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Day 1 Outlook • April 17, 2026
Day 2 Outlook • April 18, 2026
Day 3 Outlook • April 19, 2026
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dBZ 5
75

Hazardous Weather Conditions

  • No active alerts for SAINT CLAIR, MISSOURI

Current Conditions: SAINT CLAIR, MISSOURI

WASHINGTON (KFYG)

Haze

80.6 F
Humidity:66%
Wind Speed: 10.3 mph
Barometer:29.85 in
Dewpoint:68.0 F
Visibility:6.00 mi
Precip:--
Heat Index:83.3 F
Wind Chill:NA
Apr 17 2026, 11:55 AM CDT
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5 Day Forecast for SAINT CLAIR, MISSOURI (63077)

Friday

High 86 °F
Mostly Cloudy
Friday
Night
Low 46 °F
T-storms
Saturday

High 60 °F
Chance of Rain Showers
Saturday
Night
Low 37 °F
Clear
Sunday

High 68 °F
Sunny
Sunday
Night
Low 42 °F
Clear
Monday

High 75 °F
Sunny
Monday
Night
Low 53 °F
Mostly Clear
Tuesday

High 77 °F
Mostly Sunny

Detailed Forecast for SAINT CLAIR, MISSOURI (63077)

Friday
Mostly Cloudy. High near 86°F. Wind 5 to 10 mph, with gusts as high as 23 mph.
Friday Night
Thunderstorms. Low around 46°F. Wind 7 to 9 mph, with gusts as high as 22 mph.
Saturday
Chance of Rain Showers. High near 60°F. Wind 7 to 10 mph, with gusts as high as 23 mph.
Saturday Night
Clear. Low around 37°F. Wind 2 to 5 mph, with gusts as high as 14 mph.
Sunday
Sunny. High near 68°F. Wind 2 to 8 mph, with gusts as high as 20 mph.
Sunday Night
Clear. Low around 42°F. Wind around 1 mph, with gusts as high as 7 mph.
Monday
Sunny. High near 75°F. Wind 3 to 5 mph, with gusts as high as 14 mph.
Monday Night
Mostly Clear. Low around 53°F. Wind around 5 mph, with gusts as high as 16 mph.
Tuesday
Mostly Sunny. High near 77°F. Wind 5 to 9 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly Clear. Low around 55°F. Wind around 5 mph, with gusts as high as 14 mph.
Wednesday
Partly Sunny. High near 80°F. Wind 3 to 6 mph, with gusts as high as 15 mph.
Wednesday Night
Mostly Clear. Low around 57°F. Wind around 3 mph, with gusts as high as 14 mph.
Thursday
Chance of Scattered Thunderstorms. High near 80°F. Wind 6 to 8 mph, with gusts as high as 18 mph.
MO Radar
Current Radar • MO
Day 1 Outlook • April 17, 2026

Observation History for SAINT CLAIR, MISSOURI

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
11:55 AM CDT 10.3 6.00 Haze -- 80.6 68.0 66% NA 83.3 29.85 1010.8
11:15 AM CDT S 10.3 4.00 Haze -- 80.6 68.0 66% NA 83.3 29.87 1011.5
10:55 AM CDT G 19.7 4.00 Haze -- 78.8 68.0 70% NA 79.7 29.87 1011.5
10:35 AM CDT 4.00 Haze -- 77.0 68.0 74% NA 77.9 29.87 1011.5
10:15 AM CDT 4.00 Haze -- NULL % NA NA M
09:55 AM CDT 10.3 4.00 Haze -- 75.2 68.0 78% NA 76.1 29.88 1011.9
09:35 AM CDT SE 8.1 4.00 Haze -- 73.4 66.2 78% NA 74.1 29.89 1012.2
09:15 AM CDT SE 10.3 5.00 Haze -- 71.6 66.2 83% NA 72.3 29.89 1012.2
08:55 AM CDT SE 8.1 5.00 Fog/Mist -- 69.8 66.2 88% NA NA 29.89 1012.2
08:35 AM CDT SE 9.2 5.00 Fog/Mist -- 68.0 66.2 94% NA NA 29.89 1012.2
08:15 AM CDT SE 9.2 4.00 Fog/Mist -- 68.0 64.4 88% NA NA 29.90 1012.5
07:55 AM CDT SE 8.1 5.00 Fog/Mist -- 66.2 64.4 94% NA NA 29.90 1012.5
07:35 AM CDT SE 8.1 4.00 Fog/Mist -- 66.2 64.4 94% NA NA 29.90 1012.5
07:15 AM CDT SE 6.9 4.00 Fog/Mist -- 66.2 64.4 94% NA NA 29.89 1012.2
06:55 AM CDT 0.0 5.00 Fog/Mist -- 64.4 64.4 100% NA NA 29.89 1012.2
06:35 AM CDT SE 5.8 6.00 Fog/Mist -- 64.4 64.4 100% NA NA 29.89 1012.2
06:15 AM CDT 6.00 NULL -- NULL % NA NA M
05:55 AM CDT SE 6.9 6.00 Fog/Mist -- 64.4 64.4 100% NA NA 29.89 1012.2
05:35 AM CDT SE 6.9 6.00 Fog/Mist -- 66.2 64.4 94% NA NA 29.89 1012.2
05:15 AM CDT SE 6.9 6.00 Fog/Mist -- 66.2 66.2 100% NA NA 29.89 1012.2
04:55 AM CDT SE 5.8 5.00 Fog/Mist -- 66.2 66.2 100% NA NA 29.89 1012.2
04:35 AM CDT SE 8.1 6.00 Fog/Mist -- 66.2 66.2 100% NA NA 29.88 1011.9
04:15 AM CDT 6.9 9.00 Clear -- 66.2 66.2 100% NA NA 29.88 1011.9
03:55 AM CDT 0.0 6.00 Fog/Mist -- 66.2 66.2 100% NA NA 29.88 1011.9

Regional Weather Observation

WASHINGTON (KFYG)

Haze
80.6 F

VICHY/ROLLA (KVIH)

Clear
78.1 F

ST LOUIS/SPIRIT (KSUS)

Partly Cloudy
81.0 F

ST LOUIS (KSTL)

Mostly Cloudy
81.0 F

ST CHARLES (KSET)

Partly Cloudy
80.6 F

CAHOKIA/ST LOUIS (KCPS)

Clear
80.6 F
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