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The average temperature in Bom Princípio over the whole year is 18°C. January is the hottest month, with highs of about 27°C; July is the coldest, with lows of about 11°C. Bom Princípio has no sharply defined rainy season: the chance of rain on a given day runs from 41% in July, the driest month, to 60% in October, the wettest. Winds in Bom Princípio are highest in October, averaging 3.1 m/s (11 km/h), and lightest in May, at 2.5 m/s (9 km/h). The prevailing wind is from the NW. The clearest skies in Bom Princípio come in February, when the sky is typically 51% covered; September is the cloudiest month, at 66%.
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 27°C | 20°C | 27°C | 55% | 53% | 3.0 m/s | 50 | 53 | 20 |
| February | 26°C | 19°C | 27°C | 44% | 51% | 2.8 m/s | 51 | 54 | 22 |
| March | 25°C | 18°C | 25°C | 46% | 57% | 2.7 m/s | 61 | 46 | 32 |
| April | 22°C | 16°C | 21°C | 41% | 58% | 2.7 m/s | 74 | 25 | 57 |
| May | 18°C | 13°C | 17°C | 51% | 59% | 2.5 m/s | 61 | 8 | 73 |
| June | 16°C | 11°C | 14°C | 50% | 62% | 2.7 m/s | 46 | 5 | 71 |
| July | 16°C | 11°C | 14°C | 41% | 57% | 2.7 m/s | 45 | 4 | 70 |
| August | 17°C | 12°C | 15°C | 50% | 55% | 2.7 m/s | 53 | 7 | 71 |
| September | 19°C | 14°C | 18°C | 56% | 66% | 3.0 m/s | 65 | 12 | 70 |
| October | 21°C | 15°C | 20°C | 60% | 62% | 3.1 m/s | 72 | 16 | 65 |
| November | 23°C | 17°C | 22°C | 45% | 55% | 3.1 m/s | 72 | 32 | 49 |
| December | 26°C | 19°C | 25°C | 47% | 55% | 3.1 m/s | 58 | 46 | 31 |
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, Bom Princípio has days of about 16°C at their warmest in July, its coolest month, and 27°C in January, its warmest; the coolest hours of the day run from 11°C to 20°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around October and least likely around July. 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 Bom Princípio has typical daily highs of about 16°C and lows of about 11°C, with a 47% chance of rain on a given day.
Spring in Bom Princípio has typical daily highs of about 21°C and lows of about 15°C, with a 54% chance of rain on a given day.
Summer in Bom Princípio has typical daily highs of about 26°C and lows of about 19°C, with a 49% chance of rain on a given day.
Autumn in Bom Princípio has typical daily highs of about 21°C and lows of about 16°C, with a 46% chance of rain on a given day.
Bom Princípio has no sharply defined rainy season: the chance of rain on a given day runs from 41% in July, the driest month, to 60% in October, the wettest.
Winds in Bom Princípio are highest in October, averaging 3.1 m/s (11 km/h), and lightest in May, at 2.5 m/s (9 km/h). The prevailing wind is from the NW.
The average temperature in Bom Princípio over the whole year is 18°C. January is the hottest month, with highs of about 27°C; July is the coldest, with lows of about 11°C.