Weather in Saint Louis: July
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Average day temperature: | 85.5°F |
| Average night temperature: | 77.8°F | |
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Sea water temperature: | 79.8°F |
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Number of sunny days: | 19 days |
| Day length: | 12.9 - 13.1 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 1.0 in. | |
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forecast
| Saint Louis |
temperature
| Saint Louis |
Air temperature in July, °F
The highest day temperature during July of 2025 was 81°F. At the same time the lowest night temperature was 73°F. Daily and nightly averages during July were 79.3°F and 77.1°F.
Sea water temperature in Saint Louis in July, °F
The average sea water temperature in July of 2025 was 79.8°F. The highest and lowest sea temperatures during the month were 83.5°F and 75.0°F.
Mostly all days in July are sunny but cloudy days are also possible.
Precipitation total in July, in.
Precipitation total value in Saint Louis in July is 1.1 in. Other months of the year show relatively similar values.
The average wind speed value in July is 12.9 mph It makes July one of the least windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in July is: 7.9.
Best time for vacation in Saint Louis
Saint Louis on a weather map
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