September weather forecast
Hollister, FL

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Weather in September

September, the first month of the autumn in Hollister, is also a hot month, with an average temperature fluctuating between 73°F (22.8°C) and 88.5°F (31.4°C).

Temperature

Welcoming September, Hollister notes an average high-temperature of a still hot 88.5°F (31.4°C), nearly consistent with August's 91.9°F (33.3°C). In the month of September, an average of 73°F (22.8°C) marks the low-temperature in Hollister.

Heat index

September's average heat index is calculated to be an extremely hot 105.8°F (41°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

The months with the highest humidity in Hollister are August, September and December, with an average relative humidity of 77%.

Rainfall

In September, in Hollister, the rain falls for 15.2 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. In Hollister, during the entire year, the rain falls for 138.3 days and collects up to 12.76" (324mm) of precipitation.

Snowfall

In Hollister, snow does not fall in February through December.

Daylight

In September, the average length of the day in Hollister is 12h and 20min.
On the first day of the month, sunrise is at 7:04 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:13 pm EDT.

Sunshine

In September, the average sunshine is 8.5h.

UV index

In September, the average daily maximum UV index in Hollister is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 6 during September translates into the following directions:
Prevent overexposure. Protection from the sun's harmful effects is needed. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Frequently asked questions

How hot is September in Hollister?

An average high-temperature, in September, in Hollister, is 88.5°F (31.4°C) and the average low-temperature is 73°F (22.8°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in September is calculated to be 105.8°F (41°C).

What is the most humid month in Hollister?

August, September and December, with an average relative humidity of 77%, are most humid months in Hollister, Florida.

What is the average humidity in September in Hollister?

The average relative humidity in September in Hollister is 77%.

How much does it rain in Hollister in September?

In Hollister, during September, the rain falls for 15.2 days and regularly aggregates up to 1.18" (30mm) of precipitation.

When it does not snow in Hollister?

In Hollister, Florida, snow does not fall in February through December.

How many hours of daylight does Hollister have in September?

In September, the average day length in Hollister, Florida, is 12h and 20min.

What time are sunrise and sunset in September in Hollister?

On the first day of September in Hollister, Florida, sunrise is at 7:04 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:13 pm EDT.

How many hours of sunshine does Hollister have in September?

The average sunshine duration in September in Hollister is 8.5h.

How high is the UV index in September in Hollister?

The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk 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
Hollister, FL

Average temperature in September - Hollister, FL
  • Average high temperature in September: 88.5°F

The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is January (65.8°F).

  • Average low temperature in September: 73°F

The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (48.2°F).

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Average pressure in September
Hollister, FL

Average pressure in September - Hollister, 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).

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Average wind speed in September
Hollister, FL

Average wind speed in September - Hollister, FL
  • Average wind speed in September: 4.6mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).

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Average humidity in September
Hollister, FL

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

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

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Average rainfall in September
Hollister, FL

Average rainfall in September - Hollister, FL
  • Average rainfall in September: 1.18"

The wettest month (with the highest rainfall) is July (2.09").
The driest month (with the least rainfall) is March (0.47").

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Average rainfall days in September
Hollister, FL

Average rainfall days in September - Hollister, FL
  • Average rainfall days in September: 15.2 days

The month with the highest number of rainy days is August (18.8 days).
The month with the least rainy days is November (6.7 days).

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Average snowfall days in September
Hollister, FL

Average snowfall days in September - Hollister, 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).

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

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

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in September: 8h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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Average sunshine days in September
Hollister, FL

Average sunshine days in September - Hollister, FL
  • Average sunshine days in September: 12.1 days

The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is June (9.3 days).

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Average UV index in September
Hollister, FL

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

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

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Average cloud cover in September
Hollister, FL

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

The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are May and July (Cloud cover 30).

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Average visibility in September
Hollister, FL

Average visibility in September - Hollister, 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).

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Hollister, Florida, USA

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