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July Weather in Collinsville, United States

Last updated: June 24, 2025

In July, the average temperature in Collinsville, United States is a warm 26°C (80°F), perfect for enjoying outdoor activities. Temperatures can range from a comfortable 18°C (64°F) to a sizzling 36°C (98°F). Be prepared for some rain, as 105 mm (4.2 in) of precipitation can occur over 16 days, contributing to an average humidity of 78%. 🌦️✨

July Temperature in Collinsville

In July in Collinsville, the average temperature is 26°C (80°F). Maximums can reach 36°C (98°F), and minimums can drop as low as 18°C (64°F). This pleasant climate makes it an ideal destination for travelers seeking warm weather and outdoor activities.

July Weather in Collinsville: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Collinsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Collinsville, July typically has an average temperature of 26°C (80°F), with highs reaching up to 36°C (98°F) and lows dropping to around 18°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec445056627176807975665147
Data source: Temperature data for Collinsville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in Collinsville

In Collinsville in July, the precipitation amount is 105 mm (4.2 in) spread over 16 days.

July Precipitation Trends in Collinsville

The chart displays monthly precipitation patterns in Collinsville, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Collinsville, July typically receives around 105 mm (4.2 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec12219517415210515010613410913286159
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Collinsville

In Collinsville in July, humidity is 78%. With an average temperature of 26°C (80°F), this humidity feels like a warm blanket wrapping around you, making travel feel sticky and heavy, while the air clings to your skin and encourages frequent breaks in shaded spots to stay cool.

July Average Humidity in Collinsville

This chart illustrates the average monthly humidity levels in Collinsville, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Collinsville is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Collinsville

In Collinsville in July, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Collinsville.

Maximum UV Index Levels in Collinsville for July

The chart shows the monthly maximum UV Index (UVI) for Collinsville in July, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In July, the maximum UV index in Collinsville typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Collinsville July UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How July Weather in Collinsville Compares to Other Months

Weather in Collinsville varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in Collinsville, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Collinsville, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)122 mm (4.8 inches)87%moderate
February Weather10°C (50°F)195 mm (7.7 inches)87%high
March Weather13°C (56°F)174 mm (6.9 inches)85%very high
April Weather16°C (62°F)152 mm (6.0 inches)82%very high
May Weather22°C (71°F)105 mm (4.1 inches)83%extreme
June Weather25°C (76°F)150 mm (5.9 inches)82%extreme
July Weather26°C (80°F)105 mm (4.2 inches)78%extreme
August Weather26°C (79°F)134 mm (5.3 inches)67%extreme
September Weather24°C (75°F)109 mm (4.3 inches)64%very high
October Weather19°C (66°F)132 mm (5.2 inches)74%very high
November Weather11°C (52°F)86 mm (3.4 inches)87%high
December Weather9°C (48°F)159 mm (6.3 inches)88%moderate

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