Porto-Novo weather in May
In May, Porto-Novo sees average daytime highs of 30°C and overnight lows near 25°C, with 171 mm of rain across 24.9 wet days and about 12.3 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.
Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 6% of the time in May, and the air most often feels miserable.
Daylight stretches from about 12 h 12 min at the start of May to 12 h 18 min by month's end. Set against the rest of the year, May is Porto-Novo's 8th-clearest and 9th-windiest month. For the whole year in context, see Porto-Novo's year-round climate.
- Daytime high
- 30°
- 6th warmest
- Overnight low
- 25°
- 9th coldest
- Rainfall
- 171 mm
- 24.9 wet days
- Daylight
- 12 h 18 min
- 6:37 AM – 6:55 PM
- Cloud cover
- 79%
- 8th clearest
- Wind
- 11 km/h
- 9th windiest
- Solar energy
- 4.71 kWh/m²
- Travel score
- 3.3
- out of 10
Porto-Novo is capital of Benin.
- Density
- 5,083/km²
- people per km²
- Founded
- 1550
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Day-to-day highs hold fairly steady near 30°C through the month.
A typical May day in Porto-Novo reaches about 30°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, May runs on par with April and about 1°C warmer than June.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 26 |
| 2 | 30 | 26 |
| 3 | 30 | 26 |
| 4 | 30 | 26 |
| 5 | 30 | 26 |
| 6 | 30 | 26 |
| 7 | 30 | 26 |
| 8 | 30 | 26 |
| 9 | 30 | 26 |
| 10 | 30 | 26 |
| 11 | 30 | 26 |
| 12 | 30 | 26 |
| 13 | 30 | 26 |
| 14 | 30 | 26 |
| 15 | 30 | 26 |
| 16 | 30 | 26 |
| 17 | 30 | 25 |
| 18 | 30 | 25 |
| 19 | 30 | 25 |
| 20 | 30 | 25 |
| 21 | 30 | 25 |
| 22 | 29 | 25 |
| 23 | 29 | 25 |
| 24 | 29 | 25 |
| 25 | 29 | 25 |
| 26 | 29 | 25 |
| 27 | 29 | 25 |
| 28 | 29 | 25 |
| 29 | 29 | 25 |
| 30 | 29 | 25 |
| 31 | 29 | 25 |
How May really feels in Porto-Novo
Once humidity and wind are folded in, May averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Porto-Novo weather by month
How May compares with the rest of the year at a glance. May is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.
| 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 May
The sky is clear or mostly clear about 6% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 79%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 25 | 24 | 23 | 23 | 23 | 23 | 22 | 21 | 20 | 20 | 18 | 18 | 16 | 16 | 14 | 14 | 14 | 13 | 12 |
