Alton, NH Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Alton, NH in one place.
Sunny, with a high near 52. Southwest wind 0 to 5 mph.
Local Weather Overview
This forecast page for Alton, NH is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 17, 2026 4:39 PM EDT.
The active forecast window currently covers Oct 18 to Oct 23, 2026 for Alton, NH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 18 to Oct 23, 2026
- Latest sync
- Oct 17, 2026 4:39 PM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Alton
Tuesday looks like the warmest upcoming period in Alton at 59 degrees F.
Sunday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 10 mph N.
The forecast from Oct 18 through Oct 23 stays mostly dry.
Forecast Details
- Last updated
- Oct 17, 2026 4:39 PM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- GYX
- Radar station
- KGYX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Clear, with a low around 31. South wind 0 to 5 mph.
Sunny, with a high near 57. South wind 0 to 5 mph.
Partly cloudy, with a low around 37.
Mostly sunny, with a high near 59.
Partly cloudy, with a low around 36.
Sunny, with a high near 53.
Partly cloudy, with a low around 34.
Mostly sunny, with a high near 55.
Partly cloudy, with a low around 39.
Mostly sunny, with a high near 54.
Partly cloudy, with a low around 37.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Oct 18
|
Sunny
|
52°F |
0 to 5 mph
SW
|
|
Sunday Night
Oct 18
|
Clear
|
31°F |
0 to 5 mph
S
|
|
Monday
Oct 19
|
Sunny
|
57°F |
0 to 5 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
37°F |
0 to 5 mph
NE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
59°F |
5 to 10 mph
N
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
36°F |
5 to 10 mph
NE
|
|
Wednesday
Oct 21
|
Sunny
|
53°F |
5 to 10 mph
NE
|
|
Wednesday Night
Oct 21
|
Partly Cloudy
|
34°F |
0 to 5 mph
NE
|
|
Thursday
Oct 22
|
Mostly Sunny
|
55°F |
0 to 5 mph
N
|
|
Thursday Night
Oct 22
|
Partly Cloudy
|
39°F |
0 to 5 mph
N
|
|
Friday
Oct 23
|
Mostly Sunny
|
54°F |
10 mph
N
|
|
Friday Night
Oct 23
|
Partly Cloudy
|
37°F |
5 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Alton.
