Harriman State Park, NY

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Island Pond, in Harriman State Park
Island Pond, in Harriman State Park. Image by Mwanner via Wikimedia Commons, CC BY-SA 3.0.

Today’s Forecast:

☁
70°F
High: 70° | Low: 53°
Current Temperature
Partly Cloudy
Station: KSWF
Observed at: 1:45 pm CDT on 9/25/26
Wind: 11 mph | Humidity: 49%
This Afternoon:Mostly cloudy. High near 66, with temperatures falling to around 64 in the afternoon. North wind around 13 mph, with gusts as high as 28 mph.
Tonight:A chance of rain after 8pm. Cloudy, with a low around 53. Northeast wind 13 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Saturday:Rain. Mostly cloudy. High near 58, with temperatures falling to around 56 in the afternoon. North wind around 17 mph, with gusts as high as 38 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
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Today’s Report:

🥾 Hiking

Excellent
  100 /100

Excellent for hiking. High near 64°F. Low rain risk (1%). Light wind (14 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 20/100
Not Recommended for hiking. High near 57°F. High rain probability (78%). Light wind (17 mph).

⛺ Camping

Excellent
  100 /100

Excellent for camping. High near 64°F. Low rain risk (1%). Light wind (14 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 19/100
Not Recommended for camping. High near 57°F. High rain probability (78%). Breezy winds (17 mph).

🚲 Biking

Excellent
  100 /100

Excellent for biking. High near 64°F. Low rain risk (1%). Light wind (14 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 16/100
Not Recommended for biking. High near 57°F. High rain probability (78%). Breezy winds (17 mph).

About Harriman State Park

Harriman State Park is a New York destination for a large network of lakes, trails, campgrounds, scenic roads, and winter routes.

Make the Most of a Harriman State Park Day

Match the route, launch, facility, or turnaround time to precipitation, wind, temperature, visibility, water conditions, snow or ice, and seasonal access. Keep a shorter or more sheltered alternative ready.

Weather Tips for Harriman State Park

  • Check official access notices, alerts, trail or road conditions, and local forecasts before leaving.
  • Turn around before exposed ridges, cliffs, overlooks, or open ground become unsafe in thunder, high wind, ice, or poor visibility.
  • Bring layers, water, navigation, sun protection, and traction or flotation appropriate to the season and activity.
  • Allow extra time for traffic, limited winter daylight, lake-effect snow, freeze-thaw mud, and seasonal facility schedules.

Nearby Towns and Areas

This page can also be useful when planning outdoor time near:

  • Lake Welch
  • Seven Lakes Drive
  • Tiorati
  • Sloatsburg
  • Ramapo
  • Pine Meadow Lake

Plan Around the Conditions

Choose the safest version of a Harriman State Park day by matching the activity to current wind, precipitation, temperature, visibility, water or snow conditions, access, and daylight.

7-Day Forecast for Harriman State Park

☁
70°F
High: 70° | Low: 53°
Current Temperature
Partly Cloudy
Station: KSWF
Observed at: 1:45 pm CDT on 9/25/26
Wind: 11 mph | Humidity: 49%
Fri ☁
66° 53°
1%
Sat 🌧
58° 53°
78%
Sun 🌧
60° 56°
96%
Mon 🌧
61° 55°
82%
Tue ⛅
68° 55°
6%
Wed ⛅
71° 56°
1%
Thu ⛅
72° 57°
4%

7-Day High Temperature Trend

66° Fri 58° Sat 60° Sun 61° Mon 68° Tue 71° Wed 72° Thu

7-Day Low Temperature Trend

53° Fri 53° Sat 56° Sun 55° Mon 55° Tue 56° Wed 57° Thu

📊 7-Day Outdoor Outlook

Good Fair Poor 100 Fri 93 Sat 93 Sun 93 Mon 100 Tue 100 Wed 100 Thu
Forecast data from the National Weather Service  |  Last Updated: September 25, 2026 4:16 pm CDT

Harriman State Park Weather by Season

Winter

Winter at Harriman State Park brings cold, shorter daylight, and periodic snow or ice. Snow and ice can support the listed winter activities, but conditions and access must be confirmed locally.

Spring

Spring is changeable, with rain, mud, snowmelt, rising water, and lingering ice in shaded or elevated terrain. Lower routes and developed facilities generally become usable before exposed, backcountry, or high-elevation areas.

Summer

Summer usually provides the broadest access, but heat, humidity, thunderstorms, crowds, and occasional wildfire smoke can alter plans. Start exposed outings early and keep a weather-safe turnaround point.

Fall

Fall brings cooler air, foliage crowds, shorter daylight, and increasing wind. Early snow or ice can reach northern and elevated areas while lower valleys and coastal destinations remain milder.

Key Climate Data Points

  • Annual average temperature: around 48–52°F, using the relevant local and elevation context.
  • Annual snowfall: commonly 25–50 inches, with more on higher ridges.
  • Warmest months: July and August are normally warmest.
  • Coolest months: January is typically coolest, with February similarly cold in northern and elevated areas.
  • Wettest season: precipitation is distributed through the year, with late spring through summer often wettest from rain and thunderstorms.
  • Driest season: no season is reliably dry statewide; early fall often provides the most stable outdoor windows.
  • Best outdoor window: June through October for warm-season access, with midwinter best only where established winter recreation is supported.