Lake Atitlan Weather in September
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.
Rainfall in Lake Atitlan in September
Lake Atitlan is in the rainy season in September, with rain on around 25 days and an average of 412 mm (16 in). The rain this month falls heavily when it arrives, so waterproofs are worth keeping handy.
Temperature in Lake Atitlan in September
Daytime highs in Lake Atitlan in September reach 23°C (73°F), with nights around 16°C (61°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Lake Atitlan in September
The area enjoys a moderate level of sunlight, with around 155 hours. It's a good balance between sunny and rainy days.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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Guatemala, check out our Lake Atitlan's climate page.
Lake Atitlan Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
23°C (73°F)
Chance of Rain
82%
Precipitation
412 mm (16 in)
Rainy days
25 days
Humidity
81% *
Sunshine
155 hours *
Percentage Sunshine
*
Daily Historical Temperatures
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).
Average temperatures in September
Historical weather for Lake Atitlan in September
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.
Lake Atitlan historical weather extremes in September
The extremes listed below come from historical weather data collected in Lake Atitlan from 2002 through 2025.
- Lake Atitlan recorded its highest September temperature of 31°C (88°F) on September 1, 2025.
- Lake Atitlan experienced its chilliest September day on September 3, 2010, reaching only 18°C (64°F).
- Nighttime temperatures dropped to 9°C (48°F) on September 18, 2012, marking the coldest September night on record.
Best Places in Guatemala in September
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
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unpleasant
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What to Wear in Lake Atitlan in September
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.What To Do in Lake Atitlan in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Guatemala, check out our Lake Atitlan's climate page.
Temperature Rainfall Sunshine Humidity
See the full Lake Atitlan climate overview or explore weather in Guatemala.
