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State Forecast for Washington , IA
Change Zip Code: 
 
946
FPUS63 KDMX 182120
SFTIA
IAZ001>099-191000-
Tabular State Forecast for Iowa
National Weather Service Des Moines IA
420 PM CDT Mon May 18 2026
ROWS INCLUDE...
Daily predominant daytime weather 6AM-6PM
Forecast temperatures...early morning low/daytime high
Probability of precipitation nighttime 6PM-6AM/daytime 6AM-6PM
- indicates temperatures below zero
MM indicates missing data
 
FCSTFCSTFCSTFCSTFCSTFCSTFCST
TueWedThuFriSatSunMon
May 19May 20May 21May 22May 23May 24May 25
...WESTERN IOWA...
Spencer
MocldyPtcldyMocldyMocldyPtcldyPtcldyPtcldy
44/5733/6140/6241/6344/7149/8155/86
80/1000/0000/2030/6060/3010/1020/10
Sioux City
PtcldyPtcldyMocldyMocldyMocldyPtcldyPtcldy
44/6134/6242/6243/6545/7449/8355/87
80/1000/0010/3040/6050/3010/1020/10
Carroll
MocldyPtcldyMocldyTstrmsMocldyPtcldyPtcldy
47/5939/6043/6145/6447/7351/8157/86
90/1000/0000/4060/6050/2020/2010/10
Atlantic
MocldyPtcldyShwrsTstrmsPtcldyPtcldyPtcldy
48/6040/5944/6047/6448/7353/8158/84
90/1000/0010/6070/7040/2020/2020/10
Shenandoah
PtcldyPtcldyMocldyMocldyPtcldyPtcldyPtcldy
49/6241/6145/6249/6750/7554/8160/85
90/1000/0030/6070/7030/2020/2020/10
...CENTRAL IOWA...
Mason City
MocldySunnyMocldyShwrsPtcldyPtcldyPtcldy
49/5737/6042/6042/6244/7148/7953/84
80/3000/0000/2040/5050/3020/2020/10
Fort Dodge
MocldyPtcldyMocldyTstrmsPtcldyPtcldyPtcldy
48/5939/6145/6246/6446/7351/8156/86
80/2000/0000/3050/5050/2020/2010/10
Ames
MocldyPtcldyMocldyTstrmsPtcldyPtcldyPtcldy
52/6141/6245/6246/6448/7452/8157/85
90/3000/0000/3060/6040/2010/1010/10
Marshalltown
MocldyPtcldyPtcldyShwrsPtcldyPtcldyPtcldy
53/6240/6143/6245/6347/7451/8056/85
80/3000/0000/3060/6040/2010/1020/10
Des Moines
MocldyPtcldyMocldyTstrmsPtcldyPtcldyPtcldy
52/6345/6247/6250/6551/7555/8160/85
90/3000/0010/3060/6040/2020/2010/10
Creston
MocldyPtcldyShwrsTstrmsPtcldyPtcldyPtcldy
50/6141/6045/6148/6549/7454/8059/84
90/2000/0010/5070/7040/2020/2020/10
Lamoni
MocldyPtcldyShwrsTstrmsPtcldyPtcldyPtcldy
53/6344/6146/6250/6651/7555/8060/84
90/2000/0010/5070/7030/2020/2020/20
...EASTERN IOWA...
Decorah
MocldySunnyPtcldyMocldyPtcldyPtcldyPtcldy
53/5942/6044/6046/6248/7053/7857/83
60/3000/0000/1040/5050/3020/1020/10
Oelwein
MocldySunnyPtcldyMocldyPtcldyPtcldyPtcldy
54/6141/6144/6144/6247/7152/7856/83
60/3000/0000/1050/5050/2010/1020/20
Waterloo
MocldySunnyPtcldyShwrsPtcldyPtcldyPtcldy
53/6241/6244/6345/6446/7351/8056/84
80/3000/0000/2050/5050/2010/1020/20
Dubuque
MocldySunnyPtcldyMocldyPtcldyPtcldyPtcldy
61/6745/6444/6446/6549/7353/7957/84
60/4000/0000/0040/6060/3020/2020/20
Cedar Rapids
MocldySunnyPtcldyMocldyPtcldyPtcldyPtcldy
60/6644/6445/6547/6549/7453/8158/85
80/3000/0000/1050/6060/1020/2020/20
Iowa City
MocldySunnyPtcldyMocldyPtcldyPtcldyPtcldy
61/6845/6445/6648/6550/7554/8158/86
80/3000/0000/2050/6060/1020/2020/20
Quad Cities
PtcldySunnyPtcldyMocldyPtcldyPtcldyPtcldy
62/7346/6644/6848/6651/7655/8260/86
60/2000/0000/1040/6060/2020/2020/20
Ottumwa
MocldySunnyPtcldyShwrsPtcldyPtcldyPtcldy
59/6545/6445/6650/6651/7656/8260/86
80/3000/0000/3060/7050/2020/2020/20
Burlington
MocldySunnyPtcldyMocldyMocldyPtcldyPtcldy
62/7348/6646/6950/6752/7655/8259/85
60/3000/0000/1050/7060/1020/2020/20
Keokuk
MocldySunnyPtcldyMocldyMocldyPtcldyPtcldy
62/7250/6648/6852/6754/7657/8161/84
70/2000/0000/1050/7060/2020/2020/20
$$
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DTN Weather Summary

Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Bio
Front Pushing through Southern Plains, Midwest Tuesday

A sharp cold front will trigger major severe weather Monday, with tornadoes, large hail, and heavy rain across the Plains and Midwest. » More DTN Weather Commentary
Posted at 12:39PM Mon May 18, 2026 CDT
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