Monthly outlook for Castana, IA: average high 56.5°, average low 43.5°. That is 1.8° below the climate normal for October. Precipitation is expected on 3 days (about 1.1 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 20 October (68.3°), the coolest 30 October (30.9°).
56.5°/43.5°
Average high / low
−1.8°
Below normal
3 / 4
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
60.4°
61.1°
-0.4°
25 October – 3 November
49.9°
56.1°
-3.4°
4 November – 13 November
at normal
50.5°
—
October records over 66 years
90°1 October 2023All-time high
11.1°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Turin (5 mi).
Fri, 1651° / 40°0
51 °
Castana, Friday, 16 October
Mostly clear. High 51°, low 40°.
Pressure30.56 inHg
Wind18.4 mph N
Humidity55%
Visibility6.2 mi
Dew point32°
Sat, 1758° / 35°0
58 °
Castana, Saturday, 17 October
Clear. High 58°, low 35°.
Pressure30.47 inHg
Wind13 mph S
Humidity45%
Visibility6.2 mi
Dew point31°
Sun, 1863° / 43°0
63 °
Castana, Sunday, 18 October
Clear. High 63°, low 43°.
Pressure30.24 inHg
Wind13.6 mph S
Humidity55%
Visibility6.2 mi
Dew point40°
Mon, 1962° / 47°0
62 °
Castana, Monday, 19 October
Overcast. High 62°, low 47°.
Pressure30.21 inHg
Wind10.4 mph S
Humidity61%
Visibility—
Dew point45°
Tue, 2068° / 49°0
68 °
Castana, Tuesday, 20 October
Clear. High 68°, low 49°.
Pressure30.18 inHg
Wind11.3 mph SE
Humidity53%
Visibility—
Dew point46°
Wed, 2165° / 53°0.02
65 °
Castana, Wednesday, 21 October
Light rain. High 65°, low 53°.
Pressure30.18 inHg
Wind16.1 mph S
Humidity57%
Visibility—
Dew point47°
Thu, 2266° / 59°0.29
66 °
Castana, Thursday, 22 October
Rain. High 66°, low 59°.
Pressure30.00 inHg
Wind17 mph S
Humidity69%
Visibility—
Dew point54°
Fri, 2363° / 60°0.31
63 °
Castana, Friday, 23 October
Rain. High 63°, low 60°.
Pressure29.74 inHg
Wind31.1 mph S
Humidity61%
Visibility—
Dew point49°
Sat, 2454° / 45°0
54 °
Castana, Saturday, 24 October
Overcast. High 54°, low 45°.
Pressure30.12 inHg
Wind23.8 mph S
Humidity59%
Visibility—
Dew point37°
Sun, 2551° / 38°0
51 °
Castana, Sunday, 25 October
Clear. High 51°, low 38°.
Pressure30.30 inHg
Wind16.2 mph NW
Humidity38%
Visibility—
Dew point23°
Mon, 2647° / 36°0
47 °
Castana, Monday, 26 October
Overcast. High 47°, low 36°.
Pressure30.39 inHg
Wind7.3 mph NW
Humidity41%
Visibility—
Dew point23°
Tue, 2750° / 33°0
50 °
Castana, Tuesday, 27 October
Clear. High 50°, low 33°.
Pressure30.30 inHg
Wind8.3 mph W
Humidity46%
Visibility—
Dew point26°
Wed, 2855° / 40°0
55 °
Castana, Wednesday, 28 October
Overcast. High 55°, low 40°.
Pressure30.03 inHg
Wind9.7 mph S
Humidity52%
Visibility—
Dew point35°
Thu, 2956° / 41°0
56 °
Castana, Thursday, 29 October
Overcast. High 56°, low 41°.
Pressure30.12 inHg
Wind15.7 mph NE
Humidity61%
Visibility—
Dew point39°
Fri, 3041° / 31°0
41 °
Castana, Friday, 30 October
Clear. High 41°, low 31°.
Pressure30.68 inHg
Wind13.2 mph N
Humidity37%
Visibility—
Dew point13°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3155° / 38°0.09
55 °
Castana, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low38°
Average precipitation0.09 in
Chance of precipitation27%
Record high76° (1968)
Record low19° (1993)
Sun, 0154° / 39°0.09
54 °
Castana, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.09 in
Chance of precipitation27%
Record high77° (1990)
Record low20° (2002)
Mon, 0253° / 38°0.05
53 °
Castana, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.05 in
Chance of precipitation25%
Record high75° (2005)
Record low9° (1991)
Tue, 0354° / 37°0.06
54 °
Castana, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high54°
Average low37°
Average precipitation0.06 in
Chance of precipitation20%
Record high75° (2022)
Record low2° (1991)
Wed, 0453° / 36°0.02
53 °
Castana, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.02 in
Chance of precipitation8%
Record high70° (1978)
Record low-14° (1991)
Thu, 0553° / 37°0.04
53 °
Castana, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.04 in
Chance of precipitation15%
Record high73° (2008)
Record low17° (1991)
Fri, 0653° / 36°0.03
53 °
Castana, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.03 in
Chance of precipitation12%
Record high73° (1980)
Record low10° (1991)
Sat, 0753° / 36°0.02
53 °
Castana, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.02 in
Chance of precipitation10%
Record high74° (2001)
Record low-11° (1991)
Sun, 0852° / 36°0.05
52 °
Castana, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.05 in
Chance of precipitation18%
Record high78° (1999)
Record low-4° (1991)
Mon, 0951° / 35°0.14
51 °
Castana, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.14 in
Chance of precipitation28%
Record high74° (1999)
Record low16° (2018)
Tue, 1048° / 33°0.09
48 °
Castana, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.09 in
Chance of precipitation27%
Record high75° (2012)
Record low12° (2018)
Wed, 1147° / 30°0.07
47 °
Castana, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.07 in
Chance of precipitation17%
Record high69° (1964)
Record low6° (1986)
Thu, 1246° / 30°0.06
46 °
Castana, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.06 in
Chance of precipitation22%
Record high70° (2005)
Record low2° (2019)
Fri, 1348° / 31°0.06
48 °
Castana, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.06 in
Chance of precipitation23%
Record high74° (1999)
Record low4° (1986)
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 Castana, IA 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 Castana, IA 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.