Boa Vista weather in September 2025

Expect 91°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Boa Vista in September. Check more long-term weather averages for Boa Vista in September before you book your next holiday to Brazil in 2025/2026.

  • 91°F maximum daytime temperature in September in Boa Vista91
    91°F max day temperature
  • 8 hours of sunshine per day
  • 14 days with some rainfall in September in Boa Vista14
    14 days with some rainfall
  • 73°F minimum night-time temperature in September in Boa Vista73
    73°F min night temperature
  • 12 hours of daylight per day in September in Boa Vista12
    12 hours of daylight per day
  • Very high heat & humidity in September in Boa VistaVH
    Very High heat & humidity
  • 3.7 inches monthly rainfall in September in Boa Vista3.7
    3.7 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Boa Vista11
    11+ (Extreme) UV index

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The September weather guide for Brazil (Boa Vista) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Boa Vista in September?

Daytime temperatures usually reach 91°F in Boa Vista in September with very high heat and humidity, falling to 73°F at night.

How sunny is it in Boa Vista in September?

There are normally 8 hours of bright sunshine each day in Boa Vista in September - that's 62% of daylight hours.

Does it rain in Boa Vista in September?

There are usually 14 days with some rain in Boa Vista in September and the average monthly rainfall is 3.7 inches.

Boa Vista September sunrise & sunset times

Browse the sunrise and sunset times for Boa Vista in September 2025. Select a month to view Boa Vista sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:58 18:07
Monday, 15th September 2025 05:54 18:01
Tuesday, 30th September 2025 05:50 17:55

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