September weather forecast
Lincoln, DE

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Weather in September

September, the first month of the autumn in Lincoln, is still a warm month, with an average temperature varying between 64°F (17.8°C) and 76.1°F (24.5°C).

Temperature

September indicates a minor shift in the average high-temperature, from August's 81.5°F (27.5°C) to a still moderately hot 76.1°F (24.5°C). During September, an average low-temperature of 64°F (17.8°C) is observed.

Humidity

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

Rainfall

In Lincoln, in September, during 13.5 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. In Lincoln, during the entire year, the rain falls for 152.4 days and collects up to 25.94" (659mm) of precipitation.

Snowfall

In Lincoln, snow does not fall in April, June through October.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September, sunrise is at 6:31 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:45 pm EDT.

Sunshine

The average sunshine in September is 9.4h.

UV index

In Lincoln, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In September, a regular UV index of 5 translates into these guidelines:
Take precautions - Protection against sun damage is advised. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

Frequently asked questions

What is the usual temperature for Lincoln in September?

The high-temperature, in September, in Lincoln, is 76.1°F (24.5°C), while the low-temperature averages to 64°F (17.8°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is computed to be 87.8°F (31°C).

What is the average humidity in September in Lincoln?

In September, the average relative humidity is 79%.

How much does it rain in September?

In Lincoln, in September, during 13.5 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.

When it does not snow?

In Lincoln, snow does not fall in April, June through October.

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:31 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:45 pm EDT.

How many hours of sunshine does Lincoln have in September?

In Lincoln, the average sunshine duration in September is 9.4h.

How high is the UV index in September?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Lincoln, DE

Average temperature in September - Lincoln, DE
  • Average high temperature in September: 76.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).

Average pressure in September
Lincoln, DE

Average pressure in September - Lincoln, 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).

Average wind speed in September
Lincoln, DE

Average wind speed in September - Lincoln, DE
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is February (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in September
Lincoln, DE

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

The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January and November (74%).

Average rainfall in September
Lincoln, DE

Average rainfall in September - Lincoln, DE
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is August (3.07").
The driest month (with the least rainfall) is January (1.5").

Average rainfall days in September
Lincoln, DE

Average rainfall days in September - Lincoln, DE
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.4 days).

Average snowfall in September
Lincoln, DE

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

The month with the highest snowfall is January (1.22").
The months with the least snowfall are April, June, July, August, September and October (0").

Average snowfall days in September
Lincoln, DE

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

The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Lincoln, DE
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in September
Lincoln, DE

Average sunshine days in September - Lincoln, DE
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is July (11.6 days).

Average UV index in September
Lincoln, DE

Average UV index in September - Lincoln, 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).

Average cloud cover in September
Lincoln, DE

Average cloud cover in September - Lincoln, DE
  • Average cloud cover in September: 32

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in September
Lincoln, DE

Average visibility in September - Lincoln, 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).

Lincoln, Delaware, USA

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