September in Monterrico brings high temperatures, with daytime highs of 30°C (86°F) and nights around 25°C (77°F). It's also the wettest month of the year, so an umbrella is a must.
September in Monterrico has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
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Pick a month to see the average temperature, rainfall and sunshine in Monterrico - and find the best time to visit.
43-year average (1976-2025)
Based on our historical records, temperatures in Monterrico typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are pleasant, with lows around 19°C (66°F).
43-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Monterrico spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Our historical data for Monterrico spans 2002 to 2025, revealing these weather 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 but pleasant conditions in Monterrico in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
See the full Monterrico 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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