Southeast Lower Michigan

Included Counties: 
Genesee, Lapeer, Lenawee, Livingston, Macomb, Monroe, Oakland, St. Clair, Wayne, Washtenaw
Watersheds: 
Birch-Willow, Cass, Clinton, Detroit, Flint, Huron, Lake Erie, Lake Huron, Lake St. Clair, Ottawa-Stony, St. Clair, Raisin, Shiawassee, Tiffin, Upper Grand,

Geography

The Southeast Lower Climate Division of Michigan is bounded by the Ohio border to the south, Lake Huron, Lake St Clair, and Lake Erie to the east, and extends west to include the cities of Flint and Ann Arbor. The terrain is diverse, ranging from the extremely urbanized areas of downtown Detroit, to expansive agricultural lands in the Thumb, to rolling forests peppered with inland lakes in the central counties.

Overview

This division experiences a humid continental climate dominated primarily by the movement of high and low pressure systems. Large seasonal temperature variations and highly variable daily weather patterns are common. Long periods of intense heat or severe cold are relatively rare, and the Great Lakes do provide some moderation of temperature compared to areas at similar latitudes that are outside the Great Lakes Basin. There are occasional spells of lake-effect precipitation, but lake effects are typically limited to increased cloudiness in the fall and winter. Most of the annual precipitation falls during the summer months in the form of afternoon thunderstorms. Snow cover is less severe and of shorter duration than in northern regions of the state.

Changes In Precipitation

 in.cm.%
Annual4.711.915.54
Winter0.51.39.62
Spring1.23.014.42
Summer0.82.18.63
Fall2.05.128.76

Linear best-fit changes are calculated over the period 1950-2012. Percentage changes are calculated relative to the 1951-1980 historical reference period.

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Changes In Temperature

 °F°C
Annual2.31.3
Winter2.51.4
Spring3.31.8
Summer1.71.0
Fall1.40.8

Linear best-fit changes are calculated over the period 1950-2012. Percentage changes are calculated relative to the 1951-1980 historical reference period.

Seasonal Precipitation

Seasonal Temperature