Monthly outlook for New Castle, IN: average high 61.5°, average low 41.9°. That is 1.5° above the climate normal for October. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 21 October (69.9°), the coolest 30 October (31.2°).
61.5°/41.9°
Average high / low
+1.5°
Above normal
4 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
64.9°
59.6°
+3°
30 October – 8 November
55.8°
56°
-0.1°
9 November – 18 November
at normal
50.6°
—
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).
Wed, 2170° / 40°0
70 °
New Castle, Wednesday, 21 October
Clear. High 70°, low 40°.
Pressure30.27 inHg
Wind1.9 mph W
Humidity48%
Visibility6.2 mi
Dew point44°
Thu, 2267° / 42°0
67 °
New Castle, Thursday, 22 October
Clear. High 67°, low 42°.
Pressure30.27 inHg
Wind6.2 mph NE
Humidity50%
Visibility6.2 mi
Dew point44°
Fri, 2366° / 47°0
66 °
New Castle, Friday, 23 October
Partly cloudy. High 66°, low 47°.
Pressure30.39 inHg
Wind5.3 mph E
Humidity68%
Visibility6.2 mi
Dew point51°
Sat, 2465° / 46°0
65 °
New Castle, Saturday, 24 October
Clear. High 65°, low 46°.
Pressure30.45 inHg
Wind5.1 mph SE
Humidity60%
Visibility6.2 mi
Dew point46°
Sun, 2569° / 48°0
69 °
New Castle, Sunday, 25 October
Overcast. High 69°, low 48°.
Pressure30.39 inHg
Wind6.3 mph SE
Humidity45%
Visibility—
Dew point44°
Mon, 2669° / 50°0
69 °
New Castle, Monday, 26 October
Overcast. High 69°, low 50°.
Pressure30.21 inHg
Wind9.4 mph SW
Humidity45%
Visibility—
Dew point44°
Tue, 2768° / 54°0
68 °
New Castle, Tuesday, 27 October
Overcast. High 68°, low 54°.
Pressure30.18 inHg
Wind9.6 mph E
Humidity45%
Visibility—
Dew point43°
Wed, 2856° / 38°0.27
56 °
New Castle, Wednesday, 28 October
Rain. High 56°, low 38°.
Pressure30.06 inHg
Wind17 mph W
Humidity88%
Visibility—
Dew point47°
Thu, 2950° / 36°0.04
50 °
New Castle, Thursday, 29 October
Light rain. High 50°, low 36°.
Pressure30.18 inHg
Wind20.4 mph W
Humidity40%
Visibility—
Dew point24°
Fri, 3048° / 31°0
48 °
New Castle, Friday, 30 October
Clear. High 48°, low 31°.
Pressure30.30 inHg
Wind8.4 mph SE
Humidity40%
Visibility—
Dew point21°
Sat, 3156° / 33°0
56 °
New Castle, Saturday, 31 October
Overcast. High 56°, low 33°.
Pressure30.12 inHg
Wind16.8 mph S
Humidity43%
Visibility—
Dew point29°
Sun, 0160° / 51°0.08
60 °
New Castle, Sunday, 1 November
Light rain. High 60°, low 51°.
Pressure30.00 inHg
Wind18.2 mph S
Humidity89%
Visibility—
Dew point54°
Mon, 0267° / 44°0.2
67 °
New Castle, Monday, 2 November
Light rain. High 67°, low 44°.
Pressure29.94 inHg
Wind20.2 mph W
Humidity70%
Visibility—
Dew point56°
Tue, 0350° / 36°0
50 °
New Castle, Tuesday, 3 November
Clear. High 50°, low 36°.
Pressure30.47 inHg
Wind9 mph N
Humidity36%
Visibility—
Dew point23°
Wed, 0453° / 36°0
53 °
New Castle, Wednesday, 4 November
Overcast. High 53°, low 36°.
Pressure30.33 inHg
Wind11.1 mph SW
Humidity36%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Wed, 1850° / 36°0.12
50 °
New Castle, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.12 in
Chance of precipitation22%
Record high71° (2016)
Record low8° (2014)
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.