January weather forecast
Sanibel, FL

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A large flock of the iconic royal tern birds on the white sandy shores on a typical beach in Sanibel, Florida
A large flock of the iconic royal tern birds on the white sandy shores on a typical beach in Sanibel, Florida

Weather in January

Sanibel's weather towards the start of the year reveals a climate combining humidity, rainfall, and mild temperatures. Despite its placement in winter, Sanibel experiences a relatively warm January, with temperatures rarely dipping below the pleasant mark. The highest daily average temperature is approximately 69.8°F (21°C), ensuring comfortable conditions for varied activities. Noticeably, January has a striking balance between humidity and cloudiness, providing agreeable skies for the island's visitors. Sunshine hours regularly clock in at about 7.4 hours a day, supporting outdoor ventures and tourism activities.

Temperature

With average high temperatures of 69.8°F (21°C) and lows of 59.5°F (15.3°C), January is the coldest month in Sanibel.

Humidity

In January, the average relative humidity in Sanibel, Florida, is 74%.

Rainfall

In Sanibel, in January, during 9.3 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Sanibel, during the entire year, the rain falls for 190.9 days and collects up to 41.73" (1060mm) of precipitation.

Ocean temperature

With an average ocean temperature of 65.3°F (18.5°C), January is the month with the coldest seawater.
Note: Most people do not find pleasure in swimming when the water temperature is 65.3°F (18.5°C). Breathing becomes increasingly difficult to manage as the water temperature drops from 69.8°F (21°C) to 59°F (15°C).

Daylight

The average length of the day in January is 10h and 42min.
On the first day of January, sunrise is at 7:16 am and sunset at 5:47 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:09 pm EST.

Sunshine

The average sunshine in January is 7.4h.

UV index

The months with the lowest UV index in Sanibel are January and February, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in January interprets into the following advice:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. 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.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest in Sanibel?

During the coldest month in Sanibel, January, temperatures average a high of 69.8°F (21°C) and a low of 59.5°F (15.3°C).

What is the average January temperature in Sanibel?

Sanibel in January has an average high-temperature of 69.8°F (21°C) and an average low-temperature of 59.5°F (15.3°C).

What is the average humidity in January in Sanibel?

The average relative humidity in January in Sanibel, Florida, is 74%.

How much does it rain in Sanibel in January?

In Sanibel, during January, the rain falls for 9.3 days and regularly aggregates up to 1.46" (37mm) of precipitation.

What month is the ocean coldest in Sanibel?

The month with the coldest seawater in Sanibel, Florida, is January, with an average ocean temperature of 65.3°F (18.5°C).

What is the ocean temperature in January in Sanibel?

In Sanibel, in January, the average water temperature is 65.3°F (18.5°C). For most, swimming in 65.3°F (18.5°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the average length of the day in January in Sanibel?

The average day length in January in Sanibel is 10h and 42min.

What time are sunrise and sunset in January in Sanibel?

On the first day of January in Sanibel, sunrise is at 7:16 am and sunset at 5:47 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:09 pm EST.

How many hours of sunshine does Sanibel have in January?

In Sanibel, the average sunshine duration in January is 7.4h.

When is the lowest UV index in Sanibel?

January and February, with an average maximum UV index of 5, are months with the lowest UV index in Sanibel, Florida.

What is the UV index intensity in January in Sanibel?

In January, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.

Average temperature in January
Sanibel, FL

Average temperature in January - Sanibel, FL
  • Average high temperature in January: 69.8°F

The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is January (69.8°F).

  • Average low temperature in January: 59.5°F

The month with the highest average low temperature is August (81.1°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).

Average pressure in January
Sanibel, FL

Average pressure in January - Sanibel, FL
  • Average pressure in January: 30.11"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).

Average wind speed in January
Sanibel, FL

Average wind speed in January - Sanibel, FL
  • Average wind speed in January: 9.9mph

The windiest months (with the highest average wind speed) are October and November (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).

Average humidity in January
Sanibel, FL

Average humidity in January - Sanibel, FL
  • Average humidity in January: 74%

The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are March, May, July, August and October (73%).

Average rainfall in January
Sanibel, FL

Average rainfall in January - Sanibel, FL
  • Average rainfall in January: 1.46"

The wettest month (with the highest rainfall) is August (8.54").
The driest month (with the least rainfall) is February (1.06").

Average rainfall days in January
Sanibel, FL

Average rainfall days in January - Sanibel, FL
  • Average rainfall days in January: 9.3 days

The month with the highest number of rainy days is August (27.3 days).
The month with the least rainy days is February (8.2 days).

Average sea temperature in January
Sanibel, FL

Average sea temperature in January - Sanibel, FL
  • Average sea temperature in January: 65.3°F

The best month for swimming (with the highest average sea temperature) is August (87.1°F).
The coldest month (with the lowest average sea temperature) is January (65.3°F).

Average daylight in January /
Average sunshine in January
Sanibel, FL

Average daylight in January / Average sunshine in January - Sanibel, FL
  • Average daylight in January: 10h and 4min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in January: 7h and 2min

The month with the most sunshine is May (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

Average sunshine days in January
Sanibel, FL

Average sunshine days in January - Sanibel, FL
  • Average sunshine days in January: 19.8 days

The month with the most sunshine days is January (19.8 days).
The month with the least sunshine days is August (2.3 days).

Average UV index in January
Sanibel, FL

Average UV index in January - Sanibel, FL
  • Average UV index in January: 5

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and February (UV index 5).

Average cloud cover in January
Sanibel, FL

Average cloud cover in January - Sanibel, FL
  • Average cloud cover in January: 29

The month with the most cloud cover is January (Cloud cover 29).
The months with the least cloud cover are March and May (Cloud cover 23).

Average visibility in January
Sanibel, FL

Average visibility in January - Sanibel, FL
  • Average visibility in January: 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).

Sanibel, Florida, USA

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