Usulután weather in August
In August, Usulután sees average daytime highs of 31°C and overnight lows near 25°C, with 273 mm of rain across 23.3 wet days and about 12.4 hours of daylight. It is the 8th-warmest and 4th-wettest month of the year here.
Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 16% of the time in August, and the air most often feels miserable.
Daylight stretches from about 12 h 36 min at the start of August to 12 h 18 min by month's end. Set against the rest of the year, August is Usulután's 9th-clearest and 10th-windiest month. For the whole year in context, see Usulután's year-round climate.
- Daytime high
- 31°
- 8th warmest
- Overnight low
- 25°
- 9th coldest
- Rainfall
- 273 mm
- 23.3 wet days
- Daylight
- 12 h 24 min
- 5:44 AM – 6:11 PM
- Cloud cover
- 68%
- 9th clearest
- Wind
- 6 km/h
- 10th windiest
- Solar energy
- 6.31 kWh/m²
- Travel score
- 3.2
- out of 10
Usulután is city in El Salvador.
- Density
- 371/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 31°C through the month.
A typical August day in Usulután reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, August runs on par with July and about 1°C warmer than September.
| 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) | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 25 |
| 2 | 31 | 25 |
| 3 | 31 | 25 |
| 4 | 31 | 25 |
| 5 | 31 | 25 |
| 6 | 31 | 25 |
| 7 | 31 | 25 |
| 8 | 31 | 25 |
| 9 | 31 | 25 |
| 10 | 31 | 25 |
| 11 | 31 | 25 |
| 12 | 31 | 25 |
| 13 | 31 | 25 |
| 14 | 31 | 25 |
| 15 | 31 | 25 |
| 16 | 31 | 25 |
| 17 | 31 | 25 |
| 18 | 31 | 25 |
| 19 | 31 | 25 |
| 20 | 31 | 25 |
| 21 | 31 | 25 |
| 22 | 31 | 25 |
| 23 | 31 | 25 |
| 24 | 31 | 25 |
| 25 | 31 | 25 |
| 26 | 31 | 25 |
| 27 | 30 | 25 |
| 28 | 30 | 25 |
| 29 | 30 | 25 |
| 30 | 30 | 25 |
| 31 | 30 | 25 |
How August really feels in Usulután
Once humidity and wind are folded in, August 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 August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Usulután weather by month
How August compares with the rest of the year at a glance. August is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 23° | 1 | 0.3 | 11.3 | 5.6 |
| Feb | 32° / 24° | 2 | 0.4 | 11.6 | 5.3 |
| Mar | 32° / 24° | 7 | 1.8 | 11.9 | 4.9 |
| Apr | 32° / 25° | 29 | 8.1 | 12.3 | 4.1 |
| May | 31° / 25° | 220 | 22.3 | 12.6 | 3.1 |
| Jun | 31° / 25° | 288 | 23.9 | 12.8 | 3.0 |
| Jul | 31° / 25° | 198 | 19.4 | 12.7 | 3.4 |
| Aug | 31° / 25° | 273 | 23.3 | 12.4 | 3.2 |
| Sep | 30° / 25° | 342 | 26.6 | 12.1 | 3.0 |
| Oct | 30° / 24° | 349 | 24.6 | 11.7 | 3.5 |
| Nov | 30° / 24° | 71 | 9 | 11.4 | 5.1 |
| Dec | 31° / 23° | 4 | 1.2 | 11.2 | 5.7 |
Cloud cover in August
The sky is clear or mostly clear about 16% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 64%.
| 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 (%) | 42 | 41 | 40 | 40 | 39 | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 37 | 36 | 35 | 35 | 34 | 33 | 33 | 32 | 31 | 30 | 30 | 30 | 29 | 29 | 27 |
| Cloudier (%) | 58 | 59 | 60 | 60 | 61 | 61 | 61 | 61 | 61 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 63 | 64 | 65 | 65 | 66 | 67 | 67 | 68 | 69 | 70 | 70 | 70 | 71 | 71 | 73 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 42 | 58 |
| 2 | 41 | 59 |
| 3 | 40 | 60 |
| 4 | 40 | 60 |
| 5 | 39 | 61 |
| 6 | 39 | 61 |
| 7 | 39 | 61 |
| 8 | 39 | 61 |
| 9 | 39 | 61 |
| 10 | 38 | 62 |
| 11 | 38 | 62 |
| 12 | 38 | 62 |
| 13 | 38 | 62 |
| 14 | 38 | 62 |
| 15 | 38 | 62 |
| 16 | 38 | 62 |
| 17 | 37 | 63 |
| 18 | 36 | 64 |
| 19 | 35 | 65 |
| 20 | 35 | 65 |
| 21 | 34 | 66 |
| 22 | 33 | 67 |
| 23 | 33 | 67 |
| 24 | 32 | 68 |
| 25 | 31 | 69 |
| 26 | 30 | 70 |
| 27 | 30 | 70 |
| 28 | 30 | 70 |
| 29 | 29 | 71 |
| 30 | 29 | 71 |
| 31 | 27 | 73 |
Chance of precipitation in August
Usulután gets around 273 mm of rain over 23.3 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 75% and peaks near 84% on the wettest days. The odds climb toward the end of the month.
