A decade of observations blended into one year, read at the chosen time of day, so a date says what it is usually like rather than forecasting one. Rainfall is cumulative over each ten-day section.
In a typical year, Revere swings from about 1°C in its coolest month to 27°C at the height of summer, averaging 13.9°C. Rain runs heaviest around April and thins out near August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.