Heat Advisory · until 6:15 PM CDT

Heat Advisory

Moderate · Clinton; Washington; Randolph; Madison; St. Clair; Monroe; Boone; Moniteau; Cole; Osage; Callaway; Montgomery; Gasconade; Warren; St. Charles; Franklin; St. Louis; St. Louis City; Jefferson; Crawford; Washington; St. Francois; Ste. Genevieve; Iron; Madison; Reynolds

Heat Advisory issued July 18 at 3:04AM CDT until July 21 at 7:00PM CDT by NWS St Louis MO

Instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

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Units

St. Louis, Missouri weather · now

77°

Clear

Feels: 79°
High / Low: 94° / 75°
Wind: 17 mph SW
Humidity: 89%

No precipitation expected in the next 1.6 hours.

Precipitation · next 12 hrs

Peak 17% · 3 PM

4 AM

7 AM

10 AM

1 PM

3 PM

ModerateAir quality PollenTreeNoneGrassHighWeedLow

Sun 5:50 AM 8:23 PM 14h 32m

Moon Waxing Crescent 14% lit

Current weather and 7-day forecast for St. Louis, Missouri, sourced directly from the National Weather Service. Expect mostly sunny then slight chance showers and thunderstorms today. Today's high is 94° with a low near 75°. 1 active weather alert in effect.

What to wear today

Loose, light, and water nearby

94°F — wear breathable fabrics and stay hydrated.

