Louisville weather in August

August in Louisville: sweltering, rainy — a great time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Louisville🇺🇸 United States · Great Lakes & Midwest · City74
  1. 50Jan
  2. 59Feb
  3. 70Mar
  4. 81Apr
  5. 89May
  6. 78Jun
  7. 68Jul
  8. 74Aug
  9. 83Sep
  10. 87Oct
  11. 69Nov
  12. 58Dec

#6 of 12 months in Louisville · #840 of 1413 destinations to visit in August · comfort 74/100 (tier B)

Days
31°C
Nights
21°C
Wet days
7
Sun
11 h
Humidity
75%
Daylight
14 h
Louisville, United States
Photo: Chris L · Pexels

Traveller notes on Louisville in August

Notes from nearby Mammoth Cave National Park (122 km away)

Louisville doesn't have its own notes for August yet — these are about Mammoth Cave National Park, close enough to share the season.

Mammoth Cave-forum threads on August crowds describe the cave as staying a constant, comfortable temperature regardless of the season above ground, posters calling this a real relief on a hot summer day. Regulars call the park genuinely busy through most of August, crowds noticeably thinning once Kentucky schools return around the 21st. Posters recommend booking cave tours well ahead during peak weeks, popular tour times capable of selling out on weekends. Regulars call midweek visits calmer than weekends if a flexible schedule allows it. Posters describe the surface trails and river as both worth a stop before or after a cave tour, though the heat and humidity above ground make the underground portion the real highlight this time of year. Regulars recommend real layers for the cave despite the heat outside, the constant underground chill catching first-timers off guard. The record: 32.2C days feeling like 35C, 19.2C nights, 106.4mm across over 9 days and 72 percent humidity.
MammothCaveAugustRegular · August · 1 month ago · about Mammoth Cave National Park · Read more on Tripadvisor ↗

Other months in Louisville

Louisville-forum threads on the best time to visit are blunt that July belongs near the bottom of the list, one regular's standing advice being to skip the whole July-August stretch if dates are flexible at all - heat and humidity together push it into the genuinely uncomfortable range for a full day of walking around downtown or the bourbon trail. Posters consistently point toward October instead for the year's most reliable stretch, dry days and cool nights, though plenty concede July is entirely doable with the right pacing. The standing strategy repeated across threads is distillery tours and museums through the middle of the day, saving outdoor time - Waterfront Park, the river walk - for morning or evening when the air actually cools off. The record: 31.6C days feeling like a punishing 36C, 21.6C nights, 111mm across 8.3 days, 76 percent humidity and 11.7 hours of sun.
BourbonTrailJulyRegular · July · 1 month ago · Read more on Tripadvisor ↗
Kentucky forum threads are consistent that April weather here is genuinely unpredictable - one poster described swings from 70F one day to the mid-30s the next, and general advice is to pack layers since a single week can run anywhere from the 80s down to near-freezing mornings. Rain is a real possibility throughout the month, not concentrated in any one stretch. The payoff several regulars highlighted: rhododendrons, azaleas, dogwoods and wildflowers all coming into bloom makes April one of the prettiest windows to be outdoors here, swings and showers notwithstanding.
KentuckyBluegrassRegular · April · 1 month ago · Read more on Tripadvisor ↗
Forum posters describe March weather in Louisville and Kentucky more broadly as genuinely unpredictable, capable of delivering 75F and sunny one day and freezing rain the next within the same visit. Posters recommend preparing for chilly conditions, especially at night, alongside a real chance of occasional showers, and suggest checking forecasts close to the travel date rather than relying on the calendar alone. Posters do note that travelers chasing guaranteed warmth might look further south instead, to Georgia, Florida or South Carolina, and that October tends to draw more praise as a dry, pleasant Louisville shoulder-season pick than March does. Posters generally rate March as a mixed, changeable early-spring month for Louisville, layers and flexible plans the recommended approach.
Tripadvisor community · March · 1 month ago · Read more on Tripadvisor ↗
Forum posters describe November in Louisville as cool to cold and genuinely variable, with highs typically in the 40s or 50sF but real swings possible - some days climbing into the 60s, others dropping into the 30s, and cloudy, sometimes rainy stretches common throughout the month. Posters are direct that snow and ice can arrive as early as mid-November in a given year and persist into the following spring depending on that winter's weather pattern. Posters consistently recommend checking a short-range forecast the day before any outdoor plans rather than trusting a longer-range prediction, given how much November conditions can shift. Posters generally suggest mid-to-late October or very early November as a safer bet than deeper into the month if avoiding a chance of snow matters for a trip.
Tripadvisor community · November · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Louisville's card on the map.

Louisville climate normals — August

Daytime high31°C / 87°F🔥 sweltering
Nighttime low21°C / 69°F
Feels like (high)34°C / 93°F
Rainfall95 mm / 3.7 in🌧 rainy
Rainy days7 days
Humidity75%💧 humid
Dew point19°C / 66°F
Sunshine11 h/day
Daylight13.6 h
Wind11 km/h / 7 mph
Air quality (US AQI)59🙂 moderate

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Louisville in August

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Peak crowdsKentucky State Fair, Summer break in United States, school holidays in 2 of the markets that fill it(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Best months for Louisville's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherLouisville's best weather comes in May, September and October — separate windows, not one continuous season.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Louisville in August

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Festival

    Kentucky State Fair

    12–28 Aug · usuallyMajor festivalCrowded

    Eleven days of livestock judging, a butter sculpture and grandstand concerts at the expo centre by the airport, in the most humid fortnight of the year. Go in the evening. Source ↗

What's on around the world in August →

Nearby, and something's on

Within 300 km of Louisville — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Louisville?

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Louisville in August — FAQ

Is August a good time to visit Louisville?
August in Louisville: sweltering, rainy — a great time to visit. It ranks #6 of 12 months for Louisville on SeasonMap's comfort score (74/100).
What is the weather like in Louisville in August?
In August, Louisville averages a daily high of 30.6°C and a low of 20.5°C, with about 94.6 mm of rain over roughly 7.2 rainy days.
What is the air quality in Louisville in August?
Louisville has a mean US Air Quality Index of about 59 in August.

Within 300 km: Cincinnati's Cincinnati Opera Summer Festival around 12 Jun – 5 Aug, and Nashville's Tomato Art Fest on 7–8 Aug.