July Weather in Saint John, United States

Last updated: June 24, 2025

In Saint John, United States, the average temperature in July hovers around 24°C (75°F), creating a pleasantly warm atmosphere. Temperatures can dip to a minimum of 13°C (57°F) and peak at a maximum of 34°C (93°F). Visitors should also anticipate some moisture, with 103 mm (4.1 in) of precipitation expected over 11 days. The air feels quite humid, averaging around 80%, adding to the region's tropical charm.

July Temperature in Saint John

In July in Saint John, the average temperature is 24°C (75°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 13°C (57°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities in Saint John.

July Weather in Saint John: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Saint John, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint John, July typically has an average temperature of 24°C (75°F), with highs reaching up to 34°C (93°F) and lows dropping to around 13°C (57°F).

Data source: Temperature data for Saint John generated using information from the Copernicus Climate Change Service.

July Precipitation in Saint John

In Saint John in July, the precipitation amount is 103 mm (4.1 in) spread over 11 days.

July Precipitation Trends in Saint John

The chart displays monthly precipitation patterns in Saint John, 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 Saint John, July typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

July Humidity in Saint John

In Saint John in July humidity is 80%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky blanket enveloping you, making travel slightly uncomfortable as sweat clings to your skin and the air feels thick, urging you to seek shade and hydration frequently.

July Average Humidity in Saint John

This chart illustrates the average monthly humidity levels in Saint John, 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 Saint John is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Saint John

In Saint John 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 Saint John.

Maximum UV Index Levels in Saint John for July

The chart shows the monthly maximum UV Index (UVI) for Saint John 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 Saint John typically reaches 10, which falls under the very high exposure category.

Data source: Saint John 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 Saint John Compares to Other Months

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

This table compares monthly weather conditions in Saint John, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	70 mm (2.7 inches)	82%	moderate
February Weather	-2°C (29°F)	71 mm (2.8 inches)	83%	moderate
March Weather	4°C (39°F)	99 mm (3.9 inches)	84%	high
April Weather	9°C (48°F)	119 mm (4.7 inches)	85%	very high
May Weather	16°C (60°F)	162 mm (6.4 inches)	79%	very high
June Weather	22°C (71°F)	130 mm (5.1 inches)	82%	very high
July Weather	24°C (75°F)	103 mm (4.1 inches)	80%	very high
August Weather	23°C (73°F)	92 mm (3.6 inches)	81%	very high
September Weather	20°C (68°F)	74 mm (2.9 inches)	80%	very high
October Weather	13°C (56°F)	142 mm (5.6 inches)	82%	high
November Weather	5°C (40°F)	68 mm (2.7 inches)	88%	moderate
December Weather	1°C (34°F)	60 mm (2.4 inches)	84%	low