Typical May conditions in Boston involve transitioning from spring’s chill to summer’s warmth. Daily high temperatures generally rise from the low 60s Fahrenheit (around 16-18 degrees Celsius) at the start of the month to the low 70s Fahrenheit (around 21-23 degrees Celsius) by the end. Overnight lows correspondingly increase from the mid-40s Fahrenheit (around 7-9 degrees Celsius) to the mid-50s Fahrenheit (around 12-14 degrees Celsius). Rainfall is relatively common, occurring on approximately 10-12 days throughout the month, with total accumulation averaging around 3-4 inches. Sunshine increases as the month progresses, offering increasingly longer daylight hours.
Understanding these typical climatic conditions is valuable for a variety of purposes. Planning outdoor activities, selecting appropriate attire, and even making informed decisions about travel and tourism become easier with this knowledge. Historically, May’s improving weather has signaled the start of Boston’s vibrant outdoor season, facilitating events and recreational activities. This period also marks a shift in the city’s atmosphere, with increased activity in parks, gardens, and outdoor spaces.