@NWSStLouis

Official Twitter account for the National Weather Service St. Louis. Details: https://xitter.cf/t.co/BHR1bFI1Li

 St. Charles, MO
weather.gov/lsx
Joined May 2012
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  • Followers70.1K
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The chances for rain will increase over northeast Missouri and west central Illinois on Friday and across the entire area over the weekend, although widespread steady rain is not expected a this time. #stlwx #midmowx #mowx #ilwx
There are two panels showing the forecast. The first is through Friday and has a blue background with a symbol for a partly cloudy sky. On the right there is a green background with a mostly cloudy sky and a rain shower.

ALT There are two panels showing the forecast. The first is through Friday and has a blue background with a symbol for a partly cloudy sky. On the right there is a green background with a mostly cloudy sky and a rain shower.

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After the warmest September on record at St Louis, we're actually on track for one of the warmest Octobers as well. The rest of the month is forecast to be above normal.
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Our recent stretch of warm weather continues into November, but much-needed moisture may also accompany the warmth. These graphics from the CPC show increased potential for above-normal temperatures and rainfall to start November.
These graphics from the CPC show increased potential for above-normal temperatures and rainfall to start November.

ALT These graphics from the CPC show increased potential for above-normal temperatures and rainfall to start November.

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This Hallo-weekend will be warm and mostly dry. There is a 30-50% chance of rain late Saturday into early Sunday, but widespread rain is not expected.
Graphic shows a picture of a jack-o-lantern and a brief overview of the Halloween weekend forecast.

ALT Graphic shows a picture of a jack-o-lantern and a brief overview of the Halloween weekend forecast.

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Our next best chance of rain comes this weekend. Will your Halloween feature soggy pumpkins and melting witches? The timing of these showers is still uncertain.
A black cat stares from a wet street. Text describes the rain chances on Halloween.

ALT A black cat stares from a wet street. Text describes the rain chances on Halloween.

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Tonight's full moon should reach its greatest extent at 11:12 pm. It's the first full moon after last month's "Harvest Moon", so this is referred to as the "Hunter's Moon". High clouds may obscure viewing overnight. #stlwx #mowx #midmowx #ilwx
The image shows a full moon rising over downtown St. Louis. The text explains what a "Hunter's Moon" is, occurring a month after the "Harvest Moon".

ALT The image shows a full moon rising over downtown St. Louis. The text explains what a "Hunter's Moon" is, occurring a month after the "Harvest Moon".

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Very little to no change is expected weather wise through Friday. Expect dry weather with at least some sunshine each day. Days will be seasonably warm (mid 70s to near 80 degrees) with cool nights (upper 40s to mid 50s). #stlwx #mowx #ilwx #midmowx
Background picture shows a sunset with a few reddish clouds. Text describes the continued dry and warm forecast through Friday with cool nights.

ALT Background picture shows a sunset with a few reddish clouds. Text describes the continued dry and warm forecast through Friday with cool nights.

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Expect more of the same this weekend. Dry conditions with light winds and plenty of filtered sunshine. High temperatures each day are expected to be well into the 70s to near 80 degrees with lows tonight in the mid 40s to mid 50s. #stlwx #mowx #ilwx #midmowx
Background picture shows a blue sky with white cirrus/cirrostratus clouds scattered across the horizon. Forecast icons and text describe the warm and dry forecast this weekend.

ALT Background picture shows a blue sky with white cirrus/cirrostratus clouds scattered across the horizon. Forecast icons and text describe the warm and dry forecast this weekend.

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Very little change in the weather is expected through the weekend. Expect warm days and cool nights. A mostly sunny sky is forecast this afternoon, but look for a bit more clouds over the weekend. #stlwx #mowx #ilwx #midmowx
Picture on the right shows the WFO LSX radome beneath a partly cloudy sky. Cirrostratus clouds are shown during the daylight hours.

ALT Picture on the right shows the WFO LSX radome beneath a partly cloudy sky. Cirrostratus clouds are shown during the daylight hours.

