September weather forecast and climate
Monroe, NY

September, the first month of the autumn, in Monroe, is still a warm month, with average temperature fluctuating between 54.9°F (12.7°C) and 74.1°F (23.4°C).

Temperature

In September, the average high-temperature slightly decreases, from 81.5°F (27.5°C) in August, to a still moderately hot 74.1°F (23.4°C). In Monroe, New York, the average low-temperature is 54.9°F (12.7°C).

Humidity

In Monroe, the average relative humidity is 78%.

Rainfall

In Monroe, in September, during 12.1 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, in Monroe, there are 141.2 rainfall days, and 25" (635mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Monroe.

Daylight

The average length of the day in Monroe is 12.5h.

Sunshine

The average sunshine in September is 8.8h.

UV index

In Monroe, New York, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Monroe?

In September, the average high-temperature is 74.1°F (23.4°C), and the average low-temperature is 54.9°F (12.7°C).

What is the average humidity in September in Monroe?

In September, the average relative humidity in Monroe is 78%.

How much does it rain in Monroe in September?

In Monroe, New York, in September, during 12.1 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

Does it snow in Monroe in September?

In Monroe, New York, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Monroe?

In Monroe, New York, snow does not fall in June through September.

What is the average length of the day in September in Monroe?

The average length of the day in September in Monroe is 12.5h.

How many hours of sunshine does Monroe have in September?

In Monroe, the average sunshine in September is 8.8h.

What is the UV index intensity in September in Monroe?

The average daily maximum UV index in September in Monroe, New York, is 4. A UV Index estimate of 3 to 5 represents a medium health risk from the exposure to the Sun's UV radiation.
Average temperature in September - Monroe, NY
  • Average high temperature in September: 23.4°C

The warmest month (with the highest average high temperature) is July (28.4°C).
The month with the lowest average high temperature is January (0.7°C).

  • Average low temperature in September: 12.7°C

The month with the highest average low temperature is July (17°C).
The coldest month (with the lowest average low temperature) is January (-6.3°C).

Average pressure in September - Monroe, NY
  • Average pressure in September: 1017.9mbar

The month with the highest atmospheric pressure is November (1019.4mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).

Average wind speed in September - Monroe, NY
  • Average wind speed in September: 8km/h

The windiest months (with the highest average wind speed) are January and March (11.5km/h).
The calmest month (with the lowest average wind speed) is August (7.4km/h).

Average humidity in September - Monroe, NY
  • Average humidity in September: 78%

Months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is April (74%).

Average rainfall in September - Monroe, NY
  • Average rainfall in September: 39mm

The wettest month (with the highest rainfall) is July (68mm).
The driest month (with the least rainfall) is January (37mm).

Average rainfall days in September - Monroe, NY
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (5.5 days).

Average snowfall in September - Monroe, NY
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (109mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September - Monroe, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (7.7 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Monroe, NY
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.5h).

Average sunshine days in September - Monroe, NY
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is January (21 days).
The month with the least sunshine days is June (11.8 days).

Average UV index in September - Monroe, NY
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September - Monroe, NY
  • Average cloud cover in September: 38

Months with the most cloud cover are February and March (Cloud cover 49).
Months with the least cloud cover are July and August (Cloud cover 34).

Average visibility in September - Monroe, NY
  • Average visibility in September: 8km

Months with the highest visibility are April, November and December (9km).
Months with the lowest visibility are January, February, March, May, June, July, August, September and October (8km).