Eureka, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Eureka, a city in St. Louis County, Missouri.
This Afternoon
59°F
Mostly Cloudy
Mostly cloudy, with a high near 59. West wind 3 to 8 mph.
7-day forecast for Eureka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 59°F | Mostly Cloudy | 3 to 8 mph W | 0% |
| Tonight | 42°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 62°F | Sunny | 3 to 7 mph W | 9% |
| Thursday Night | 43°F | Isolated Rain Showers then Mostly Cloudy | 3 mph NW | 16% |
| Friday | 54°F | Partly Sunny | 3 to 7 mph N | 5% |
| Friday Night | 30°F | Mostly Clear | 0 to 3 mph N | 0% |
| Saturday | 54°F | Mostly Sunny | 1 mph N | 0% |
| Saturday Night | 29°F | Mostly Clear | 0 mph | 0% |
| Sunday | 60°F | Sunny | 2 mph W | 0% |
| Sunday Night | 32°F | Mostly Clear | 0 mph | 0% |
| Monday | 66°F | Sunny | 2 mph W | 0% |
| Monday Night | 35°F | Clear | 1 mph W | 1% |
| Tuesday | 66°F | Sunny | 2 mph W | 3% |
| Tuesday Night | 38°F | Mostly Clear | 0 mph | 3% |
Forecast source: National Weather Service (api.weather.gov) for Eureka (38.498, -90.645). Updated through the day.
Growing snapshot for Eureka
Last spring frost
Apr 12
First fall frost
Oct 23
Growing season
193 days
Hardiness zone
6b
More local growing data for Eureka: nearby ZIP 63025 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 Sprt Of S L Ap, Mo (11.7 mi from Eureka). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.