Last updated: June 24, 2025
In Hartley, United States, the average temperature in September hovers around 23°C (74°F), making for a pleasant climate. However, be prepared for a temperature range that can dip to 6°C (43°F) or spike up to a sizzling 45°C (113°F)! Fortunately, the area experiences minimal precipitation, with just 1 mm (0.0 in) over 0 days, and the average humidity remains comfortable at 44%.
In September in Hartley, the average temperature is 23°C (74°F). Maximums can reach 45°C (113°F) and minimums can be as low as 6°C (43°F). Be prepared for a wide range of temperatures when traveling, so bring both light clothing for the heat and warmer layers for cooler evenings.
In Hartley in September, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.
In Hartley in September humidity is 44%. With an average temperature of 23°C (74°F), this humidity feels like a comfortable embrace, making it pleasant for traveling and exploring the sights without feeling overly hot or sticky.
In Hartley in September, 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 Hartley.
UV Risk Categories
Weather in Hartley varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hartley, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 10°C (50°F) | 124 mm (4.9 inches) | 84% | moderate |
February Weather | 12°C (54°F) | 106 mm (4.2 inches) | 84% | moderate |
March Weather | 13°C (56°F) | 79 mm (3.1 inches) | 83% | high |
April Weather | 17°C (62°F) | 30 mm (1.2 inches) | 81% | very high |
May Weather | 20°C (68°F) | 18 mm (0.7 inches) | 74% | very high |
June Weather | 24°C (75°F) | 2 mm (0.1 inches) | 64% | extreme |
July Weather | 25°C (77°F) | 0 mm (0.0 inches) | 44% | extreme |
August Weather | 24°C (76°F) | 0 mm (0.0 inches) | 36% | very high |
September Weather | 23°C (74°F) | 1 mm (0.0 inches) | 44% | very high |
October Weather | 19°C (66°F) | 27 mm (1.1 inches) | 65% | high |
November Weather | 13°C (56°F) | 38 mm (1.5 inches) | 84% | moderate |
December Weather | 10°C (50°F) | 85 mm (3.3 inches) | 83% | moderate |