St. Louis in July
In July, St. Louis averages 31°C (87°F) during the day and 21°C (70°F) at night, with frequent rain — about 17 days of the month see precipitation (152 mm total).
High seasonConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
July is one of the wetter and less comfortable months in St. Louis. If your dates are flexible, consider a different time of year.
How July compares to the rest of the year in St. Louis
July is one of the warmest months in St. Louis (1st of 12) and moderately rainy compared to the rest of the year (4th of 12). Daytime temperature runs 12°C above the annual average (19°C). July runs 1°C warmer than June (30°C) and cools 1°C in August (30°C).
July sunrise & sunset in St. Louis
Times shown for St. Louis local time (America/Chicago), calculated for the 15th of July. They shift by a few minutes day to day across the month.
Photography light in St. Louis — July
Golden-hour and blue-hour windows for the 15th of July, in St. Louis's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — St. Louis in July
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on July's tier (High season) and St. Louis's popularity.
Crowds & pricing — July in St. Louis
This is a busy month in St. Louis — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: Northern Hemisphere summer holidays
Sun & mosquito risk — July in St. Louis
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
St. Louis in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 5°C / 41°F | -4°C / 25°F | 74 mm | 13 | — |
| February | 7°C / 45°F | -4°C / 26°F | 72 mm | 13 | — |
| March | 13°C / 56°F | 3°C / 37°F | 133 mm | 16 | — |
| April | 19°C / 66°F | 8°C / 46°F | 132 mm | 16 | — |
| May | 25°C / 76°F | 14°C / 58°F | 130 mm | 20 | — |
| June | 30°C / 86°F | 20°C / 67°F | 137 mm | 17 | — |
| July | 31°C / 87°F | 21°C / 70°F | 152 mm | 17 | — |
| August | 30°C / 85°F | 20°C / 69°F | 140 mm | 18 | — |
| September | 27°C / 81°F | 17°C / 63°F | 112 mm | 13 | — |
| October | 20°C / 68°F | 10°C / 51°F | 106 mm | 14 | — |
| November | 12°C / 54°F | 3°C / 37°F | 77 mm | 12 | — |
| December | 8°C / 46°F | -1°C / 31°F | 76 mm | 10 | — |
Other cities with similar July weather
🌍 See the full ranked list of climate twins for St. Louis in July →
Frequently asked questions
How hot is St. Louis in July?
In July, St. Louis averages a high of 31°C (87°F) and a low of 21°C (70°F) — generally hot.
Does it rain a lot in St. Louis in July?
July is quite rainy in St. Louis, with about 17 rainy days on average.
Is July a good time to visit St. Louis?
July is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for St. Louis in July?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full July packing list for St. Louis for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.