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The average temperature in Guarulhos over the whole year is 20°C. January is the hottest month, with highs of about 27°C; July is the coldest, with lows of about 13°C. The rainy (wet) season in Guarulhos runs from November to March, peaking in January with a 62% chance of rain on a given day. The dry season is April to October; August is the driest month, at 16%. Winds in Guarulhos are highest in November, averaging 2.7 m/s (10 km/h), and lightest in June, at 2.0 m/s (7 km/h). The prevailing wind is from the NE. The clearest skies in Guarulhos come in July, when the sky is typically 50% covered; October is the cloudiest month, at 75%.
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 27°C | 21°C | 28°C | 62% | 73% | 2.3 m/s | 40 | 59 | 13 |
| February | 27°C | 21°C | 28°C | 51% | 70% | 2.4 m/s | 43 | 62 | 12 |
| March | 27°C | 20°C | 28°C | 58% | 67% | 2.3 m/s | 41 | 64 | 12 |
| April | 25°C | 18°C | 25°C | 27% | 67% | 2.3 m/s | 67 | 48 | 31 |
| May | 23°C | 16°C | 22°C | 19% | 57% | 2.1 m/s | 77 | 26 | 55 |
| June | 21°C | 15°C | 20°C | 28% | 56% | 2.0 m/s | 82 | 18 | 65 |
| July | 21°C | 13°C | 20°C | 18% | 50% | 2.1 m/s | 77 | 15 | 67 |
| August | 22°C | 14°C | 20°C | 16% | 60% | 2.4 m/s | 71 | 24 | 59 |
| September | 25°C | 17°C | 24°C | 38% | 61% | 2.5 m/s | 63 | 39 | 40 |
| October | 25°C | 18°C | 25°C | 35% | 75% | 2.6 m/s | 66 | 42 | 37 |
| November | 25°C | 19°C | 24°C | 42% | 74% | 2.7 m/s | 67 | 42 | 37 |
| December | 27°C | 20°C | 28°C | 40% | 73% | 2.5 m/s | 48 | 59 | 15 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Year round, Guarulhos has days of about 21°C at their warmest in July, its coolest month, and 27°C in January, its warmest; the coolest hours of the day run from 13°C to 21°C through the year, and the average temperature over the year is 20°C around the clock. Rain is most likely around January and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Winter in Guarulhos has typical daily highs of about 21°C and lows of about 14°C, with a 21% chance of rain on a given day.
Spring in Guarulhos has typical daily highs of about 25°C and lows of about 18°C, with a 39% chance of rain on a given day.
Summer in Guarulhos has typical daily highs of about 27°C and lows of about 20°C, with a 51% chance of rain on a given day.
Autumn in Guarulhos has typical daily highs of about 25°C and lows of about 18°C, with a 35% chance of rain on a given day.
The rainy (wet) season in Guarulhos runs from November to March, peaking in January with a 62% chance of rain on a given day. The dry season is April to October; August is the driest month, at 16%.
Winds in Guarulhos are highest in November, averaging 2.7 m/s (10 km/h), and lightest in June, at 2.0 m/s (7 km/h). The prevailing wind is from the NE.
The average temperature in Guarulhos over the whole year is 20°C. January is the hottest month, with highs of about 27°C; July is the coldest, with lows of about 13°C.