Last updated: June 24, 2025
In September, the average temperature in La Crescenta-Montrose, United States is a warm 23°C (74°F). Expect temperatures to vary, with minimums dipping to 10°C (51°F) and maximums soaring to 44°C (112°F). With only 4 mm (0.1 in) of precipitation over 0 days, the region enjoys a relatively dry atmosphere, complemented by an average humidity of 48%.
In September in La Crescenta-Montrose, the average temperature is 23°C (74°F). Maximums can reach 44°C (112°F) and minimums can be as low as 10°C (51°F). Travelers should be prepared for a wide range of temperatures during this time, ensuring they pack accordingly for both warm daytime and cooler evening conditions.
In La Crescenta-Montrose in September, the precipitation amount is 4 mm (0.1 in) recorded over a span of 0 days.
In La Crescenta-Montrose in September humidity is 48%. With an average temperature of 23°C (74°F), this humidity feels like a refreshing but slightly muggy embrace, making traveling enjoyable with a light breeze, yet prompting travelers to stay hydrated and take occasional breaks from the sun.
In La Crescenta-Montrose in September, 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 La Crescenta-Montrose.
UV Risk Categories
Weather in La Crescenta-Montrose varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Crescenta-Montrose, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 12°C (53°F) | 75 mm (3.0 inches) | 78% | moderate |
| February Weather | 12°C (54°F) | 65 mm (2.6 inches) | 82% | high |
| March Weather | 13°C (56°F) | 85 mm (3.4 inches) | 75% | very high |
| April Weather | 17°C (62°F) | 22 mm (0.9 inches) | 68% | very high |
| May Weather | 18°C (64°F) | 16 mm (0.6 inches) | 57% | extreme |
| June Weather | 22°C (71°F) | 1 mm (0.1 inches) | 52% | extreme |
| July Weather | 25°C (77°F) | 2 mm (0.1 inches) | 46% | extreme |
| August Weather | 25°C (78°F) | 2 mm (0.1 inches) | 39% | extreme |
| September Weather | 23°C (74°F) | 4 mm (0.1 inches) | 48% | very high |
| October Weather | 20°C (68°F) | 9 mm (0.4 inches) | 59% | high |
| November Weather | 16°C (61°F) | 24 mm (0.9 inches) | 72% | moderate |
| December Weather | 12°C (53°F) | 77 mm (3.1 inches) | 76% | moderate |