Monthly outlook for New Castle, NH: average high 54.5°, average low 39.5°. That is 0.8° below the climate normal for October. Precipitation is expected on 1 day (about 0.6 inches), against a normal of 5 days and 2.3 inches. The warmest day looks like 16 October (64.8°), the coolest 18 October (34.1°).
54.5°/39.5°
Average high / low
−0.8°
Below normal
1 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
56.3°
57°
-0.4°
25 October – 3 November
51.4°
53.9°
-1.3°
4 November – 13 November
at normal
50.2°
—
October records over 66 years
82.2°3 October 2023All-time high
29.5°24 October 1969All-time low
Fri, 1665° / 43°0.54
65 °
New Castle, Friday, 16 October
Rain. High 65°, low 43°.
Pressure29.83 inHg
Wind10 mph SE
Humidity97%
Visibility3.0 mi
Dew point53°
Sat, 1763° / 38°0
63 °
New Castle, Saturday, 17 October
Partly cloudy. High 63°, low 38°.
Pressure30.00 inHg
Wind14.2 mph NW
Humidity49%
Visibility6.2 mi
Dew point30°
Sun, 1850° / 34°0
50 °
New Castle, Sunday, 18 October
Clear. High 50°, low 34°.
Pressure30.59 inHg
Wind1.7 mph W
Humidity50%
Visibility6.2 mi
Dew point23°
Mon, 1955° / 37°0
55 °
New Castle, Monday, 19 October
Clear. High 55°, low 37°.
Pressure30.53 inHg
Wind5.7 mph S
Humidity51%
Visibility—
Dew point33°
Tue, 2060° / 39°0
60 °
New Castle, Tuesday, 20 October
Overcast. High 60°, low 39°.
Pressure30.24 inHg
Wind9.5 mph N
Humidity68%
Visibility—
Dew point40°
Wed, 2155° / 46°0
55 °
New Castle, Wednesday, 21 October
Clear. High 55°, low 46°.
Pressure30.33 inHg
Wind16.9 mph NE
Humidity58%
Visibility—
Dew point37°
Thu, 2249° / 40°0
49 °
New Castle, Thursday, 22 October
Clear. High 49°, low 40°.
Pressure30.42 inHg
Wind10.8 mph N
Humidity61%
Visibility—
Dew point33°
Fri, 2360° / 41°0
60 °
New Castle, Friday, 23 October
Partly cloudy. High 60°, low 41°.
Pressure30.18 inHg
Wind16.3 mph NW
Humidity56%
Visibility—
Dew point39°
Sat, 2448° / 39°0
48 °
New Castle, Saturday, 24 October
Clear. High 48°, low 39°.
Pressure30.53 inHg
Wind14.8 mph NE
Humidity56%
Visibility—
Dew point31°
Sun, 2545° / 35°0
45 °
New Castle, Sunday, 25 October
Mostly clear. High 45°, low 35°.
Pressure30.56 inHg
Wind10.8 mph N
Humidity57%
Visibility—
Dew point28°
Mon, 2652° / 37°0
52 °
New Castle, Monday, 26 October
Overcast. High 52°, low 37°.
Pressure30.18 inHg
Wind8.5 mph SW
Humidity53%
Visibility—
Dew point29°
Tue, 2755° / 41°0
55 °
New Castle, Tuesday, 27 October
Overcast. High 55°, low 41°.
Pressure30.00 inHg
Wind14.7 mph W
Humidity48%
Visibility—
Dew point32°
Wed, 2852° / 39°0.01
52 °
New Castle, Wednesday, 28 October
Light rain. High 52°, low 39°.
Pressure30.00 inHg
Wind15.3 mph W
Humidity49%
Visibility—
Dew point29°
Thu, 2952° / 36°0
52 °
New Castle, Thursday, 29 October
Overcast. High 52°, low 36°.
Pressure30.06 inHg
Wind14.6 mph SW
Humidity55%
Visibility—
Dew point30°
Fri, 3052° / 41°0.01
52 °
New Castle, Friday, 30 October
Light rain. High 52°, low 41°.
Pressure29.85 inHg
Wind18.7 mph NW
Humidity57%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3153° / 42°0.11
53 °
New Castle, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.11 in
Chance of precipitation25%
Record high76° (2024)
Record low31° (2020)
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)
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.