| Cloudier (%) | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | 76 | 75 | 76 | 77 | 77 | 77 | 77 | 78 | 79 | 80 | 80 | 82 | 82 | 84 | 84 | 86 | 86 | 86 | 87 | 88 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 23 | 77 |
| 2 | 23 | 77 |
| 3 | 23 | 77 |
| 4 | 23 | 77 |
| 5 | 23 | 77 |
| 6 | 23 | 77 |
| 7 | 23 | 77 |
| 8 | 23 | 77 |
| 9 | 23 | 77 |
| 10 | 23 | 77 |
| 11 | 24 | 76 |
| 12 | 24 | 76 |
| 13 | 25 | 75 |
| 14 | 24 | 76 |
| 15 | 23 | 77 |
| 16 | 23 | 77 |
| 17 | 23 | 77 |
| 18 | 23 | 77 |
| 19 | 22 | 78 |
| 20 | 21 | 79 |
| 21 | 20 | 80 |
| 22 | 20 | 80 |
| 23 | 18 | 82 |
| 24 | 18 | 82 |
| 25 | 16 | 84 |
| 26 | 16 | 84 |
| 27 | 14 | 86 |
| 28 | 14 | 86 |
| 29 | 14 | 86 |
| 30 | 13 | 87 |
| 31 | 12 | 88 |
Chance of precipitation in May
Porto-Novo gets around 171 mm of rain over 24.9 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 80% and peaks near 87% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 73 | 73 | 74 | 74 | 75 | 75 | 75 | 76 | 76 | 76 | 77 | 77 | 78 | 78 | 79 | 80 | 80 | 81 | 82 | 83 | 83 | 84 | 85 | 85 | 85 | 86 | 86 | 87 | 87 | 87 | 87 |
| Rain chance (%) | |
|---|---|
| 1 | 73 |
| 2 | 73 |
| 3 | 74 |
| 4 | 74 |
| 5 | 75 |
| 6 | 75 |
| 7 | 75 |
| 8 | 76 |
| 9 | 76 |
| 10 | 76 |
| 11 | 77 |
| 12 | 77 |
| 13 | 78 |
| 14 | 78 |
| 15 | 79 |
| 16 | 80 |
| 17 | 80 |
| 18 | 81 |
| 19 | 82 |
| 20 | 83 |
| 21 | 83 |
| 22 | 84 |
| 23 | 85 |
| 24 | 85 |
| 25 | 85 |
| 26 | 86 |
| 27 | 86 |
| 28 | 87 |
| 29 | 87 |
| 30 | 87 |
| 31 | 87 |
Humidity in May
Most of May feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the miserable band about 82% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oppressive (%) | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 10 | 11 | 12 | 12 | 13 | 14 | 15 | 17 | 18 | 19 | 21 | 23 | 25 | 27 | 29 | 31 | 33 | 35 | 37 | 39 | 41 |
| Miserable (%) | 95 | 95 | 94 | 94 | 93 | 93 | 92 | 92 | 91 | 90 | 90 | 89 | 88 | 88 | 87 | 86 | 85 | 83 | 82 | 81 | 79 | 77 | 75 | 73 | 71 | 69 | 67 | 65 | 63 | 61 | 59 |
| Oppressive (%) | Miserable (%) | |
|---|---|---|
| 1 | 5 | 95 |
| 2 | 5 | 95 |
| 3 | 6 | 94 |
| 4 | 6 | 94 |
| 5 | 7 | 93 |
| 6 | 7 | 93 |
| 7 | 8 | 92 |
| 8 | 8 | 92 |
| 9 | 9 | 91 |
| 10 | 10 | 90 |
| 11 | 10 | 90 |
| 12 | 11 | 89 |
| 13 | 12 | 88 |
| 14 | 12 | 88 |
| 15 | 13 | 87 |
| 16 | 14 | 86 |
| 17 | 15 | 85 |
| 18 | 17 | 83 |
| 19 | 18 | 82 |
| 20 | 19 | 81 |
| 21 | 21 | 79 |
| 22 | 23 | 77 |
| 23 | 25 | 75 |
| 24 | 27 | 73 |
| 25 | 29 | 71 |
| 26 | 31 | 69 |
| 27 | 33 | 67 |
| 28 | 35 | 65 |
| 29 | 37 | 63 |
| 30 | 39 | 61 |
| 31 | 41 | 59 |
Wind in May
Winds average 11 km/h in May.
