Semi in Summer
In summer (June, July and August), Semi sees average daytime highs around 26°C and overnight lows near 25°C, with 465 mm of rain over about 58 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Over the season highs ease from about 28°C in early June to 25°C by late August. The sky is clear or mostly clear about 8% of the time across summer, and the air most often feels oppressive.
Summer is Semi's 3rd-best season to visit on our travel score. Semi 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 Semi's year-round climate.
- Avg daytime high
- 26°C
- coldest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 465 mm
- 58 wet days
- Avg wind
- 21 km/h
- Travel score
- 5.1
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Semi in Summer
Over the season highs ease from about 28°C in early June to 25°C by late August.
A typical summer day in Semi reaches about 26°C and drops to 25°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Semi
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Semi weather by month
How the three summer months (June, July and August) 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 | 28° / 26° | 21 | 6.6 | 11.7 | 7.1 |
| Feb | 28° / 27° | 27 | 7.8 | 11.8 | 6.4 |
| Mar | 29° / 27° | 48 | 12.5 | 12 | 5.3 |
| Apr | 29° / 27° | 73 | 15.7 | 12.1 | 4.8 |
| May | 28° / 27° | 164 | 23.4 | 12.3 | 4.0 |
| Jun | 27° / 26° | 259 | 26.1 | 12.4 | 3.9 |
| Jul | 26° / 25° | 132 | 18.9 | 12.3 | 5.2 |
| Aug | 25° / 24° | 73 | 13.3 | 12.2 | 6.1 |
| Sep | 26° / 25° | 105 | 18 | 12 | 5.2 |
| Oct | 27° / 26° | 110 | 20.2 | 11.9 | 5.0 |
| Nov | 28° / 27° | 49 | 13.8 | 11.7 | 5.7 |
| Dec | 28° / 27° | 27 | 7.6 | 11.6 | 6.9 |
Cloud cover in Summer
The sky is clear or mostly clear about 8% of the time across summer.
Chance of precipitation in Summer
Semi gets around 465 mm of rain over 58 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 21 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 18 min in early June to 12 h 06 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.4 kWh/m².
Hazard calendar for Semi
In summer, Semi overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Semi's rainy season runs May–July, when most of the year's rain falls.
Semi sees seasonal dust haze (January–April), heaviest in February.
Is summer a good time to visit Semi?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Semi for sightseeing.
What to pack for Semi in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Semi sees daytime highs around 26°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 58 days see rain.
Sea temperature near Semi in Summer
The nearest coast averages about 26°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore 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 Semi in Summer
Clear-sky midday UV across summer averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Semi 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 Semi in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Semi is worst in January — around 78 µg/m³ PM2.5 (unhealthy), about 7.7× the cleanest month (September, 10 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) | 78 | 61 | 28 | 24 | 15 | 15 | 16 | 13 | 10 | 12 | 19 | 61 |
| Level | Unhealthy | Unhealthy | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Moderate | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 78 | Unhealthy |
| Feb | 61 | Unhealthy |
| Mar | 28 | Moderate |
| Apr | 24 | Moderate |
| May | 15 | Moderate |
| Jun | 15 | Moderate |
| Jul | 16 | Moderate |
| Aug | 13 | Moderate |
| Sep | 10 | Good |
| Oct | 12 | Good |
| Nov | 19 | Moderate |
| Dec | 61 | Unhealthy |
Where is Semi?
Semi sits at 6.4°N, 2.6°E, 8 m above sea level, in Benin. The nearest listed city is Ekpé, 9.0 km away.
Topography around Semi
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Semi.
Within 3 km, the terrain around Semi has only modest variations in elevation — a maximum elevation change of 13 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 30 m; within 80 km, only modest variations in elevation — a maximum elevation change of 171 m.
The land around Semi is covered by water (45%) and grassland (22%) within 3 km, water (58%) within 16 km, and water (37%) and trees (34%) 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 Semi (6.3667°, 2.6167°, elevation 8 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.