Brazzaville weather in September

September in Brazzaville: sweltering, dry — fine if you can take 35°C afternoons.

Updated September 2026 · climate normals from ERA5 reanalysis

Brazzaville🇨🇬 Congo · Central Africa · City75
  1. 65Jan
  2. 63Feb
  3. 61Mar
  4. 58Apr
  5. 67May
  6. 78Jun
  7. 82Jul
  8. 80Aug
  9. 75Sep
  10. 65Oct
  11. 55Nov
  12. 59Dec

#4 of 12 months in Brazzaville · #841 of 1413 destinations to visit in September · comfort 75/100 (tier B)

Days
32°C
Nights
23°C
Wet days
5
Sun
9.3 h
Humidity
68%
Daylight
12 h
Brazzaville, Congo
Photo: Africany · CC0

Traveller notes on Brazzaville in September

Other months in Brazzaville

Detailed month-specific weather trip reports for Brazzaville are essentially absent from the forum, with most discussion instead focused on visa requirements, vaccinations against hepatitis, typhoid and yellow fever, and malaria precautions rather than granular climate detail. Given the limited destination-specific weather coverage, this note is grounded in the well-established regional pattern for this part of equatorial Central Africa: January sits within the warmer, wetter half of the year here, with consistently hot, humid conditions and frequent rain typical of the Congo Basin's tropical climate. Posters generally emphasize health precautions - vaccinations and malaria prevention - as the more pressing planning concern for a Brazzaville visit than the specific month chosen.
Tripadvisor community · January · 1 month ago · Read more on Tripadvisor ↗
Forum posters confirm July sits within the Congo Basin's dry season (roughly June through September), a period locals and regular visitors describe as the easier, more reliable window for travel around Brazzaville compared to the wetter months. Posters report positive July experiences here, including a multi-day safari-style trip into the wider Congo region praised as a highlight of their visit. The dry season's near-total lack of rain does come with real heat and humidity by afternoon, a genuine tropical Congo Basin climate rather than an arid one, so posters generally recommend light, breathable clothing alongside sun protection for a July visit despite the dry-season framing.
Tripadvisor community · July · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Brazzaville's card on the map.

Brazzaville climate normals — September

Daytime high32°C / 90°F🔥 sweltering
Nighttime low23°C / 73°F
Feels like (high)35°C / 95°F
Rainfall17 mm / 0.7 in☀️ dry
Rainy days5 days
Humidity68%💧 humid
Dew point20°C / 68°F
Sunshine9.3 h/day
Daylight12.1 h
Wind11 km/h / 7 mph
Air quality (US AQI)82🙂 moderate

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Brazzaville in September

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Best months for Brazzaville's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherBrazzaville's weather peaks June–August, best around July.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Brazzaville in September

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    The long dry season

    1 Jun – 20 Sep · usually

    Four months when the rain simply stops. It is cooler and often overcast rather than blue, the dust comes back to the unsealed streets, and it is the stretch when the roads out towards the Pool are dependable.

What's on around the world in September →

Nearby, and something's on

Within 300 km of Brazzaville — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Brazzaville?

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Brazzaville in September — FAQ

Is September a good time to visit Brazzaville?
September in Brazzaville: sweltering, dry — fine if you can take 35°C afternoons. It ranks #4 of 12 months for Brazzaville on SeasonMap's comfort score (75/100).
What is the weather like in Brazzaville in September?
In September, Brazzaville averages a daily high of 32.1°C and a low of 22.5°C, with about 17.2 mm of rain over roughly 4.7 rainy days.
What is the air quality in Brazzaville in September?
Brazzaville has a mean US Air Quality Index of about 82 in September.

Within 300 km: Kinshasa's The dry season around 1 Jun – 15 Sep.