The driest conditions of the growing season were observed over the reporting period with most of Iowa's National Weather Service stations observing no precipitation. Unseasonably cool temperatures were also reported with below normal departures of up to seven degrees observed in eastern Iowa; the statewide average temperature was 55.1 degrees, 4.0 degrees below normal.
Gusty northwesterly winds continued into Sunday (25th) afternoon under clear skies and seasonally high temperatures in the low to mid 70s. Cloudless skies remained overnight with Monday (26th) morning temperatures in the low to mid 40s as winds died down. Daytime temperatures varied from the low 60s north to low 70s southwest with pockets of partly cloudy skies in western Iowa. Variable winds developed through the nighttime hours with thicker cloud cover over much of the state; eastern Iowa remained clear as low temperatures statewide hovered in the upper 30s to mid 40s where clouds were present. Tuesday (27th) was a mirror-image day, though winds shifted to a northerly direction through the morning hours. Daytime conditions were clear, and temperatures remained in the upper 60s and low 70s. Under starlit skies and light winds, the first freeze of the season occurred across portions of northern Iowa with Wednesday (28th) morning lows dropping into the upper 20s; upper 30s and low 40s were observed farther south; the statewide average low was 34 degrees, 13 degrees below normal. Mid to upper 60s greeted the state through the afternoon with light winds and sunshine. Southeasterly winds built in overnight with temperatures dropping back into the upper 30s and low 40s with some fog and haze reported at stations in south-central Iowa.
Southerly winds developed through Thursday (29th) with mostly sunny conditions and temperatures reaching into the mid 70s west; mid 60s were observed across eastern Iowa. Light and very spotty showers formed in extreme northern Iowa after midnight and continued sporadically through Friday (30th) into the northeastern reaches of the state. The persistent flow out of the south help raise afternoon highs into the upper 70s in western Iowa; temperatures were anywhere from five to ten degrees cooler farther east. Cloud cover increased over northern Iowa into Saturday (1st) morning as isolated showers continued to form in western and northern Iowa, though much of the rainfall evaporated before hitting the ground. The warmest conditions of the week occurred during the late afternoon hours with highs pushing into the upper 70s and low 80s at many stations. Light winds continued into Sunday (2nd) with partly cloudy skies and lows in the upper 40s and low 50s.
Weekly precipitation totals ranged from no accumulation at most Iowa stations to 0.20 inch at Sheldon (O'Brien County) and Spirit Lake (Dickinson County). The statewide weekly average rainfall was 0.01 inch while the normal is 0.71 inch. Sioux Center (Sioux County) reported the week's high temperature of 83 degrees on the 1st, 11 degrees above normal. Vinton (Benton County) reported the week's low temperature of 26 degrees on the 28th, 19 degrees below normal.
Categories: Iowa, Crops, Weather