Oyam in Summer
In summer (December, January and February), Oyam sees average daytime highs around 31°C and overnight lows near 23°C, with 545 mm of rain over about 79 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Across summer, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 1% of the time across summer, and the air most often feels oppressive.
Summer is Oyam's 3rd-best season to visit on our travel score. Oyam 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 Oyam's year-round climate.
- Avg daytime high
- 31°C
- 2nd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 545 mm
- 79 wet days
- Avg wind
- 5 km/h
- Travel score
- 2.7
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Oyam in Summer
Across summer, daytime highs hold fairly steady around 31°C.
A typical summer day in Oyam reaches about 31°C and drops to 23°C overnight. The warmest of the three months is February, the coolest December.
How summer really feels in Oyam
Once humidity and wind are folded in, summer brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Oyam weather by month
How the three summer months (December, January and February) 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 | 31° / 23° | 165 | 26.2 | 12 | 2.8 |
| Feb | 31° / 23° | 157 | 23.9 | 12 | 2.6 |
| Mar | 31° / 23° | 222 | 27.5 | 12 | 2.5 |
| Apr | 31° / 23° | 220 | 26.5 | 12 | 2.6 |
| May | 31° / 23° | 193 | 27 | 12 | 2.8 |
| Jun | 29° / 22° | 59 | 11.8 | 12 | 5.2 |
| Jul | 27° / 21° | 22 | 5.8 | 12 | 6.5 |
| Aug | 28° / 22° | 26 | 6.9 | 12 | 6.2 |
| Sep | 29° / 22° | 104 | 19.9 | 12 | 3.9 |
| Oct | 30° / 23° | 255 | 29.3 | 12 | 2.7 |
| Nov | 30° / 23° | 293 | 29.3 | 12 | 2.6 |
| Dec | 30° / 23° | 223 | 28.4 | 12 | 2.7 |
Cloud cover in Summer
The sky is clear or mostly clear about 1% of the time across summer.
Chance of precipitation in Summer
Oyam gets around 545 mm of rain over 79 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 5 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 hours in early December to 12 hours by late February. 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 4.5 kWh/m².
Is summer a good time to visit Oyam?
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 weaker month for outdoor sightseeing in Oyam.
What to pack for Oyam in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Oyam sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 79 days see rain.
UV index in Oyam in Summer
Clear-sky midday UV across summer 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 Oyam peaks around March 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 9 (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) | 12 | 12 | 14 | 13 | 11 | 9 | 9 | 10 | 12 | 13 | 12 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 12 | Extreme |
| Mar | 14 | Extreme |
| Apr | 13 | Extreme |
| May | 11 | Extreme |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 10 | Very high |
| Sep | 12 | Extreme |
| Oct | 13 | Extreme |
| Nov | 12 | Extreme |
| Dec | 10 | Very high |
Air quality in Oyam 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 Oyam is worst in February — around 41 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (October, 18 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) | 35 | 41 | 31 | 26 | 26 | 32 | 31 | 26 | 20 | 18 | 22 | 30 |
| Level | Moderate | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 35 | Moderate |
| Feb | 41 | Poor |
| Mar | 31 | Moderate |
| Apr | 26 | Moderate |
| May | 26 | Moderate |
| Jun | 32 | Moderate |
| Jul | 31 | Moderate |
| Aug | 26 | Moderate |
| Sep | 20 | Moderate |
| Oct | 18 | Moderate |
| Nov | 22 | Moderate |
| Dec | 30 | Moderate |
Where is Oyam?
Oyam sits at 0.2°S, 10.7°E, 72 m above sea level, in Gabon. The nearest listed city is Lambaréné, 74 km away.
Topography around Oyam
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Oyam.
Within 3 km, the terrain around Oyam has significant variations in elevation — a maximum elevation change of 283 m around an average of 116 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 442 m; within 80 km, large variations in elevation — a maximum elevation change of 1,018 m.
The land around Oyam is covered by trees (97%) within 3 km, trees (97%) within 16 km, and trees (99%) within 80 km.
Gabon travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 220 V · 50 Hz
- Prices
- ≈ 37% of US
- price level, 2025
- GDP per capita
- $8,263
- 2025
- Happiness
- 5.2 / 10
- World Happiness, 2025
- Road deaths
- 23.9
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- 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 Oyam (-0.2°, 10.6833°, elevation 72 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.