Climate of The Bahamas
Having a tropical maritime wet and dry type climate with winter incursions of modified polar air, generally The Bahamas experiences neither frost, snow, sleet, hail nor extremes of temperatures. A unique exception to that occurred on January 19th, 1977, when parts of the northern Bahamas experienced a brief flurry of light snow. Climatological data (following) covers the 30-year period between 1971 & 2000. The lowest recorded temperature was 41.4°F on January 20th, 1981.
In New Providence, winter temperature seldom fall much below 60°F and usually reach about 75°F during the afternoon. In the summer temperatures usually fall to 78°F or less at night and seldom rise above 90°F during the day. In the more northerly islands, winter temperature are somewhat lower than in New Providence, and some 5 degrees higher in the southern islands in summer months, temperature tend to be similar all over The Bahamas.
Sea surface temperature normally vary between 74°F in February and 83°F in August.
Humidity is fairly high, especially in the summer months. Winds are predominantly easterly throughout the year, but with a tendency to become northeasterly from October to April and southeasterly from May to September. Wind speeds are, on average below 10 knots; in winter months, periods of a day to two of north and northeast winds of about 25 knots may occur.
There are more than seven hours of bright sunshine per day in Nassau on average, though periods of a day or two of cloudy weather can occur at any time of year. The length of day (the interval between sunrise and sunset) varies from 10 hours and 35 minutes in late December to 13 hours and 41 minutes in late June.
Rain showers occur any time of the year, but the rainy months are May to October; for example, in Nassau, rainfall averages 2 inches a month from November to April and 6 inches a month from May to October. In the northern islands, it is up to 20% more. The southern islands normally receive only half the Nassau total. Rainfall is mainly in the form of heavy showers or thundershowers, which clear quickly.