Speedway, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Speedway, a town in Marion County, Indiana.
Overnight
66°F
Mostly Cloudy
Mostly cloudy. Low around 66, with temperatures rising to around 69 overnight. East southeast wind around 6 mph.
7-day forecast for Speedway
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Mostly Cloudy | 6 mph ESE | 7% |
| Saturday | 88°F | Slight Chance Showers And Thunderstorms | 7 mph S | 64% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 6 mph S | 23% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 3 to 7 mph W | 40% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 10 mph NNE | 61% |
| Monday | 73°F | Showers And Thunderstorms Likely | 12 mph NE | 61% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 9 to 13 mph NE | 46% |
| Tuesday | 71°F | Chance Showers And Thunderstorms | 12 mph NE | 38% |
| Tuesday Night | 57°F | Chance Showers And Thunderstorms then Mostly Cloudy | 6 to 12 mph NE | 26% |
| Wednesday | 71°F | Mostly Cloudy | 6 to 9 mph NNE | 7% |
| Wednesday Night | 57°F | Mostly Cloudy | 5 to 9 mph N | 5% |
| Thursday | 73°F | Partly Sunny | 5 to 8 mph N | 4% |
| Thursday Night | 57°F | Mostly Cloudy | 3 to 8 mph NNE | 4% |
| Friday | 73°F | Mostly Sunny | 3 to 8 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Speedway (39.794, -86.248). Updated through the day.
Growing snapshot for Speedway
Last spring frost
Apr 12
First fall frost
Oct 29
Growing season
198 days
Hardiness zone
6b
More local growing data for Speedway: nearby ZIP 46224 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Beech Grove
Crows Nest
Cumberland
Homecroft
Indianapolis city
Lawrence
Meridian Hills
North Crows Nest
Pleasant View
Rocky Ripple
Southport
Spring Hill
Warren Park
Williams Creek
Wynnedale
Climate data from the nearest NOAA station, Indianapolis Eagle Creek Ap, In (2.9 mi from Speedway). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.