Monrovia weather in September

September in Monrovia: hot, soaked, with clean air — a gamble, with 30 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Monrovia🇱🇷 Liberia · Gulf of Guinea · City51
  1. 72Jan
  2. 68Feb
  3. 63Mar
  4. 60Apr
  5. 49May
  6. 51Jun
  7. 54Jul
  8. 53Aug
  9. 51Sep
  10. 52Oct
  11. 65Nov
  12. 70Dec

#11 of 12 months in Monrovia · #1255 of 1413 destinations to visit in September · comfort 51/100 (tier D)

Days
27°C
Nights
23°C
Wet days
30
Sun
7.4 h
Humidity
91%
Daylight
12 h
Monrovia, Liberia
Photo: B. Aristotlè Guweh Jr · Pexels

Traveller notes on Monrovia in September

Other months in Monrovia

Detailed month-specific weather trip reports for Monrovia are scarce on the forum, with one general visitor review simply describing the city as hot, hot, hot and recommending mosquito repellent and appropriate clothing without specifying a particular month. Given the limited destination-specific detail, this note is grounded in the well-established regional pattern for coastal Liberia: July sits deep within West Africa's wet season here, with heavy, near-daily rainfall typical of this stretch of the Guinea coast, alongside consistently warm, humid conditions. Posters generally recommend rain gear and mosquito precautions as standard preparation for a Monrovia visit regardless of exact timing, with July specifically calling for genuine readiness for sustained, heavy rain.
Tripadvisor community · July · 1 month ago · Read more on Tripadvisor ↗
Forum posters describe Monrovia's climate in blunt terms - hot, hot, hot - with appropriate clothing and mosquito repellent both standard advice regardless of month. One business traveler specifically noted a January trip, though detailed weather specifics for that visit weren't part of the discussion. Given how few detailed trip reports exist for Monrovia specifically, the general West African coastal dry-season pattern (roughly November through March, cooler and less humid than the wetter months) is the most useful guide for a January visit, even though Monrovia's heat and humidity remain a constant regardless of season according to posters' broader impressions.
Tripadvisor community · January · 1 month ago · Read more on Tripadvisor ↗

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

Monrovia climate normals — September

Daytime high27°C / 81°F🥵 hot
Nighttime low23°C / 74°F
Feels like (high)32°C / 90°F
Sea temperature28°C / 82°F♨️ bath-warm
Rainfall642 mm / 25.3 in⛈ soaked
Rainy days30 days
Humidity91%💦 very humid
Dew point23°C / 74°F
Sunshine7.4 h/day
Daylight12.2 h
Wind15 km/h / 9 mph
Air quality (US AQI)34🍃 good

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

Crowds in Monrovia 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.

Quietschool holidays in 2 of the markets that fill it, one of its worst months for weather(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Best months for Monrovia'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).

Toughest weatherMonrovia's weather peaks December–February, best around January.

September coincides with Flooded streets in the rains.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Monrovia in September

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

  • Hazard

    Flooded streets in the rains

    1 Jun – 30 Sep · usuallyFlood season

    Heavy downpours overwhelm the drains in low-lying neighbourhoods, turning main roads into rivers and stalling traffic for hours. Roads out of the capital can be cut, so leave slack in any schedule and avoid overland trips at the peak. Source ↗

  • Season

    Wet season

    MonsoonRisk

    30 rainy days and about 642 mm in the month — the real kind of rainy season, not afternoon showers.

    from the climate normals

What's on around the world in September →

Where is Monrovia?

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Monrovia in September — FAQ

Is September a good time to visit Monrovia?
September in Monrovia: hot, soaked, with clean air — a gamble, with 30 rainy days. It ranks #11 of 12 months for Monrovia on SeasonMap's comfort score (51/100).
What is the weather like in Monrovia in September?
In September, Monrovia averages a daily high of 27.2°C and a low of 23.2°C, with about 641.7 mm of rain over roughly 29.9 rainy days.
What is the air quality in Monrovia in September?
Monrovia has a mean US Air Quality Index of about 34 in September.