Last updated: June 24, 2025
In September, the average temperature in Upland, United States hovers around 22°C (71°F), offering a delightful climate for exploration. Visitors can expect a range from a cool 7°C (45°F) to a warm 34°C (94°F), catering to various preferences. With an average precipitation of 100 mm (3.9 in) spread over 11 days, it's wise to pack an umbrella. Humidity levels are around 75%, adding a touch of tropical ambiance to your stay!
In September in Upland, the average temperature is 22°C (71°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop to as low as 7°C (45°F). This varied climate makes Upland an ideal destination for travelers seeking both warm days and cooler evenings.
In Upland in September, the precipitation amount is 100 mm (3.9 in) over the course of 11 days.
In Upland in September, humidity is 75%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making traveling a bit sticky but also invigorating, as the air surrounds you with a heavy yet refreshing sensation that highlights the vibrant atmosphere of your surroundings.
In Upland in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Upland.
UV Risk Categories
Weather in Upland varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Upland, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (36°F) | 64 mm (2.5 inches) | 84% | moderate |
| February Weather | 4°C (39°F) | 103 mm (4.1 inches) | 83% | moderate |
| March Weather | 7°C (45°F) | 106 mm (4.2 inches) | 83% | high |
| April Weather | 13°C (55°F) | 105 mm (4.1 inches) | 81% | very high |
| May Weather | 18°C (65°F) | 135 mm (5.3 inches) | 78% | very high |
| June Weather | 23°C (74°F) | 118 mm (4.7 inches) | 79% | very high |
| July Weather | 26°C (79°F) | 136 mm (5.4 inches) | 74% | very high |
| August Weather | 25°C (77°F) | 140 mm (5.5 inches) | 72% | very high |
| September Weather | 22°C (71°F) | 100 mm (3.9 inches) | 75% | very high |
| October Weather | 16°C (61°F) | 109 mm (4.3 inches) | 81% | high |
| November Weather | 8°C (47°F) | 83 mm (3.3 inches) | 85% | moderate |
| December Weather | 4°C (40°F) | 100 mm (3.9 inches) | 84% | moderate |