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Father's Day forecast: See where thunderstorms could impact outdoor plans. Chevron right

St. Marys, IA

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St. Marys, IA Weather
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Winter Center
Today Hourly

Daily

 Radar MinuteCast Monthly Air Quality Health & Activities

June 14 - July 28

Sat 6/14

89° /68°
25%
Partly sunny

RealFeel®97°

RealFeel Shade™89°

Max UV Index11 (Extreme)

WindS 6 mph

Sun 6/15

86° /66°
55%
Cloudy with a thunderstorm in the afternoon

RealFeel®90°

RealFeel Shade™86°

Max UV Index6 (High)

WindSSE 8 mph

Mon 6/16

89° /68°
77%
Humid with clouds and sun; showers and a heavier t-storm in the p.m.; storms can bring flooding downpours, hail, damaging wind gusts, and an isolated tornado

RealFeel®97°

RealFeel Shade™92°

Max UV Index9 (Very High)

WindS 8 mph

Tue 6/17

84° /65°
91%
Cloudy, showers and a heavier t-storm, humid; breezy in the morning; storms can bring flooding downpours, hail, damaging wind gusts, and an isolated tornado

RealFeel®88°

RealFeel Shade™85°

Max UV Index4 (Moderate)

WindSW 12 mph

Wed 6/18

82° /62°
66%
A couple of showers and a thunderstorm in the morning; otherwise, humid with clouds yielding to sun; thunderstorms can be strong, perhaps severe

RealFeel®87°

RealFeel Shade™82°

Max UV Index11 (Extreme)

WindWNW 9 mph

Thu 6/19

84° /68°
1%
Mostly sunny and pleasant

RealFeel®90°

RealFeel Shade™88°

Max UV Index11 (Extreme)

WindNW 5 mph

Fri 6/20

90° /73°
12%
Humid with some sun

RealFeel®97°

RealFeel Shade™92°

Max UV Index11 (Extreme)

WindS 17 mph

Sat 6/21

89° /73°
2%
Uncomfortably humid with plenty of sun

RealFeel®98°

RealFeel Shade™95°

Max UV Index11 (Extreme)

WindSSW 17 mph

Sun 6/22

93° /72°
6%
Mostly sunny and hot

RealFeel®99°

RealFeel Shade™94°

Max UV Index11 (Extreme)

WindSSW 18 mph

Mon 6/23

87° /68°
64%
Considerable cloudiness with a couple of thunderstorms; humid

RealFeel®96°

RealFeel Shade™96°

Max UV Index7 (High)

WindSSW 12 mph

Tue 6/24

90° /70°
75%
Variable cloudiness with a couple of thunderstorms in the afternoon

RealFeel®95°

RealFeel Shade™91°

Max UV Index10 (Very High)

WindWSW 7 mph

Wed 6/25

88° /69°
25%
Humid with times of clouds and sun

RealFeel®100°

RealFeel Shade™95°

Max UV Index11 (Extreme)

WindSE 4 mph

Thu 6/26

89° /69°
39%
Partly sunny and humid with a shower in places

RealFeel®99°

RealFeel Shade™94°

Max UV Index9 (Very High)

WindSSE 6 mph

Fri 6/27

84° /62°
25%
Mostly sunny and less humid

RealFeel®91°

RealFeel Shade™83°

Max UV Index11 (Extreme)

WindSSE 6 mph

Sat 6/28

89° /69°
5%
Humid with plenty of sunshine

RealFeel®94°

RealFeel Shade™90°

Max UV Index11 (Extreme)

WindSSW 10 mph

Sun 6/29

88° /68°
5%
Humid with plenty of sunshine

RealFeel®93°

RealFeel Shade™90°

Max UV Index11 (Extreme)

WindSSW 14 mph

Mon 6/30

90° /69°
5%
Sunny and humid

RealFeel®96°

RealFeel Shade™91°

Max UV Index11 (Extreme)

WindSSW 10 mph

Tue 7/1

89° /69°
5%
Humid with plenty of sun

RealFeel®95°

RealFeel Shade™91°

Max UV Index11 (Extreme)

WindSSW 12 mph

Wed 7/2

89° /68°
25%
Mostly cloudy and humid

RealFeel®92°

RealFeel Shade™89°

Max UV Index3 (Moderate)

WindSSW 7 mph

Thu 7/3

90° /69°
5%
Plenty of sun

RealFeel®94°

RealFeel Shade™89°

Max UV Index11 (Extreme)

WindS 9 mph

Fri 7/4

89° /70°
25%
Humid with plenty of sunshine

RealFeel®94°

RealFeel Shade™90°

Max UV Index11 (Extreme)

WindSSW 10 mph

Sat 7/5

89° /69°
55%
Mostly cloudy and humid with a couple of showers, mainly early in the day

