This report describes the typical weather at the Hunter Aff (Savannah, Georgia, United States) weather station over the course of an average January. It is based on the historical records from 1975 to 2012. Earlier records are either unavailable or unreliable.
Savannah, Georgia has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by forests (58%), oceans and seas (21%), croplands (13%), lakes and rivers (4%), and grasslands (3%).
The month of January is characterized by essentially constant daily high temperatures, with daily highs around 60°F throughout the month, exceeding 73°F or dropping below 46°F only one day in ten.
Over the course of January, the length of the day is gradually increasing. The shortest day of the month is January 1 with 10:05 hours of daylight; the longest day is January 31 with 10:39 hours of daylight.
The earliest sunrise is at 7:19am on January 31; the latest sunset is at 5:57pm on January 31; the latest sunrise is at 7:26am on January 9; the earliest sunset is at 5:31pm on January 1.
Daylight saving time is observed in 2012 but it neither starts nor ends in January, so the entire month is in standard time.
The median cloud cover ranges from 59% (partly cloudy) to 64% (partly cloudy).
On January 16, a representative day, the sky is clear or mostly clear 39% of the time, partly cloudy 4% of the time, and mostly cloudy or overcast 43% of the time.
The average probability that some form of precipitation will be observed in a given day is 40%, with little variation over the course of the month.
Throughout January, the most common forms of precipitation are light rain, moderate rain, and drizzle.
Light rain is the most severe precipitation observed during 55% of those days with precipitation. It is most likely around January 8, when it is observed during 22% of all days.
Moderate rain is the most severe precipitation observed during 19% of those days with precipitation. It is most likely around January 7, when it is observed during 8% of all days.
Drizzle is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around January 14, when it is observed during 6% of all days.
Either snow is exceptionally unlikely to fall at this location in January or this station does not reliably report precipitation types.
The relative humidity typically ranges from 46% (comfortable) to 90% (very humid) over the course of a typical January, rarely dropping below 23% (dry) and reaching as high as 100% (very humid).
The air is driest around January 21, at which time the relative humidity drops below 60% (mildly humid) three days out of four; it is most humid around January 2, rising above 84% (humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical January, the dew point typically varies from 31°F (dry) to 48°F (dry) and is rarely below 13°F (dry) or above 64°F (mildy humid).
Over the course of January typical wind speeds vary from 1 mph to 13 mph (calm to moderate breeze), rarely exceeding 19 mph (fresh breeze).
The highest average wind speed of 7 mph (light breeze) occurs around January 27, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around January 1, at which time the average daily maximum wind speed is 11 mph (gentle breeze).