Monthly outlook for New Castle, NH: average high 56.3°, average low 42.1°. That is 0.4° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 16 October (66.7°), the coolest 18 October (32.5°).
56.3°/42.1°
Average high / low
+0.4°
Above normal
3 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
55.4°
56.6°
-0.7°
26 October – 4 November
57.8°
53.5°
+2.3°
5 November – 14 November
at normal
49.6°
—
October records over 66 years
82.2°3 October 2023All-time high
29.5°24 October 1969All-time low
Sat, 1752° / 33°0
52 °
New Castle, Saturday, 17 October
Overcast. High 52°, low 33°.
Pressure30.09 inHg
Wind14 mph NW
Humidity48%
Visibility6.2 mi
Dew point29°
Sun, 1853° / 33°0
53 °
New Castle, Sunday, 18 October
Clear. High 53°, low 33°.
Pressure30.59 inHg
Wind2.5 mph S
Humidity45%
Visibility6.2 mi
Dew point26°
Mon, 1954° / 38°0
54 °
New Castle, Monday, 19 October
Overcast. High 54°, low 38°.
Pressure30.50 inHg
Wind3.4 mph E
Humidity59%
Visibility3.8 mi
Dew point40°
Tue, 2063° / 40°0
63 °
New Castle, Tuesday, 20 October
Overcast. High 63°, low 40°.
Pressure30.21 inHg
Wind7.7 mph NE
Humidity59%
Visibility—
Dew point40°
Wed, 2154° / 44°0
54 °
New Castle, Wednesday, 21 October
Clear. High 54°, low 44°.
Pressure30.42 inHg
Wind10.4 mph NE
Humidity52%
Visibility—
Dew point34°
Thu, 2249° / 44°0
49 °
New Castle, Thursday, 22 October
Overcast. High 49°, low 44°.
Pressure30.42 inHg
Wind11.3 mph NE
Humidity68%
Visibility—
Dew point38°
Fri, 2359° / 43°0
59 °
New Castle, Friday, 23 October
Clear. High 59°, low 43°.
Pressure30.03 inHg
Wind8 mph N
Humidity55%
Visibility—
Dew point37°
Sat, 2452° / 38°0
52 °
New Castle, Saturday, 24 October
Clear. High 52°, low 38°.
Pressure30.30 inHg
Wind10.3 mph N
Humidity52%
Visibility—
Dew point29°
Sun, 2550° / 42°0
50 °
New Castle, Sunday, 25 October
Clear. High 50°, low 42°.
Pressure30.53 inHg
Wind8.9 mph NE
Humidity67%
Visibility—
Dew point38°
Mon, 2656° / 43°0
56 °
New Castle, Monday, 26 October
Overcast. High 56°, low 43°.
Pressure30.39 inHg
Wind5.8 mph SE
Humidity70%
Visibility—
Dew point40°
Tue, 2754° / 45°0
54 °
New Castle, Tuesday, 27 October
Overcast. High 54°, low 45°.
Pressure30.33 inHg
Wind11.3 mph NE
Humidity69%
Visibility—
Dew point42°
Wed, 2854° / 45°0
54 °
New Castle, Wednesday, 28 October
Overcast. High 54°, low 45°.
Pressure30.30 inHg
Wind9.1 mph S
Humidity76%
Visibility—
Dew point44°
Thu, 2961° / 50°0.08
61 °
New Castle, Thursday, 29 October
Light rain. High 61°, low 50°.
Pressure30.18 inHg
Wind7.2 mph SW
Humidity79%
Visibility—
Dew point50°
Fri, 3059° / 46°0.01
59 °
New Castle, Friday, 30 October
Light rain. High 59°, low 46°.
Pressure30.21 inHg
Wind12.3 mph SW
Humidity68%
Visibility—
Dew point42°
Sat, 3164° / 47°0.15
64 °
New Castle, Saturday, 31 October
Light rain. High 64°, low 47°.
Pressure29.97 inHg
Wind19.2 mph NE
Humidity73%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0155° / 44°0.11
55 °
New Castle, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.11 in
Chance of precipitation30%
Record high74° (2024)
Record low33° (2023)
Mon, 0254° / 43°0.14
54 °
New Castle, Monday, 2 November
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.14 in
Chance of precipitation28%
Record high66° (1971)
Record low28° (2002)
Tue, 0353° / 42°0.22
53 °
New Castle, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.22 in
Chance of precipitation37%
Record high70° (2017)
Record low28° (2002)
Wed, 0452° / 42°0.08
52 °
New Castle, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.08 in
Chance of precipitation20%
Record high68° (1987)
Record low31° (2002)
Thu, 0553° / 42°0.19
53 °
New Castle, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.19 in
Chance of precipitation38%
Record high73° (2022)
Record low29° (1965)
Fri, 0652° / 43°0.13
52 °
New Castle, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low43°
Average precipitation0.13 in
Chance of precipitation37%
Record high77° (2024)
Record low31° (1987)
Sat, 0751° / 41°0.05
51 °
New Castle, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.05 in
Chance of precipitation22%
Record high71° (2022)
Record low27° (2002)
Sun, 0850° / 40°0.1
50 °
New Castle, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.1 in
Chance of precipitation30%
Record high62° (1996)
Record low27° (2002)
Mon, 0950° / 40°0.13
50 °
New Castle, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.13 in
Chance of precipitation32%
Record high64° (1975)
Record low25° (1971)
Tue, 1050° / 40°0.16
50 °
New Castle, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.16 in
Chance of precipitation35%
Record high68° (2020)
Record low24° (2017)
Wed, 1149° / 40°0.13
49 °
New Castle, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.13 in
Chance of precipitation47%
Record high71° (2020)
Record low24° (2017)
Thu, 1248° / 38°0.13
48 °
New Castle, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low38°
Average precipitation0.13 in
Chance of precipitation38%
Record high71° (2022)
Record low25° (2019)
Fri, 1347° / 37°0.17
47 °
New Castle, Friday, 13 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.17 in
Chance of precipitation42%
Record high65° (1964)
Record low17° (2019)
Sat, 1447° / 37°0.12
47 °
New Castle, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.12 in
Chance of precipitation30%
Record high63° (1973)
Record low19° (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 New Castle, NH 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, NH 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.