Speedway, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Speedway, a town in Marion County, Indiana.
Today
88°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 11am and 1pm, then showers and thunderstorms likely between 1pm and 4pm, then a chance of showers and thunderstorms. Partly sunny. High near 88, with temperatures falling to around 85 in the afternoon. South wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Speedway
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Slight Chance Showers And Thunderstorms | 7 mph S | 64% |
| Tonight | 70°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 6 mph S | 23% |
| Sunday | 85°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 8 mph WNW | 46% |
| Sunday Night | 61°F | Showers And Thunderstorms Likely | 12 mph NE | 56% |
| Monday | 71°F | Showers And Thunderstorms Likely | 9 to 13 mph NE | 63% |
| Monday Night | 55°F | Rain Showers Likely | 9 to 13 mph NE | 61% |
| Tuesday | 69°F | Chance Showers And Thunderstorms | 12 mph NE | 42% |
| Tuesday Night | 56°F | Chance Showers And Thunderstorms | 6 to 12 mph NNE | 33% |
| Wednesday | 70°F | Slight Chance Rain Showers | 6 to 9 mph NNE | 15% |
| Wednesday Night | 56°F | Mostly Cloudy | 5 to 9 mph NNE | 9% |
| Thursday | 71°F | Partly Sunny | 5 to 9 mph NNE | 4% |
| Thursday Night | 56°F | Mostly Cloudy | 5 to 9 mph NNE | 4% |
| Friday | 74°F | Mostly Sunny | 5 to 9 mph NNE | 3% |
| Friday Night | 55°F | Partly Cloudy | 5 to 9 mph NE | 2% |
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.