The highest day temperature in January 2026 was 84°F. The lowest night temperature was 45°F. The average values for day and night temperatures during January were 73.0°F и 61.5°F respectivly.

The average sea surface temperature in January 2026 for Sanibel Island was 69.1°F. The maximum and minimum values were 63.6°F and 74.0°F respectively.

Most of the days in January are sunny but you can also expect cloudy and gloomy days.

Precipitation total in January for Sanibel Island is 0.3 in. It makes january the least rainy month of the year.

The average wind speed in January is 10.3 mph. It makes January one of the most windy months of the year for Sanibel Island.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Sanibel Island in January is 7.0 hours.