September weather forecast
New Castle, IN

Weather in September

The first month of the autumn, September, is still a warm month in New Castle, Indiana, with an average temperature fluctuating between 74.3°F (23.5°C) and 56.8°F (13.8°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still moderately hot 74.3°F (23.5°C). The average low-temperature, in September, is 56.8°F (13.8°C).

Humidity

The average relative humidity in September in New Castle is 79%.

Rainfall

In New Castle, it is raining for 15.2 days, with typically 2.09" (53mm) of accumulated precipitation. In New Castle, during the entire year, the rain falls for 169.4 days and collects up to 31.77" (807mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 7:09 am and sunset at 8:13 pm. On the last day of September, in New Castle, sunrise is at 7:36 am and sunset at 7:25 pm EDT.

Sunshine

In New Castle, the average sunshine in September is 8.1h.

UV index

In September, the average daily maximum UV index in New Castle is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. 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.
[Resources]

FAQ

What is the average humidity in September in New Castle?

In New Castle, the average relative humidity in September is 79%.

How much does it rain in New Castle in September?

In New Castle, in September, it is raining for 15.2 days, with typically 2.09" (53mm) of accumulated precipitation.

When it does not snow in New Castle?

May through September are months without snowfall.

Does it snow in New Castle in September?

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

What is the average length of the day in September in New Castle?

The average day length in September is 12h and 26min.

What time are sunrise and sunset in September in New Castle?

On the first day of September in New Castle, sunrise is at 7:09 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 7:25 pm EDT.

How many hours of sunshine does New Castle have in September?

In New Castle, the average sunshine duration in September is 8.1h.

How high is the UV index in September in New Castle?

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

Average temperature in September
New Castle, IN

Average temperature in September - New Castle, IN
  • Average high temperature in September: 74.3°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (32.2°F).

  • Average low temperature in September: 56.8°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

[Resources]

Average pressure in September
New Castle, IN

Average pressure in September - New Castle, IN
  • Average pressure in September: 30.03"Hg

The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

[Resources]

Average wind speed in September
New Castle, IN

Average wind speed in September - New Castle, IN
  • Average wind speed in September: 6.7mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

[Resources]

Average humidity in September
New Castle, IN

Average humidity in September - New Castle, IN
  • Average humidity in September: 79%

The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).

[Resources]

Average rainfall in September
New Castle, IN

Average rainfall in September - New Castle, IN
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is February (1.85").

[Resources]

Average rainfall days in September
New Castle, IN

Average rainfall days in September - New Castle, IN
  • Average rainfall days in September: 15.2 days

The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is February (8.8 days).

[Resources]

Average snowfall in September
New Castle, IN

Average snowfall in September - New Castle, IN
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in September
New Castle, IN

Average snowfall days in September - New Castle, IN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
New Castle, IN

Average daylight in September / Average sunshine in September - New Castle, IN
  • Average daylight in September: 12h and 26min

The month with the longest days is June (Average daylight: 14h and 58min).
The month with the shortest days is December (Average daylight: 9h and 23min).

  • Average sunshine in September: 8h and 6min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

[Resources]

Average sunshine days in September
New Castle, IN

Average sunshine days in September - New Castle, IN
  • Average sunshine days in September: 12.4 days

The months with the most sunshine days are October and November (16.1 days).
The month with the least sunshine days is May (9.1 days).

[Resources]

Average UV index in September
New Castle, IN

Average UV index in September - New Castle, IN
  • Average UV index in September: 4

The months with the highest UV index are May, June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

[Resources]

Average cloud cover in September
New Castle, IN

Average cloud cover in September - New Castle, IN
  • Average cloud cover in September: 35

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).

[Resources]

Average visibility in September
New Castle, IN

Average visibility in September - New Castle, IN
  • Average visibility in September: 5mi

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

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location