Mersa in Fall
In fall (September, October and November), Mersa sees average daytime highs around 27°C and overnight lows near 15°C, with 47 mm of rain over about 9 wet days across the season. It is the 3rd-warmest season and the driest season of the year.
Over the season highs ease from about 29°C in early September to 25°C by late November. The sky is clear or mostly clear about 69% of the time across fall, and the air most often feels dry.
Fall is Mersa's best season of the year to visit on our travel score. For the whole year in context, see Mersa's year-round climate.
- Avg daytime high
- 27°C
- 3rd-warmest season
- Avg overnight low
- 15°C
- Rainfall
- 47 mm
- 9 wet days
- Avg wind
- 6 km/h
- Travel score
- 7.7
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in Mersa in Fall
Over the season highs ease from about 29°C in early September to 25°C by late November.
A typical fall day in Mersa reaches about 27°C and drops to 15°C overnight. The warmest of the three months is September, the coolest November.
Mersa 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 | 24° / 13° | 69 | 9.2 | 11.4 | 7.4 |
| Feb | 25° / 14° | 56 | 8 | 11.6 | 7.2 |
| Mar | 27° / 15° | 134 | 13.8 | 11.9 | 6.3 |
| Apr | 28° / 16° | 98 | 11.7 | 12.3 | 6.3 |
| May | 30° / 17° | 23 | 4.1 | 12.5 | 6.1 |
| Jun | 31° / 18° | 3 | 0.4 | 12.7 | 5.5 |
| Jul | 30° / 18° | 39 | 7.7 | 12.6 | 5.3 |
| Aug | 29° / 17° | 59 | 10.6 | 12.4 | 5.6 |
| Sep | 29° / 17° | 10 | 2.8 | 12.1 | 6.8 |
| Oct | 27° / 16° | 13 | 2.9 | 11.7 | 8.0 |
| Nov | 26° / 13° | 24 | 3.4 | 11.5 | 8.4 |
| Dec | 25° / 12° | 38 | 4.7 | 11.3 | 8.3 |
Cloud cover in Fall
The sky is clear or mostly clear about 69% of the time across fall.
Chance of precipitation in Fall
Mersa gets around 47 mm of rain over 9 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 6 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 12 min in early September to 11 h 24 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 6.0 kWh/m².
Hazard calendar for Mersa
None of Mersa's seasonal hazards peak in fall. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Mersa's rainy season runs March–April, when most of the year's rain falls.
Mersa sees seasonal dust haze (June–August), heaviest in July.
Is fall a good time to visit Mersa?
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 one of the better times to visit Mersa for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Mersa in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Mersa sees daytime highs around 27°C and nights near 15°C. Pack light clothes and sun protection. About 9 days see rain.
UV index in Mersa in Fall
Clear-sky midday UV across fall averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mersa peaks around March 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 10 (extreme).
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 | 13 | 15 | 14 | 13 | 13 | 11 | 13 | 13 | 13 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 13 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 13 | Extreme |
| Jul | 11 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Extreme |
Air quality in Mersa 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 Mersa is worst in June — around 38 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 29 | 30 | 32 | 28 | 33 | 38 | 34 | 37 | 38 | 29 | 26 | 28 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Moderate | Poor | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 29 | Moderate |
| Feb | 30 | Moderate |
| Mar | 32 | Moderate |
| Apr | 28 | Moderate |
| May | 33 | Moderate |
| Jun | 38 | Poor |
| Jul | 34 | Moderate |
| Aug | 37 | Poor |
| Sep | 38 | Poor |
| Oct | 29 | Moderate |
| Nov | 26 | Moderate |
| Dec | 28 | Moderate |
Where is Mersa?
Mersa sits at 11.7°N, 39.6°E, 1,721 m above sea level, in Ethiopia. The nearest listed city is Weldiya, 19 km away.
Topography around Mersa
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mersa.
Within 3 km, the terrain around Mersa has significant variations in elevation — a maximum elevation change of 451 m around an average of 1,673 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,229 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,515 m.
The land around Mersa is covered by cropland (48%) and shrubs (33%) within 3 km, shrubs (41%) and cropland (37%) within 16 km, and shrubs (36%), cropland (29%) and grassland (28%) within 80 km.
Ethiopia travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type C / E / F / L
- 220 V · 50 Hz
- Prices
- ≈ 37% of US
- price level, 2025
- GDP per capita
- $933
- 2025
- Happiness
- 4.0 / 10
- World Happiness, 2025
- Safe drinking water
- 14%
- of population, 2024
- Homicide rate
- 8.5
- per 100k, 2012
- Road deaths
- 28.2
- per 100k/yr, 2019
- Income group
- Low
- World Bank
- English
- Low
- EF EPI 499
- 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 Mersa (11.6667°, 39.65°, elevation 1,721 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.