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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.

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%

Catskill Mountains Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Catskill Mountains - and find the best time to visit.

January

0°C (32°F)View January → February

0°C (32°F)View February → March

6°C (43°F)View March → April

13°C (55°F)View April → May

20°C (68°F)View May → June

23°C (73°F)View June → July

26°C (79°F)View July → August

25°C (77°F)View August → September

22°C (72°F)View September → This monthOctober

15°C (59°F)View October → November

8°C (46°F)View November → December

3°C (37°F)View December →

Best Time to Visit Catskill Mountains →

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 records 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 2026, 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 →

Conditions Temperatures Precipitation

Temperatures Precipitation

perfect weather

pleasant

tolerable

unpleasant

poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

Marker color shows total monthly precipitation in September: pale blue is dry, deep blue is wet.

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.