Last updated: June 24, 2025
In September, the average temperature in Alpine, United States hovers around 23°C (73°F), offering a pleasant climate. However, temperatures can vary significantly, with minimums reaching 8°C (46°F) and maximums soaring to 35°C (95°F). Expect precipitation of about 38 mm (1.5 in) across 7 days, complemented by an average humidity of 74%. Perfect for those seeking a diverse weather experience!
In September in Alpine, the average temperature is 23°C (73°F), with maximums reaching 35°C (95°F) and minimums dropping to 8°C (46°F). This range makes Alpine an ideal destination for travelers seeking pleasant weather and a variety of outdoor activities.
In Alpine in September, the precipitation amount is 38 mm (1.5 in) over the course of 7 days.
In Alpine in September humidity is 74%. With an average temperature of 23°C (73°F), this humidity feels like walking through a warm, enveloping fog, making outdoor activities more strenuous and requiring frequent breaks for hydration.
In Alpine in September, 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 Alpine.
UV Risk Categories
Weather in Alpine varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Alpine, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 7°C (46°F) | 12 mm (0.5 inches) | 76% | moderate |
February Weather | 10°C (51°F) | 9 mm (0.3 inches) | 74% | very high |
March Weather | 15°C (59°F) | 14 mm (0.6 inches) | 63% | very high |
April Weather | 19°C (66°F) | 12 mm (0.5 inches) | 61% | extreme |
May Weather | 24°C (75°F) | 16 mm (0.6 inches) | 68% | extreme |
June Weather | 26°C (80°F) | 31 mm (1.2 inches) | 70% | extreme |
July Weather | 26°C (79°F) | 38 mm (1.5 inches) | 70% | extreme |
August Weather | 26°C (78°F) | 44 mm (1.7 inches) | 67% | extreme |
September Weather | 23°C (73°F) | 38 mm (1.5 inches) | 74% | extreme |
October Weather | 18°C (65°F) | 19 mm (0.8 inches) | 75% | very high |
November Weather | 13°C (56°F) | 7 mm (0.3 inches) | 84% | high |
December Weather | 9°C (49°F) | 21 mm (0.8 inches) | 85% | moderate |