Lake Atitlan in September averages 23°C (73°F) during the day and 16°C (61°F) at night. This is the wettest month of the year.
September in Lake Atitlan has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
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Pick a month to see the average temperature, rainfall and sunshine in Lake Atitlan - and find the best time to visit.
40-year average (1976-2025)
Based on our historical records, temperatures in Lake Atitlan typically stay consistent throughout September, with daily highs averaging around 23°C (73°F). Nights are pleasant, with lows around 15°C (59°F).
Browse day-by-day weather records for Lake Atitlan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
The extremes listed below come from historical weather data collected in Lake Atitlan from 2002 through 2026.
Find out more about the weather in Guatemala and which places have the best travel conditions in this month. See all of Guatemala in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Lake Atitlan climate overview or explore weather in Guatemala.
Where to go in September - average daytime high across popular destinations.
Flores
34°C (93°F) Rio Dulce Town32°C (90°F) Lívingston32°C (90°F) Cobán27°C (81°F) Guatemala City27°C (81°F) Antigua Guatemala25°C (77°F) Quetzaltenango22°C (72°F) Panajachel23°C (73°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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