Typical May conditions in Boston involve transitioning from spring’s early stages to more consistently warmer temperatures. Average highs climb into the mid-60s Fahrenheit (around 18-19 degrees Celsius), while overnight lows generally stay above 50F (around 10C). Rainfall is common, with measurable precipitation occurring on approximately one-third of the days in the month. While sunshine increases compared to earlier spring months, cloud cover remains relatively frequent.
Understanding historical climate data and typical conditions for this period is valuable for planning a variety of activities. Travelers can pack appropriate clothing and prepare for potential rain. Event organizers can make informed decisions regarding outdoor venues and contingency plans. Businesses reliant on weather, such as tourism and agriculture, can anticipate demand and adjust operations accordingly. Examining historical trends also offers insights into long-term climate patterns and potential deviations from the norm.