Waterloo in Spring
In spring (March, April and May), Waterloo sees average daytime highs around 30°C and overnight lows near 25°C, with 283 mm of rain over about 38 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Across spring, daytime highs hold fairly steady around 30°C. The sky is clear or mostly clear about 23% of the time across spring, and the air most often feels oppressive.
Spring is Waterloo's 2nd-best season to visit on our travel score. Waterloo 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 Waterloo's year-round climate.
- Avg daytime high
- 30°C
- warmest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 283 mm
- 38 wet days
- Avg wind
- 9 km/h
- Travel score
- 4.7
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Waterloo in Spring
Across spring, daytime highs hold fairly steady around 30°C.
A typical spring day in Waterloo reaches about 30°C and drops to 25°C overnight. The warmest of the three months is March, the coolest March.
How spring really feels in Waterloo
Once humidity and wind are folded in, spring brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in spring is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Waterloo weather by month
How the three spring months (March, April and May) 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 | 30° / 24° | 16 | 4.1 | 11.6 | 6.2 |
| Feb | 30° / 25° | 11 | 2.2 | 11.7 | 6.0 |
| Mar | 30° / 25° | 20 | 4.7 | 11.9 | 5.6 |
| Apr | 30° / 25° | 47 | 8.4 | 12.2 | 5.0 |
| May | 29° / 25° | 216 | 25.2 | 12.4 | 3.5 |
| Jun | 28° / 24° | 426 | 29.7 | 12.5 | 3.2 |
| Jul | 27° / 24° | 606 | 29.9 | 12.4 | 3.4 |
| Aug | 26° / 24° | 705 | 29.7 | 12.3 | 3.4 |
| Sep | 27° / 24° | 501 | 29.4 | 12 | 3.3 |
| Oct | 28° / 24° | 266 | 29.6 | 11.8 | 3.3 |
| Nov | 29° / 24° | 130 | 24.8 | 11.6 | 3.7 |
| Dec | 29° / 25° | 42 | 11.1 | 11.5 | 5.5 |
Cloud cover in Spring
The sky is clear or mostly clear about 23% of the time across spring.
Chance of precipitation in Spring
Waterloo gets around 283 mm of rain over 38 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 9 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 48 min in early March to 12 h 24 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.5 kWh/m².
Hazard calendar for Waterloo
In spring, Waterloo overlaps its dust season. The full year is below, with each hazard's peak months called out.
Waterloo's monsoon runs June–September, when most of the year's rain falls.
Waterloo sees seasonal dust haze (February–April), heaviest in February.
Is spring a good time to visit Waterloo?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Waterloo for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Waterloo in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Waterloo sees daytime highs around 30°C and nights near 25°C. Pack light clothes, rain gear and sun protection. About 38 days see rain.
Sea temperature near Waterloo in Spring
The nearest coast averages about 28°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 25 km away) is warmest in May at about 29°C and coldest in August near 27°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 | 28 | 29 | 28 | 27 | 27 | 27 | 28 | 29 | 29 |
| Comfort | Warm | Warm | Warm | Warm | Tropical | Tropical | Warm | Warm | Warm | Warm | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Warm |
| Mar | 28 | Warm |
| Apr | 28 | Warm |
| May | 29 | Tropical |
| Jun | 28 | Tropical |
| Jul | 27 | Warm |
| Aug | 27 | Warm |
| Sep | 27 | Warm |
| Oct | 28 | Warm |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Waterloo in Spring
Clear-sky midday UV across spring 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 Waterloo 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 | 11 | 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 | 11 | 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 Waterloo in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Waterloo is worst in April — around 217 µg/m³ PM2.5 (very unhealthy), about 19.6× the cleanest month (August, 11 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) | 72 | 78 | 106 | 217 | 43 | 20 | 14 | 11 | 12 | 18 | 27 | 54 |
| Level | Unhealthy | Unhealthy | Unhealthy | Very unhealthy | Poor | Moderate | Moderate | Good | Moderate | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 72 | Unhealthy |
| Feb | 78 | Unhealthy |
| Mar | 106 | Unhealthy |
| Apr | 217 | Very unhealthy |
| May | 43 | Poor |
| Jun | 20 | Moderate |
| Jul | 14 | Moderate |
| Aug | 11 | Good |
| Sep | 12 | Moderate |
| Oct | 18 | Moderate |
| Nov | 27 | Moderate |
| Dec | 54 | Poor |
Where is Waterloo?
Waterloo sits at 8.3°N, 13.1°W, 23 m above sea level, in Sierra Leone. The nearest listed city is Freetown, 24 km away.
Topography around Waterloo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Waterloo.
Within 3 km, the terrain around Waterloo has significant variations in elevation — a maximum elevation change of 419 m around an average of 52 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 899 m; within 80 km, large variations in elevation — a maximum elevation change of 885 m.
The land around Waterloo is covered by artificial surfaces (46%), grassland (23%) and trees (20%) within 3 km, trees (48%) within 16 km, and water (41%) and trees (39%) 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 Waterloo (8.3389°, -13.0709°, elevation 23 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.