Union County Weather and Climate Synopsis



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36 Hr. Forecast Map
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Satellite images from NOAA

Weather Summary

Hourly Observations

Nowcast

Precision Ag., Lawn & Garden Guidance

7 Day Forecast

Medium & Long Range Outlook

Almanac

Historical Facts


US Weekly Rainfall Departure		US Weekly Temperature 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 UNION County

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Regional Hourly Observations For UNION County
Issued at 500 AM CDT MON JUN 08 2026

SOUTHWEST IOWA CITY SKY/WX TMP DP RH WIND PRES REMARKS ATLANTIC * PTCLDY 70 70 100 E5 29.78S TC 21 AUDUBON * MOCLDY 68 66 94 S3 29.81R TC 20 CLARINDA * CLOUDY 70 70 100 CALM 29.81R TC 21 COUNCIL BLFS * CLOUDY 70 70 100 SE5 29.77S TC 21 CRESTON * CLOUDY 70 70 100 SE6 29.82R TC 21 HARLAN * CLOUDY 70 70 100 SE6 29.79S TC 21 LAMONI CLOUDY 69 68 96 CALM 29.82R TC 21 RED OAK * CLOUDY 70 70 100 SE6 29.78R TC 21 SHENANDOAH * CLOUDY 70 70 100 SE5 29.76R TC 21

Current Temperatures, Dewpoint, RH, Wind, Regional Obs, Surface 4-Panel
Current Agricultural Weather Conditions in Iowa
Based on observations at 500am CDT, Monday June 08, 2026

Across Iowa...temperatures are near 68 degrees west, near 71 degrees central, and near 70 degrees east. Current sky conditions are mostly cloudy west, cloudy central, and light rain east. In the west, relative humidity is near 96%, and the dew point is near 67 degrees. In the central part of the state, relative humidity is near 90%, and the dew point is near 68 degrees. In the east, relative humidity is near 97%, and the dew point is near 69 degrees. The livestock heat stress category is no stress west, no stress central, and no stress east. There is patchy fog east. Winds are from the south at 5 mph west, where conditions are favorable for spraying. Winds are from the southeast at 5 mph central, where conditions are favorable for spraying. Winds are from the east at 7 mph east, where conditions are not favorable for spraying due to light rain. Based on current available observations, the highest temperature is 72 degrees at Burlington. The lowest temperature is 66 degrees at Storm Lake.

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 UNION County,IA

504 AM CDT Mon Jun 8 2026 DAY ONE Today and tonight Scattered showers and isolated non-severe thunderstorms persist this morning generally east of I-35. Although the overall chance for flooding this morning is low, pockets of heavy rain remain possible and could lead to renewed flooding in areas of southern Iowa that received heavy rain in the last few days. DAYS TWO THROUGH SEVEN Tuesday through Sunday There are several chances for thunderstorms, some severe, at times from late Tuesday through Thursday. Stay weather aware this week. Heat builds into Tuesday with heat indices near to over 100 in much of the southwest half of the state. SPOTTER INFORMATION STATEMENT Spotter activation will not be needed today but rainfall reports are always appreciated.
NWS Severe Weather Map , Convective Outlook

7-Day Forecast For UNION County, IA
548 AM CDT Mon Jun 8 2026 TODAY
Mostly cloudy this morning, then becoming mostly sunny. Highs in the mid 80s. South winds around 5 mph, becoming west this afternoon.
TONIGHT
Partly cloudy. Humid with lows in the upper 60s. South winds around 5 mph.
TUESDAY
Partly sunny. Humid with highs around 90. South winds 10 to 15 mph. Heat index values up to 103 in the afternoon.
TUESDAY NIGHT
Partly cloudy. A slight chance of showers and thunderstorms in the evening. Humid with lows in the mid 70s. South winds 15 to 20 mph. Chance of rain 20 percent. Heat index values up to 104 early in the evening.
WEDNESDAY
Mostly sunny. Showers likely with a chance of thunderstorms in the afternoon. Breezy with highs around 90. South winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 60 percent.
WEDNESDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the mid 60s. Chance of rain 70 percent.
THURSDAY
Mostly sunny with a chance of showers. A chance of thunderstorms, mainly in the morning. Highs in the mid 80s. Chance of rain 50 percent.
THURSDAY NIGHT
Mostly clear. Lows around 60.
FRIDAY
Sunny. A slight chance of showers in the afternoon. Highs in the mid 80s. Chance of rain 20 percent.
FRIDAY NIGHT
Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Chance of rain 40 percent.
SATURDAY
Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent.
SATURDAY NIGHT
Mostly cloudy. A chance of showers and thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 50 percent.
SUNDAY
Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 20 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 JUN 13-17 JUN 15-21 JUN JUN-AUG ----------- ----------- -------- --------- Temperature: Below Below 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

//////////////////////////// JUNE 8TH...HISTORIC WEATHER EVENTS ...1953... The worst tornado of record for the state of Michigan killed 116 persons. Flint MI was hardest hit. The tornado, half a mile in width, destroyed 200 homes on Coldwater Road killing entire families. (The Weather Channel) ...1966... A tornado ripped right through the heart of the capitol city of Topeka KS killing sixteen persons and causing 100 million dollars damage. The tornado, which struck during the evening, cut a swath of near total destruction eight miles long and four blocks wide. It was the most destructive tornado of record up until that time. (David Ludlum) ...1974... Severe thunderstorms spawned at least twenty-three tornadoes in Oklahoma during the afternoon and evening hours. One of the tornadoes struck the town Drumright killing sixteen persons and injuring 150 others. A tornado struck the National Weather Service office in Oklahoma City, and two tornadoes hit the city of Tulsa. Thunderstorms in Tulsa also produced as much as ten inches of rain. Total damage from the storms was around thirty million dollars. It was the worst natural disaster of record for Tulsa. (Storm Data)

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