Browse Miscellaneous Publications - Illinois State Water Survey by Series/Report "ISWS Miscellaneous Publication MP-098-03"

  • Bryan, Audrey A.; Armstrong, Wayne (Illinois State Water Survey, 1991)
    Decatur (Macon County) has a temperate continental climate, dominated by maritime tropical air from the Gulf of Mexico from about late April through mid-October. Gulf air generally supports relative humidities of about 50% ...

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