Monthly outlook for New Castle, IN: average high 58.9°, average low 41.3°. That is 0.1° below the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 25 October (69.3°), the coolest 29 October (27.8°).
58.9°/41.3°
Average high / low
−0.1°
Below normal
3 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
64.2°
59.8°
+2.5°
29 October – 7 November
49.9°
56.4°
-3.6°
8 November – 17 November
at normal
51°
—
October records over 66 years
89.1°2 October 2019All-time high
22.5°26 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Milton (15 mi).
Tue, 2069° / 39°0
69 °
New Castle, Tuesday, 20 October
Clear. High 69°, low 39°.
Pressure30.39 inHg
Wind4.7 mph E
Humidity46%
Visibility6.2 mi
Dew point42°
Wed, 2167° / 41°0
67 °
New Castle, Wednesday, 21 October
Clear. High 67°, low 41°.
Pressure30.30 inHg
Wind1.6 mph NW
Humidity54%
Visibility6.2 mi
Dew point46°
Thu, 2264° / 45°0
64 °
New Castle, Thursday, 22 October
Clear. High 64°, low 45°.
Pressure30.30 inHg
Wind6.1 mph N
Humidity66%
Visibility6.2 mi
Dew point49°
Fri, 2361° / 42°0
61 °
New Castle, Friday, 23 October
Clear. High 61°, low 42°.
Pressure30.39 inHg
Wind6.5 mph E
Humidity63%
Visibility6.2 mi
Dew point42°
Sat, 2461° / 40°0
61 °
New Castle, Saturday, 24 October
Overcast. High 61°, low 40°.
Pressure30.45 inHg
Wind7.1 mph SE
Humidity40%
Visibility—
Dew point33°
Sun, 2569° / 47°0
69 °
New Castle, Sunday, 25 October
Overcast. High 69°, low 47°.
Pressure30.33 inHg
Wind11.7 mph SW
Humidity40%
Visibility—
Dew point40°
Mon, 2667° / 53°0
67 °
New Castle, Monday, 26 October
Overcast. High 67°, low 53°.
Pressure30.27 inHg
Wind7.6 mph S
Humidity43%
Visibility—
Dew point42°
Tue, 2768° / 54°0
68 °
New Castle, Tuesday, 27 October
Overcast. High 68°, low 54°.
Pressure30.00 inHg
Wind16.6 mph SW
Humidity41%
Visibility—
Dew point42°
Wed, 2847° / 33°0.23
47 °
New Castle, Wednesday, 28 October
Snow. High 47°, low 33°.
Pressure30.21 inHg
Wind18.9 mph NW
Humidity41%
Visibility—
Dew point20°
Thu, 2948° / 28°0
48 °
New Castle, Thursday, 29 October
Clear. High 48°, low 28°.
Pressure30.27 inHg
Wind11.4 mph W
Humidity28%
Visibility—
Dew point13°
Fri, 3050° / 33°0
50 °
New Castle, Friday, 30 October
Overcast. High 50°, low 33°.
Pressure30.09 inHg
Wind13.9 mph SW
Humidity26%
Visibility—
Dew point14°
Sat, 3149° / 45°0.13
49 °
New Castle, Saturday, 31 October
Light rain. High 49°, low 45°.
Pressure30.18 inHg
Wind11.1 mph SW
Humidity82%
Visibility—
Dew point41°
Sun, 0155° / 45°0.17
55 °
New Castle, Sunday, 1 November
Light rain. High 55°, low 45°.
Pressure29.94 inHg
Wind10 mph W
Humidity91%
Visibility—
Dew point50°
Mon, 0249° / 39°0.03
49 °
New Castle, Monday, 2 November
Light rain. High 49°, low 39°.
Pressure29.97 inHg
Wind19.2 mph NW
Humidity83%
Visibility—
Dew point37°
Tue, 0348° / 41°0
48 °
New Castle, Tuesday, 3 November
Overcast. High 48°, low 41°.
Pressure29.94 inHg
Wind12.3 mph NW
Humidity61%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0455° / 41°0.07
55 °
New Castle, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.07 in
Chance of precipitation30%
Record high74° (2003)
Record low16° (1966)
Thu, 0555° / 41°0.09
55 °
New Castle, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.09 in
Chance of precipitation25%
Record high76° (2024)
Record low18° (1991)
Fri, 0654° / 39°0.09
54 °
New Castle, Friday, 6 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.09 in
Chance of precipitation33%
Record high74° (1975)
Record low25° (1967)
Sat, 0753° / 38°0.13
53 °
New Castle, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.13 in
Chance of precipitation33%
Record high69° (2020)
Record low21° (1971)
Sun, 0854° / 38°0.04
54 °
New Castle, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.04 in
Chance of precipitation23%
Record high75° (2023)
Record low20° (1991)
Mon, 0955° / 39°0.11
55 °
New Castle, Monday, 9 November
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.11 in
Chance of precipitation35%
Record high74° (2020)
Record low19° (1991)
Tue, 1053° / 38°0.15
53 °
New Castle, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.15 in
Chance of precipitation35%
Record high74° (2020)
Record low18° (2018)
Wed, 1151° / 36°0.13
51 °
New Castle, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.13 in
Chance of precipitation35%
Record high70° (2010)
Record low20° (2025)
Thu, 1249° / 34°0.09
49 °
New Castle, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.09 in
Chance of precipitation28%
Record high69° (1964)
Record low15° (2019)
Fri, 1349° / 34°0.08
49 °
New Castle, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.08 in
Chance of precipitation27%
Record high69° (2010)
Record low8° (2019)
Sat, 1450° / 35°0.12
50 °
New Castle, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.12 in
Chance of precipitation33%
Record high71° (2011)
Record low15° (1986)
Sun, 1549° / 36°0.13
49 °
New Castle, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.13 in
Chance of precipitation37%
Record high70° (1964)
Record low20° (2014)
Mon, 1650° / 35°0.1
50 °
New Castle, Monday, 16 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.1 in
Chance of precipitation25%
Record high67° (2001)
Record low22° (1967)
Tue, 1750° / 35°0.13
50 °
New Castle, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.13 in
Chance of precipitation27%
Record high69° (1971)
Record low11° (1997)
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 New Castle, IN 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 New Castle, IN 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.