September weather forecastNew Castle, IN
September
Weather in September
September in New Castle brings a welcomed change with temperatures retracting to highs of 74.3°F (23.5°C) and dropping to 56.8°F (13.8°C) during nights. The city says its goodbyes to summer as the leaves begin to change color. With temperate weather and the arrival of autumn radiance, the city flickers in shades of red, orange, and gold. September speaks volumes of beauty in transition. It's truly a magical time in New Castle.Temperature
New Castle experiences an average high-temperature of a still moderately hot 74.3°F (23.5°C) with the onset of September, subtly varied from August's 79.3°F (26.3°C). New Castle, in September, witnesses an average low-temperature of 56.8°F (13.8°C).Humidity
In New Castle, the average relative humidity in September is 79%.Rainfall
In September, in New Castle, the rain falls for 15.2 days. Throughout September, 2.09" (53mm) of precipitation is accumulated. Throughout the year, in New Castle, there are 169.4 rainfall days, and 31.77" (807mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in New Castle.Daylight
The average length of the day in September in New Castle is 12h and 26min.On the first day of September, sunrise is at 7:10 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:24 pm EDT.
Sunshine
In New Castle, the average sunshine in September is 8.1h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Adopt protective measures - Suggestions to resist sunburn are offered. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in September /
Average sunshine in September
New Castle, IN
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- 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).
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).
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).
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).
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).
