Indianapolis, IN weather by month
Midwest · Station: Indianapolis International Airport, IN · NOAA 1991–2020 Climate Normals
The best time to visit Indianapolis, IN is September–October, when average daytime highs are comfortable and rainfall sits at or below the city's monthly average. Indianapolis is hottest in July (avg high 85°F) and coolest in January (avg high 36°F). The wettest month is June (5 in) and the driest is February (2.4 in). Overall the annual mean temperature is about 53.6°F with 43.6 in of precipitation a year and 25.5 in of snow.
Source: NOAA NCEI U.S. Climate Normals 1991–2020. Data as of June 2026.
Monthly weather averages for Indianapolis
| Month | Avg high (°F) | Avg low (°F) | Avg precip (in) | Avg snow (in) |
|---|---|---|---|---|
| January | 36 | 21 | 3.1 | 8.8 |
| February | 41 | 24 | 2.4 | 6 |
| March | 52 | 33 | 3.7 | 3.2 |
| April | 64 | 43 | 4.3 | 0.2 |
| May | 73 | 54 | 4.8 | 0 |
| June | 82 | 63 | 5 | 0 |
| July | 85 | 66 | 4.4 | 0 |
| August | 84 | 65 | 3.2 | 0 |
| September | 78 | 57 | 3.1 | 0 |
| October | 66 | 46 | 3.2 | 0.1 |
| November | 52 | 35 | 3.5 | 0.8 |
| December | 40 | 26 | 2.9 | 6.4 |
Source: NOAA NCEI U.S. Climate Normals 1991–2020. Data as of June 2026.
Best time to visit Indianapolis
Based on the normals above, the most pleasant window is September–October. In those months daytime highs are in the mild-to-warm range and precipitation is no higher than the city's typical month, so you avoid both the peak hot of July (when highs reach about 85°F — stay hydrated and seek shade midday) and the cool, darker conditions around January (highs near 36°F). Try to avoid June if rain would spoil your plans — it is the wettest month at 5 in. Use the packing & comfort tool to check any specific month.
How Indianapolis compares
Indianapolis's 43.6 in of annual precipitation and 53.6°F mean temperature put it in context with other US cities. See where it ranks for warmest in January, rainiest overall and driest overall, or browse the full list of cities.
Frequently asked questions
What is the best time to visit Indianapolis?
The most comfortable time to visit Indianapolis, IN is September–October, when average daytime highs are mild and rainfall is at or below the city's average. Indianapolis is hottest in July (avg high 85°F) and coolest in January (avg high 36°F), per NOAA 1991–2020 Climate Normals.
What is the average temperature in Indianapolis?
Indianapolis's annual mean temperature is about 53.6°F. The warmest month is July (average high 85°F, low 66°F) and the coolest is January (average high 36°F, low 21°F).
How much rain does Indianapolis get?
Indianapolis receives about 43.6 inches of precipitation a year. The wettest month is June (5 in) and the driest is February (2.4 in).
Does it snow in Indianapolis?
Yes. Indianapolis averages about 25.5 inches of snow a year. Snow normally falls between late autumn and early spring; summer months see none.
Source
Monthly averages from the NOAA NCEI U.S. Climate Normals 1991–2020, station Indianapolis International Airport, IN (reference values verified against the published normals). Climate normals describe a 30-year average, not a forecast; any individual year can differ. See our methodology for how "best time to visit" is derived.
Last updated: 2026-06-18