| 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 (%) | 65 | 66 | 67 | 67 | 68 | 69 | 70 | 71 | 72 | 72 | 73 | 74 | 74 | 74 | 75 | 75 | 76 | 76 | 76 | 77 | 78 | 78 | 79 | 80 | 80 | 81 | 82 | 82 | 83 | 84 | 84 |
| Rain chance (%) | |
|---|---|
| 1 | 65 |
| 2 | 66 |
| 3 | 67 |
| 4 | 67 |
| 5 | 68 |
| 6 | 69 |
| 7 | 70 |
| 8 | 71 |
| 9 | 72 |
| 10 | 72 |
| 11 | 73 |
| 12 | 74 |
| 13 | 74 |
| 14 | 74 |
| 15 | 75 |
| 16 | 75 |
| 17 | 76 |
| 18 | 76 |
| 19 | 76 |
| 20 | 77 |
| 21 | 78 |
| 22 | 78 |
| 23 | 79 |
| 24 | 80 |
| 25 | 80 |
| 26 | 81 |
| 27 | 82 |
| 28 | 82 |
| 29 | 83 |
| 30 | 84 |
| 31 | 84 |
Humidity in August
Most of August feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the miserable band about 62% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oppressive (%) | 37 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 37 | 38 | 38 | 39 | 39 | 39 | 40 | 40 | 40 | 40 | 40 | 39 | 39 | 38 | 38 | 37 | 37 | 36 | 36 | 36 | 36 | 36 | 36 |
| Miserable (%) | 63 | 64 | 64 | 64 | 64 | 63 | 63 | 63 | 63 | 62 | 62 | 61 | 61 | 61 | 60 | 60 | 60 | 60 | 60 | 61 | 61 | 62 | 62 | 63 | 63 | 64 | 64 | 64 | 64 | 64 | 64 |
| Oppressive (%) | Miserable (%) | |
|---|---|---|
| 1 | 37 | 63 |
| 2 | 36 | 64 |
| 3 | 36 | 64 |
| 4 | 36 | 64 |
| 5 | 36 | 64 |
| 6 | 37 | 63 |
| 7 | 37 | 63 |
| 8 | 37 | 63 |
| 9 | 37 | 63 |
| 10 | 38 | 62 |
| 11 | 38 | 62 |
| 12 | 39 | 61 |
| 13 | 39 | 61 |
| 14 | 39 | 61 |
| 15 | 40 | 60 |
| 16 | 40 | 60 |
| 17 | 40 | 60 |
| 18 | 40 | 60 |
| 19 | 40 | 60 |
| 20 | 39 | 61 |
| 21 | 39 | 61 |
| 22 | 38 | 62 |
| 23 | 38 | 62 |
| 24 | 37 | 63 |
| 25 | 37 | 63 |
| 26 | 36 | 64 |
| 27 | 36 | 64 |
| 28 | 36 | 64 |
| 29 | 36 | 64 |
| 30 | 36 | 64 |
| 31 | 36 | 64 |
Wind in August
Winds average 6 km/h in August.
Across August, daily wind ranges from about 6 km/h on the calmest days to 6 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) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 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 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
| 31 | 6 | calm |
Sunrise & sunset in August
Daylight runs from about 12 h 36 min at the start of August to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 18 minutes over August. Sunrise moves from 5:42 AM to 5:46 AM, and sunset from 6:18 PM to 6:02 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) | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 |
| Sunrise (AM) | 5:42 | 5:42 | 5:42 | 5:43 | 5:43 | 5:43 | 5:43 | 5:43 | 5:43 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:46 | 5:46 | 5:46 |
| Sunset (PM) | 6:18 | 6:17 | 6:17 | 6:17 | 6:16 | 6:16 | 6:16 | 6:15 | 6:15 | 6:14 | 6:14 | 6:13 | 6:13 | 6:12 | 6:12 | 6:11 | 6:11 | 6:10 | 6:10 | 6:09 | 6:08 | 6:08 | 6:07 | 6:07 | 6:06 | 6:05 | 6:05 | 6:04 | 6:03 | 6:03 | 6:02 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.6 | 5:42 | 6:18 |
| 2 | 12.6 | 5:42 | 6:17 |
| 3 | 12.6 | 5:42 | 6:17 |
| 4 | 12.6 | 5:43 | 6:17 |
| 5 | 12.6 | 5:43 | 6:16 |
| 6 | 12.6 | 5:43 | 6:16 |
| 7 | 12.5 | 5:43 | 6:16 |
| 8 | 12.5 | 5:43 | 6:15 |
| 9 | 12.5 | 5:43 | 6:15 |
| 10 | 12.5 | 5:44 | 6:14 |
| 11 | 12.5 | 5:44 | 6:14 |
| 12 | 12.5 | 5:44 | 6:13 |
| 13 | 12.5 | 5:44 | 6:13 |
| 14 | 12.5 | 5:44 | 6:12 |
| 15 | 12.5 | 5:44 | 6:12 |
| 16 | 12.4 | 5:44 | 6:11 |
| 17 | 12.4 | 5:45 | 6:11 |
| 18 | 12.4 | 5:45 | 6:10 |
| 19 | 12.4 | 5:45 | 6:10 |
| 20 | 12.4 | 5:45 | 6:09 |
| 21 | 12.4 | 5:45 | 6:08 |
| 22 | 12.4 | 5:45 | 6:08 |
| 23 | 12.4 | 5:45 | 6:07 |
| 24 | 12.4 | 5:45 | 6:07 |
| 25 | 12.3 | 5:45 | 6:06 |
| 26 | 12.3 | 5:45 | 6:05 |
| 27 | 12.3 | 5:45 | 6:05 |
| 28 | 12.3 | 5:45 | 6:04 |
| 29 | 12.3 | 5:46 | 6:03 |
| 30 | 12.3 | 5:46 | 6:03 |
| 31 | 12.3 | 5:46 | 6:02 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 6.31 kWh/m².
