Weather Comparison
Side-by-side weather comparison for September
| Metric | Los Angeles | Las Vegas | Better |
|---|---|---|---|
| Average HighHigher is warmer | 22°C (72°F) | 34°C (93°F)▲ | Las Vegas |
| Average LowHigher is milder | 13°C (55°F) | 21°C (70°F)▲ | Las Vegas |
| Rain DaysFewer is drier | 4 days | 1 days▲ | Las Vegas |
| PrecipitationLess is drier | 45 mm | 7 mm▲ | Las Vegas |
| Sunshine HoursMore is sunnier | 4h/day | 12h/day▲ | Las Vegas |
| HumidityLower is more comfortable | 65% | 65% | Tie |
| UV IndexLower is safer | 6 | 6 | Tie |
| Wind SpeedCalmer is better | 15 km/h▲ | 17 km/h | Los Angeles |
Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Las Vegas edges ahead as the better destination in September. Las Vegas offers 12 hours of daily sunshine with only 1 rain days, while Los Angeles sees 4 sunshine hours and 4 rain days.
Los Angeles sits in the comfortable travel range at 22°C. Las Vegas runs hot at 34°C.
For travelers who prioritize dry weather, Las Vegas is the stronger choice in September. Las Vegas receives 8 more hours of sunshine per day, which matters for sightseeing and outdoor activities.
Los Angeles reaches an average high of 22°C (72°F) and drops to 13°C (55°F) at night during September. The daily temperature range is 9°C, meaning moderate variation throughout the day.
Las Vegas averages 34°C (93°F) for the high and 21°C (70°F) for the low, with a daily range of 13°C. There is a notable 12°C gap between the two cities, so expect a very different feel.
Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.
Los Angeles receives approximately 45 mm of rainfall across 4 rain days during September. Rain is occasional, so a light rain jacket should suffice.
Las Vegas sees 7 mm over 1 rain days. That makes Las Vegas the drier option by 3 rain days and 38 mm of total precipitation.
Both cities share similar humidity levels at 65%.
Highs of 22°C, lows of 13°C, 4 rain days
Highs of 34°C, lows of 21°C, 1 rain days
The table below shows average high temperatures and rain days for every month. September is highlighted for quick reference.
| Month | Los Angeles | Las Vegas | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 16°C | 6d | 14°C | 4d |
| Feb | 19°C | 5d | 17°C | 5d |
| Mar | 22°C | 4d | 21°C | 3d |
| Apr | 26°C | 2d | 26°C | 2d |
| May | 28°C | 1d | 31°C | 1d |
| Jun | 29°C | 1d | 37°C | 1d |
| Jul | 28°C | 1d | 39°C | 2d |
| Aug | 26°C | 2d | 38°C | 2d |
| Sep | 22°C | 4d | 34°C | 1d |
| Oct | 19°C | 5d | 27°C | 2d |
| Nov | 16°C | 6d | 19°C | 2d |
| Dec | 15°C | 7d | 13°C | 3d |
Los Angeles Weather in September
Full forecast, packing tips, and activities
Las Vegas Weather in September
Full forecast, packing tips, and activities