Climate averages 1991–2020
Retalhuleu weather
in January.
A hot, fairly dry month: the 4th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Retalhuleu: daytime highs average 30.0°C and nights cool to about 20.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 18 mm of rain on roughly 5 days, which makes January a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 22 min on an average January day.
The nearest other city in this atlas is Mazatenango (19 km away). In January its highs average 29.3°C, 0.7°C cooler than Retalhuleu, with 22 mm of rain.
Among the 23 cities listed in Guatemala, Retalhuleu ranks joint 1st of 23 for the warmest January highs and 16th of 23 for the driest January (rainfall, lowest first). The mean January high of those 23 cities is 24.6°C; Retalhuleu is 5.4°C warmer than that mean.
From January to February, average highs rise by 1.1°C to 31.1°C, and monthly rainfall falls from 18 mm to 15 mm.
The annual picture
January 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
Retalhuleu climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 30.0°C20.3°C | 20.3°C | 18 | 4.9 | 11.411 h |
| February | 31.1°C20.7°C | 20.7°C | 15 | 3.8 | 11.712 h |
| March | 31.6°C21.6°C | 21.6°C | 36 | 8.4 | 12.012 h |
| April | 31.5°C22.4°C | 22.4°C | 93 | 14.4 | 12.512 h |
| May | 29.8°C22.5°C | 22.5°C | 351 | 27.0 | 12.813 h |
| June | 28.5°C22.2°C | 22.2°C | 374 | 28.4 | 13.013 h |
| July | 28.9°C22.2°C | 22.2°C | 287 | 27.0 | 12.913 h |
| August | 28.8°C22.2°C | 22.2°C | 361 | 28.5 | 12.613 h |
| September | 28.1°C21.9°C | 21.9°C | 456 | 29.2 | 12.212 h |
| October | 27.7°C21.7°C | 21.7°C | 384 | 27.7 | 11.812 h |
| November | 28.3°C21.4°C | 21.4°C | 116 | 15.5 | 11.511 h |
| December | 29.2°C20.5°C | 20.5°C | 27 | 6.0 | 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
January in nearby cities
- Mazatenango in JanuaryGuatemala · 19 kmHigh 29.3°C · Low 19.2°C · 22 mm rain
- Coatepeque in JanuaryGuatemala · 27 kmHigh 27.7°C · Low 17.4°C · 49 mm rain
- Quetzaltenango in JanuaryGuatemala · 38 kmHigh 19.2°C · Low 11.6°C · 30 mm rain
- Totonicapán in JanuaryGuatemala · 54 kmHigh 19.1°C · Low 10.3°C · 8.9 mm rain
- Malacatán in JanuaryGuatemala · 58 kmHigh 28.2°C · Low 16.6°C · 30 mm rain
- Santa Lucía Cotzumalguapa in JanuaryGuatemala · 74 kmHigh 29.4°C · Low 18.0°C · 7.7 mm rain
- Tapachula in JanuaryMexico · 75 kmHigh 29.8°C · Low 18.8°C · 18 mm rain
- Chichicastenango in JanuaryGuatemala · 76 kmHigh 20.4°C · Low 11.1°C · 7.5 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 Retalhuleu) is explained once on the Retalhuleu year overview and on the Sources, method and limits page.