Climate Chart of Indianapolis, USA
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For Indianapolis, USA, the climate data describe 2013–2023.
Climate overview
Temperature
Monthly mean temperatures span from January at -1.5 °C to a peak in July at 24.1 °C. These are averages for each month, not daytime highs, so they describe the broad temperature pattern rather than the conditions on any particular day. The unweighted mean of the monthly temperature means is 12.1 °C; it summarises the calendar-month averages without weighting them by the number of days in each month.
Rain
Mean daily rainfall is greatest in May, at 3.83 mm/day, and lowest in January, at 2.19 mm/day. These figures are daily averages, not monthly totals, and do not indicate how often rain falls or guarantee dry weather in the lower-average month. Across the calendar months, the unweighted mean of monthly mean daily rainfall is 2.93 mm/day. The measure offers a broad comparison of average daily amounts, not a forecast for an individual day.
Sunshine
Mean daily sunshine duration reaches its monthly high in July at 11.30 hours/day, while the low is in December at 4.79 hours/day. These averages describe sunshine duration, not day length, and actual conditions can vary from day to day.
Snow
Mean daily snowfall is highest in February, at 5.02 mm/day. This is a daily mean rather than a monthly accumulation, so it should not be read as a total snowfall amount for that month.
Best Travel Time Guide for Indianapolis, USA: Ideal Seasons and Weather Insights
For visitors prioritising lower average rainfall, January is the conditional option indicated by the lowest monthly mean daily rainfall, 2.19 mm/day. It is not a promise of dry days or a measure of rain frequency, so flexible plans and rain protection remain sensible; May has the highest monthly mean daily rainfall at 3.83 mm/day, making preparation for wet weather particularly relevant then. Travellers seeking cooler monthly averages can consider January, when the monthly mean temperature is -1.5 °C; this is not a daytime maximum and individual days may differ. For daylight outdoor planning, mean daily sunshine is highest in July at 11.30 hours/day and lowest in December at 4.79 hours/day. Sunshine duration is not day length, and these separate criteria do not establish one universally best time to visit.
Climate Data Overview for Indianapolis, USA
Explore the comprehensive climate data for Indianapolis, USA. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.
| Month | Average: Temperature °C | Rain (mm) / day | Snow (mm) / day | Sunshine (h) / day |
|---|---|---|---|---|
| Jan | -1.5 | 2.19 | 4.20 | 5.00 |
| Feb | -0.0 | 2.27 | 5.02 | 6.21 |
| Mar | 5.1 | 3.54 | 3.00 | 7.11 |
| Apr | 11.3 | 3.57 | 0.67 | 8.49 |
| May | 17.7 | 3.83 | 0.00 | 9.81 |
| Jun | 22.7 | 3.39 | 0.00 | 11.23 |
| Jul | 24.1 | 3.66 | 0.00 | 11.30 |
| Aug | 23.5 | 2.73 | 0.00 | 10.73 |
| Sep | 20.7 | 2.30 | 0.00 | 9.69 |
| Oct | 13.9 | 2.83 | 0.05 | 7.41 |
| Nov | 5.9 | 2.28 | 1.09 | 6.25 |
| Dec | 1.9 | 2.61 | 2.25 | 4.79 |
| Average | 12.1 | 2.93 | 1.36 | 8.17 |
