US National Weather Service Saint Louis Missouri

US National Weather Service Saint Louis Missouri Official page for the National Weather Service St. Louis. Details: weather.gov/facebook
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Actual air temperatures are expected to climb into the middle 90s to near 100 degrees each day this week with heat index...
08/31/2026

Actual air temperatures are expected to climb into the middle 90s to near 100 degrees each day this week with heat index values climbing to around 105 degrees at times. If you must be outside, take frequent breaks and drink plenty of water!

Unseasonably hot temperatures are expected this week with highs in the mid/upper 90s, potentially reaching 100 degrees. ...
08/30/2026

Unseasonably hot temperatures are expected this week with highs in the mid/upper 90s, potentially reaching 100 degrees. Heat index values are forecast to reach 100-105 degrees with an Extreme Heat Watch and Heat Advisory now in effect across the area until Friday. Check the most recent forecast at: weather.gov/lsx/

Hot temperatures return to the area on Sunday and are expected to last through the work week with high temperatures in t...
08/29/2026

Hot temperatures return to the area on Sunday and are expected to last through the work week with high temperatures in the mid/upper 90s to near 100 degrees. Temperatures at night will not provide much relief as lows are forecast to be in the mid/upper 70s for most the area with lower 80s potentially for Urban areas. Reduce outdoor time and take plenty of water breaks if able. Check the most recent forecast at: weather.gov/lsx/

High temperatures will climb into the mid 90s to near 100 next week. But the humidity should remain noticeably lower wh...
08/28/2026

High temperatures will climb into the mid 90s to near 100 next week. But the humidity should remain noticeably lower when compared to earlier heat waves this summer.

After a nice start to the weekend, temperatures next week will again climb into the mid to upper 90s beginning Sunday, c...
08/27/2026

After a nice start to the weekend, temperatures next week will again climb into the mid to upper 90s beginning Sunday, continuing through at least Thursday. The good news is the humidity and heat indices will not be as high as earlier heat waves this summer.

After a nice start to the weekend, temperatures next week will again climb into the mid to upper 90s beginning Sunday an...
08/27/2026

After a nice start to the weekend, temperatures next week will again climb into the mid to upper 90s beginning Sunday and continuing through at least Thursday. The good news is the humidity and heat indices will not be as high as early heat waves this summer.

Temperatures will remain more seasonable through the end of the week, but next week another heatwave is expected to retu...
08/26/2026

Temperatures will remain more seasonable through the end of the week, but next week another heatwave is expected to return.

Strong to severe thunderstorms are possible today, mainly this afternoon into early this evening ahead of a cold front. ...
08/26/2026

Strong to severe thunderstorms are possible today, mainly this afternoon into early this evening ahead of a cold front. Damaging wind up to 60 mph is the most likely severe weather threat. Large hail is also possible, but less likely.

There is a low chance for scattered showers and thunderstorms tonight for areas along and south of I-70 in both Missouri...
08/25/2026

There is a low chance for scattered showers and thunderstorms tonight for areas along and south of I-70 in both Missouri and Illinois. Additional thunderstorms, some strong to severe, are expected Wednesday afternoon and evening.

There is a chance for strong to severe thunderstorms Wednesday afternoon into early evening. Isolated damaging wind gus...
08/25/2026

There is a chance for strong to severe thunderstorms Wednesday afternoon into early evening. Isolated damaging wind gusts are the primary threat. Some hail is also possible, but is less likely.

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12 Missouri Research Park Drive
St. Charles, MO
63304

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+16364418467

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