September weather forecast
Bellefonte, DE

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Weather in September

September brings a refreshing coolness in the air in Bellefonte. The temperature begins to decline from the peaks of summer, with the highest falling to 76.3°F (24.6°C). The reducing daylight hours and infrequent rainfall herald the onset of fall. It is a picturesque sight to witness the leaves beginning to shed their green hue. September signifies a time of flux as the lush summer fades into the welcoming arms of fall.

Temperature

With the beginning of September, the average high-temperature shows a small decrease, transitioning from a moderately hot 82.9°F (28.3°C) in August to a still warm 76.3°F (24.6°C). During the month of September, Bellefonte anticipates a mean low-temperature of 59.9°F (15.5°C).

Humidity

In Bellefonte, the average relative humidity in September is 77%.

Rainfall

In Bellefonte, Delaware, during September, the rain falls for 13.3 days and regularly aggregates up to 2.4" (61mm) of precipitation. In Bellefonte, Delaware, during the entire year, the rain falls for 168.9 days and collects up to 35.55" (903mm) of precipitation.

Snowfall

June through September are months without snowfall in Bellefonte.

Daylight

In September, the average length of the day in Bellefonte, Delaware, is 12h and 26min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:32 pm. On the last day of September, in Bellefonte, sunrise is at 6:57 am and sunset at 6:45 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, an average UV index of 4 transforms into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
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Frequently asked questions

What are September temperatures in Bellefonte?

In September, in Bellefonte, the average high-temperature is 76.3°F (24.6°C), and the average low-temperature is 59.9°F (15.5°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 89.6°F (32°C).

What is the average humidity in September in Bellefonte?

In Bellefonte, Delaware, the average relative humidity in September is 77%.

How many days does it rain in September in Bellefonte?

In Bellefonte, in September, during 13.3 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

When it does not snow in Bellefonte?

June through September are months without snowfall in Bellefonte, Delaware.

Does it snow in Bellefonte in September?

In Bellefonte, Delaware, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Bellefonte have in September?

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

What time are sunrise and sunset in September in Bellefonte?

In September, on the first day of the month, sunrise is at 6:30 am and sunset at 7:32 pm. On the last day of the month, in Bellefonte, Delaware, sunrise is at 6:57 am and sunset at 6:45 pm EDT.

How long on average sun shines in September in Bellefonte?

In September, the average sunshine duration in Bellefonte, Delaware, is 8.8h.

What is the UV index intensity in September in Bellefonte?

In September, the average daily maximum UV index in Bellefonte is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASeptemberOND
Aug
September
Oct
Average high temperature
82.9°F 28.3°C
76.3°F 24.6°C
64.6°F 18.1°C
Average low temperature
66.7°F 19.3°C
59.9°F 15.5°C
50.2°F 10.1°C
Average pressure
29.99" 762mmHg
30.05" 763mmHg
30.03" 763mmHg
Average wind speed
5.4mph 8.7km/h
5.8mph 9.3km/h
7.2mph 11.6km/h
Average max. wind speed
5.9mph 9.5km/h
6.1mph 9.8km/h
7.8mph 12.6km/h
Average wind speed gusts
8.3mph 13.4km/h
9.1mph 14.6km/h
11.7mph 18.8km/h
Average humidity
74%
77%
78%
Average rainfall
4.09" 104mm
2.4" 61mm
2.72" 69mm
Average rainfall days
17.3
13.3
12.7
Average snowfall
0" 0mm
0" 0mm
0.04" 1mm
Average snowfall days
0
0
0.1
Average daylight
13h 4min
12h 2min
11h 1min
Average sunshine
10h 1min
8h 5min
5h 4min
Average sunshine days
11
14.2
15.5
Average UV index
6
4
3
Average cloud cover
33%
37%
41%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in September
Bellefonte, DE

Average temperature in September - Bellefonte, DE
  • Average high temperature in September: 76.3°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

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Average pressure in September
Bellefonte, DE

Average pressure in September - Bellefonte, DE
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Bellefonte, DE

Average wind speed in September - Bellefonte, DE
  • Average wind speed in September: 5.8mph

The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in September
Bellefonte, DE

Average humidity in September - Bellefonte, DE
  • Average humidity in September: 77%

The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Bellefonte, DE

Average rainfall in September - Bellefonte, DE
  • Average rainfall in September: 2.4"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (2.36").

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Average rainfall days in September
Bellefonte, DE

Average rainfall days in September - Bellefonte, DE
  • Average rainfall days in September: 13.3 days

The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (8.8 days).

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Average snowfall in September
Bellefonte, DE

Average snowfall in September - Bellefonte, DE
  • Average snowfall in September: 0"

The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Bellefonte, DE

Average snowfall days in September - Bellefonte, DE
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Bellefonte, DE

Average daylight in September / Average sunshine in September - Bellefonte, DE
  • 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in September
Bellefonte, DE

Average sunshine days in September - Bellefonte, DE
  • Average sunshine days in September: 14.2 days

The month with the most sunshine days is November (18.6 days).
The months with the least sunshine days are May and July (9.8 days).

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Average UV index in September
Bellefonte, DE

Average UV index in September - Bellefonte, DE
  • 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).

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Average cloud cover in September
Bellefonte, DE

Average cloud cover in September - Bellefonte, DE
  • Average cloud cover in September: 37

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in September
Bellefonte, DE

Average visibility in September - Bellefonte, DE
  • Average visibility in September: 6mi

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

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Bellefonte, Delaware, USA

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