Across May, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 11 | calm |
| 5 | 11 | calm |
| 6 | 11 | calm |
| 7 | 11 | calm |
| 8 | 11 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | calm |
| 20 | 11 | calm |
| 21 | 11 | calm |
| 22 | 11 | calm |
| 23 | 11 | calm |
| 24 | 11 | calm |
| 25 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 10 | calm |
| 29 | 10 | calm |
| 30 | 10 | calm |
| 31 | 10 | calm |
Sunrise & sunset in May
Daylight runs from about 12 h 12 min at the start of May to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over May. Sunrise moves from 6:40 AM to 6:37 AM, and sunset from 6:54 PM to 6:57 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 |
| Sunrise (AM) | 6:40 | 6:40 | 6:39 | 6:39 | 6:39 | 6:39 | 6:38 | 6:38 | 6:38 | 6:38 | 6:38 | 6:38 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:36 | 6:36 | 6:36 | 6:36 | 6:36 | 6:36 | 6:36 | 6:37 | 6:37 |
| Sunset (PM) | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:54 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:56 | 6:56 | 6:56 | 6:56 | 6:56 | 6:57 | 6:57 | 6:57 | 6:57 | 6:57 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.2 | 6:40 | 6:54 |
| 2 | 12.2 | 6:40 | 6:54 |
| 3 | 12.2 | 6:39 | 6:54 |
| 4 | 12.2 | 6:39 | 6:54 |
| 5 | 12.2 | 6:39 | 6:54 |
| 6 | 12.3 | 6:39 | 6:54 |
| 7 | 12.3 | 6:38 | 6:54 |
| 8 | 12.3 | 6:38 | 6:54 |
| 9 | 12.3 | 6:38 | 6:54 |
| 10 | 12.3 | 6:38 | 6:54 |
| 11 | 12.3 | 6:38 | 6:54 |
| 12 | 12.3 | 6:38 | 6:54 |
| 13 | 12.3 | 6:37 | 6:54 |
| 14 | 12.3 | 6:37 | 6:54 |
| 15 | 12.3 | 6:37 | 6:55 |
| 16 | 12.3 | 6:37 | 6:55 |
| 17 | 12.3 | 6:37 | 6:55 |
| 18 | 12.3 | 6:37 | 6:55 |
| 19 | 12.3 | 6:37 | 6:55 |
| 20 | 12.3 | 6:37 | 6:55 |
| 21 | 12.3 | 6:37 | 6:55 |
| 22 | 12.3 | 6:37 | 6:56 |
| 23 | 12.3 | 6:36 | 6:56 |
| 24 | 12.3 | 6:36 | 6:56 |
| 25 | 12.3 | 6:36 | 6:56 |
| 26 | 12.3 | 6:36 | 6:56 |
| 27 | 12.3 | 6:36 | 6:57 |
| 28 | 12.3 | 6:36 | 6:57 |
| 29 | 12.3 | 6:36 | 6:57 |
| 30 | 12.3 | 6:37 | 6:57 |
| 31 | 12.3 | 6:37 | 6:57 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 4.71 kWh/m².
For context, solar energy here swings from a low near 4.04 kWh/m² to a high of 5.41 kWh/m² in February across the year — May's 4.71 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.7 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.4 | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.0 | Bright |
| 2 | 5.0 | Bright |
| 3 | 5.0 | Bright |
| 4 | 5.0 | Bright |
| 5 | 5.0 | Bright |
| 6 | 4.9 | Bright |
| 7 | 4.9 | Bright |
| 8 | 4.9 | Bright |
| 9 | 4.9 | Bright |
| 10 | 4.9 | Bright |
| 11 | 4.8 | Bright |
| 12 | 4.8 | Bright |
| 13 | 4.8 | Bright |
| 14 | 4.8 | Bright |
| 15 | 4.8 | Bright |
| 16 | 4.8 | Bright |
| 17 | 4.7 | Bright |
| 18 | 4.7 | Bright |
| 19 | 4.7 | Bright |
| 20 | 4.7 | Bright |
| 21 | 4.6 | Bright |
| 22 | 4.6 | Bright |
| 23 | 4.5 | Bright |
| 24 | 4.5 | Bright |
| 25 | 4.5 | Bright |
| 26 | 4.4 | Bright |
| 27 | 4.4 | Bright |
| 28 | 4.4 | Bright |
| 29 | 4.3 | Bright |
| 30 | 4.3 | Bright |
| 31 | 4.3 | Bright |
Hazard calendar for Porto-Novo
None of Porto-Novo's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Porto-Novo sees seasonal dust haze (January–April), heaviest in February.
Is May a good time to visit Porto-Novo?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a weaker month for outdoor sightseeing in Porto-Novo.
What to pack for Porto-Novo in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Porto-Novo sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.
Sea temperature near Porto-Novo in May
The nearest coast averages about 29°C in May — 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 May
Clear-sky midday UV in May peaks 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 May
Average fine-particle pollution (PM2.5) through the year — so you can see where May 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).