September weather forecast
Harrington, DE

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Weather in September

September observes a further drop in temperature to 76.5°F (24.7°C), transitioning Harrington into the autumn season. The rainfall, however, decreases to 2.44" (62mm) compared to the preceding August, revealing an observable drying trend. The leaves begin to change color, offering a picturesque landscape that is appealing to visitors. It is an ideal month for those who prefer the milder and more temperate weather conditions.

Temperature

September in Harrington brings a slight decrease in the average high-temperature, shifting from 82.2°F (27.9°C) in August to a still moderately hot 76.5°F (24.7°C). Throughout the month of September, Harrington sees a steady low-temperature average of 63.1°F (17.3°C).

Humidity

The months with the highest humidity in Harrington are May, August and September, with an average relative humidity of 79%.

Rainfall

In September, the rain falls for 13.6 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. In Harrington, during the entire year, the rain falls for 167.5 days and collects up to 35.35" (898mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 6:31 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:46 pm EDT.

Sunshine

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

UV index

In Harrington, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 5 during September morphs into the following directions:
Act with care - The suggestion to avoid sunburn is emphasized. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
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Frequently asked questions

What is the average September temperature in Harrington?

The average high-temperature and low-temperature in Harrington, Delaware, during September are 76.5°F (24.7°C) and 63.1°F (17.3°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in August is appraised at 89.6°F (32°C).

What are the most humid months in Harrington?

May, August and September, with an average relative humidity of 79%, are most humid months in Harrington.

What is the average humidity in September in Harrington?

The average relative humidity in September in Harrington, Delaware, is 79%.

How much does it rain in Harrington in September?

In Harrington, in September, during 13.6 rainfall days, 2.44" (62mm) of precipitation is typically accumulated.

When it does not snow in Harrington?

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

How many hours of daylight does Harrington have in September?

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

When is the sunrise / sunset in September in Harrington?

On the first day of September in Harrington, Delaware, sunrise is at 6:31 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:46 pm EDT.

How long on average sun shines in September in Harrington?

In September, the average sunshine duration is 9.2h.

What is the UV index intensity in September in Harrington?

In Harrington, Delaware, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASeptemberOND
Aug
September
Oct
Average high temperature
82.2°F 27.9°C
76.5°F 24.7°C
65.8°F 18.8°C
Average low temperature
68.2°F 20.1°C
63.1°F 17.3°C
53.6°F 12°C
Average pressure
29.98" 761mmHg
30.04" 763mmHg
30.03" 763mmHg
Average wind speed
6.3mph 10.1km/h
7.3mph 11.7km/h
8.6mph 13.8km/h
Average max. wind speed
6.8mph 10.9km/h
7.5mph 12.1km/h
9.4mph 15.1km/h
Average wind speed gusts
10.4mph 16.7km/h
11.8mph 19km/h
14.2mph 22.9km/h
Average humidity
79%
79%
77%
Average rainfall
3.9" 99mm
2.44" 62mm
3.07" 78mm
Average rainfall days
16.9
13.6
12.5
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
12
13.9
16.1
Average UV index
6
5
4
Average cloud cover
31%
34%
39%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in September
Harrington, DE

Average temperature in September - Harrington, DE
  • Average high temperature in September: 76.5°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (40.3°F).

  • Average low temperature in September: 63.1°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in September
Harrington, DE

Average pressure in September - Harrington, DE
  • Average pressure in September: 30.04"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
Harrington, DE

Average wind speed in September - Harrington, DE
  • Average wind speed in September: 7.3mph

The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity in September
Harrington, DE

Average humidity in September - Harrington, DE
  • Average humidity in September: 79%

The months with the highest relative humidity are May, August and September (79%).
The months with the lowest relative humidity are January, March, April and November (74%).

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Average rainfall in September
Harrington, DE

Average rainfall in September - Harrington, DE
  • 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 January (2.13").

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Average rainfall days in September
Harrington, DE

Average rainfall days in September - Harrington, DE
  • Average rainfall days in September: 13.6 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (9 days).

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Average snowfall in September
Harrington, DE

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

The month with the highest snowfall is January (1.93").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Harrington, DE

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

The month with the highest number of snowfall days is January (4.3 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
Harrington, DE

Average daylight in September / Average sunshine in September - Harrington, 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 30min).

  • 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
Harrington, DE

Average sunshine days in September - Harrington, DE
  • Average sunshine days in September: 13.9 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (9.7 days).

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Average UV index in September
Harrington, DE

Average UV index in September - Harrington, 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 and December (UV index 2).

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Average cloud cover in September
Harrington, DE

Average cloud cover in September - Harrington, DE
  • Average cloud cover in September: 34

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in September
Harrington, DE

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

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