Monthly outlook for Castle Rocks, ID: average high 56.8°, average low 40.1°. That is 3.6° above the climate normal for October. Precipitation is expected on 2 days (about 1.4 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 21 October (64.1°), the coolest 26 October (32.1°).
56.8°/40.1°
Average high / low
+3.6°
Above normal
2 / 4
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
56.2°
52°
+2.3°
31 October – 9 November
57.9°
46.7°
+6.2°
10 November – 19 November
at normal
41.7°
—
October records over 66 years
84.9°2 October 2010All-time high
-1.3°27 October 1970All-time low
Thu, 2260° / 37°0.33
60 °
Castle Rocks, Thursday, 22 October
Rain. High 60°, low 37°.
Pressure29.83 inHg
Wind14 mph E
Humidity49%
Visibility6.2 mi
Dew point44°
Fri, 2344° / 36°1.05
44 °
Castle Rocks, Friday, 23 October
Heavy rain. High 44°, low 36°.
Pressure29.94 inHg
Wind7 mph W
Humidity97%
Visibility5.9 mi
Dew point39°
Sat, 2451° / 34°0
51 °
Castle Rocks, Saturday, 24 October
Clear. High 51°, low 34°.
Pressure30.24 inHg
Wind2.2 mph S
Humidity72%
Visibility6.2 mi
Dew point37°
Sun, 2553° / 32°0
53 °
Castle Rocks, Sunday, 25 October
Clear. High 53°, low 32°.
Pressure30.15 inHg
Wind2.6 mph SW
Humidity64%
Visibility1.8 mi
Dew point38°
Mon, 2656° / 32°0
56 °
Castle Rocks, Monday, 26 October
Overcast. High 56°, low 32°.
Pressure30.27 inHg
Wind6.2 mph SE
Humidity68%
Visibility—
Dew point37°
Tue, 2757° / 37°0
57 °
Castle Rocks, Tuesday, 27 October
Overcast. High 57°, low 37°.
Pressure30.12 inHg
Wind4.5 mph SW
Humidity38%
Visibility—
Dew point25°
Wed, 2859° / 42°0
59 °
Castle Rocks, Wednesday, 28 October
Overcast. High 59°, low 42°.
Pressure30.09 inHg
Wind8.1 mph SE
Humidity26%
Visibility—
Dew point20°
Thu, 2959° / 45°0
59 °
Castle Rocks, Thursday, 29 October
Partly cloudy. High 59°, low 45°.
Pressure30.00 inHg
Wind6 mph SW
Humidity30%
Visibility—
Dew point24°
Fri, 3059° / 42°0
59 °
Castle Rocks, Friday, 30 October
Overcast. High 59°, low 42°.
Pressure29.88 inHg
Wind5.3 mph SW
Humidity33%
Visibility—
Dew point25°
Sat, 3158° / 46°0
58 °
Castle Rocks, Saturday, 31 October
Overcast. High 58°, low 46°.
Pressure29.71 inHg
Wind6.8 mph SE
Humidity37%
Visibility—
Dew point27°
Sun, 0158° / 42°0
58 °
Castle Rocks, Sunday, 1 November
Clear. High 58°, low 42°.
Pressure29.88 inHg
Wind6.1 mph SW
Humidity35%
Visibility—
Dew point26°
Mon, 0259° / 42°0
59 °
Castle Rocks, Monday, 2 November
Clear. High 59°, low 42°.
Pressure30.00 inHg
Wind6.9 mph SE
Humidity35%
Visibility—
Dew point27°
Tue, 0355° / 45°0
55 °
Castle Rocks, Tuesday, 3 November
Overcast. High 55°, low 45°.
Pressure30.15 inHg
Wind5.7 mph NE
Humidity51%
Visibility—
Dew point35°
Wed, 0457° / 45°0
57 °
Castle Rocks, Wednesday, 4 November
Overcast. High 57°, low 45°.
Pressure30.09 inHg
Wind6.6 mph NE
Humidity49%
Visibility—
Dew point34°
Thu, 0560° / 45°0
60 °
Castle Rocks, Thursday, 5 November
Overcast. High 60°, low 45°.
Pressure30.06 inHg
Wind9.1 mph NE
Humidity38%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Wed, 1840° / 24°0.08
40 °
Castle Rocks, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.08 in
Chance of precipitation28%
Record high58° (2008)
Record low0° (2014)
Thu, 1939° / 23°0.07
39 °
Castle Rocks, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high39°
Average low23°
Average precipitation0.07 in
Chance of precipitation32%
Record high53° (1989)
Record low0° (1985)
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.