July Weather in Longmont, United States

Last updated: June 24, 2025

The average temperature in Longmont, United States during July is a comfortable 23°C (75°F). Expect a minimum temperature of 10°C (50°F) and a maximum that can reach up to 38°C (100°F). During this time, the area sees about 31 mm (1.2 in) of precipitation over approximately 7 days, with an average humidity of 62%.

July Temperature in Longmont

In July in Longmont, the average temperature is 23°C (75°F). Maximums can reach 38°C (100°F) and minimums can be as low as 10°C (50°F). This makes it a great time to explore the outdoors while being prepared for both heat and cooler evenings.

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

The chart illustrates July temperature patterns in Longmont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longmont, July typically has an average temperature of 23°C (75°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (50°F).

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

July Precipitation in Longmont

In Longmont in July, the precipitation amount is 31 mm (1.2 in) over the course of 7 days.

July Precipitation Trends in Longmont

The chart displays monthly precipitation patterns in Longmont, 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 Longmont, July typically receives around 31 mm (1.2 inches) of precipitation spread over approximately 7 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 Longmont

In Longmont in July, humidity is 62%. With an average temperature of 23°C (75°F), this humidity feels like a warm embrace, making it a bit sticky yet comfortable for traveling, as long as you stay hydrated and take occasional breaks in the shade.

July Average Humidity in Longmont

This chart illustrates the average monthly humidity levels in Longmont, 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 Longmont is approximately 62%, 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 Longmont

In Longmont in July, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Longmont.

Maximum UV Index Levels in Longmont for July

The chart shows the monthly maximum UV Index (UVI) for Longmont 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 Longmont typically reaches 12, which falls under the extreme exposure category.

Data source: Longmont 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 Longmont Compares to Other Months

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

This table compares monthly weather conditions in Longmont, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	19 mm (0.8 inches)	84%	moderate
February Weather	-1°C (30°F)	26 mm (1.0 inches)	85%	high
March Weather	5°C (40°F)	56 mm (2.2 inches)	75%	very high
April Weather	9°C (48°F)	55 mm (2.2 inches)	67%	extreme
May Weather	13°C (56°F)	119 mm (4.7 inches)	67%	extreme
June Weather	20°C (69°F)	42 mm (1.6 inches)	68%	extreme
July Weather	23°C (75°F)	31 mm (1.2 inches)	62%	extreme
August Weather	22°C (73°F)	43 mm (1.7 inches)	63%	extreme
September Weather	19°C (66°F)	27 mm (1.1 inches)	63%	very high
October Weather	9°C (49°F)	38 mm (1.5 inches)	72%	high
November Weather	4°C (40°F)	23 mm (0.9 inches)	79%	moderate
December Weather	0°C (33°F)	15 mm (0.6 inches)	85%	moderate