emperatures and precipitation this month will buck typical La Nina transition patterns if this summer’s trends hold.
The three summer months of 2016 (June through August) averaged 1.3 degrees above normal for Iowa. This continued through late September as average temperatures were running 3 to 6 degrees above normal, but there were some cooler days to finish the month.
Summer rainfall was above normal for Iowa, even with June being a drier-than-normal month. September rainfall again made headlines in the state, with heavy amounts causing significant late September flooding in some areas.
September rainfall will average well above normal for Iowa, but a trend of highly variable amounts continued, something we have seen in all ...