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State Forecast for
Cedar Rapids , IA
Change Zip Code:
240
FPUS63 KDMX 182120
SFTIA
IAZ001>099-191000-
Tabular State Forecast for Iowa
National Weather Service Des Moines IA
420 PM CDT Tue Aug 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
FCST
FCST
FCST
FCST
FCST
FCST
FCST
Wed
Thu
Fri
Sat
Sun
Mon
Tue
Aug 19
Aug 20
Aug 21
Aug 22
Aug 23
Aug 24
Aug 25
...WESTERN IOWA...
Spencer
Ptcldy
Sunny
Sunny
Sunny
Mocldy
Ptcldy
Ptcldy
57/79
57/82
60/82
58/79
55/77
57/81
60/83
30/20
10/40
40/10
20/20
10/20
20/20
10/10
Sioux City
Ptcldy
Sunny
Sunny
Sunny
Mocldy
Ptcldy
Ptcldy
63/78
60/83
62/83
61/79
60/77
61/80
63/82
10/30
20/10
40/10
20/20
20/20
20/20
10/10
Carroll
Ptcldy
Sunny
Sunny
Sunny
Mocldy
Ptcldy
Ptcldy
63/79
59/82
64/84
62/80
59/77
61/81
63/83
20/30
20/20
30/30
20/20
10/20
20/20
20/10
Atlantic
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
65/78
61/81
64/83
64/80
61/78
63/81
64/82
20/40
20/10
20/20
30/30
10/30
20/20
10/10
Shenandoah
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
68/82
63/85
67/87
67/86
65/83
67/86
68/87
20/30
20/00
20/10
30/30
10/30
30/20
10/10
...CENTRAL IOWA...
Mason City
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Sunny
58/78
58/80
61/81
60/77
55/75
58/78
61/81
30/00
10/20
40/30
20/20
00/10
20/20
10/10
Fort Dodge
Ptcldy
Ptcldy
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
61/80
59/82
63/83
62/80
58/77
60/81
63/83
20/10
10/20
40/40
20/20
10/20
20/20
10/10
Ames
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
64/80
60/82
64/84
64/80
60/78
61/81
64/83
20/10
10/10
30/30
20/20
10/20
20/20
10/10
Marshalltown
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
62/79
58/80
63/82
62/79
57/76
59/79
61/81
20/10
10/10
20/20
20/20
00/20
20/20
10/10
Des Moines
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
67/79
63/82
67/83
65/80
62/77
64/81
66/83
20/10
10/00
30/30
20/20
10/20
20/20
10/10
Creston
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
66/80
62/82
66/85
66/83
62/80
64/83
66/85
20/40
20/00
10/10
30/30
10/30
30/30
10/10
Lamoni
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
67/80
63/82
65/85
66/83
63/80
65/83
66/84
20/40
30/00
10/10
30/30
10/20
30/30
10/10
...EASTERN IOWA...
Decorah
Ptcldy
Sunny
Ptcldy
Sunny
Ptcldy
Ptcldy
Ptcldy
60/77
57/78
62/79
61/77
57/74
58/76
61/80
50/00
00/20
50/50
40/10
00/10
10/20
10/10
Oelwein
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
61/76
59/77
63/79
62/76
58/73
59/75
62/78
50/00
10/10
50/50
20/20
00/10
20/20
10/10
Waterloo
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
62/78
58/80
64/81
62/78
58/75
60/78
62/80
40/10
10/10
30/30
20/20
00/10
20/20
10/10
Dubuque
Ptcldy
Sunny
Ptcldy
Sunny
Ptcldy
Ptcldy
Ptcldy
64/78
59/79
63/80
63/78
59/75
60/77
62/80
50/10
00/00
30/30
30/20
00/10
20/20
20/10
Cedar Rapids
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
64/81
59/81
63/82
63/80
59/77
60/80
63/82
40/10
10/00
20/30
30/20
00/10
20/20
20/10
Iowa City
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
65/81
60/82
64/83
64/81
61/78
61/80
64/82
40/10
10/00
20/30
30/20
00/10
20/20
20/10
Quad Cities
Ptcldy
Sunny
Ptcldy
Sunny
Ptcldy
Ptcldy
Ptcldy
65/80
60/81
63/81
64/79
60/77
60/79
63/81
40/10
10/00
20/30
30/20
20/10
10/20
20/10
Ottumwa
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
66/81
62/82
65/85
65/82
61/79
63/82
65/84
30/20
10/00
10/20
30/30
00/20
20/20
10/10
Burlington
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
67/80
61/80
63/82
64/80
61/77
61/80
64/81
30/30
20/00
10/20
30/20
00/10
20/20
10/10
Keokuk
Ptcldy
Sunny
Sunny
Sunny
Ptcldy
Ptcldy
Ptcldy
68/79
63/80
64/83
66/81
62/78
63/80
66/82
30/30
10/00
10/20
30/20
00/10
20/20
10/10
$$
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Bryce Anderson
–
DTN Meteorologist
Bio
Front Continues to Push Through Corn Belt Wednesday
» More DTN Weather Commentary
Posted at 11:59AM Tue Aug 18, 2026 CDT
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