| ||||||||||
| ||||||||||
A joint service of the UK Ag Weather Center and the National Weather Service.
Precision Agriculture Weather Forecast For MADISON CountyFor Your Farm PointAgCast...Click here. Regional Hourly Observations For MADISON County Issued at 1100 AM CDT SAT AUG 15 2026 CENTRAL IOWA CITY SKY/WX TMP DP RH WIND PRES REMARKS AMES CLOUDY 77 73 87 SE6 30.01R TC 25 ANKENY * CLOUDY 77 77 100 CALM 30.01S TC 25 BOONE * CLOUDY 75 75 100 SE5 30.01R TC 24 CHARITON * CLOUDY N/A N/A N/A SE3 30.01S DES MOINES CLOUDY 78 75 90 NE5 30.01S HX 81 TC 26 KNOXVILLE * CLOUDY 79 77 94 SE7 30.01S HX 83 TC 26 MARSHALLTOWN CLOUDY 78 74 87 E5 30.01F HX 81 TC 26 PELLA * CLOUDY 79 76 91 CALM 30.02S HX 83 TC 26 PERRY * CLOUDY 76 76 100 CALM 29.99F TC 25
Current Agricultural Weather Conditions in Iowa Based on observations at 1100am CDT, Saturday August 15, 2026 Across Iowa...temperatures are near 76 degrees west, near 78 degrees central, and near 77 degrees east. Current sky conditions are cloudy west, cloudy central, and cloudy east. In the west, relative humidity is near 93%, and the dew point is near 74 degrees. In the central part of the state, relative humidity is near 90%, and the dew point is near 75 degrees. The heat index is near 81 degrees central. In the east, relative humidity is near 87%, and the dew point is near 73 degrees. The livestock heat stress category is no stress west, no stress central, and no stress east. There is patchy fog west. Winds are from the west at 7 mph west, where conditions are favorable for spraying. Winds are from the northeast at 5 mph central, where conditions are favorable for spraying. Winds are from the southwest at 7 mph east, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 79 degrees at Pella. The lowest temperature is 72 degrees at Dubuque.
Current NOWCAST not available: Nowcasts are not issued routinely during fair weather. Only when precipitation or other significant weather is occuring in this county will these forecasts be issued. Currently, there is no short term forecast in effect. Hazardous Weather Outlook For MADISON County,IA 1036 AM CDT Sat Aug 15 2026 DAY ONE Today and tonight Scattered thunderstorms are expected later today into tonight. A few strong to severe storms will be possible, mainly across the southern half of Iowa, with isolated damaging wind gusts being the primary threat along with locally heavy rain. DAYS TWO THROUGH SEVEN Sunday through Friday A slight chance of thunderstorms is forecast across southern Iowa on Sunday. Severe weather is unlikely. More widespread thunderstorm chances then return from Monday night into Wednesday. Any severe weather threats during that time will be determined in the coming days. SPOTTER INFORMATION STATEMENT Severe weather and rainfall reports are appreciated.
7-Day Forecast For MADISON County, IA 1132 AM CDT Sat Aug 15 2026 REST OF TODAY TONIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY
Medium & Long Range Outlook For Iowa
IOWA
---------------------------------------------
6 TO 10 DAY 8 TO 14 DAY 30 DAY 90 DAY
AUG 20-24 AUG 22-28 JUN JUN-AUG
----------- ----------- -------- ---------
Temperature: Above Above
Precipitation: Normal Normal
.... Medium and long range outlooks provided by NCEP/K. Thomas Priddy
Almanac Information Historical Weather And Climate Facts For Today /////////////////////////// AUGUST 15TH...HISTORIC WEATHER EVENTS ...1787... Tornadoes were reported in Connecticut, Rhode Island, Massachusetts, and New Hampshire. Wethersfield CT was hard hit by the tornado outbreak. (David Ludlum) ...1946... Saint Louis MO was deluged with a record 8.78 inches of rain in 24 hours. (The Weather Channel) ...1967... The "sundance fire" in northern Idaho was started by lightning. Winds of 50 mph carried firebrands as much as ten miles in advance to ignite new fires, and as a result, the forest fire spread twenty miles across the Selkirk Mountains in just twelve hours, burning 56,000 acres. The heat of the fire produced whirlwinds of flame with winds up to 300 mph which flung giant trees about like matchsticks. (David Ludlum) ...1987... Thunderstorms developing ahead of a sharp cold front produced severe weather in the Upper Midwest during the afternoon and evening hours, with Minnesota and eastern South Dakota hardest hit. A thunderstorm in west central Minnesota spawned a tornado at Eagle Lake which killed one person and injured eight others. A thunder- storm in eastern South Dakota produced softball size hail at Warner. (The National Weather Summary) (Storm Data) ...1988... Thirty five cities in twenty states in the north central and northeastern U.S. reported record high temperatures for the date, including Lamoni IA and Baltimore MD, where the mercury hit 105 degrees. Temperatures 100 degrees or above were reported in twenty-two states. Pierre SD was the hot spot in the nation with a high of 114 degrees. Bluefield WV reported eight straight days of record heat. (The National Weather Summary) ...1989... Evening thunderstorms in eastern New Mexico produced wind gusts to 66 mph at Clovis. Evening thunderstorms in West Texas produced baseball size hail around Hereford, Dimmitt, Ware and Dalhart. (The National Weather Summary) (Storm Data) Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky | ||||||||||