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This climate climate zone covers from about 44°N to 50°N latitude mostly east of the 100th meridian in North America. However, it can be found as far north as 54°N, and further west in the Canadian Prairie Provinces and below 40°N in the high Appalachians. In Europe this subtype reaches its most northerly latitude at nearly 61° N. Areas featuring this subtype of the continental climate have an average temperature in the warmest month below 22°C (22°F). Summer high temperatures in this zone typically average between 21-28°C (70-82°F) during the daytime and the average temperatures in the coldest month are generally far below the -3 °C (27°F) mark.
The Köppen Climate Classification subtype for this climate is "Dfb". (Warm Summer Continental Climate).
The average temperature for the year in Willimantic is 49.5°F (9.7°C). The warmest month, on average, is July with an average temperature of 71.6°F (22°C). The coolest month on average is January, with an average temperature of 26.1°F (-3.3°C).
The highest recorded temperature in Willimantic is 101.0°F (38.3°C), which was recorded in September. The lowest recorded temperature in Willimantic is -16.0°F (-26.7°C), which was recorded in January.
The average amount of precipitation for the year in Willimantic is 48.4" (1229.4 mm). The month with the most precipitation on average is October with 4.5" (114.3 mm) of precipitation. The month with the least precipitation on average is February with an average of 3.0" (76.2 mm). In terms of liquid precipitation, there are an average of 77.4 days of rain, with the most rain occurring in November with 7.3 days of rain, and the least rain occurring in June with 5.4 days of rain.
In Willimantic, there's an average of 43.6" of snow (0 cm). The month with the most snow is January, with 14.2" of snow (36.1 cm).