Monthly outlook for Alton, NH: average high 56.2°, average low 42.1°. That is 1.9° above the climate normal for October. Precipitation is expected on 2 days (about 1.7 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 24 October (71.2°), the coolest 28 October (29.6°).
56.2°/42.1°
Average high / low
+1.9°
Above normal
2 / 5
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
56.4°
53.9°
+1.4°
23 October – 1 November
55.7°
50.1°
+3.1°
2 November – 11 November
at normal
46.5°
—
October records over 66 years
79.2°6 October 2025All-time high
24.3°24 October 1969All-time low
Climate normals and records are computed from the nearest reference point — Gilford (8 mi).
Wed, 1466° / 48°0.02
66 °
Alton, Wednesday, 14 October
Light rain. High 66°, low 48°.
Pressure29.77 inHg
Wind12 mph W
Humidity68%
Visibility6.2 mi
Dew point57°
Thu, 1556° / 49°0
56 °
Alton, Thursday, 15 October
Clear. High 56°, low 49°.
Pressure30.21 inHg
Wind9.7 mph NW
Humidity52%
Visibility6.2 mi
Dew point35°
Fri, 1652° / 48°1.07
52 °
Alton, Friday, 16 October
Rain. High 52°, low 48°.
Pressure29.65 inHg
Wind11.4 mph SE
Humidity96%
Visibility1.4 mi
Dew point46°
Sat, 1744° / 39°0.02
44 °
Alton, Saturday, 17 October
Light rain. High 44°, low 39°.
Pressure29.88 inHg
Wind19.7 mph NW
Humidity66%
Visibility—
Dew point33°
Sun, 1854° / 36°0
54 °
Alton, Sunday, 18 October
Mostly clear. High 54°, low 36°.
Pressure30.33 inHg
Wind12.1 mph W
Humidity57%
Visibility—
Dew point31°
Mon, 1951° / 39°0
51 °
Alton, Monday, 19 October
Overcast. High 51°, low 39°.
Pressure30.56 inHg
Wind7.7 mph S
Humidity63%
Visibility—
Dew point32°
Tue, 2065° / 42°0
65 °
Alton, Tuesday, 20 October
Overcast. High 65°, low 42°.
Pressure30.39 inHg
Wind6 mph W
Humidity53%
Visibility—
Dew point40°
Wed, 2164° / 44°0
64 °
Alton, Wednesday, 21 October
Clear. High 64°, low 44°.
Pressure30.36 inHg
Wind5.5 mph NW
Humidity64%
Visibility—
Dew point45°
Thu, 2256° / 41°0
56 °
Alton, Thursday, 22 October
Partly cloudy. High 56°, low 41°.
Pressure30.39 inHg
Wind5 mph SW
Humidity64%
Visibility—
Dew point40°
Fri, 2361° / 42°0
61 °
Alton, Friday, 23 October
Overcast. High 61°, low 42°.
Pressure30.30 inHg
Wind6.9 mph SW
Humidity87%
Visibility—
Dew point45°
Sat, 2471° / 54°0
71 °
Alton, Saturday, 24 October
Overcast. High 71°, low 54°.
Pressure29.83 inHg
Wind15.9 mph NW
Humidity66%
Visibility—
Dew point54°
Sun, 2557° / 44°0
57 °
Alton, Sunday, 25 October
Partly cloudy. High 57°, low 44°.
Pressure29.91 inHg
Wind11.5 mph NW
Humidity56%
Visibility—
Dew point39°
Mon, 2649° / 39°0
49 °
Alton, Monday, 26 October
Partly cloudy. High 49°, low 39°.
Pressure29.88 inHg
Wind13.8 mph NW
Humidity53%
Visibility—
Dew point31°
Tue, 2744° / 33°0
44 °
Alton, Tuesday, 27 October
Overcast. High 44°, low 33°.
Pressure30.03 inHg
Wind13.2 mph NW
Humidity48%
Visibility—
Dew point23°
Wed, 2851° / 30°0
51 °
Alton, Wednesday, 28 October
Overcast. High 51°, low 30°.
Pressure29.88 inHg
Wind4.7 mph SW
Humidity50%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2949° / 37°0.11
49 °
Alton, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.11 in
Chance of precipitation27%
Record high65° (1971)
Record low26° (1965)
Fri, 3048° / 37°0.15
48 °
Alton, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.15 in
Chance of precipitation25%
Record high64° (1989)
Record low28° (1962)
Sat, 3149° / 37°0.1
49 °
Alton, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.1 in
Chance of precipitation23%
Record high71° (2024)
Record low27° (1988)
Sun, 0149° / 38°0.11
49 °
Alton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.11 in
Chance of precipitation27%
Record high67° (2024)
Record low27° (1965)
Mon, 0249° / 38°0.13
49 °
Alton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.13 in
Chance of precipitation35%
Record high61° (2001)
Record low22° (2002)
Tue, 0348° / 37°0.22
48 °
Alton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.22 in
Chance of precipitation40%
Record high63° (1982)
Record low21° (2002)
Wed, 0448° / 37°0.09
48 °
Alton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.09 in
Chance of precipitation23%
Record high64° (1994)
Record low27° (1965)
Thu, 0547° / 37°0.15
47 °
Alton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.15 in
Chance of precipitation35%
Record high69° (2022)
Record low24° (1965)
Fri, 0647° / 37°0.13
47 °
Alton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.13 in
Chance of precipitation37%
Record high71° (2024)
Record low26° (1987)
Sat, 0746° / 36°0.06
46 °
Alton, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high46°
Average low36°
Average precipitation0.06 in
Chance of precipitation25%
Record high66° (2020)
Record low19° (2002)
Sun, 0845° / 34°0.09
45 °
Alton, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high45°
Average low34°
Average precipitation0.09 in
Chance of precipitation30%
Record high66° (2020)
Record low20° (2002)
Mon, 0945° / 34°0.1
45 °
Alton, Monday, 9 November
Climate normal for this date — 60-year average.
Average high45°
Average low34°
Average precipitation0.1 in
Chance of precipitation30%
Record high65° (2020)
Record low19° (1971)
Tue, 1045° / 35°0.16
45 °
Alton, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high45°
Average low35°
Average precipitation0.16 in
Chance of precipitation37%
Record high67° (2020)
Record low20° (2017)
Wed, 1144° / 34°0.14
44 °
Alton, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low34°
Average precipitation0.14 in
Chance of precipitation45%
Record high68° (2020)
Record low19° (2017)
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 Alton, 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 Alton, 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.