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Linn County, IA Weather and Climate Synopsis

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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 LINN County


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Regional Hourly Observations For LINN County
Issued at 200 PM CDT SUN JUL 20 2025

   NORTHEAST IOWA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CEDAR RAPIDS   PTSUNNY   81  72  74 E5        29.97S HX  85  TC  27   
CHARLES CITY * CLOUDY    73  72  94 E10       30.00R TC  23           
CLINTON *      PTSUNNY   79  72  79 E6        29.99R HX  82  TC  26   
DECORAH *      CLOUDY    73  68  83 E7        30.00R TC  23           
DUBUQUE        LGT RAIN  71  69  93 NE10      30.02R FOG     TC  22   
MONTICELLO *   PTSUNNY   81  73  78 S6        29.97R HX  85  TC  27   
OELWEIN *      CLOUDY    73  72  94 E10       30.00R TC  23           
WATERLOO       PTSUNNY   82  69  64 NW3       29.95F HX  85  TC  28

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

Current Agricultural Weather Conditions in Iowa
Based on observations at 200pm CDT, Sunday July 20, 2025

Across Iowa...temperatures are near 80 degrees west, near 84 degrees central, and near 80 degrees east. Current sky conditions are cloudy west, partly sunny central, and partly sunny east. In the west, relative humidity is near 79%, and the dew point is near 73 degrees. The heat index is near 84 degrees west. In the central part of the state, relative humidity is near 69%, and the dew point is near 73 degrees. The heat index is near 90 degrees central. In the east, relative humidity is near 79%, and the dew point is near 73 degrees. The heat index is near 84 degrees east. The livestock heat stress category is no stress west, danger central, and no stress east. Winds are from the southeast at 6 mph west, where conditions are favorable for spraying. Winds are from the southeast at 7 mph central, where conditions are favorable for spraying. Winds are calm east, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 86 degrees at Clarinda. The lowest temperature is 71 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.

US Radar, All NWS Radars (In near-real time), Current Livestock Heat Stress Index (LSI), Current Wind Chill Map
Hazardous Weather Outlook For LINN County,IA 

314 AM CDT Sun Jul 20 2025

 DAY ONE  TODAY AND TONIGHT

Showers and thunderstorms continue this morning with heavy
rainfall and a chance for flash flooding possible through midday.
A flood watch remains in effect due to potential for training
thunderstorms this morning.

 DAYS TWO THROUGH SEVEN  MONDAY THROUGH SATURDAY

Multiple chances for showers and storms exist this week with the
best chance for more widespread rainfall next weekend. Depending
on time between heavy rain events, some areas may remain
susceptible to flooding due to saturated ground conditions. Warm
temperatures are also expected beginning Tuesday and persisting 
throughout the week.

 SPOTTER INFORMATION STATEMENT  

Spotter activation may be needed this morning.

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For LINN County, IA
1227 PM CDT Sun Jul 20 2025

THIS AFTERNOON
Partly sunny with isolated showers. Near steady temperature in the upper 70s. East winds 5 to 10 mph. Chance of rain 20 percent.

TONIGHT
Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the mid 60s. East winds 5 to 10 mph with gusts up to 25 mph.

MONDAY
Partly sunny. Humid with highs in the lower 80s. East winds 5 to 10 mph.

MONDAY NIGHT
Mostly cloudy. Humid with lows around 70. Southeast winds 5 to 10 mph.

TUESDAY
Mostly cloudy in the morning, then becoming mostly sunny. Humid with highs in the upper 80s. Southeast winds 5 to 10 mph.

TUESDAY NIGHT THROUGH WEDNESDAY NIGHT
Mostly clear. Hot. Lows in the lower 70s. Highs in the lower 90s. Heat index values up to 105.

THURSDAY
Sunny. A chance of showers and thunderstorms in the afternoon. Hot with highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100.

THURSDAY NIGHT AND FRIDAY
Partly cloudy. A chance of showers and thunderstorms. Lows around 70. Highs in the upper 80s. Chance of rain 40 percent.

FRIDAY NIGHT AND SATURDAY
Partly cloudy. A chance of showers and thunderstorms. Lows around 70. Highs in the upper 80s. Chance of rain 30 percent.

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 25-29 JUL 27-AUG 2    JUN       JUN-AUG                      
                 -----------  -----------  --------  ---------
   Temperature:      Above        Above                                            
 Precipitation:     Normal       Normal                                            

....  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 20TH...HISTORIC WEATHER EVENTS
...1930...
The temperature at Washington D.C. soared to an all-time record of 106
degrees. The next day Millsboro reached 110 degrees to set a record for the
state of Delaware. July 1930 was one of the hottest and driest summers in
the U.S., particularly in the Missouri Valley where severe drought
conditions developed. Toward the end of the month state records were set
for Kentucky with 114 degrees, and Mississippi with 115 degrees. (David
Ludlum)
...1934...
The temperature at Keokuk IA soared to 118 degrees to establish a state
record. (The Weather Channel)
...1953...
Twenty-two inches of hail reportedly fell northeast of Dickinson ND. (The
Weather Channel)
...1986...
The temperature at Charleston SC hit 104 degrees for the second day in a
row to tie their all-time record high. (The Weather Channel)
...1987...
Thunderstorms produced severe weather across Minnesota, Wisconsin and
Michigan. Thunderstorms produced wind gusts to 87 mph at Mosinee WI, and
strong thunderstorm winds capsized twenty-six boats on Grand Traverse Bay
drowning two women. Thunderstorms produced nine inches of rain at Shakopee
MN, with 7.83 inches reported in six hours at Chaska MN. Thunderstorms in
north central Nebraska produced hail as large as golf balls in southwestern
Cherry County, which accumulated to a depth of 12 inches. (The National
Weather Summary) (Storm Data)
...1988...
The temperature at Redding CA soared to an all-time record high of 118
degrees. Showers and thunderstorms produced much needed rains from New
England to southern Texas. Salem IN was deluged with 7.2 inches of rain
resulting in flash flooding. (The National Weather Summary)
...1989...
Showers and thunderstorms in the Middle Atlantic Coast Region soaked
Wilmington DE with 2.28 inches of rain, pushing their total for the period
May through July past the previous record of 22.43 inches. Heavy rain over
that three month period virtually wiped out a 16.82 inch deficit which had
been building since drought conditions began in 1985. Thunderstorms in
central Indiana deluged Lebanon with 6.50 inches of rain in twelve hours,
and thunderstorms over Florida produced wind gusts to 84 mph at Flagler
Beach. (The National Weather Summary) (Storm Data)

Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky