Waterloo weather in January
In January, Waterloo sees average daytime highs of 30°C and overnight lows near 24°C, with 16 mm of rain across 4.1 wet days and about 11.6 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 60% of the time in January, and the air most often feels oppressive.
Daylight stretches from about 11 h 30 min at the start of January to 11 h 36 min by month's end. Set against the rest of the year, January is Waterloo's 1st-clearest and 7th-windiest month. For the whole year in context, see Waterloo's year-round climate.
- Daytime high
- 30°
- 4th warmest
- Overnight low
- 24°
- 7th coldest
- Rainfall
- 16 mm
- 4.1 wet days
- Daylight
- 11 h 36 min
- 7:15 AM – 6:48 PM
- Cloud cover
- 38%
- 1st clearest
- Wind
- 9 km/h
- 7th windiest
- Solar energy
- 5.42 kWh/m²
- Travel score
- 6.2
- out of 10
Waterloo is city in Sierra Leone.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in January
Day-to-day highs hold fairly steady near 30°C through the month.
A typical January day in Waterloo reaches about 30°C in the afternoon and slips back to 24°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, January runs on par with December and on par with February.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 29 | 24 |
| 2 | 29 | 24 |
| 3 | 29 | 24 |
| 4 | 29 | 24 |
| 5 | 30 | 24 |
| 6 | 30 | 24 |
| 7 | 30 | 24 |
| 8 | 30 | 24 |
| 9 | 30 | 24 |
| 10 | 30 | 24 |
| 11 | 30 | 24 |
| 12 | 30 | 24 |
| 13 | 30 | 24 |
| 14 | 30 | 24 |
| 15 | 30 | 24 |
| 16 | 30 | 24 |
| 17 | 30 | 24 |
| 18 | 30 | 24 |
| 19 | 30 | 24 |
| 20 | 30 | 24 |
| 21 | 30 | 24 |
| 22 | 30 | 24 |
| 23 | 30 | 24 |
| 24 | 30 | 24 |
| 25 | 30 | 24 |
| 26 | 30 | 24 |
| 27 | 30 | 24 |
| 28 | 30 | 24 |
| 29 | 30 | 24 |
| 30 | 30 | 24 |
| 31 | 30 | 24 |
How January really feels in Waterloo
Once humidity and wind are folded in, January averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Waterloo weather by month
How January compares with the rest of the year at a glance. January is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.
| 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 January
The sky is clear or mostly clear about 60% of the time in January, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 25%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 74 | 74 | 74 | 74 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 72 | 72 | 72 | 72 | 72 | 73 | 74 | 75 | 75 | 76 | 76 | 77 | 78 | 79 | 79 | 80 | 80 | 80 | 80 | 80 |
| Cloudier (%) | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 26 | 25 | 25 | 24 | 24 | 23 | 22 | 21 | 21 | 20 | 20 | 20 | 20 | 20 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 74 | 26 |
