Monthly outlook for New Castle, NH: average high 55.6°, average low 38.2°. That is 0.6° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 5 days and 2.3 inches. The warmest day looks like 26 October (65.4°), the coolest 29 October (32.9°).
55.6°/38.2°
Average high / low
+0.6°
Above normal
1 / 5
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
58.9°
55.4°
+1.9°
30 October – 8 November
50.2°
52.4°
-1.2°
9 November – 18 November
at normal
47.8°
—
October records over 66 years
82.2°3 October 2023All-time high
29.5°24 October 1969All-time low
Wed, 2157° / 36°0
57 °
New Castle, Wednesday, 21 October
Clear. High 57°, low 36°.
Pressure30.27 inHg
Wind10 mph NE
Humidity58%
Visibility6.2 mi
Dew point38°
Thu, 2264° / 39°0
64 °
New Castle, Thursday, 22 October
Overcast. High 64°, low 39°.
Pressure29.85 inHg
Wind9.2 mph N
Humidity36%
Visibility6.2 mi
Dew point34°
Fri, 2351° / 38°0
51 °
New Castle, Friday, 23 October
Clear. High 51°, low 38°.
Pressure30.21 inHg
Wind11.3 mph NW
Humidity49%
Visibility6.2 mi
Dew point27°
Sat, 2456° / 34°0
56 °
New Castle, Saturday, 24 October
Clear. High 56°, low 34°.
Pressure30.47 inHg
Wind4 mph NW
Humidity54%
Visibility—
Dew point31°
Sun, 2563° / 36°0
63 °
New Castle, Sunday, 25 October
Clear. High 63°, low 36°.
Pressure30.47 inHg
Wind6.4 mph SW
Humidity48%
Visibility—
Dew point34°
Mon, 2665° / 44°0
65 °
New Castle, Monday, 26 October
Overcast. High 65°, low 44°.
Pressure30.24 inHg
Wind7.6 mph W
Humidity53%
Visibility—
Dew point41°
Tue, 2765° / 51°0
65 °
New Castle, Tuesday, 27 October
Overcast. High 65°, low 51°.
Pressure30.00 inHg
Wind12.8 mph SW
Humidity64%
Visibility—
Dew point47°
Wed, 2854° / 35°0.02
54 °
New Castle, Wednesday, 28 October
Light rain. High 54°, low 35°.
Pressure30.06 inHg
Wind19.3 mph NW
Humidity45%
Visibility—
Dew point24°
Thu, 2950° / 33°0
50 °
New Castle, Thursday, 29 October
Clear. High 50°, low 33°.
Pressure30.24 inHg
Wind12.9 mph SW
Humidity49%
Visibility—
Dew point26°
Fri, 3056° / 42°0.06
56 °
New Castle, Friday, 30 October
Light rain. High 56°, low 42°.
Pressure30.00 inHg
Wind16 mph W
Humidity60%
Visibility—
Dew point39°
Sat, 3146° / 37°0
46 °
New Castle, Saturday, 31 October
Clear. High 46°, low 37°.
Pressure29.97 inHg
Wind20.1 mph NW
Humidity48%
Visibility—
Dew point23°
Sun, 0152° / 38°0
52 °
New Castle, Sunday, 1 November
Overcast. High 52°, low 38°.
Pressure30.03 inHg
Wind15 mph SW
Humidity50%
Visibility—
Dew point30°
Mon, 0251° / 38°0.01
51 °
New Castle, Monday, 2 November
Light rain. High 51°, low 38°.
Pressure30.15 inHg
Wind16.6 mph NW
Humidity61%
Visibility—
Dew point35°
Tue, 0347° / 34°0
47 °
New Castle, Tuesday, 3 November
Clear. High 47°, low 34°.
Pressure30.62 inHg
Wind10.2 mph SE
Humidity51%
Visibility—
Dew point26°
Wed, 0450° / 39°0
50 °
New Castle, Wednesday, 4 November
Overcast. High 50°, low 39°.
Pressure30.65 inHg
Wind9.1 mph SE
Humidity66%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sun, 1548° / 37°0.13
48 °
New Castle, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.13 in
Chance of precipitation37%
Record high65° (1993)
Record low21° (2018)
Mon, 1647° / 37°0.16
47 °
New Castle, Monday, 16 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.16 in
Chance of precipitation37%
Record high62° (2001)
Record low22° (1967)
Tue, 1746° / 36°0.15
46 °
New Castle, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high46°
Average low36°
Average precipitation0.15 in
Chance of precipitation30%
Record high62° (2023)
Record low22° (1967)
Wed, 1846° / 36°0.08
46 °
New Castle, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high46°
Average low36°
Average precipitation0.08 in
Chance of precipitation25%
Record high64° (1987)
Record low26° (2020)
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.