Griffith in September
September in Griffith is peak spring, and the weather reflects it. You're looking at average daily highs of 19.9 degrees.
Daytime highs average 19.9 degrees, dropping to 8.0 degrees overnight. That's a 12-degree swing between day and night. Manageable with a decent layer, and you'll warm up by midday.
September is 3.9 degrees cooler than Griffith's yearly average.
Rainfall in September averages 25mm over about 4 days. That means roughly a 13% chance of rain on any given day, so you can leave the umbrella at the hotel.
Sunshine-wise, September delivers around 18.4 MJ/m2 of daily solar radiation. UV sits in the very high category. You'll want SPF 50+ and a decent hat.
The Comfort Score for September comes in at 7.8/10, solidly pleasant.
Packing tip: bring layers you can peel on and off, and SPF 50+ sunscreen and a hat.
Check the data table below for the full picture, or compare Griffith in September with another destination.
September at a Glance
Temperature Range
Daily temperature range in September. The bar shows the typical spread between overnight lows and afternoon highs.
What to Pack
- Layered clothing for mild to cool conditions
- A warm jumper or fleece for cool mornings and evenings
- Sunscreen (SPF 30+) and sunglasses for UV protection
Coming From Overseas?
How September in Griffith stacks up against major cities around the world.
About 0 degrees cooler and considerably drier.
About 6 degrees cooler and considerably drier.
About 7 degrees cooler and considerably drier.
How September Compares
Griffith's monthly climate at a glance. September is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 31.0 | 19.2 | 71mm | 5.8 |
| Feb | 32.7 | 18.5 | 37mm | 5.1 |
| Mar | 30.8 | 17.2 | 26mm | 6.3 |
| Apr | 21.8 | 10.3 | 50mm | 8.6 |
| May | 18.3 | 7.8 | 103mm | 5.4 |
| Jun | 14.1 | 4.7 | 20mm | 2.4 |
| Jul | 13.8 | 5.3 | 35mm | 2.2 |
| Aug | 17.9 | 7.3 | 29mm | 5.7 |
| Sep | 19.9 | 8.0 | 25mm | 7.8 |
| Oct | 24.5 | 11.5 | 23mm | 10.0 |
| Nov | 29.7 | 15.7 | 81mm | 6.6 |
| Dec | 31.7 | 17.8 | 26mm | 5.8 |