Where to go in September
Where the weather is just right in September
In September, Johannesburg has the most just-right days (19 of 30), followed by Brisbane (16) and San Francisco (15).
Just right means 70 to 80°F highs, a dew point under 60°F and mostly sunny skies. Ranked among popular destinations and big US cities. See every place on the September map →
See the US-only September list →
| # | Place | Just-right days | Share | Avg high |
|---|---|---|---|---|
| 1 | Johannesburg South Africa | 19 | 64% | 77°F (25°C) |
| 2 | Brisbane Australia | 16 | 52% | 77°F (25°C) |
| 3 | San Francisco California | 15 | 50% | 76°F (24°C) |
| 4 | Chula Vista California | 12 | 40% | 75°F (24°C) |
| 5 | Nairobi Kenya | 11 | 37% | 74°F (23°C) |
| 6 | Portland Oregon | 11 | 36% | 76°F (24°C) |
| 7 | Sydney Australia | 11 | 35% | 70°F (21°C) |
| 8 | Porto Portugal | 10 | 34% | 74°F (23°C) |
| 9 | Oakland California | 10 | 34% | 81°F (27°C) |
| 10 | Madrid Spain | 10 | 34% | 79°F (26°C) |
| 11 | Split Croatia | 10 | 34% | 75°F (24°C) |
| 12 | Lisbon Portugal | 10 | 32% | 77°F (25°C) |
| 13 | Reno Nevada | 10 | 32% | 82°F (28°C) |
| 14 | Colorado Springs Colorado | 10 | 32% | 70°F (21°C) |
| 15 | Marseille France | 9 | 30% | 77°F (25°C) |
| 16 | Denver Colorado | 9 | 29% | 81°F (27°C) |
| 17 | Aurora Colorado | 9 | 29% | 81°F (27°C) |
| 18 | Tri-Cities Washington | 9 | 29% | 81°F (27°C) |
| 19 | Istanbul Turkey | 9 | 29% | 77°F (25°C) |
| 20 | Seattle Washington | 9 | 29% | 71°F (22°C) |
Cite this
In September, Johannesburg averages 19 just-right days (70 to 80°F highs, dry, mostly sunny), according to Goldilocks Map: https://goldilocksmap.com/where-to-go/september/Expected days in a typical September, from 1991 to 2020 climate normals. Method and accuracy. Updated 2026-10-07.