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Hamilton County, IA Weather and Climate Synopsis

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US Weekly Rainfall Departure



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A joint service of the UK Ag Weather Center and the National Weather Service.


Weather Summary for Iowa
National Weather Service Des Moines IA
346 AM CST Tue Dec 31 2024

Today: 

Low pressure moving from Missouri into Central Illinois overnight
produced a broad area of light rain and snow across central and
southern Iowa early this morning. There were spotty areas of snow
accumulations with a few areas receiving around an inch or so.
Most primary roads and highways remained wet although less traveled
roads did become slushy in areas. Otherwise, northwest winds increased
and were common from 10 to 20 mph with gusts to almost 30 mph at 
times. 

The light precipitation is expected to come to an end this morning as
the system pulls away from the state. Some minor snow accumulations,
generally less than an inch remain possible in far south central to
southeast Iowa through mid morning, otherwise the north winds persist
for much of the day as cooler air arrives. Additional flurries are
expected late this afternoon into the evening as another weak system
passes through the state. 

Tonight and beyond: 

Any flurries are forecast to end tonight with clearing expected toward
daybreak on New Years Day. Mostly sunny skies will greet the New Year
with near normal temperatures in the mid 20s to lower 30s. However,
a clipper system approaches the state on Thursday with light snow
overspreading much of central into southern Iowa. Minor accumulations
are forecast by Thursday evening along with the arrival of cooler air.
Highs by Friday are forecast to remain in the teens to lower 20s over
much of the state as cold polar air overspread the Midwest. 

National Ag. Weather Outlook, International Ag. Weather Summary
Current Surface Map, [2nd Source TWC]

Precision Agriculture Weather Forecast For HAMILTON County


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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 Temperatures, Dewpoint, RH, Wind, Regional Obs, Surface 4-Panel


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.

US Radar, All NWS Radars (In near-real time), Current Livestock Heat Stress Index (LSI), Current Wind Chill Map
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.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For HAMILTON County, IA
233 AM CDT Tue Jul 21 2026

TODAY
Mostly sunny. Cooler with highs around 80. Northwest winds 5 to 10 mph, increasing to 15 to 20 mph with gusts up to 30 mph.

TONIGHT
Mostly clear. Lows in the upper 50s. North winds 10 to 15 mph.

WEDNESDAY
Mostly sunny. Highs in the upper 70s. North winds around 5 mph.

WEDNESDAY NIGHT
Mostly clear. Lows in the mid 50s. East winds around 5 mph, becoming southeast around 5 mph after midnight.

THURSDAY
Mostly sunny. Highs in the upper 70s. South winds 5 to 10 mph.

THURSDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Lows around 60. Chance of rain 30 percent.

FRIDAY
Mostly sunny. A slight chance of showers in the morning. Highs in the upper 70s. Chance of rain 20 percent.

FRIDAY NIGHT
Partly cloudy. Lows in the lower 60s.

SATURDAY
Sunny. Highs in the upper 80s.

SATURDAY NIGHT
Mostly clear. Lows in the upper 60s.

SUNDAY
Sunny, hot with highs in the mid 90s. Heat index values up to 100 in the afternoon.

SUNDAY NIGHT
Partly cloudy. Lows in the upper 60s. Heat index values up to 100 early in the evening.

MONDAY
Sunny. Highs in the lower 90s.

12-48 Hr Surface Forecast Maps, TWC 4-Panel Surface Forecast, Fire Danger, Day 1 Precip, Day 2 Precip, Days 1-5 Precip, Severe Weather Pot.-Day 1, Day 2


Medium & Long Range Outlook For Iowa
                                 IOWA                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   JUL 26-30 JUL 28-AUG 3    JUN       JUN-AUG                      
                 -----------  -----------  --------  ---------
   Temperature:      Above        Above                                            
 Precipitation:      Below        Below                                            

....  Medium and long range outlooks provided by NCEP/K. Thomas Priddy
5 Day Rainfall Forecast, 6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook
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