Sullivan, NH Weather Forecast
Local 7-day forecast
Chance Rain And Snow Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Sullivan, NH in one place.
A chance of rain and snow showers. Cloudy, with a high near 43. South wind around 5 mph. Chance of precipitation is 30%. New snow accumulation of less than half an inch possible.
Local Weather Overview
This forecast page for Sullivan, 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: Apr 21, 2026 7:39 AM EDT.
The active forecast window currently covers Apr 22 to Apr 27, 2026 for Sullivan, NH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 22 to Apr 27, 2026
- Latest sync
- Apr 21, 2026 7:39 AM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sullivan
Monday looks like the warmest upcoming period in Sullivan at 58 degrees F.
Friday Night is the coolest period ahead with temperatures near 30 degrees F.
The strongest winds are forecast for Thursday at about 0 to 10 mph NW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 21, 2026 7:39 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- GYX
- Radar station
- KBOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of rain showers before 7pm. Mostly cloudy, with a low around 35. Southwest wind 0 to 5 mph.
Mostly sunny, with a high near 54.
Partly cloudy, with a low around 33.
Mostly sunny, with a high near 53.
Mostly clear, with a low around 30.
A slight chance of rain showers after 4pm. Mostly sunny, with a high near 55.
A slight chance of rain showers. Mostly cloudy, with a low around 35.
A slight chance of rain showers before 7am. Partly sunny, with a high near 55.
A slight chance of rain showers between 8pm and midnight. Mostly cloudy, with a low around 37.
Partly sunny, with a high near 58.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 22
|
Chance Rain And Snow Showers
|
43°F |
5 mph
S
|
|
Wednesday Night
Apr 22
|
Slight Chance Rain Showers then Mostly Cloudy
|
35°F |
0 to 5 mph
SW
|
|
Thursday
Apr 23
|
Mostly Sunny
|
54°F |
0 to 10 mph
NW
|
|
Thursday Night
Apr 23
|
Partly Cloudy
|
33°F |
5 to 10 mph
NW
|
|
Friday
Apr 24
|
Mostly Sunny
|
53°F |
5 mph
N
|
|
Friday Night
Apr 24
|
Mostly Clear
|
30°F |
0 to 5 mph
NE
|
|
Saturday
Apr 25
|
Mostly Sunny then Slight Chance Rain Showers
|
55°F |
0 to 5 mph
E
|
|
Saturday Night
Apr 25
|
Slight Chance Rain Showers
|
35°F |
0 to 5 mph
E
|
|
Sunday
Apr 26
|
Slight Chance Rain Showers then Partly Sunny
|
55°F |
0 to 5 mph
E
|
|
Sunday Night
Apr 26
|
Slight Chance Rain Showers then Mostly Cloudy
|
37°F |
0 to 5 mph
E
|
|
Monday
Apr 27
|
Partly Sunny
|
58°F |
0 to 5 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sullivan.