noun, plural ambiguities. 1. doubtfulness or uncertainty of meaning or intention: to speak with ambiguity; an ambiguity of manner. 2. an unclear, indefinite, or equivocal word, expression, meaning, etc.: a contract free of ambiguities; the ambiguities of modern poetry. Origin of ambiguity.
With four distinct seasons, Boston's weather is forever changing. Summer can be delightful with the ocean breezes helping keep the humid temps in control. Evening temperatures can be cool and may require a light sweater. And a pop up thunderstorm is not uncommon, so you may want to include an umbrella in your bag.
Averages for Boston in September. September is slightly cooler than previous months but is still fairly warm. The average temperature still reaches a high of 22Â°C (that's about 72Â°F) during the day and dips to a fairly mild 13Â°C (about 55Â°F) in the evenings. You can still expect rain on an average of 9 days of the month.