Climate averages 1991–2020
Chimaltenango weather
in September.
A warm, very wet month: the 9th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Chimaltenango: daytime highs average 22.4°C and nights cool to about 15.0°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 204 mm of rain on roughly 24 days, which makes September a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 13 min on an average September day.
The nearest other city in this atlas is San Juan Sacatepéquez (20 km away). In September its highs average 22.6°C, about as warm as Chimaltenango, with 204 mm of rain.
Among the 23 cities listed in Guatemala, Chimaltenango ranks 17th of 23 for the warmest September highs and joint 1st of 23 for the driest September (rainfall, lowest first). The mean September high of those 23 cities is 24.7°C; Chimaltenango is 2.3°C cooler than that mean.
From September to October, average highs fall by 0.6°C to 21.7°C, and monthly rainfall falls from 204 mm to 152 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
Chimaltenango climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.5°C12.1°C | 12.1°C | 6.3 | 1.8 | 11.411 h |
| February | 24.1°C12.6°C | 12.6°C | 5.1 | 1.3 | 11.712 h |
| March | 25.2°C13.5°C | 13.5°C | 15 | 3.8 | 12.012 h |
| April | 25.5°C14.7°C | 14.7°C | 51 | 7.9 | 12.512 h |
| May | 24.1°C15.4°C | 15.4°C | 132 | 17.7 | 12.813 h |
| June | 22.5°C15.2°C | 15.2°C | 221 | 23.9 | 13.013 h |
| July | 22.7°C14.7°C | 14.7°C | 116 | 17.3 | 12.913 h |
| August | 23.0°C14.9°C | 14.9°C | 136 | 19.1 | 12.613 h |
| September, selected | 22.4°C15.0°C | 15.0°C | 204 | 24.1 | 12.212 h |
| October | 21.7°C14.5°C | 14.5°C | 152 | 19.0 | 11.812 h |
| November | 21.5°C13.3°C | 13.3°C | 41 | 7.1 | 11.511 h |
| December | 22.0°C12.5°C | 12.5°C | 13 | 2.8 | 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
- San Juan Sacatepéquez in SeptemberGuatemala · 20 kmHigh 22.6°C · Low 13.8°C · 204 mm rain
- Villa Nueva in SeptemberGuatemala · 29 kmHigh 24.6°C · Low 16.7°C · 322 mm rain
- Santa Catarina Pinula in SeptemberGuatemala · 36 kmHigh 23.9°C · Low 15.5°C · 322 mm rain
- Villa Canales in SeptemberGuatemala · 37 kmHigh 25.2°C · Low 17.1°C · 322 mm rain
- Escuintla in SeptemberGuatemala · 40 kmHigh 27.5°C · Low 19.6°C · 421 mm rain
- Santa Lucía Cotzumalguapa in SeptemberGuatemala · 42 kmHigh 26.6°C · Low 19.5°C · 374 mm rain
- Chichicastenango in SeptemberGuatemala · 44 kmHigh 20.8°C · Low 14.0°C · 265 mm rain
- San José Pinula in SeptemberGuatemala · 46 kmHigh 21.7°C · Low 13.6°C · 322 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 Chimaltenango) is explained once on the Chimaltenango year overview and on the Sources, method and limits page.
San Juan Sacatepéquez lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.