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The weather is looking nice for some outdoor activities this weekend. High temperatures are expected to only be in the mid to upper 70s. Conditions are expected to remain dry with clouds gradually increasing through the weekend.
A weather graphic from NWS St. Louis titled "Got Outside Plans This Weekend?" set against a sunny background with autumn trees: Left Side: A 2x2 grid featuring four colored squares with white activity icons: a tent (camping), a fish (fishing), a baseball (sports), and a running figure (outdoor activity). Right Side:Friday: Sun icon; Highs in the mid to upper 70s, Lows in the mid-40s to lower 50s, Mostly Clear Skies. Saturday: Sun partially behind a cloud icon; Highs in the mid to upper 70s, Lows in the mid-40s to lower 50s, Partly Cloudy Skies. Sunday: Sun partially behind a cloud icon; Highs in the mid to upper 70s, Lows in the mid-40s to lower 50s, Partly Cloudy Skies. Bottom Banner: NWS St. Louis logo, timestamp 10/22/2026 4:48 AM, weather.gov/lsx, @NWSStLouis, and the Gateway Arch line drawing.

ALT A weather graphic from NWS St. Louis titled "Got Outside Plans This Weekend?" set against a sunny background with autumn trees: Left Side: A 2x2 grid featuring four colored squares with white activity icons: a tent (camping), a fish (fishing), a baseball (sports), and a running figure (outdoor activity). Right Side:Friday: Sun icon; Highs in the mid to upper 70s, Lows in the mid-40s to lower 50s, Mostly Clear Skies. Saturday: Sun partially behind a cloud icon; Highs in the mid to upper 70s, Lows in the mid-40s to lower 50s, Partly Cloudy Skies. Sunday: Sun partially behind a cloud icon; Highs in the mid to upper 70s, Lows in the mid-40s to lower 50s, Partly Cloudy Skies. Bottom Banner: NWS St. Louis logo, timestamp 10/22/2026 4:48 AM, weather.gov/lsx, @NWSStLouis, and the Gateway Arch line drawing.

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Seasonably warm temperatures and dry conditions are expected through the weekend, with highs in the mid to upper 70s (~10 degrees above normal). Skies will start off mostly clear on Friday with clouds slowly increasing through the weekend.
A weather graphic from NWS St. Louis titled "Weekend Forecast" featuring three side-by-side day columns over scenic fall landscape photos: Friday: Orange header reading "Mostly Clear Skies" with highs in the mid-70s and lows in the mid-40s to lower 50s. Pictured below is a bright blue sky over grassy fields and autumn trees. Saturday: Red header reading "Partly Cloudy Skies" with highs in the mid to upper-70s and lows in the mid-40s to lower 50s. Pictured below is a sunlit autumn landscape with a river and surrounding fall foliage. Sunday: Gold header reading "Partly Cloudy Skies" with highs in the mid to upper-70s and lows in the mid-40s to lower 50s. Pictured below is a overcast sky over rolling hills showing fall foliage. Side Bar: Black left margin with the NWS logo at the top, timestamp 10/21/2026 5:34 AM, weather.gov/lsx, @NWSStLouis, and the Gateway Arch line drawing at the bottom.

ALT A weather graphic from NWS St. Louis titled "Weekend Forecast" featuring three side-by-side day columns over scenic fall landscape photos: Friday: Orange header reading "Mostly Clear Skies" with highs in the mid-70s and lows in the mid-40s to lower 50s. Pictured below is a bright blue sky over grassy fields and autumn trees. Saturday: Red header reading "Partly Cloudy Skies" with highs in the mid to upper-70s and lows in the mid-40s to lower 50s. Pictured below is a sunlit autumn landscape with a river and surrounding fall foliage. Sunday: Gold header reading "Partly Cloudy Skies" with highs in the mid to upper-70s and lows in the mid-40s to lower 50s. Pictured below is a overcast sky over rolling hills showing fall foliage. Side Bar: Black left margin with the NWS logo at the top, timestamp 10/21/2026 5:34 AM, weather.gov/lsx, @NWSStLouis, and the Gateway Arch line drawing at the bottom.

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The Orionid Meteor Shower is expected to be at it's peak tonight with 10 to 20 meteors per hour. It should be a good night to view it with mostly clear skies and overnight temperatures in the low to mid-50s.
A graphic from NWS St. Louis titled "ORIONID METEOR SHOWER" set against a dark, starry night sky featuring white streaks representing meteors over a silhouette of trees. The visual details include: Header details: Text states "Peaks Tonight: 12 AM to 6 AM" and expects "10 to 20 meteors per hour". Forecast Box: Displays a crescent moon icon with text announcing "Mostly Clear Skies" and "Overnight Temps: Low to mid-50s". Side Bar: Left dark blue strip contains the National Weather Service logo at the top and NWS St. Louis text. The bottom shows a timestamp of 10/21/2026 3:49 AM, web/social links (weather.gov/lsx, @NWSStLouis), and a white outline graphic of the Gateway Arch.

