September weather forecast
Townsend, DE

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Weather in September

September in Townsend signifies the much-anticipated transition from summer to autumn. Typically, cooler temperatures start to seep in with the changing of the colors, yet this month can still surprise with the occasional hot day. This month also notes an appreciable drop in rainfall to 1.46" (37mm). As September progresses, the length of daylight continues to decrease, reflecting the seasonal transition that's under way. Humidity levels begin to subside, offering some relief from the high summer humidity.

Temperature

September in Townsend signals a slight drop in average high-temperature, sliding from August's warm 82.9°F (28.3°C) to a still moderately hot 77°F (25°C). Throughout September, Townsend encounters an average temperature drop to a comfortable 61°F (16.1°C).

Humidity

May, June and September, with an average relative humidity of 78%, are the most humid months.

Rainfall

In Townsend, in September, it is raining for 10.7 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 134.6 rainfall days, and 21.14" (537mm) of precipitation is accumulated.

Snowfall

In Townsend, snow does not fall in May through October.

Daylight

In September, the average length of the day in Townsend is 12h and 26min.
On the first day of the month, sunrise is at 6:31 am and sunset at 7:33 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:46 pm EDT.

Sunshine

In September, the average sunshine in Townsend is 9.2h.

UV index

The average daily maximum UV index in September in Townsend is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: In September, the maximum UV index of 5 suggests this advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What is the temperature in September in Townsend?

During September, Townsend experiences an average high-temperature of 77°F (25°C) and a low-temperature of 61°F (16.1°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, in August is computed to be 89.6°F (32°C).

What is the most humid month in Townsend?

May, June and September, with an average relative humidity of 78%, are most humid months in Townsend.

What is the average humidity in September in Townsend?

The average relative humidity in September in Townsend, Delaware, is 78%.

How many days does it rain in September in Townsend?

In Townsend, during September, the rain falls for 10.7 days and regularly aggregates up to 1.46" (37mm) of precipitation.

When it does not snow in Townsend?

May through October are months without snowfall in Townsend, Delaware.

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

In Townsend, Delaware, the average day length in September is 12h and 26min.

When is the sunrise / sunset in September in Townsend?

In September, on the first day of the month, sunrise is at 6:31 am and sunset at 7:33 pm. On the last day of the month, in Townsend, sunrise is at 6:58 am and sunset at 6:46 pm EDT.

How many hours of sunshine does Townsend have in September?

In Townsend, the average sunshine duration in September is 9.2h.

What is the UV index reading in September in Townsend?

In Townsend, Delaware, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes 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
77°F 25°C
65.3°F 18.5°C
Average low temperature
66.7°F 19.3°C
61°F 16.1°C
51.6°F 10.9°C
Average pressure
29.99" 762mmHg
30.05" 763mmHg
30.03" 763mmHg
Average wind speed
5.5mph 8.9km/h
6.2mph 10km/h
7.5mph 12.1km/h
Average max. wind speed
6.1mph 9.8km/h
6.4mph 10.3km/h
8.2mph 13.2km/h
Average wind speed gusts
8.9mph 14.3km/h
9.9mph 15.9km/h
12.4mph 20km/h
Average humidity
77%
78%
77%
Average rainfall
2.72" 69mm
1.46" 37mm
1.57" 40mm
Average rainfall days
13.6
10.7
9.7
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average daylight
13h 4min
12h 2min
11h 1min
Average sunshine
10h 2min
9h 1min
5h 4min
Average sunshine days
14.5
17.5
18.9
Average UV index
6
5
4
Average cloud cover
32%
36%
39%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in September
Townsend, DE

Average temperature in September - Townsend, DE
  • Average high temperature in September: 77°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in September: 61°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 (26.8°F).

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Average pressure in September
Townsend, DE

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

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Townsend, DE

Average wind speed in September - Townsend, DE
  • Average wind speed in September: 6.2mph

The windiest months (with the highest average wind speed) are February and March (9mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
Townsend, DE

Average humidity in September - Townsend, DE
  • Average humidity in September: 78%

The months with the highest relative humidity are May, June and September (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Townsend, DE

Average rainfall in September - Townsend, DE
  • Average rainfall in September: 1.46"

The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is January (1.26").

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Average rainfall days in September
Townsend, DE

Average rainfall days in September - Townsend, DE
  • Average rainfall days in September: 10.7 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in September
Townsend, DE

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

The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Townsend, DE

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

The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Townsend, 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: 9h and 1min

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
Townsend, DE

Average sunshine days in September - Townsend, DE
  • Average sunshine days in September: 17.5 days

The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in September
Townsend, DE

Average UV index in September - Townsend, DE
  • Average UV index in September: 5

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
Townsend, DE

Average cloud cover in September - Townsend, DE
  • Average cloud cover in September: 36

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

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Average visibility in September
Townsend, DE

Average visibility in September - Townsend, 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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Townsend, Delaware, USA

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