For context, solar energy here swings from a low near 5.23 kWh/m² to a high of 6.75 kWh/m² in March across the year — August's 6.31 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) | 6.6 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.6 | Intense |
| 2 | 6.5 | Intense |
| 3 | 6.5 | Intense |
| 4 | 6.5 | Intense |
| 5 | 6.5 | Intense |
| 6 | 6.5 | Intense |
| 7 | 6.5 | Intense |
| 8 | 6.5 | Intense |
| 9 | 6.4 | Intense |
| 10 | 6.4 | Intense |
| 11 | 6.4 | Intense |
| 12 | 6.4 | Intense |
| 13 | 6.4 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.3 | Intense |
| 16 | 6.3 | Intense |
| 17 | 6.3 | Intense |
| 18 | 6.3 | Intense |
| 19 | 6.3 | Intense |
| 20 | 6.2 | Intense |
| 21 | 6.2 | Intense |
| 22 | 6.2 | Intense |
| 23 | 6.2 | Intense |
| 24 | 6.2 | Intense |
| 25 | 6.2 | Intense |
| 26 | 6.1 | Intense |
| 27 | 6.1 | Intense |
| 28 | 6.1 | Intense |
| 29 | 6.1 | Intense |
| 30 | 6.1 | Intense |
| 31 | 6.1 | Intense |
Hazard calendar for Usulután
In August, Usulután sits inside its atlantic hurricane and monsoon season. The full year is below, with each hazard's peak months called out.
Usulután sits in the Atlantic hurricane belt; the season peaks August–October.
Usulután's monsoon runs May–October, when most of the year's rain falls.
Is August a good time to visit Usulután?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a weaker month for outdoor sightseeing in Usulután.
What to pack for Usulután in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Usulután sees daytime highs around 31°C and nights near 25°C. Pack light clothes, rain gear and sun protection. About 23 days see rain.
Sea temperature near Usulután in August
The nearest coast averages about 30°C in August — 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 August at about 30°C and coldest in January near 28°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 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 28 |
| Comfort | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 28 | Tropical |
| Apr | 29 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Tropical |
UV index in Usulután in August
Clear-sky midday UV in August peaks 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 Usulután peaks around March 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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) | 10 | 12 | 13 | 13 | 12 | 13 | 12 | 11 | 12 | 11 | 9 | 9 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Usulután in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Usulután is worst in April — around 34 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (January, 13 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) | 13 | 15 | 22 | 34 | 32 | 21 | 25 | 20 | 18 | 17 | 16 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 15 | Moderate |
| Mar | 22 | Moderate |
| Apr | 34 | Moderate |
| May | 32 | Moderate |
| Jun | 21 | Moderate |
| Jul | 25 | Moderate |
| Aug | 20 | Moderate |
| Sep | 18 | Moderate |
| Oct | 17 | Moderate |
| Nov | 16 | Moderate |
| Dec | 13 | Moderate |
Where is Usulután?
Usulután sits at 13.3°N, 88.4°W, 100 m above sea level, in El Salvador. The nearest listed city is San Rafael Oriente, 11 km away.
Topography around Usulután
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Usulután.
Within 3 km, the terrain around Usulután has only modest variations in elevation — a maximum elevation change of 166 m around an average of 97 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,638 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,143 m.
The land around Usulután is covered by trees (53%) within 3 km, trees (45%) and grassland (26%) within 16 km, and trees (39%), water (33%) and grassland (20%) within 80 km.
El Salvador travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 115 V · 60 Hz
- Prices
- ≈ 41% of US
- price level, 2025
- GDP per capita
- $5,767
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Homicide rate
- 7.9
- per 100k, 2022
- Road deaths
- 20.9
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 523
- 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 Usulután (13.3447°, -88.4399°, elevation 100 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).