Climate averages 1991–2020
Santa Lucía Cotzumalguapa weather
in September.
A warm, very wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Santa Lucía Cotzumalguapa: daytime highs average 26.6°C and nights cool to about 19.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 374 mm of rain on roughly 29 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 13 min on an average September day.
The nearest other city in this atlas is Escuintla (26 km away). In September its highs average 27.5°C, 0.9°C warmer than Santa Lucía Cotzumalguapa, with 421 mm of rain.
Among the 23 cities listed in Guatemala, Santa Lucía Cotzumalguapa ranks 8th of 23 for the warmest September highs and 16th of 23 for the driest September (rainfall, lowest first). The mean September high of those 23 cities is 24.7°C; Santa Lucía Cotzumalguapa is 2.0°C warmer than that mean.
From September to October, average highs fall by 0.1°C to 26.5°C, and monthly rainfall falls from 374 mm to 336 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Santa Lucía Cotzumalguapa climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.4°C18.0°C | 18.0°C | 7.7 | 2.3 | 11.411 h |
| February | 30.4°C18.4°C | 18.4°C | 6.4 | 1.9 | 11.712 h |
| March | 30.9°C19.3°C | 19.3°C | 18 | 5.5 | 12.012 h |
| April | 30.5°C20.2°C | 20.2°C | 58 | 12.5 | 12.412 h |
| May | 28.4°C20.5°C | 20.5°C | 248 | 26.0 | 12.813 h |
| June | 27.1°C20.0°C | 20.0°C | 336 | 28.5 | 13.013 h |
| July | 27.6°C19.6°C | 19.6°C | 256 | 28.1 | 12.913 h |
| August | 27.4°C19.7°C | 19.7°C | 294 | 29.3 | 12.613 h |
| September, selected | 26.6°C19.5°C | 19.5°C | 374 | 29.4 | 12.212 h |
| October | 26.5°C19.1°C | 19.1°C | 336 | 27.6 | 11.812 h |
| November | 27.3°C18.5°C | 18.5°C | 101 | 15.6 | 11.511 h |
| December | 28.4°C18.0°C | 18.0°C | 17 | 4.5 | 11.311 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Escuintla in SeptemberGuatemala · 26 kmHigh 27.5°C · Low 19.6°C · 421 mm rain
- Chimaltenango in SeptemberGuatemala · 42 kmHigh 22.4°C · Low 15.0°C · 204 mm rain
- Villa Nueva in SeptemberGuatemala · 52 kmHigh 24.6°C · Low 16.7°C · 322 mm rain
- Villa Canales in SeptemberGuatemala · 55 kmHigh 25.2°C · Low 17.1°C · 322 mm rain
- Mazatenango in SeptemberGuatemala · 56 kmHigh 27.1°C · Low 20.5°C · 542 mm rain
- San Juan Sacatepéquez in SeptemberGuatemala · 59 kmHigh 22.6°C · Low 13.8°C · 204 mm rain
- Santa Catarina Pinula in SeptemberGuatemala · 62 kmHigh 23.9°C · Low 15.5°C · 322 mm rain
- Chichicastenango in SeptemberGuatemala · 68 kmHigh 20.8°C · Low 14.0°C · 265 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Santa Lucía Cotzumalguapa) is explained once on the Santa Lucía Cotzumalguapa year overview and on the Sources, method and limits page.