Mile 91 in Winter
In winter (December, January and February), Mile 91 sees average daytime highs around 33°C and overnight lows near 22°C, with 40 mm of rain over about 10 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 31°C in early December to 35°C by late February. The sky is clear or mostly clear about 55% of the time across winter, and the air most often feels oppressive.
Winter is Mile 91's best season of the year to visit on our travel score. For the whole year in context, see Mile 91's year-round climate.
- Avg daytime high
- 33°C
- warmest season of the year
- Avg overnight low
- 22°C
- Rainfall
- 40 mm
- 10 wet days
- Avg wind
- 5 km/h
- Travel score
- 3.9
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Mile 91 in Winter
Over the season highs climb from about 31°C in early December to 35°C by late February.
A typical winter day in Mile 91 reaches about 33°C and drops to 22°C overnight. The warmest of the three months is February, the coolest December.
How winter really feels in Mile 91
Once humidity and wind are folded in, winter brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Mile 91 weather by month
How the three winter 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 | 33° / 22° | 10 | 2.8 | 11.6 | 4.0 |
| Feb | 35° / 23° | 11 | 2.3 | 11.7 | 3.0 |
| Mar | 35° / 24° | 33 | 7.6 | 11.9 | 2.6 |
| Apr | 34° / 24° | 76 | 13.5 | 12.2 | 2.8 |
| May | 31° / 24° | 212 | 25.5 | 12.4 | 2.7 |
| Jun | 29° / 23° | 321 | 28.5 | 12.5 | 2.8 |
| Jul | 28° / 23° | 432 | 29.8 | 12.4 | 3.1 |
| Aug | 28° / 22° | 507 | 29.7 | 12.3 | 3.3 |
| Sep | 29° / 23° | 403 | 29.2 | 12 | 2.9 |
| Oct | 30° / 23° | 226 | 28.8 | 11.8 | 2.9 |
| Nov | 30° / 22° | 87 | 18.3 | 11.6 | 3.8 |
| Dec | 32° / 22° | 19 | 5 | 11.5 | 4.8 |
Cloud cover in Winter
The sky is clear or mostly clear about 55% of the time across winter.
Chance of precipitation in Winter
Mile 91 gets around 40 mm of rain over 10 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 5 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 30 min in early December to 11 h 48 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 5.4 kWh/m².
Hazard calendar for Mile 91
In winter, Mile 91 overlaps its dust season. The full year is below, with each hazard's peak months called out.
Mile 91's monsoon runs June–September, when most of the year's rain falls.
Mile 91 sees seasonal dust haze (February–April), heaviest in February.
Is winter a good time to visit Mile 91?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Mile 91. The water and warmth also suit a beach or pool day.
What to pack for Mile 91 in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Mile 91 sees daytime highs around 33°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 10 days see rain.
UV index in Mile 91 in Winter
Clear-sky midday UV across winter 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 Mile 91 peaks around August 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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) | 9 | 12 | 12 | 10 | 12 | 12 | 11 | 13 | 12 | 11 | 9 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 12 | Extreme |
| Mar | 12 | Extreme |
| Apr | 10 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in Mile 91 in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Mile 91 is worst in April — around 202 µg/m³ PM2.5 (very unhealthy), about 19.4× the cleanest month (August, 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) | 70 | 77 | 194 | 202 | 33 | 19 | 13 | 10 | 11 | 17 | 25 | 50 |
| Level | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy | Moderate | Moderate | Moderate | Good | Good | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 70 | Unhealthy |
| Feb | 77 | Unhealthy |
| Mar | 194 | Very unhealthy |
| Apr | 202 | Very unhealthy |
| May | 33 | Moderate |
| Jun | 19 | Moderate |
| Jul | 13 | Moderate |
| Aug | 10 | Good |
| Sep | 11 | Good |
| Oct | 17 | Moderate |
| Nov | 25 | Moderate |
| Dec | 50 | Poor |
Where is Mile 91?
Mile 91 sits at 8.5°N, 12.2°W, 77 m above sea level, in Sierra Leone. The nearest listed city is Njala, 34 km away.
Topography around Mile 91
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mile 91.
Within 3 km, the terrain around Mile 91 has only modest variations in elevation — a maximum elevation change of 31 m around an average of 73 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 438 m; within 80 km, large variations in elevation — a maximum elevation change of 820 m.
The land around Mile 91 is covered by grassland (62%) within 3 km, grassland (58%) and trees (26%) within 16 km, and trees (57%) and grassland (24%) within 80 km.
Sierra Leone travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type D / G
- 230 V · 50 Hz
- Prices
- ≈ 24% of US
- price level, 2025
- GDP per capita
- $846
- 2025
- Happiness
- 3.3 / 10
- World Happiness, 2025
- Safe drinking water
- 11%
- of population, 2024
- Homicide rate
- 2.2
- per 100k, 2020
- Road deaths
- 33
- 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 Mile 91 (8.466°, -12.2146°, elevation 77 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.