chance of precipitation38%
Record high58° (2008)
Record low-2° (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 Castle Rocks, 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 Castle Rocks, 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.