September weather forecast
Plymouth, FL

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Weather in September

September, the first month of the autumn in Plymouth, is still a tropical month, with an average temperature fluctuating between 88.7°F (31.5°C) and 74.1°F (23.4°C).

Temperature

September commences with an average high-temperature of a still hot 88.7°F (31.5°C), showing little deviation from August's 91°F (32.8°C). Plymouth experiences an average low-temperature of 74.1°F (23.4°C) in the month of September.

Heat index

Throughout September, the heat index is evaluated at an extremely hot 105.8°F (41°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

July through September, with an average relative humidity of 77%, are the most humid months in Plymouth, Florida.

Rainfall

In September, in Plymouth, Florida, the rain falls for 23.6 days. Throughout September, 4.53" (115mm) of precipitation is accumulated. Throughout the year, there are 195.8 rainfall days, and 37.68" (957mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall in Plymouth.

Daylight

In Plymouth, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:04 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:12 pm EDT.

Sunshine

In September, the average sunshine is 8.5h.

UV index

In September, the average daily maximum UV index in Plymouth is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in Plymouth in September?

An average high-temperature, in September, in Plymouth, is 88.7°F (31.5°C) and the average low-temperature is 74.1°F (23.4°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is evaluated at 105.8°F (41°C).

What are the most humid months in Plymouth?

July through September, with an average relative humidity of 77%, are most humid months in Plymouth.

What is the average humidity in September in Plymouth?

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

How much does it rain in Plymouth in September?

In Plymouth, Florida, during September, the rain falls for 23.6 days and regularly aggregates up to 4.53" (115mm) of precipitation.

When it does not snow in Plymouth?

February through December are months without snowfall.

How many hours of daylight does Plymouth have in September?

In September, the average day length in Plymouth, Florida, is 12h and 19min.

When is the sunrise / sunset in September in Plymouth?

On the first day of September, sunrise is at 7:04 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:12 pm EDT.

How long on average sun shines in September in Plymouth?

In Plymouth, Florida, the average sunshine duration in September is 8.5h.

What is the UV index reading in September in Plymouth?

In Plymouth, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Plymouth, FL

Average temperature in September - Plymouth, FL
  • Average high temperature in September: 88.7°F

The warmest months (with the highest average high temperature) are July and August (91°F).
The month with the lowest average high temperature is January (67.6°F).

  • Average low temperature in September: 74.1°F

The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is January (50.5°F).

Average pressure in September
Plymouth, FL

Average pressure in September - Plymouth, FL
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).

Average wind speed in September
Plymouth, FL

Average wind speed in September - Plymouth, FL
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).

Average humidity in September
Plymouth, FL

Average humidity in September - Plymouth, FL
  • Average humidity in September: 77%

The months with the highest relative humidity are July, August and September (77%).
The month with the lowest relative humidity is March (70%).

Average rainfall in September
Plymouth, FL

Average rainfall in September - Plymouth, FL
  • Average rainfall in September: 4.53"

The wettest months (with the highest rainfall) are July and August (6.14").
The driest month (with the least rainfall) is March (1.38").

Average rainfall days in September
Plymouth, FL

Average rainfall days in September - Plymouth, FL
  • Average rainfall days in September: 23.6 days

The month with the highest number of rainy days is August (27 days).
The month with the least rainy days is January (9.8 days).

Average snowfall days in September
Plymouth, FL

Average snowfall days in September - Plymouth, FL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in September /
Average sunshine in September
Plymouth, FL

Average daylight in September / Average sunshine in September - Plymouth, FL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in September: 8h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are November and December (Average sunshine: 6h and 6min).

Average sunshine days in September
Plymouth, FL

Average sunshine days in September - Plymouth, FL
  • Average sunshine days in September: 4.9 days

The month with the most sunshine days is January (18.8 days).
The month with the least sunshine days is August (2.6 days).

Average UV index in September
Plymouth, FL

Average UV index in September - Plymouth, FL
  • Average UV index in September: 6

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 4).

Average cloud cover in September
Plymouth, FL

Average cloud cover in September - Plymouth, FL
  • Average cloud cover in September: 33

The months with the most cloud cover are January and February (Cloud cover 38).
The month with the least cloud cover is May (Cloud cover 30).

Average visibility in September
Plymouth, FL

Average visibility in September - Plymouth, FL
  • 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).

Plymouth, Florida, USA

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