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Tonalá, Chiapas climate
Aw Tropical savanna (dry winter)
Tonalá has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is May with an average daily high near 98°F, while the coldest is January averaging around 68°F at night. Precipitation totals about 65 inches a year and is strongly seasonal — June alone averages 14.3 inches while January barely receives 0.03 inches.
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)Tonalá climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 92 | 94 | 97 | 99 | 98 | 95 | 96 | 96 | 94 | 93 | 92 | 92 |
| Avg temp (°F) | 80 | 81 | 83 | 85 | 86 | 84 | 85 | 85 | 83 | 83 | 82 | 81 |
| Avg low (°F) | 68 | 69 | 70 | 72 | 74 | 73 | 73 | 73 | 73 | 73 | 72 | 70 |
| Precipitation (in) | 0.0 | 0.1 | 0.2 | 1.1 | 6.1 | 14.3 | 9.8 | 12.1 | 14.1 | 5.8 | 1.6 | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 92 | 94 | 97 | 99 | 98 | 95 |
| Avg temp (°F) | 80 | 81 | 83 | 85 | 86 | 84 |
| Avg low (°F) | 68 | 69 | 70 | 72 | 74 | 73 |
| Precipitation (in) | 0.0 | 0.1 | 0.2 | 1.1 | 6.1 | 14.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 96 | 96 | 94 | 93 | 92 | 92 |
| Avg temp (°F) | 85 | 85 | 83 | 83 | 82 | 81 |
| Avg low (°F) | 73 | 73 | 73 | 73 | 72 | 70 |
| Precipitation (in) | 9.8 | 12.1 | 14.1 | 5.8 | 1.6 | 0.1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 45 | 40 | 36 | 40 | 60 | 77 | 72 | 73 | 80 | 67 | 50 | 44 |
| Relative humidity (%) | 68 | 65 | 62 | 64 | 70 | 80 | 80 | 82 | 85 | 83 | 79 | 73 |
| Wind speed (mph) | 9.6 | 8.5 | 7.9 | 7.0 | 5.6 | 4.5 | 4.2 | 4.3 | 4.7 | 6.8 | 9.1 | 9.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 45 | 40 | 36 | 40 | 60 | 77 |
| Relative humidity (%) | 68 | 65 | 62 | 64 | 70 | 80 |
| Wind speed (mph) | 9.6 | 8.5 | 7.9 | 7.0 | 5.6 | 4.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 73 | 80 | 67 | 50 | 44 |
| Relative humidity (%) | 80 | 82 | 85 | 83 | 79 | 73 |
| Wind speed (mph) | 4.2 | 4.3 | 4.7 | 6.8 | 9.1 | 9.0 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from CONAGUA / SMN, Mexico's national weather service, measured at Arriaga (dge), about 24 km from the city centre.
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.