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Guastatoya, Guatemala climate
Aw Tropical savanna (dry winter)
Guastatoya has a remarkably steady warm-temperate climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is May with an average daily high near 27°C, while the coldest is January averaging around 13°C at night. Precipitation totals about 749 mm a year and is strongly seasonal — August alone averages 182 mm while January barely receives 3 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Guastatoya climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 24 | 25 | 26 | 27 | 27 | 25 | 25 | 26 | 25 | 24 | 24 | 24 |
| Avg temp (°C) | 18 | 20 | 20 | 22 | 22 | 21 | 21 | 21 | 21 | 20 | 19 | 19 |
| Avg low (°C) | 13 | 14 | 14 | 16 | 17 | 17 | 17 | 17 | 17 | 16 | 15 | 14 |
| Precipitation (mm) | 3 | 6 | 17 | 19 | 86 | 140 | 140 | 182 | — | 130 | 19 | 9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 24 | 25 | 26 | 27 | 27 | 25 |
| Avg temp (°C) | 18 | 20 | 20 | 22 | 22 | 21 |
| Avg low (°C) | 13 | 14 | 14 | 16 | 17 | 17 |
| Precipitation (mm) | 3 | 6 | 17 | 19 | 86 | 140 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 26 | 25 | 24 | 24 | 24 |
| Avg temp (°C) | 21 | 21 | 21 | 20 | 19 | 19 |
| Avg low (°C) | 17 | 17 | 17 | 16 | 15 | 14 |
| Precipitation (mm) | 140 | 182 | — | 130 | 19 | 9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 37 | 41 | 52 | 73 | 78 | 72 | 74 | 79 | 69 | 49 | 36 |
| Relative humidity (%) | 73 | 67 | 63 | 66 | 75 | 84 | 83 | 84 | 87 | 87 | 83 | 79 |
| Wind speed (m/s) | 2.5 | 2.3 | 2.2 | 1.8 | 1.5 | 1.4 | 1.6 | 1.4 | 1.3 | 1.5 | 2.2 | 2.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 37 | 41 | 52 | 73 | 78 |
| Relative humidity (%) | 73 | 67 | 63 | 66 | 75 | 84 |
| Wind speed (m/s) | 2.5 | 2.3 | 2.2 | 1.8 | 1.5 | 1.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 74 | 79 | 69 | 49 | 36 |
| Relative humidity (%) | 83 | 84 | 87 | 87 | 83 | 79 |
| Wind speed (m/s) | 1.6 | 1.4 | 1.3 | 1.5 | 2.2 | 2.4 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at LA Aurora, a weather station, about 58 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.