July Weather in Spearfish, United States

Last updated: June 24, 2025

In Spearfish, United States, the average temperature in July hovers around 22°C (72°F), providing a comfortable climate for all activities. Temperatures can vary significantly, ranging from a cool 9°C (49°F) to a sweltering 39°C (103°F). With 88 mm (3.4 in) of precipitation spread across 12 days, it’s wise to be prepared for a few rainy moments. The day-to-day weather is also marked by a high average humidity of 85%, adding to the rich, tropical ambiance of the area.

July Temperature in Spearfish

In July in Spearfish, the average temperature is 22°C (72°F). Maximum temperatures can reach 39°C (103°F), while minimums can drop as low as 9°C (49°F). This climate makes Spearfish an ideal destination for travelers seeking a mix of warm and cool weather experiences.

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

The chart illustrates July temperature patterns in Spearfish, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spearfish, July typically has an average temperature of 22°C (72°F), with highs reaching up to 39°C (103°F) and lows dropping to around 9°C (49°F).

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

July Precipitation in Spearfish

In Spearfish, in July, the precipitation amount is 88 mm (3.4 in) over the course of 12 days.

July Precipitation Trends in Spearfish

The chart displays monthly precipitation patterns in Spearfish, 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 Spearfish, July typically receives around 88 mm (3.4 inches) of precipitation spread over approximately 12 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 Spearfish

In Spearfish in July, humidity is 85%. With an average temperature of 22°C (72°F), this humidity feels like you're walking through a warm, dense fog, making every step slightly sticky and adding a layer of heaviness to the air that can be both suffocating and refreshing at the same time, definitely affecting your travel experience.

July Average Humidity in Spearfish

This chart illustrates the average monthly humidity levels in Spearfish, 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 Spearfish is approximately 85%, 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 Spearfish

In Spearfish 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 Spearfish.

Maximum UV Index Levels in Spearfish for July

The chart shows the monthly maximum UV Index (UVI) for Spearfish 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 Spearfish typically reaches 11, which falls under the extreme exposure category.

Data source: Spearfish 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 Spearfish Compares to Other Months

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

This table compares monthly weather conditions in Spearfish, 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 (26°F)	22 mm (0.8 inches)	77%	moderate
February Weather	-6°C (21°F)	33 mm (1.3 inches)	80%	moderate
March Weather	2°C (35°F)	39 mm (1.5 inches)	70%	high
April Weather	5°C (41°F)	74 mm (2.9 inches)	70%	very high
May Weather	11°C (52°F)	98 mm (3.9 inches)	76%	very high
June Weather	19°C (66°F)	65 mm (2.6 inches)	84%	extreme
July Weather	22°C (72°F)	88 mm (3.4 inches)	85%	extreme
August Weather	20°C (69°F)	58 mm (2.3 inches)	84%	very high
September Weather	16°C (61°F)	43 mm (1.7 inches)	77%	very high
October Weather	7°C (44°F)	65 mm (2.5 inches)	73%	moderate
November Weather	3°C (37°F)	21 mm (0.8 inches)	74%	moderate
December Weather	-1°C (30°F)	31 mm (1.2 inches)	79%	low