Next 24 hours

4 AM

77°

2%
6 AM

75°

3%
8 AM

80°

3%
10 AM

86°

5%
12 PM

90°

11%
2 PM

93°

16%
4 PM

94°

17%
6 PM

92°

16%
8 PM

88°

8%
10 PM

84°

13%
12 AM

81°

16%
2 AM

78°

15%

Live radar

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7 days

Today 7/18 Mostly Sunny then Slight Chance Showers And Thunderstorms 17% 94° · 75°
1. 4 AM 77° Mostly Clear 2%
2. 5 AM 75° Mostly Clear 2%
3. 6 AM 75° Sunny 3%
4. 7 AM 77° Sunny 3%
5. 8 AM 80° Sunny 3%
6. 9 AM 83° Sunny 3%
7. 10 AM 86° Sunny 5%
8. 11 AM 89° Mostly Sunny 8%
9. 12 PM 90° Mostly Sunny 11%
10. 1 PM 92° Slight Chance Showers And Thunderstorms 15%
11. 2 PM 93° Slight Chance Showers And Thunderstorms 16%
12. 3 PM 94° Slight Chance Showers And Thunderstorms 17%
13. 4 PM 94° Slight Chance Showers And Thunderstorms 17%
14. 5 PM 93° Slight Chance Showers And Thunderstorms 16%
15. 6 PM 92° Slight Chance Showers And Thunderstorms 16%
16. 7 PM 90° Partly Cloudy 9%
17. 8 PM 88° Partly Cloudy 8%
18. 9 PM 86° Partly Cloudy 10%
19. 10 PM 84° Mostly Clear 13%
20. 11 PM 82° Slight Chance Showers And Thunderstorms 16%
Sun 7/19 Mostly Sunny then Chance Showers And Thunderstorms 44% 91° · 74°
1. 12 AM 81° Slight Chance Showers And Thunderstorms 16%
2. 1 AM 79° Slight Chance Showers And Thunderstorms 15%
3. 2 AM 78° Slight Chance Showers And Thunderstorms 15%
4. 3 AM 77° Mostly Clear 10%
5. 4 AM 76° Partly Cloudy 7%
6. 5 AM 76° Partly Cloudy 6%
7. 6 AM 76° Mostly Sunny 6%
8. 7 AM 76° Sunny 4%
9. 8 AM 80° Mostly Sunny 2%
10. 9 AM 82° Mostly Sunny 1%
11. 10 AM 86° Mostly Sunny 1%
12. 11 AM 88° Mostly Sunny 5%
13. 12 PM 89° Partly Sunny 14%
14. 1 PM 90° Chance Showers And Thunderstorms 35%
15. 2 PM 90° Chance Showers And Thunderstorms 41%
16. 3 PM 90° Chance Showers And Thunderstorms 44%
17. 4 PM 90° Chance Showers And Thunderstorms 39%
18. 5 PM 89° Chance Showers And Thunderstorms 37%
19. 6 PM 89° Chance Showers And Thunderstorms 30%
20. 7 PM 87° Slight Chance Showers And Thunderstorms 16%
21. 8 PM 85° Slight Chance Showers And Thunderstorms 16%
22. 9 PM 82° Slight Chance Showers And Thunderstorms 16%
23. 10 PM 80° Slight Chance Rain Showers 16%
24. 11 PM 79° Slight Chance Rain Showers 16%
Mon 7/20 Sunny 9% 95° · 78°
1. 12 AM 78° Slight Chance Rain Showers 16%
2. 1 AM 77° Mostly Clear 3%
3. 2 AM 76° Partly Cloudy 3%
4. 3 AM 75° Partly Cloudy 3%
5. 4 AM 75° Partly Cloudy 3%
6. 5 AM 74° Partly Cloudy 3%
7. 6 AM 74° Mostly Sunny 3%
8. 7 AM 74° Mostly Sunny 2%
9. 8 AM 77° Mostly Sunny 2%
10. 9 AM 80° Sunny 2%
11. 10 AM 84° Sunny 2%
12. 11 AM 87° Sunny 2%
13. 12 PM 89° Sunny 2%
14. 1 PM 91° Sunny 7%
15. 2 PM 93° Sunny 7%
16. 3 PM 94° Sunny 7%
17. 4 PM 95° Sunny 7%
18. 5 PM 94° Sunny 7%
19. 6 PM 93° Mostly Clear 7%
20. 7 PM 92° Mostly Clear 6%
21. 8 PM 89° Mostly Clear 6%
22. 9 PM 86° Mostly Clear 6%
23. 10 PM 84° Mostly Clear 6%
24. 11 PM 83° Mostly Clear 6%
Tue 7/21 Sunny 9% 96° · 71°
1. 12 AM 82° Mostly Clear 6%
2. 1 AM 81° Mostly Clear 9%
3. 2 AM 80° Mostly Clear 9%
4. 3 AM 79° Mostly Clear 9%
5. 4 AM 79° Mostly Clear 9%
6. 5 AM 78° Mostly Clear 9%
7. 6 AM 78° Sunny 9%
8. 7 AM 78° Sunny 8%
9. 8 AM 81° Sunny 8%
10. 9 AM 85° Sunny 8%
11. 10 AM 88° Sunny 8%
12. 11 AM 90° Sunny 8%
13. 12 PM 92° Sunny 8%
14. 1 PM 93° Sunny 9%
15. 2 PM 94° Sunny 9%
16. 3 PM 95° Sunny 9%
17. 4 PM 95° Sunny 9%
18. 5 PM 95° Sunny 9%
19. 6 PM 93° Mostly Clear 9%
20. 7 PM 91° Mostly Clear 4%
21. 8 PM 88° Mostly Clear 4%
22. 9 PM 85° Mostly Clear 4%
23. 10 PM 82° Mostly Clear 4%
24. 11 PM 80° Mostly Clear 4%
Wed 7/22 Sunny 2% 86° · 66°
1. 12 AM 78° Mostly Clear 4%
2. 1 AM 76° Mostly Clear 1%
3. 2 AM 75° Mostly Clear 1%
4. 3 AM 74° Mostly Clear 1%
5. 4 AM 73° Mostly Clear 1%
6. 5 AM 72° Mostly Clear 1%
7. 6 AM 71° Sunny 1%
8. 7 AM 71° Sunny
9. 8 AM 73° Sunny
10. 9 AM 75° Sunny
11. 10 AM 78° Sunny
12. 11 AM 80° Sunny
13. 12 PM 82° Sunny
14. 1 PM 83° Sunny
15. 2 PM 84° Sunny
16. 3 PM 85° Sunny
17. 4 PM 85° Sunny
18. 5 PM 85° Sunny
19. 6 PM 84° Mostly Clear
20. 7 PM 83° Mostly Clear 2%
21. 8 PM 81° Mostly Clear 2%
22. 9 PM 78° Mostly Clear 2%
23. 10 PM 75° Mostly Clear 2%
24. 11 PM 73° Mostly Clear 2%
Thu 7/23 Mostly Sunny 22% 83° · 66°
1. 12 AM 71° Mostly Clear 2%
2. 1 AM 70° Mostly Clear 2%
3. 2 AM 69° Mostly Clear 2%
4. 3 AM 68° Mostly Clear 2%
5. 4 AM 67° Mostly Clear 2%
6. 5 AM 66° Mostly Clear 2%
7. 6 AM 66° Sunny 2%
8. 7 AM 67° Mostly Sunny 4%
9. 8 AM 69° Mostly Sunny 4%
10. 9 AM 72° Mostly Sunny 4%
11. 10 AM 75° Mostly Sunny 4%
12. 11 AM 77° Mostly Sunny 4%
13. 12 PM 79° Mostly Sunny 4%
14. 1 PM 80° Mostly Sunny 4%
15. 2 PM 81° Mostly Sunny 4%
16. 3 PM 82° Mostly Sunny 4%
17. 4 PM 82° Mostly Sunny 4%
18. 5 PM 82° Mostly Sunny 4%
19. 6 PM 81° Partly Cloudy 4%
20. 7 PM 80° Partly Cloudy 5%
21. 8 PM 78° Partly Cloudy 5%
22. 9 PM 75° Partly Cloudy 5%
23. 10 PM 73° Partly Cloudy 5%
24. 11 PM 72° Partly Cloudy 5%
Fri 7/24 Slight Chance Rain Showers 23% 85° · —
1. 12 AM 71° Partly Cloudy 5%
2. 1 AM 70° Slight Chance Rain Showers 22%
3. 2 AM 69° Slight Chance Rain Showers 22%
4. 3 AM 69° Slight Chance Rain Showers 22%
5. 4 AM 68° Slight Chance Rain Showers 22%
6. 5 AM 67° Slight Chance Rain Showers 22%
7. 6 AM 66° Slight Chance Rain Showers 22%
8. 7 AM 67° Slight Chance Rain Showers 23%
9. 8 AM 69° Slight Chance Rain Showers 23%
10. 9 AM 73° Slight Chance Rain Showers 23%
11. 10 AM 76° Slight Chance Rain Showers 23%
12. 11 AM 78° Slight Chance Rain Showers 23%
13. 12 PM 80° Slight Chance Rain Showers 23%
14. 1 PM 82° Partly Sunny 6%
15. 2 PM 83° Partly Sunny 6%
16. 3 PM 84° Partly Sunny 6%

