September weather forecast
Cerulean, KY

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Weather in September

September brings a notable change to the weather in Cerulean, Kentucky, as it cools down to a high of 81.1°F (27.3°C) and a low of 61.7°F (16.5°C). This cooling transition makes the weather significantly different from that of August and even more so from the upcoming October. Sunshine continues, albeit at a less intense rate, offering an inviting blend of warm days and a gentle breeze. With minimal rainfall, September stays mostly dry, providing the perfect weather for outdoor activities.

Temperature

Cerulean experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from a hot 86.5°F (30.3°C) in August to a warm 81.1°F (27.3°C). Nighttime temperature in Cerulean lowers to an average of 61.7°F (16.5°C) in September.

Heat index

The heat index value during September is calculated to be a tropical 86°F (30°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.

Humidity

The average relative humidity in September in Cerulean is 73%.

Rainfall

The month with the least rainfall is September, when the rain falls for 11.2 days and typically collects 1.73" (44mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In Cerulean, the average length of the day in September is 12h and 24min.
On the first day of September, sunrise is at 6:22 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:35 pm CDT.

Sunshine

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

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: During September, 5 as the daily maximum UV index converts into the following advice:
Put precautions into practice - Ensuring skin and eye safety is a necessity. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
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Frequently asked questions

What is the usual temperature for Cerulean in September?

In Cerulean, 81.1°F (27.3°C) is the average high-temperature and 61.7°F (16.5°C) is the average low-temperature during September. In September, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is calculated to be 86°F (30°C).

What is the average humidity in September in Cerulean?

In September, the average relative humidity in Cerulean is 73%.

What is the driest month in Cerulean?

September is the month with the least rainfall in Cerulean. Rain falls for 11.2 days and accumulates 1.73" (44mm) of precipitation.

How much does it rain in Cerulean in September?

In Cerulean, Kentucky, in September, it is raining for 11.2 days, with typically 1.73" (44mm) of accumulated precipitation.

When it does not snow in Cerulean?

In Cerulean, Kentucky, snow does not fall in May through September.

Does it snow in Cerulean in September?

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

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

In September, the average day length in Cerulean is 12h and 24min.

What time are sunrise and sunset in September in Cerulean?

In September, on the first day of the month, sunrise is at 6:22 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:35 pm CDT.

How long on average sun shines in September in Cerulean?

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

How high is the UV index in September in Cerulean?

In September, the average daily maximum UV index in Cerulean is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
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
Cerulean, KY

Average temperature in September - Cerulean, KY
  • Average high temperature in September: 81.1°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (42.1°F).

  • Average low temperature in September: 61.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in September
Cerulean, KY

Average pressure in September - Cerulean, KY
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

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Average wind speed in September
Cerulean, KY

Average wind speed in September - Cerulean, KY
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are February and April (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

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Average humidity in September
Cerulean, KY

Average humidity in September - Cerulean, KY
  • Average humidity in September: 73%

The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Cerulean, KY

Average rainfall in September - Cerulean, KY
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is February (4.45").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in September
Cerulean, KY

Average rainfall days in September - Cerulean, KY
  • Average rainfall days in September: 11.2 days

The month with the highest number of rainy days is March (16.4 days).
The month with the least rainy days is November (9.9 days).

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Average snowfall in September
Cerulean, KY

Average snowfall in September - Cerulean, KY
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.05").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Cerulean, KY

Average snowfall days in September - Cerulean, KY
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Cerulean, KY

Average daylight in September / Average sunshine in September - Cerulean, KY
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

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Average sunshine days in September
Cerulean, KY

Average sunshine days in September - Cerulean, KY
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is February (11.6 days).

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Average UV index in September
Cerulean, KY

Average UV index in September - Cerulean, KY
  • 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 and December (UV index 2).

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Average cloud cover in September
Cerulean, KY

Average cloud cover in September - Cerulean, KY
  • Average cloud cover in September: 28

The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are June and September (Cloud cover 28).

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Average visibility in September
Cerulean, KY

Average visibility in September - Cerulean, KY
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

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Cerulean, Kentucky, USA

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