October weather forecast
Boa Vista, Brazil

The weather during October continues to stabilize in Boa Vista. The dry season takes full effect with rainfall down to only 71mm (2.8"). Respectable high temperatures persist, but the wind speeds give a cooler sensation. The decrease in rainfall also corresponds with higher visibility, making the city a breathtaking sight. October's weather is predominantly dry and warm.

Temperature

Boa Vista's average high-temperature marks a still tropical 34°C (93.2°F) with the advent of October, closely mirroring that of the preceding month. During October, Boa Vista's temperature averages to a warm 24.2°C (75.6°F) at night.

Heat index

In October, the average heat index is appraised at a life-threatening hot 46°C (114.8°F). Note: Heat exhaustion and heat cramps are probable. Heatstroke can follow with prolonged activity.
Know that the heat index computations account for shaded terrains and slight winds. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', binds temperature metrics with humidity values to give a sense of the actual warmth. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The average relative humidity in October in Boa Vista, Brazil, is 68%.

Rainfall

In Boa Vista, in October, it is raining for 20.5 days, with typically 71mm (2.8") of accumulated precipitation. Throughout the year, in Boa Vista, there are 241.8 rainfall days, and 1216mm (47.87") of precipitation is accumulated.

Daylight

The average length of the day in October is 12h and 4min.
On the first day of October in Boa Vista, sunrise is at 05:49 and sunset at 17:54. On the last day of the month, sunrise is at 05:45 and sunset at 17:46 -04.

Sunshine

In Boa Vista, the average sunshine in October is 9.1h.

UV index

The months with the highest UV index are January through May, July through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: A daily maximum UV index of 7 in October translates into the following instructions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.