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A joint service of the UK Ag Weather Center and the National Weather Service.
Precision Agriculture Weather Forecast For HAMILTON CountyFor Your Farm PointAgCast...Click here. Regional Hourly Observations For HAMILTON County Issued at 500 AM CDT TUE JUL 21 2026 NORTH CENTRAL IOWA CITY SKY/WX TMP DP RH WIND PRES REMARKS CLARION * PTCLDY 64 64 100 NW5 29.85S TC 18 ESTHERVILLE CLEAR 65 61 87 NW7 29.87R TC 18 FORT DODGE * CLEAR 68 61 78 VRB3 29.87R TC 20 MASON CITY CLEAR 68 62 81 NW13 29.82R TC 20
Current Agricultural Weather Conditions in Iowa Based on observations at 400am CDT, Tuesday July 21, 2026 Across Iowa...temperatures are near 69 degrees west, near 73 degrees central, and near 73 degrees east. Current sky conditions are partly cloudy west, cloudy central, and cloudy east. In the west, relative humidity is near 78%, and the dew point is near 62 degrees. In the central part of the state, relative humidity is near 96%, and the dew point is near 72 degrees. In the east, relative humidity is near 90%, and the dew point is near 70 degrees. The livestock heat stress category is no stress west, no stress central, and no stress east. Winds are from the northwest at 6 mph west, where conditions are favorable for spraying. Winds are from the west at 6 mph central, where conditions are favorable for spraying. Winds are from the west at 10 mph east, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 76 degrees at Quad Cities. The lowest temperature is 63 degrees at Spencer.
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 HAMILTON County,IA 439 AM CDT Tue Jul 21 2026 DAY ONE Today and tonight No hazardous weather is expected at this time. DAYS TWO THROUGH SEVEN Wednesday through Monday Additional thunderstorms are possible Thursday night into Friday. SPOTTER INFORMATION STATEMENT Spotter activation will not be needed.
7-Day Forecast For HAMILTON County, IA 233 AM CDT Tue Jul 21 2026 TODAY TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY
Medium & Long Range Outlook For Iowa
IOWA
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6 TO 10 DAY 8 TO 14 DAY 30 DAY 90 DAY
JUL 26-30 JUL 28-AUG 3 JUN JUN-AUG
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Temperature: Above Above
Precipitation: Below Below
.... Medium and long range outlooks provided by NCEP/K. Thomas Priddy
Almanac Information Historical Weather And Climate Facts For Today /////////////////////// JULY 21ST...HISTORIC WEATHER EVENTS ...1896... Shelbyville, Kentucky's wettest day on record, with 7.15 inches of rain. ...1911... The temperature at Painter WY dipped to 10 degrees to equal the record low for July for the continental U.S. (The Weather Channel) ...1934... The temperature reached 109 degrees at Cincinnati OH to cap their hottest summer of record. The state record for Ohio was established that day with a reading of 113 degrees near the town of Gallipolis. (David Ludlum) ...1975... Six inches of rain fell across Mercer County NJ in just ten hours causing the worst flooding in twenty years. Assunpink Creek crested eleven feet above flood stage at Hamilton and Trenton, the highest level of record. Traffic was brought to a standstill, and railway service between New York City and Washington D.C. was cut off for two days. Flooding left 1000 persons homeless, and caused an estimated 25 million dollars damage. (David Ludlum) ...1987... Thunderstorms produced severe weather from Utah to North Dakota, spawning a dozen tornadoes in North Dakota. Thunderstorms in North Dakota also produced baseball size hail at Clifford which caused four million dollars damage, and high winds which toppled a couple of eighty foot towers cutting off power to the town of Blanchard. (The National Weather Summary) (Storm Data) ...1988... While cool air invaded the central U.S., unseasonably hot weather continued over the western states. The temperature at Spring Valley NV soared from a morning low of 35 degrees to an afternoon high of 95 degrees. Fallon NV reported an all-time record high of 108 degrees, and Death Valley CA reported their sixth straight day of 120 degree heat. (The Weather Channel) (The National Weather Summary) ...1989... Afternoon thunderstorms over Florida produced wind gusts to 92 mph at Jacksonville, damaging thirteen light planes at Herlong Field. Five cities in Texas reported record low temperatures for the date. Corpus Christi TX equalled their record low for the date with a reading of 71 degrees, and then tied their record high for the date that afternoon with a reading of 97 degrees. (The National Weather Summary) (Storm Data) ...2006... After two week's of very hot weather conditions in Kentucky, cool air from Canada moved into the Bluegrass state and provided temperatures in the upper 70's and low 80's. (UKAWC) Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky | ||||||||||