September sees gradually warmer daytime temperatures and continued dry conditions - another excellent month for visiting both highland and lowland attractions. Tourist numbers remain steady, especially for Uyuni and La Paz. Nights remain cool at altitude, so warm layers are recommended.
Average daily low and high (°C) and monthly rainfall. The badge shows how it feels, allowing for humidity.
Average temperature across Bolivia in September.
La Paz, El Alto, Uyuni, Potosí
September initiates a slow warming trend: mornings are crisp, afternoons pleasantly mild, and wind picks up across open salt and puna grasslands. Blooming shrubs and increased daylight make trekking less arduous than mid‑winter, and paved roads are reliably clear. Travelers will notice fewer crowds than peak season but should still plan for cool nights and bright daytime sun.
Cochabamba, Sucre, Tarija
September brings a gentle warming and the first signs of atmospheric change: afternoons slowly regain more humidity though significant storms are uncommon. Trailside wildflowers start to appear and lowland access routes begin to look greener ahead of the rains. For travelers wanting a mix of warm days, cool nights and quieter sights, this is a flexible month for valley itineraries.
Coroico, La Cumbre, Caranavi
September introduces a slow increase in humidity as spring arrives; occasional short showers reappear late in the month but they rarely last the day. Trails begin to green again and rivers rise slightly, improving waterfall flows for photographers. Visitors will find moderate crowds-Bolivians also travel more at this time-so book jungle lodges in advance if specific dates are required.
Rurrenabaque, Trinidad, Guayaramerín
September sees a slow build of humidity but remains largely dry; river channels are at their lowest exposing expansive riverbanks and wetlands. This month is excellent for spotting the large mammals and birds of the pampas as they concentrate on waterholes. Road dust can be an issue on long transfers-light scarves and eye protection help-and lodge-based hides remain busy.
Santa Cruz de la Sierra, Sama Valley, Yacuíba
September signals the start of the pre‑monsoon warming: days get hotter and occasional dust storms or smoky haze from controlled burns can appear in agricultural zones. Rivers are at their lowest, exposing mudflats and making some boat tours less rewarding, while dry grassy plains make wildlife easier to spot at remaining waterholes. Travelers should be prepared for hot afternoons and dust on long drives.
There are no major festivals or events in Bolivia during September to be aware of.
See how September compares with the rest of the year, then read the full guide.