During September, Mariscos experiences very high daytime temperatures of 32°C (90°F) and cooler nights around 23°C (73°F). September sits within the rainy season, so expect regular and often heavy rainfall.
September in Mariscos 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 Mariscos - and find the best time to visit.
44-year average (1978-2025)
Based on our historical records, temperatures in Mariscos typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 21°C (70°F).
44-year average (1978-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Mariscos spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on 29 years of weather observations in Mariscos between 1996 and 2025, these are the recorded extremes.
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).
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
See the full Mariscos 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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