ALT A graphic from NWS St. Louis titled "ORIONID METEOR SHOWER" set against a dark, starry night sky featuring white streaks representing meteors over a silhouette of trees. The visual details include: Header details: Text states "Peaks Tonight: 12 AM to 6 AM" and expects "10 to 20 meteors per hour". Forecast Box: Displays a crescent moon icon with text announcing "Mostly Clear Skies" and "Overnight Temps: Low to mid-50s". Side Bar: Left dark blue strip contains the National Weather Service logo at the top and NWS St. Louis text. The bottom shows a timestamp of 10/21/2026 3:49 AM, web/social links (weather.gov/lsx, @NWSStLouis), and a white outline graphic of the Gateway Arch.

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Dry weather is expected through the upcoming weekend with temperatures at or just above normal for the last half of October. Go to weather.gov/stlouis to get your local forecast. #stlwx #midmowx #mowx #ilwx
There is a picture of a farm field ready for harvest in the background with grid panel forecast of temperatures Wednesday through Sunday in the foreground.

ALT There is a picture of a farm field ready for harvest in the background with grid panel forecast of temperatures Wednesday through Sunday in the foreground.

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Temperatures will continue on the warm side of what we typically see this time of year. Expect a gradual warming trend to continue into the weekend, with lows in 40s to low 50s and highs mostly in the 70s. #stlwx #midmowx #mowx #ilwx
The picture on the top third of the image shows a horizon of dry fall colors under partly cloudy skies. The bottom of the image shows clear skies through Friday with partly cloud skies by the weekend with lows in the 40s to low 50s and highs mostly in the 70s.

ALT The picture on the top third of the image shows a horizon of dry fall colors under partly cloudy skies. The bottom of the image shows clear skies through Friday with partly cloud skies by the weekend with lows in the 40s to low 50s and highs mostly in the 70s.

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Continued dry weather along with a gradual warming trend is expected this work week. #stlwx #mowx #ilwx #midmowx
Background from top to bottom is warm shades of orange/red to blues, showing above normal temperatures to below normal temperatures. Text along with a white arrow show warming high temperatures, all above normal, through the upcoming work week.

ALT Background from top to bottom is warm shades of orange/red to blues, showing above normal temperatures to below normal temperatures. Text along with a white arrow show warming high temperatures, all above normal, through the upcoming work week.

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The Frost Advisory is in effect for early this morning has been expanded to include more of west-central Illinois and eastern Missouri.
Frost Advisory graphic with action statement.

ALT Frost Advisory graphic with action statement.

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A crystal clear sky with light southerly winds is expected to conclude the weekend with highs in the mid to upper 60s. #stlwx #mowx #ilwx #midmowx
Background picture shows the WFO LSX radome and an American flag in the foreground with a blue sky in the background. Text describes the sunny and warmer day forecast on Sunday with highs in the mid to upper 60s.

ALT Background picture shows the WFO LSX radome and an American flag in the foreground with a blue sky in the background. Text describes the sunny and warmer day forecast on Sunday with highs in the mid to upper 60s.

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A Frost Advisory is in effect for early Sunday morning as low temperatures encroach upon the freezing mark.
Graphic shows a Frost Advisory for portions of the area on Sunday morning and action statements.

ALT Graphic shows a Frost Advisory for portions of the area on Sunday morning and action statements.

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The skies will clear tomorrow, making for a beautiful fall weekend! Below normal temperatures will warm a bit on Sunday, likely remaining just below normals. #mowx #ilwx #stlwx
Weather graphic from NWS St. Louis showing a sunny "Weekend Outlook" with morning lows in the mid-to-upper 30s and highs reaching the 50s on Saturday and mid-60s on Sunday.

ALT Weather graphic from NWS St. Louis showing a sunny "Weekend Outlook" with morning lows in the mid-to-upper 30s and highs reaching the 50s on Saturday and mid-60s on Sunday.

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Lows tonight/Saturday morning will drop into the low to mid-30s. The cold along with clear skies and calm wind will create favorable conditions for frost development.
Graphic shows a map of locations under a Frost Advisory. Text to the right gives temperature information and an action statement.

ALT Graphic shows a map of locations under a Frost Advisory. Text to the right gives temperature information and an action statement.

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