August Weather in Saint Johnsville, United States

Last updated: June 24, 2025

In August, the average temperature in Saint Johnsville, United States is a pleasant 20°C (68°F). However, be prepared for the temperature to swing from a cool 7°C (45°F) to a balmy 32°C (90°F). With 129 mm (5.1 in) of precipitation spread over 13 days, it's wise to keep an umbrella handy. The air tends to be 64% humid, adding a touch of mugginess to this month's charm.

August Temperature in Saint Johnsville

In August in Saint Johnsville, the average temperature is 20°C (68°F). The maximum can reach 32°C (90°F), and the minimum can be as low as 7°C (45°F). It’s a great time for travelers to enjoy mild weather while exploring the outdoor attractions in Saint Johnsville.

August Weather in Saint Johnsville: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Saint Johnsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Johnsville, August typically has an average temperature of 20°C (68°F), with highs reaching up to 32°C (90°F) and lows dropping to around 7°C (45°F).

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

August Precipitation in Saint Johnsville

In Saint Johnsville in August, the precipitation amount is 129 mm (5.1 in) over the course of 13 days.

August Precipitation Trends in Saint Johnsville

The chart displays monthly precipitation patterns in Saint Johnsville, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Saint Johnsville, August typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Saint Johnsville

In Saint Johnsville in August humidity is 64%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making it a perfect time for travelers to explore, though they might want to stay hydrated and take breaks in the shade to fully enjoy the experience.

August Average Humidity in Saint Johnsville

This chart illustrates the average monthly humidity levels in Saint Johnsville, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Saint Johnsville is approximately 64%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Saint Johnsville

In Saint Johnsville in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Saint Johnsville.

Maximum UV Index Levels in Saint Johnsville for August

The chart shows the monthly maximum UV Index (UVI) for Saint Johnsville in August, 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 August, the maximum UV index in Saint Johnsville typically reaches 9, which falls under the very high exposure category.

Data source: Saint Johnsville August 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 August Weather in Saint Johnsville Compares to Other Months

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

This table compares monthly weather conditions in Saint Johnsville, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	93 mm (3.7 inches)	89%	moderate
February Weather	-4°C (26°F)	110 mm (4.3 inches)	88%	moderate
March Weather	0°C (32°F)	94 mm (3.7 inches)	86%	high
April Weather	7°C (44°F)	132 mm (5.2 inches)	84%	very high
May Weather	14°C (57°F)	131 mm (5.2 inches)	76%	very high
June Weather	18°C (65°F)	119 mm (4.7 inches)	72%	very high
July Weather	21°C (70°F)	143 mm (5.6 inches)	66%	very high
August Weather	20°C (68°F)	129 mm (5.1 inches)	64%	very high
September Weather	16°C (62°F)	96 mm (3.8 inches)	72%	very high
October Weather	10°C (51°F)	170 mm (6.7 inches)	81%	high
November Weather	2°C (36°F)	117 mm (4.6 inches)	87%	moderate
December Weather	-2°C (28°F)	114 mm (4.5 inches)	84%	low