Catskill Mountains Weather in September
September in Catskill Mountains typically sees daytime highs of 22°C (72°F) and nighttime lows of 8°C (46°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Catskill Mountains in September
Looking at the last 30 years, the data shows about 11 days with rain, averaging 117 mm (4.6 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Catskill Mountains in September
In September, expect pleasant temperatures in Catskill Mountains, with highs of 22°C (72°F) and lows of 8°C (46°F) at night. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows around 8°C (46°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.If you prefer enjoying temperate temperatures and rain-free days, May typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Catskill Mountains's climate page.
Catskill Mountains Temperature in September
Min Temperature
8°C (46°F)
Max Temperature
22°C (72°F)
Chance of Rain
37%
Precipitation
117 mm (4.6 in)
Rainy days
11 days
Humidity
71%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Catskill Mountains typically drop from around 25°C (77°F) at the start of September to approximately 20°C (68°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 14°C (57°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Catskill Mountains in September
Browse day-by-day weather records for Catskill Mountains spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Catskill Mountains historical weather extremes in September
Based on weather observations in Catskill Mountains between 1976 and 2025, these are the recorded extremes during September.
- Catskill Mountains recorded its highest September temperature of 34°C (93°F) on September 6, 1983.
- The lowest daytime temperature in September was 11°C (52°F), recorded on September 30, 1992.
- Catskill Mountains registered its coldest September night on September 29, 2000, with temperatures dropping to -1°C (30°F).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
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tolerable
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What to Wear in Catskill Mountains in September
For Catskill Mountains in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.What To Do in Catskill Mountains in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Catskill Mountains's climate page.
See the full Catskill Mountains climate overview or explore weather in the United States of America.
