Weather in January in Boston, Massachusetts

< January >
	Normal Max/ High Temperature	2°C (36°F)
	Average Temperature	-2°C (29°F)
	Min/ Low Temperature	-6°C (22°F)
	Average Sea or Water Temp	2°C(36°F)
	Normal Precipitation	91mm (3.6in)
	Number of Wet Days (probability of rain on a day)	12 (39%)
	Average Sunlight per day	04h 52'
	Average Daylight per day	09h 27'
	Sunny (Cloudy) Daylight Hours	52% (48%)
	Sun altitude at solar noon on the 21st day.	27.8°

• The average sea tempeature is 2 °C (35.6 °F).
• The average temperature in Boston, Massachusetts in January is slightly cold at -1.9 °C (28.58 °F).
• Afternoons can be very cool with average high temperatures reaching 2.1 °C (35.8 °F).
• Overnight temperatures are generally cold with an average low of -5.8 °C (21.6 °F).
• The average diurnal temperature variation/ range in January is 7.9 °C (14.2 °F).
• Precipitation averages for January are high with 91.2mm (3.6 in) recorded across 12 days.
• In January the skies in Boston, Massachusetts are slightly fair with an average of a mediocre 4h 52' of gorgeous sunshine per day.
• The shortest day is 9h 08' long and the longest day is 9h 53' long with an average length of 9h 27'.
• There are approximately 4h 24' per day when the sun is occluded by cloud, haze, fog etc.
• It is sunny approximately 52.5% of daylight hours and cloudy 47.5% of daylight hours.

Weather Trend Graph for January in Boston, Massachusetts, Usa