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July Weather in Waterloo, United States

Last updated: June 24, 2025

In July, the average temperature in Waterloo, United States is a warm 26°C (78°F), with temperatures ranging from a cool 14°C (57°F) to a scorching 36°C (98°F). Expect 74 mm (2.9 in) of precipitation over 9 days, and a notable average humidity of 83%, making it a perfect time for warm weather activities and tropical adventures!

July Temperature in Waterloo

In July in Waterloo, the average temperature is 26°C (78°F). Maximums can reach 36°C (98°F) and minimums can be as low as 14°C (57°F). This makes it a great time for travelers to enjoy warm weather while also having the option to experience cooler evenings.

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

The chart illustrates July temperature patterns in Waterloo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterloo, July typically has an average temperature of 26°C (78°F), with highs reaching up to 36°C (98°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec252541506376787570534031
Data source: Temperature data for Waterloo 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 Waterloo

In Waterloo in July, the precipitation amount is 74 mm (2.9 in), which occurs over a span of 9 days.

July Precipitation Trends in Waterloo

The chart displays monthly precipitation patterns in Waterloo, 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 Waterloo, July typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec3330975414612674101831153140
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Waterloo

In Waterloo in July, humidity is 83%. With an average temperature of 26°C (78°F), this humidity feels like a heavy blanket wrapping around you, making travel a sticky affair as sweat lingers on your skin and every step requires extra effort.

July Average Humidity in Waterloo

This chart illustrates the average monthly humidity levels in Waterloo, 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 Waterloo is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Waterloo

In Waterloo in July, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Waterloo.

Maximum UV Index Levels in Waterloo for July

The chart shows the monthly maximum UV Index (UVI) for Waterloo 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 Waterloo typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Waterloo 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 Waterloo Compares to Other Months

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

This table compares monthly weather conditions in Waterloo, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)32 mm (1.3 inches)76%moderate
February Weather-4°C (26°F)30 mm (1.2 inches)80%moderate
March Weather5°C (41°F)97 mm (3.8 inches)73%high
April Weather10°C (51°F)54 mm (2.1 inches)74%very high
May Weather17°C (63°F)146 mm (5.8 inches)78%very high
June Weather24°C (76°F)126 mm (5.0 inches)82%very high
July Weather26°C (78°F)74 mm (2.9 inches)83%very high
August Weather24°C (75°F)100 mm (4.0 inches)80%very high
September Weather21°C (70°F)83 mm (3.3 inches)75%very high
October Weather11°C (53°F)115 mm (4.5 inches)75%high
November Weather5°C (40°F)31 mm (1.2 inches)82%moderate
December Weather0°C (32°F)40 mm (1.6 inches)83%low

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