When to Visit Indianapolis
Climate guide & best times to travel
Best Time to Visit
Month-by-Month Guide
January
January is among the coolest months in Indianapolis, though temperatures remain extremely hot with highs of 96°F. With minimal rainfall and persistent heat, this is one of the more manageable months for visiting, though extreme heat precautions are still essential. Indoor activities are strongly recommended during peak daytime hours.
February
February sees temperatures climbing to 105°F with very dry conditions continuing. The month offers slightly more tolerable conditions than summer months, making it relatively better for essential outdoor activities. Humidity remains constant at 70% with negligible precipitation.
March
March marks a significant temperature increase as highs reach 125°F, signaling the transition toward extreme summer heat. The dry pattern continues with minimal rainfall, and outdoor activities become increasingly hazardous. Indoor venues with air conditioning are essential for comfort and safety.
April
April brings dangerously high temperatures reaching 147°F with slightly increased rainfall to 0.2 inches. Heat becomes a serious health concern, and outdoor activities should be severely limited. This marks the beginning of the most challenging period for visitors.
May
May experiences extreme heat with temperatures soaring to 164°F, making it one of the most dangerous months. Even nighttime lows remain above 128°F, offering no respite from the heat. Travel during this month is strongly discouraged unless absolutely necessary.
June
June sees temperatures reaching a life-threatening 179°F during the day. This marks the beginning of the peak heat season with minimal rainfall and constant high humidity. All outdoor activities should be avoided, and extreme heat safety protocols are critical.
July
July is the hottest month of the year with temperatures peaking at an unprecedented 185°F. These are among the most extreme conditions recorded, making outdoor exposure extremely dangerous. This is definitively the worst time to visit Indianapolis for any purpose.
August
August remains exceptionally hot with highs of 183°F, barely below July's peak. The extreme heat continues with minimal rainfall and no relief in sight. Indoor climate-controlled environments are the only safe option during this month.
September
September begins a gradual cooling trend with temperatures dropping to 172°F, though conditions remain extremely dangerous. Rainfall decreases back to 0.1 inches as the dry season continues. Heat precautions remain absolutely essential throughout the month.
October
October sees temperatures moderating to 150°F, though this still represents extreme heat conditions. The continued dry weather and persistent humidity make this a transitional month toward relatively cooler conditions. Outdoor activities remain highly inadvisable.
November
November brings further temperature relief with highs of 125°F, matching March conditions. While still extremely hot by any normal standard, this represents a significant improvement from summer peaks. Indoor activities and climate-controlled venues remain the safest options.
December
December is one of the coolest months with temperatures reaching 104°F, offering the most manageable conditions of the year. Despite being the "coolest" period, temperatures remain dangerously hot and require continued vigilance. This is among the better months for essential travel to Indianapolis.