| 2 | 74 | 26 |
| 3 | 74 | 26 |
| 4 | 74 | 26 |
| 5 | 73 | 27 |
| 6 | 73 | 27 |
| 7 | 73 | 27 |
| 8 | 73 | 27 |
| 9 | 73 | 27 |
| 10 | 73 | 27 |
| 11 | 73 | 27 |
| 12 | 72 | 28 |
| 13 | 72 | 28 |
| 14 | 72 | 28 |
| 15 | 72 | 28 |
| 16 | 72 | 28 |
| 17 | 73 | 27 |
| 18 | 74 | 26 |
| 19 | 75 | 25 |
| 20 | 75 | 25 |
| 21 | 76 | 24 |
| 22 | 76 | 24 |
| 23 | 77 | 23 |
| 24 | 78 | 22 |
| 25 | 79 | 21 |
| 26 | 79 | 21 |
| 27 | 80 | 20 |
| 28 | 80 | 20 |
| 29 | 80 | 20 |
| 30 | 80 | 20 |
| 31 | 80 | 20 |
Chance of precipitation in January
Waterloo gets around 16 mm of rain over 4.1 wet days in January. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 13% and peaks near 18% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 18 | 17 | 16 | 15 | 15 | 14 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 11 |
| Rain chance (%) | |
|---|---|
| 1 | 18 |
| 2 | 17 |
| 3 | 16 |
| 4 | 15 |
| 5 | 15 |
| 6 | 14 |
| 7 | 13 |
| 8 | 13 |
| 9 | 12 |
| 10 | 12 |
| 11 | 12 |
| 12 | 12 |
| 13 | 12 |
| 14 | 12 |
| 15 | 13 |
| 16 | 13 |
| 17 | 13 |
| 18 | 13 |
| 19 | 14 |
| 20 | 14 |
| 21 | 14 |
| 22 | 14 |
| 23 | 14 |
| 24 | 14 |
| 25 | 14 |
| 26 | 14 |
| 27 | 13 |
| 28 | 13 |
| 29 | 12 |
| 30 | 12 |
| 31 | 11 |
Humidity in January
Most of January feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, January lands in the oppressive band about 85% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Muggy (%) | 7 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Oppressive (%) | 82 | 82 | 81 | 82 | 82 | 82 | 83 | 84 | 84 | 84 | 86 | 86 | 87 | 87 | 87 | 87 | 87 | 87 | 87 | 87 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 87 |
| Miserable (%) | 9 | 8 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|
| 1 | 0 | 2 | 7 | 82 | 9 |
| 2 | 0 | 2 | 8 | 82 | 8 |
| 3 | 1 | 3 | 8 | 81 | 7 |
| 4 | 1 | 3 | 8 | 82 | 6 |
| 5 | 1 | 3 | 8 | 82 | 6 |
| 6 | 1 | 3 | 9 | 82 | 5 |
| 7 | 0 | 3 | 9 | 83 | 5 |
| 8 | 0 | 3 | 9 | 84 | 4 |
| 9 | 0 | 3 | 9 | 84 | 4 |
| 10 | 0 | 3 | 9 | 84 | 4 |
| 11 | 0 | 3 | 8 | 86 | 3 |
| 12 | 0 | 3 | 8 | 86 | 3 |
| 13 | 0 | 2 | 8 | 87 | 3 |
| 14 | 0 | 2 | 8 | 87 | 3 |
| 15 | 0 | 2 | 8 | 87 | 3 |
| 16 | 0 | 2 | 8 | 87 | 3 |
| 17 | 0 | 2 | 8 | 87 | 3 |
| 18 | 0 | 2 | 8 | 87 | 3 |
| 19 | 0 | 2 | 8 | 87 | 3 |
| 20 | 0 | 2 | 8 | 87 | 3 |
| 21 | 0 | 2 | 7 | 88 | 3 |
| 22 | 0 | 2 | 7 | 88 | 3 |
| 23 | 0 | 2 | 7 | 88 | 3 |
| 24 | 0 | 1 | 7 | 88 | 4 |
| 25 | 0 | 1 | 7 | 88 | 4 |
| 26 | 0 | 1 | 7 | 88 | 4 |
| 27 | 0 | 1 | 7 | 88 | 4 |
| 28 | 0 | 1 | 7 | 88 | 4 |
| 29 | 0 | 1 | 7 | 88 | 4 |
| 30 | 0 | 1 | 7 | 88 | 4 |
| 31 | 0 | 1 | 7 | 87 | 5 |
Wind in January
Winds average 9 km/h in January.
