Sullivan, NH Weather Forecast
Local 7-day forecast
Areas Of Fog then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sullivan, NH in one place.
Areas of fog before 7am. Mostly sunny, with a high near 80. Southeast wind 0 to 5 mph.
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: Jul 25, 2026 11:54 PM EDT.
The active forecast window currently covers Jul 26 to Aug 1, 2026 for Sullivan, NH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 26 to Aug 1, 2026
- Latest sync
- Jul 25, 2026 11:54 PM EDT
- Forecast office
- GYX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sullivan
Monday looks like the warmest upcoming period in Sullivan at 81 degrees F.
Sunday Night is the coolest period ahead with temperatures near 52 degrees F.
The strongest winds are forecast for Wednesday at about 5 to 10 mph E.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 25, 2026 11:54 PM EDT
- Coverage
- 7 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
Mostly clear, with a low around 52. East wind 0 to 5 mph.
A slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 81. East wind 0 to 5 mph.
A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 57. South wind 0 to 5 mph.
Rain showers likely before 2pm, then showers and thunderstorms. Mostly cloudy, with a high near 76. Chance of precipitation is 80%.
Showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 80%.
Showers and thunderstorms. Mostly cloudy, with a high near 71. Chance of precipitation is 80%.
Showers and thunderstorms. Mostly cloudy, with a low around 56. Chance of precipitation is 80%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then showers and thunderstorms likely. Partly sunny, with a high near 75. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 57. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms between 2pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms between 7pm and 8pm. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 81.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Jul 26
|
Areas Of Fog then Mostly Sunny
|
80°F |
0 to 5 mph
SE
|
|
Sunday Night
Jul 26
|
Mostly Clear
|
52°F |
0 to 5 mph
E
|
|
Monday
Jul 27
|
Sunny then Slight Chance Showers And Thunderstorms
|
81°F |
0 to 5 mph
E
|
|
Monday Night
Jul 27
|
Slight Chance Showers And Thunderstorms
|
57°F |
0 to 5 mph
S
|
|
Tuesday
Jul 28
|
Showers And Thunderstorms
|
76°F |
0 to 5 mph
S
|
|
Tuesday Night
Jul 28
|
Showers And Thunderstorms
|
57°F |
5 mph
SE
|
|
Wednesday
Jul 29
|
Showers And Thunderstorms
|
71°F |
5 to 10 mph
E
|
|
Wednesday Night
Jul 29
|
Showers And Thunderstorms
|
56°F |
5 mph
NE
|
|
Thursday
Jul 30
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
75°F |
5 mph
N
|
|
Thursday Night
Jul 30
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
57°F |
0 to 5 mph
NW
|
|
Friday
Jul 31
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
78°F |
0 to 5 mph
NW
|
|
Friday Night
Jul 31
|
Chance Showers And Thunderstorms then Partly Cloudy
|
58°F |
0 mph
|
|
Saturday
Aug 1
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
81°F |
0 to 5 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sullivan.