Marlborough, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marlborough, a village in St. Louis County, Missouri.
This Afternoon
73°F
Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 73, with temperatures falling to around 66 in the afternoon. South wind around 12 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
7-day forecast for Marlborough
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Rain | 12 mph S | 84% |
| Tonight | 54°F | Light Rain | 7 to 13 mph S | 91% |
| Wednesday | 63°F | Mostly Cloudy | 6 to 12 mph W | 5% |
| Wednesday Night | 46°F | Partly Cloudy | 5 mph SW | 0% |
| Thursday | 66°F | Sunny | 5 to 8 mph W | 1% |
| Thursday Night | 46°F | Mostly Cloudy | 6 mph NW | 10% |
| Friday | 58°F | Mostly Cloudy | 8 mph NW | 6% |
| Friday Night | 41°F | Mostly Cloudy | 5 mph N | 2% |
| Saturday | 56°F | Partly Sunny | 3 mph NW | 0% |
| Saturday Night | 39°F | Partly Cloudy | 2 mph NW | 1% |
| Sunday | 62°F | Sunny | 5 mph W | 9% |
| Sunday Night | 39°F | Mostly Clear | 3 mph W | 5% |
| Monday | 67°F | Sunny | 2 to 6 mph SW | 2% |
| Monday Night | 44°F | Mostly Clear | 3 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Marlborough (38.568, -90.339). Updated through the day.
Growing snapshot for Marlborough
Last spring frost
Apr 1
First fall frost
Nov 4
Growing season
218 days
Hardiness zone
7a
More local growing data for Marlborough: nearby ZIP 63123 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Affton
Ballwin
Bel-Nor
Bel-Ridge
Bella Villa
Bellefontaine Neighbors
Bellerive Acres
Berkeley
Beverly Hills
Black Jack
Breckenridge Hills
Brentwood
Bridgeton
Calverton Park
Castle Point
Champ
Charlack
Chesterfield
Clarkson Valley
Clayton
Concord
Cool Valley
Country Club Hills
Country Life Acres
Crestwood
Creve Coeur
Crystal Lake Park
Dellwood
Des Peres
Edmundson
Climate data from the nearest NOAA station, St Louis Sci Ctr, Mo (6.5 mi from Marlborough). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.