RealFeel®90°

RealFeel Shade™88°

Max UV Index3 (Moderate)

WindSSE 9 mph

Sun 7/6

90° /70°
25%
Very warm with times of clouds and sun

RealFeel®91°

RealFeel Shade™88°

Max UV Index3 (Moderate)

WindSSW 8 mph

Mon 7/7

91° /71°
20%
Mostly sunny and very warm

RealFeel®92°

RealFeel Shade™88°

Max UV Index10 (Very High)

WindSW 12 mph

Tue 7/8

91° /70°
20%
Partly sunny and remaining very warm

RealFeel®98°

RealFeel Shade™92°

Max UV Index10 (Very High)

WindW 6 mph

Wed 7/9

90° /69°
60%
A touch of rain in the morning; otherwise, mostly cloudy and humid

RealFeel®92°

RealFeel Shade™89°

Max UV Index9 (Very High)

WindENE 13 mph

Thu 7/10

88° /69°
25%
Humid with periods of clouds and sunshine

RealFeel®91°

RealFeel Shade™90°

Max UV Index5 (Moderate)

WindSE 10 mph

Fri 7/11

90° /71°
25%
Mostly sunny

RealFeel®95°

RealFeel Shade™92°

Max UV Index10 (Very High)

WindSSW 12 mph

Sat 7/12

89° /68°
25%
Clouds to start, then sunshine returns and very warm

RealFeel®94°

RealFeel Shade™89°

Max UV Index10 (Very High)

WindW 9 mph

Sun 7/13

90° /69°
25%
Decreasing clouds and humid

RealFeel®96°

RealFeel Shade™92°

Max UV Index10 (Very High)

WindESE 7 mph

Mon 7/14

91° /71°
10%
Sunny to partly cloudy, very warm and less humid

RealFeel®91°

RealFeel Shade™88°

Max UV Index10 (Very High)

WindSW 14 mph

Tue 7/15

92° /70°
25%
Cloudy and very warm

RealFeel®93°

RealFeel Shade™93°

Max UV Index3 (Moderate)

WindWNW 8 mph

Wed 7/16

90° /69°
25%
Remaining very warm with times of clouds and sun

RealFeel®89°

RealFeel Shade™87°

Max UV Index5 (Moderate)

WindENE 8 mph

Thu 7/17

88° /68°
20%
Sunshine and a few clouds

RealFeel®91°

RealFeel Shade™86°

Max UV Index10 (Very High)

WindNE 8 mph

Fri 7/18

88° /68°
20%
Partly sunny

RealFeel®92°

RealFeel Shade™86°

Max UV Index10 (Very High)

WindSE 5 mph

Sat 7/19

87° /67°
65%
A couple of morning showers and a thunderstorm; otherwise, clouds and breaks of sun

RealFeel®93°

RealFeel Shade™88°

Max UV Index4 (Moderate)

WindN 7 mph

Sun 7/20

83° /62°
10%
Sunny and less humid

RealFeel®89°

RealFeel Shade™80°

Max UV Index10 (Very High)

WindNW 5 mph

Mon 7/21

83° /62°
55%
Mostly sunny with a thundershower in the afternoon

RealFeel®84°

RealFeel Shade™79°

Max UV Index10 (Very High)

WindWSW 9 mph

Tue 7/22

84° /60°
20%
Mostly sunny

RealFeel®83°

RealFeel Shade™80°

Max UV Index10 (Very High)

WindNW 14 mph

Wed 7/23

79° /60°
25%
Sun giving way to increasing clouds

RealFeel®78°

RealFeel Shade™77°

Max UV Index7 (High)

WindNW 8 mph

Thu 7/24

80° /61°
20%
Mostly sunny

RealFeel®86°

RealFeel Shade™78°

Max UV Index10 (Very High)

WindN 2 mph

Fri 7/25

79° /62°
65%
Cloudy with a couple of showers and a thunderstorm in the afternoon

RealFeel®77°

RealFeel Shade™76°

Max UV Index2 (Low)

WindESE 7 mph

Sat 7/26

77° /62°
58%
Cloudy; a morning thundershower followed by a thunderstorm in the afternoon

RealFeel®76°

RealFeel Shade™76°

Max UV Index2 (Low)

WindENE 8 mph

Sun 7/27

80° /63°
57%
Remaining cloudy with a thunderstorm or two

RealFeel®81°

RealFeel Shade™81°

Max UV Index2 (Low)

WindE 5 mph

Mon 7/28

79° /60°
1%
Clouds and sun

RealFeel®85°

RealFeel Shade™78°

Max UV Index9 (Very High)

WindSE 4 mph

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World North America United States Iowa St. Marys

Weather Near St. Marys:

  • Ames, IA
  • Des Moines, IA
  • West Des Moines, IA
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