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Chetumal, Quintana Roo climate
Aw Tropical savanna (dry winter)
Chetumal has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is August with an average daily high near 34°C, while the coldest is January averaging around 19°C at night. Precipitation totals about 1351 mm a year and is strongly seasonal — October alone averages 208 mm while March barely receives 28 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)Chetumal climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 30 | 31 | 33 | 33 | 33 | 33 | 34 | 33 | 32 | 31 | 30 |
| Avg temp (°C) | 24 | 25 | 27 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 26 | 25 |
| Avg low (°C) | 19 | 21 | 22 | 24 | 25 | 26 | 25 | 25 | 25 | 24 | 21 | 20 |
| Precipitation (mm) | 74 | 32 | 28 | 53 | 117 | 196 | 128 | 153 | 186 | 208 | 114 | 63 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 30 | 31 | 33 | 33 | 33 |
| Avg temp (°C) | 24 | 25 | 27 | 28 | 29 | 29 |
| Avg low (°C) | 19 | 21 | 22 | 24 | 25 | 26 |
| Precipitation (mm) | 74 | 32 | 28 | 53 | 117 | 196 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 33 | 34 | 33 | 32 | 31 | 30 |
| Avg temp (°C) | 29 | 29 | 29 | 28 | 26 | 25 |
| Avg low (°C) | 25 | 25 | 25 | 24 | 21 | 20 |
| Precipitation (mm) | 128 | 153 | 186 | 208 | 114 | 63 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 52 | 47 | 42 | 45 | 56 | 68 | 60 | 59 | 64 | 59 | 49 | 47 |
| Relative humidity (%) | 78 | 74 | 70 | 70 | 73 | 80 | 80 | 80 | 83 | 85 | 83 | 80 |
| Wind speed (mph) | 4.4 | 4.6 | 4.8 | 4.9 | 4.7 | 4.7 | 4.4 | 4.2 | 3.8 | 4.0 | 4.3 | 4.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 52 | 47 | 42 | 45 | 56 | 68 |
| Relative humidity (%) | 78 | 74 | 70 | 70 | 73 | 80 |
| Wind speed (mph) | 4.4 | 4.6 | 4.8 | 4.9 | 4.7 | 4.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 59 | 64 | 59 | 49 | 47 |
| Relative humidity (%) | 80 | 80 | 83 | 85 | 83 | 80 |
| Wind speed (mph) | 4.4 | 4.2 | 3.8 | 4.0 | 4.3 | 4.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from CONAGUA / SMN, Mexico's national weather service, measured at Tecnologico Chetumal, inside the city.
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.