Harper in Fall
In fall (September, October and November), Harper sees average daytime highs around 27°C and overnight lows near 24°C, with 575 mm of rain over about 83 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Across fall, daytime highs hold fairly steady around 27°C. The sky is clear or mostly clear about 3% of the time across fall, and the air most often feels oppressive.
Fall is Harper's 3rd-best season to visit on our travel score. Harper 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 Harper's year-round climate.
- Avg daytime high
- 27°C
- 3rd-warmest season
- Avg overnight low
- 24°C
- Rainfall
- 575 mm
- 83 wet days
- Avg wind
- 10 km/h
- Travel score
- 3.6
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Harper in Fall
Across fall, daytime highs hold fairly steady around 27°C.
A typical fall day in Harper reaches about 27°C and drops to 24°C overnight. The warmest of the three months is November, the coolest September.
How fall really feels in Harper
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
fall sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Harper 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 | 29° / 24° | 95 | 19.6 | 11.8 | 4.5 |
| Feb | 29° / 25° | 108 | 20.8 | 11.9 | 3.9 |
| Mar | 29° / 25° | 148 | 26 | 12 | 3.4 |
| Apr | 29° / 25° | 156 | 26.2 | 12.1 | 3.3 |
| May | 28° / 25° | 291 | 29.3 | 12.2 | 3.2 |
| Jun | 27° / 24° | 282 | 25.7 | 12.2 | 3.9 |
| Jul | 26° / 24° | 134 | 19.8 | 12.2 | 4.8 |
| Aug | 26° / 23° | 123 | 20.6 | 12.1 | 4.7 |
| Sep | 27° / 24° | 240 | 27.3 | 12 | 3.7 |
| Oct | 27° / 24° | 197 | 29.2 | 11.9 | 3.6 |
| Nov | 28° / 24° | 138 | 26.3 | 11.8 | 3.6 |
| Dec | 28° / 24° | 116 | 24.4 | 11.8 | 4.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 3% of the time across fall.
Chance of precipitation in Fall
Harper gets around 575 mm of rain over 83 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 10 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 06 min in early September to 11 h 48 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 Harper
None of Harper's seasonal hazards peak in fall. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Harper sees seasonal dust haze (February), heaviest in February.
Is fall a good time to visit Harper?
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 weaker month for outdoor sightseeing in Harper.
What to pack for Harper in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Harper sees daytime highs around 27°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 83 days see rain.
Sea temperature near Harper 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 offshore is warmest in May at about 29°C and coldest in August near 26°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 | 28 | 29 | 29 | 28 | 27 | 26 | 26 | 27 | 28 | 28 |
| Comfort | Tropical | Warm | Tropical | Tropical | Tropical | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 28 | Warm |
| Mar | 28 | Tropical |
| Apr | 29 | Tropical |
| May | 29 | Tropical |
| Jun | 28 | Warm |
| Jul | 27 | Warm |
| Aug | 26 | Warm |
| Sep | 26 | Warm |
| Oct | 27 | Warm |
| Nov | 28 | Tropical |
| Dec | 28 | Tropical |
UV index in Harper 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 Harper peaks around April 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 15 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) | 11 | 13 | 13 | 14 | 12 | 10 | 9 | 11 | 12 | 12 | 10 | 9 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 13 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Very high |
| Jul | 9 | Very high |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Extreme |
| Dec | 9 | Very high |
Air quality in Harper 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 Harper is worst in January — around 41 µg/m³ PM2.5 (poor), about 6.0× the cleanest month (September, 7 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) | 41 | 37 | 26 | 31 | 13 | 13 | 13 | 9 | 7 | 8 | 12 | 29 |
| Level | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 41 | Poor |
| Feb | 37 | Poor |
| Mar | 26 | Moderate |
| Apr | 31 | Moderate |
| May | 13 | Moderate |
| Jun | 13 | Moderate |
| Jul | 13 | Moderate |
| Aug | 9 | Good |
| Sep | 7 | Good |
| Oct | 8 | Good |
| Nov | 12 | Good |
| Dec | 29 | Moderate |
Where is Harper?
Harper sits at 4.4°N, 7.7°W, 14 m above sea level, in Liberia. The nearest listed city is Pleebo City, 24 km away.
Topography around Harper
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Harper.
Within 3 km, the terrain around Harper has only modest variations in elevation — a maximum elevation change of 39 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 80 m; within 80 km, significant variations in elevation — a maximum elevation change of 405 m.
The land around Harper is covered by water (46%) and grassland (22%) within 3 km, water (53%) and trees (30%) within 16 km, and trees (56%) and water (41%) within 80 km.
Liberia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 0% of US
- price level, 2025
- GDP per capita
- $915
- 2025
- Happiness
- 4.3 / 10
- World Happiness, 2025
- Homicide rate
- 3.1
- per 100k, 2012
- Road deaths
- 38.9
- per 100k/yr, 2019
- Income group
- Low
- 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 Harper (4.3782°, -7.7108°, elevation 14 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.