Porto-Novo in Fall
In fall (September, October and November), Porto-Novo sees average daytime highs around 29°C and overnight lows near 24°C, with 375 mm of rain over about 66 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 27°C in early September to 30°C by late November. The sky is clear or mostly clear about 14% of the time across fall, and the air most often feels oppressive.
Fall is Porto-Novo's 3rd-best season to visit on our travel score. Porto-Novo has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Porto-Novo's year-round climate.
- Avg daytime high
- 29°C
- 3rd-warmest season
- Avg overnight low
- 24°C
- Rainfall
- 375 mm
- 66 wet days
- Avg wind
- 11 km/h
- Travel score
- 4.0
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Porto-Novo in Fall
Over the season highs climb from about 27°C in early September to 30°C by late November.
A typical fall day in Porto-Novo reaches about 29°C and drops to 24°C overnight. The warmest of the three months is November, the coolest September.
How fall really feels in Porto-Novo
Once humidity and wind are folded in, fall brings about 51 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Porto-Novo weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 30° / 25° | 29 | 8.4 | 11.7 | 5.5 |
| Feb | 30° / 26° | 40 | 11.1 | 11.8 | 4.6 |
| Mar | 31° / 26° | 73 | 17.5 | 12 | 3.9 |
| Apr | 30° / 26° | 98 | 19 | 12.1 | 3.7 |
| May | 30° / 25° | 171 | 24.9 | 12.3 | 3.3 |
| Jun | 28° / 25° | 229 | 26.2 | 12.4 | 3.5 |
| Jul | 27° / 24° | 140 | 21.4 | 12.3 | 4.5 |
| Aug | 27° / 24° | 98 | 16.3 | 12.2 | 5.3 |
| Sep | 28° / 24° | 144 | 22.3 | 12 | 4.3 |
| Oct | 29° / 24° | 155 | 25.4 | 11.9 | 3.6 |
| Nov | 30° / 25° | 75 | 18.7 | 11.7 | 4.1 |
| Dec | 30° / 25° | 37 | 10.5 | 11.6 | 5.3 |
Cloud cover in Fall
The sky is clear or mostly clear about 14% of the time across fall.
Chance of precipitation in Fall
Porto-Novo gets around 375 mm of rain over 66 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 11 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 06 min in early September to 11 h 42 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.5 kWh/m².
Hazard calendar for Porto-Novo
None of Porto-Novo's seasonal hazards peak in fall. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Porto-Novo sees seasonal dust haze (January–April), heaviest in February.
Is fall a good time to visit Porto-Novo?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Porto-Novo for sightseeing.
What to pack for Porto-Novo in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Porto-Novo sees daytime highs around 29°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 66 days see rain.
Sea temperature near Porto-Novo in Fall
The nearest coast averages about 27°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 14 km away) is warmest in May at about 29°C and coldest in August near 25°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 29 | 29 | 29 | 28 | 26 | 25 | 26 | 27 | 29 | 28 |
| Comfort | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 29 | Tropical |
| May | 29 | Tropical |
| Jun | 28 | Warm |
| Jul | 26 | Warm |
| Aug | 25 | Warm |
| Sep | 26 | Warm |
| Oct | 27 | Warm |
| Nov | 29 | Tropical |
| Dec | 28 | Tropical |
UV index in Porto-Novo in Fall
Clear-sky midday UV across fall averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Porto-Novo peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 8 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 12 | 13 | 11 | 11 | 11 | 10 | 12 | 12 | 9 | 8 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 13 | Extreme |
| May | 11 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Very high |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in Porto-Novo in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Porto-Novo is worst in January — around 102 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (August, 25 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 102 | 86 | 47 | 44 | 33 | 30 | 27 | 25 | 29 | 39 | 46 | 89 |
| Level | Unhealthy | Unhealthy | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Poor | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 102 | Unhealthy |
| Feb | 86 | Unhealthy |
| Mar | 47 | Poor |
| Apr | 44 | Poor |
| May | 33 | Moderate |
| Jun | 30 | Moderate |
| Jul | 27 | Moderate |
| Aug | 25 | Moderate |
| Sep | 29 | Moderate |
| Oct | 39 | Poor |
| Nov | 46 | Poor |
| Dec | 89 | Unhealthy |
Where is Porto-Novo?
Porto-Novo sits at 6.5°N, 2.6°E, 20 m above sea level, in Benin. The nearest listed city is Missérété, 7.0 km away.
Topography around Porto-Novo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Porto-Novo.
Within 3 km, the terrain around Porto-Novo has only modest variations in elevation — a maximum elevation change of 31 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 65 m; within 80 km, only modest variations in elevation — a maximum elevation change of 171 m.
The land around Porto-Novo is covered by artificial surfaces (73%) within 3 km, trees (36%) and wetland (21%) within 16 km, and trees (36%) and water (31%) within 80 km.
Benin travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 220 V · 50 Hz
- Prices
- ≈ 34% of US
- price level, 2025
- GDP per capita
- $1,658
- 2025
- Happiness
- 4.4 / 10
- World Happiness, 2025
- Safe drinking water
- 18%
- of population, 2024
- Homicide rate
- 1.1
- per 100k, 2017
- Road deaths
- 26.8
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Very low
- EF EPI 406
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Porto-Novo (6.4965°, 2.6036°, elevation 20 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.