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July Weather in St. Mary's, United States

Last updated: June 24, 2025

In July in St. Mary's, United States, the average temperature hovers around 14°C (57°F). Expect a range from a cool 6°C (43°F) to a warm 30°C (87°F). During this time, precipitation averages 63 mm (2.5 in) spread over 12 days, contributing to a notably high average humidity of 89%.

July Temperature in St. Mary's

In July, in St. Mary's, the average temperature is 14°C (57°F). The maximum can reach 30°C (87°F), while the minimum can dip to as low as 6°C (43°F). This makes St. Mary's an ideal destination for travelers looking to experience mild weather with the possibility of warmer days, perfect for outdoor activities and exploration.

July Weather in St. Mary's: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in St. Mary's, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St. Mary's, July typically has an average temperature of 14°C (57°F), with highs reaching up to 30°C (87°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec71217304555565446362013
Data source: Temperature data for St. Mary's 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 St. Mary's

In St. Mary's in July, the total precipitation amount reaches 63 mm (2.5 in) over the course of 12 days.

July Precipitation Trends in St. Mary's

The chart displays monthly precipitation patterns in St. Mary's, 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 St. Mary's, July typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec316554476455638691785559
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in St. Mary's

In St. Mary's in July humidity is 89%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities uncomfortable and travel challenging due to the oppressive heat and stickiness in the air.

July Average Humidity in St. Mary's

This chart illustrates the average monthly humidity levels in St. Mary's, 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 St. Mary's is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%96%85%78%80%86%89%91%92%90%93%98%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in St. Mary's

In St. Mary's in July, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in St. Mary's, you can refer to this Hourly UV Index in St. Mary's.

Maximum UV Index Levels in St. Mary's for July

The chart shows the monthly maximum UV Index (UVI) for St. Mary's 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 St. Mary's typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456653211
Data source: St. Mary's 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 St. Mary's Compares to Other Months

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

This table compares monthly weather conditions in St. Mary's, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-14°C (7°F)30 mm (1.2 inches)98%low
February Weather-11°C (12°F)65 mm (2.6 inches)96%low
March Weather-8°C (17°F)54 mm (2.1 inches)85%moderate
April Weather-1°C (30°F)47 mm (1.8 inches)78%moderate
May Weather7°C (45°F)63 mm (2.5 inches)80%moderate
June Weather13°C (55°F)55 mm (2.2 inches)86%high
July Weather14°C (57°F)63 mm (2.5 inches)89%high
August Weather12°C (54°F)86 mm (3.4 inches)91%moderate
September Weather8°C (47°F)91 mm (3.6 inches)92%moderate
October Weather2°C (36°F)78 mm (3.1 inches)90%low
November Weather-7°C (20°F)55 mm (2.2 inches)93%low
December Weather-11°C (13°F)59 mm (2.3 inches)98%low

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