Weather in Speedway, Indiana
Roses open on the Piedmont edge. Day 59 of spring. Read this microseason across nine climate regions →
- TodayMay 16Heavy Drizzle63%75°59°
- SundayMay 17Light Drizzle18%84°61°
- MondayMay 18Heavy Rain55%84°62°
- TuesdayMay 19Showers75%78°67°
- WednesdayMay 20Light Showers75%69°57°
- ThursdayMay 21Light Drizzle12%68°54°
- FridayMay 22Drizzle21%62°54°
- PM 2.5
- 5.8 μg/m³
- PM 10
- 7.1 μg/m³
- NO₂
- 6.0 μg/m³
- Ozone
- 83.0 μg/m³
- UV Index
- 0.0 Low
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 10:35 AM
- Moonset
- 1:22 AM
- In sign
- ♊︎ Gemini
Roses open on the Piedmont edge
Speedway at a glance
- Today vs. normal: 6°F below the seasonal normal for this latitude
- Last frost: April 15 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Warm-season window is open
As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Speedway's warmest month is July (~74°F mean) and its coldest is January (~27°F). Rainfall peaks in June (5.4 inches) and bottoms out in February (2.3 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 27° | 3.1″ | 6 |
| February | 30° | 2.3″ | 5 |
| March | 40° | 3.7″ | 8 |
| April | 52° | 4.5″ | 8 |
| May | 62° | 5.0″ | 9 |
| June | 71° | 5.4″ | 8 |
| July | 74° | 3.9″ | 6 |
| August | 73° | 3.6″ | 5 |
| September | 66° | 3.2″ | 5 |
| October | 54° | 3.2″ | 6 |
| November | 42° | 3.4″ | 6 |
| December | 32° | 3.3″ | 7 |
Regional context
Speedway sits within a humid subtropical climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Indianapolis, IN, Evansville, IN, Lafayette, IN, Bloomington, IN, Fishers, IN.
Frequently asked
- When does it freeze in Speedway?
- Speedway's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Speedway?
- June is the wettest month with about 5.4 inches of rain on average; the city receives roughly 45 inches annually.
- What is the warmest month in Speedway?
- July is typically warmest, averaging about 74°F.
- What is the coldest month in Speedway?
- January is typically coldest, averaging about 27°F.
- When can I start a vegetable garden in Speedway?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Speedway get?
- Speedway averages about 79 rainy days per year.
- What hardiness zone is Speedway?
- Speedway's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Speedway, Indiana sits in a humid subtropical climate zone. January means hover near 27°F while July averages 74°F — a 47°F seasonal swing.
Across the year, Speedway receives about 45 inches of precipitation spread over roughly 79 rainy days.
The rhythm of the year is set by latitude (39.8°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.