September weather forecast
New Windsor, MD

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Weather in September

The first month of the autumn, September, is still a warm month in New Windsor, Maryland, with an average temperature fluctuating between 75°F (23.9°C) and 57°F (13.9°C).

Temperature

A mild drop in New Windsor's average high-temperature is observed in September, transitioning from 81.7°F (27.6°C) in August to a still warm 75°F (23.9°C). New Windsor, during the nights of September, experiences an average temperature drop to a refreshing 57°F (13.9°C).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In September, the rain falls for 13.8 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. Throughout the year, there are 158.9 rainfall days, and 32.68" (830mm) of precipitation is accumulated.

Snowfall

In New Windsor, snow does not fall in May through September.

Daylight

In New Windsor, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:37 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm EDT.

Sunshine

In New Windsor, the average sunshine in September is 8.7h.

UV index

In New Windsor, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.

Frequently asked questions

What is the average September temperature?

New Windsor in September has an average high-temperature of 75°F (23.9°C) and an average low-temperature of 57°F (13.9°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in August is computed to be 87.8°F (31°C).

What is the average humidity in September?

The average relative humidity in September is 79%.

How much does it rain in September?

In New Windsor, in September, it is raining for 13.8 days, with typically 2.44" (62mm) of accumulated precipitation.

When it does not snow?

May through September are months without snowfall in New Windsor.

Does it snow in September?

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

How many hours of daylight does New Windsor have in September?

In New Windsor, the average day length in September is 12h and 26min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:37 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm EDT.

How long on average sun shines in September in New Windsor?

In September, the average sunshine duration in New Windsor, Maryland, is 8.7h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
New Windsor, MD

Average temperature in September - New Windsor, MD
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in September: 57°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

Average pressure in September
New Windsor, MD

Average pressure in September - New Windsor, MD
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
New Windsor, MD

Average wind speed in September - New Windsor, MD
  • Average wind speed in September: 5.9mph

The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in September
New Windsor, MD

Average humidity in September - New Windsor, MD
  • Average humidity in September: 79%

The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are January, April, July and November (76%).

Average rainfall in September
New Windsor, MD

Average rainfall in September - New Windsor, MD
  • Average rainfall in September: 2.44"

The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is February (2.13").

Average rainfall days in September
New Windsor, MD

Average rainfall days in September - New Windsor, MD
  • Average rainfall days in September: 13.8 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.4 days).

Average snowfall in September
New Windsor, MD

Average snowfall in September - New Windsor, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is March (4.06").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
New Windsor, MD

Average snowfall days in September - New Windsor, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
New Windsor, MD

Average daylight in September / Average sunshine in September - New Windsor, MD
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

Average sunshine days in September
New Windsor, MD

Average sunshine days in September - New Windsor, MD
  • Average sunshine days in September: 14.8 days

The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is July (11.6 days).

Average UV index in September
New Windsor, MD

Average UV index in September - New Windsor, MD
  • Average UV index in September: 4

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

Average cloud cover in September
New Windsor, MD

Average cloud cover in September - New Windsor, MD
  • Average cloud cover in September: 39

The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
New Windsor, MD

Average visibility in September - New Windsor, MD
  • Average visibility in September: 5mi

The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).

New Windsor, Maryland, USA

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