Across January, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 8 | calm |
| 2 | 8 | calm |
| 3 | 8 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
| 31 | 9 | calm |
Sunrise & sunset in January
Daylight runs from about 11 h 30 min at the start of January to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over January. Sunrise moves from 7:10 AM to 7:17 AM, and sunset from 6:41 PM to 6:55 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 |
| Sunrise (AM) | 7:10 | 7:10 | 7:11 | 7:11 | 7:11 | 7:12 | 7:12 | 7:12 | 7:13 | 7:13 | 7:13 | 7:14 | 7:14 | 7:14 | 7:14 | 7:15 | 7:15 | 7:15 | 7:15 | 7:16 | 7:16 | 7:16 | 7:16 | 7:16 | 7:16 | 7:16 | 7:16 | 7:16 | 7:17 | 7:17 | 7:17 |
| Sunset (PM) | 6:41 | 6:42 | 6:42 | 6:43 | 6:43 | 6:44 | 6:44 | 6:45 | 6:45 | 6:46 | 6:46 | 6:47 | 6:47 | 6:48 | 6:48 | 6:48 | 6:49 | 6:49 | 6:50 | 6:50 | 6:51 | 6:51 | 6:52 | 6:52 | 6:52 | 6:53 | 6:53 | 6:54 | 6:54 | 6:54 | 6:55 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.5 | 7:10 | 6:41 |
| 2 | 11.5 | 7:10 | 6:42 |
| 3 | 11.5 | 7:11 | 6:42 |
| 4 | 11.5 | 7:11 | 6:43 |
| 5 | 11.5 | 7:11 | 6:43 |
| 6 | 11.5 | 7:12 | 6:44 |
| 7 | 11.5 | 7:12 | 6:44 |
| 8 | 11.5 | 7:12 | 6:45 |
| 9 | 11.5 | 7:13 | 6:45 |
| 10 | 11.5 | 7:13 | 6:46 |
| 11 | 11.5 | 7:13 | 6:46 |
| 12 | 11.5 | 7:14 | 6:47 |
| 13 | 11.6 | 7:14 | 6:47 |
| 14 | 11.6 | 7:14 | 6:48 |
| 15 | 11.6 | 7:14 | 6:48 |
| 16 | 11.6 | 7:15 | 6:48 |
| 17 | 11.6 | 7:15 | 6:49 |
| 18 | 11.6 | 7:15 | 6:49 |
| 19 | 11.6 | 7:15 | 6:50 |
| 20 | 11.6 | 7:16 | 6:50 |
| 21 | 11.6 | 7:16 | 6:51 |
| 22 | 11.6 | 7:16 | 6:51 |
| 23 | 11.6 | 7:16 | 6:52 |
| 24 | 11.6 | 7:16 | 6:52 |
| 25 | 11.6 | 7:16 | 6:52 |
| 26 | 11.6 | 7:16 | 6:53 |
| 27 | 11.6 | 7:16 | 6:53 |
| 28 | 11.6 | 7:16 | 6:54 |
| 29 | 11.6 | 7:17 | 6:54 |
| 30 | 11.6 | 7:17 | 6:54 |
| 31 | 11.6 | 7:17 | 6:55 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 5.42 kWh/m².
For context, solar energy here swings from a low near 3.6 kWh/m² to a high of 6.01 kWh/m² in March across the year — January's 5.42 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.2 | Bright |
| 2 | 5.3 | Bright |
| 3 | 5.3 | Bright |
| 4 | 5.3 | Bright |
| 5 | 5.3 | Bright |
| 6 | 5.3 | Bright |
| 7 | 5.3 | Bright |
| 8 | 5.3 | Bright |
| 9 | 5.3 | Bright |
| 10 | 5.3 | Bright |
| 11 | 5.4 | Bright |
| 12 | 5.4 | Bright |
| 13 | 5.4 | Bright |
| 14 | 5.4 | Bright |
| 15 | 5.4 | Bright |
| 16 | 5.4 | Bright |
| 17 | 5.4 | Bright |
| 18 | 5.4 | Bright |
| 19 | 5.4 | Bright |
| 20 | 5.5 | Bright |
| 21 | 5.5 | Bright |
| 22 | 5.5 | Bright |
| 23 | 5.5 | Bright |
| 24 | 5.5 | Bright |
| 25 | 5.5 | Bright |
| 26 | 5.5 | Bright |
| 27 | 5.6 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.6 | Bright |
| 30 | 5.6 | Bright |
| 31 | 5.6 | Bright |
Hazard calendar for Waterloo
None of Waterloo's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
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 January a good time to visit Waterloo?
Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
January 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 January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, Waterloo sees daytime highs around 30°C and nights near 24°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.
Sea temperature near Waterloo in January
The nearest coast averages about 28°C in January — 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 January
Clear-sky midday UV in January peaks around 9 (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 January
Average fine-particle pollution (PM2.5) through the year — so you can see where January 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).