Extended outlook days 8–16

Sat 7/25 Drizzle 9% 99° · 66°
Sun 7/26 Mostly Sunny 9% 106° · 78°
Mon 7/27 Cloudy 13% 97° · 84°
Tue 7/28 Mostly Sunny 17% 96° · 77°
Wed 7/29 Mostly Sunny 32% 89° · 69°
Thu 7/30 Cloudy 29% 90° · 69°
Fri 7/31 Drizzle 23% 98° · 71°
Sat 8/1 Cloudy 19% 112° · 77°
Sun 8/2 Cloudy 20% — · —

Days 8+ from the Open-Meteo multi-model ensemble — treat as a guide; accuracy drops past day 7.

Best day this week

Mild temps, low rain chance, clearer skies.

Wednesday, 7/22

Sunny, 86° / 66°

Tomorrow91°74°
Mon95°78°
Tue96°71°
Wed86°66°
Thu83°66°
Fri85°

Best time to head outside

Picks the upcoming daytime hour with the most favorable conditions for each activity. Factors in temperature, wind, precipitation timing, and pollen.

RunTomorrow 6 AM
warm at 66°F · calm wind · no rain expected · rain should clear by 6 AM · pollen high today — allergy sufferers, take note
Excellent98 / 100
Bike6 AM
comfortable at 75°F · calm wind · no rain expected · pollen high today — allergy sufferers, take note
Excellent100 / 100
Golf6 AM
comfortable at 75°F · calm wind · no rain expected · pollen high today — allergy sufferers, take note
Excellent100 / 100
Picnic6 AM
comfortable at 75°F · calm wind · no rain expected · pollen high today — allergy sufferers, take note
Excellent100 / 100
Magic ShowAnytime
Any weather is magic show weather. Indoors or out, magic doesn't care.
Corporate Magician Scott Henderson

More for St. Louis

Other cities in Missouri

Detailed forecast (NWS)

Saturday: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 102. West wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Heat index values as high as 103. Northeast wind around 3 mph. Chance of precipitation is 40%.
Monday: Sunny, with a high near 95.
Tuesday: Sunny, with a high near 96.

Forecast details

NWS gridpoint: LSX 95,74
Radar station: KLSX
Time zone: America/Chicago
Coordinates: 38.627, -90.199