San Martín weather in April
In April, San Martín sees average daytime highs of 33°C and overnight lows near 22°C, with 56 mm of rain across 12.2 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 43% of the time in April, and the air most often feels muggy.
Daylight stretches from about 12 h 06 min at the start of April to 12 h 30 min by month's end. Set against the rest of the year, April is San Martín's 6th-clearest and 6th-windiest month. For the whole year in context, see San Martín's year-round climate.
- Daytime high
- 33°
- 3rd warmest
- Overnight low
- 22°
- 11th coldest
- Rainfall
- 56 mm
- 12.2 wet days
- Daylight
- 12 h 18 min
- 5:47 AM – 6:05 PM
- Cloud cover
- 48%
- 6th clearest
- Wind
- 5 km/h
- 6th windiest
- Solar energy
- 6.17 kWh/m²
- Travel score
- 3.3
- out of 10
San Martín is settlement in Cuscatlan, El Salvador.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Day-to-day highs hold fairly steady near 33°C through the month.
A typical April day in San Martín reaches about 33°C in the afternoon and slips back to 22°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 36°C. Set against its neighbours, April runs on par with March and about 1°C warmer than May.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 34 | 22 |
| 2 | 34 | 22 |
| 3 | 34 | 22 |
| 4 | 33 | 22 |
| 5 | 33 | 22 |
| 6 | 33 | 22 |
| 7 | 33 | 22 |
| 8 | 33 | 22 |
| 9 | 33 | 22 |
| 10 | 33 | 22 |
| 11 | 33 | 22 |
| 12 | 33 | 22 |
| 13 | 33 | 22 |
| 14 | 33 | 22 |
| 15 | 33 | 22 |
| 16 | 33 | 22 |
| 17 | 33 | 22 |
| 18 | 33 | 22 |
| 19 | 33 | 22 |
| 20 | 33 | 22 |
| 21 | 33 | 22 |
| 22 | 33 | 22 |
| 23 | 33 | 22 |
| 24 | 33 | 22 |
| 25 | 33 | 22 |
| 26 | 33 | 22 |
| 27 | 33 | 22 |
| 28 | 33 | 22 |
| 29 | 33 | 22 |
| 30 | 33 | 22 |
How April really feels in San Martín
Once humidity and wind are folded in, April averages 30 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 April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
San Martín weather by month
How April compares with the rest of the year at a glance. April is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 20° | 3 | 0.7 | 11.3 | 5.1 |
| Feb | 33° / 20° | 3 | 0.9 | 11.5 | 4.5 |
| Mar | 34° / 21° | 13 | 4 | 11.9 | 3.9 |
| Apr | 33° / 22° | 56 | 12.2 | 12.3 | 3.3 |
| May | 32° / 22° | 239 | 25.3 | 12.6 | 2.7 |
| Jun | 31° / 22° | 260 | 25.5 | 12.8 | 2.8 |
| Jul | 32° / 22° | 173 | 20.4 | 12.7 | 3.1 |
| Aug | 31° / 22° | 223 | 24.2 | 12.5 | 2.9 |
| Sep | 30° / 22° | 294 | 27.6 | 12.1 | 2.8 |
| Oct | 30° / 21° | 235 | 23.7 | 11.7 | 3.4 |
| Nov | 31° / 20° | 49 | 8.8 | 11.4 | 4.9 |
| Dec | 32° / 20° | 8 | 1.7 | 11.2 | 5.4 |
Cloud cover in April
The sky is clear or mostly clear about 43% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 29% of April, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to cloud over 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 85 | 84 | 83 | 83 | 81 | 80 | 80 | 79 | 79 | 78 | 78 | 76 | 76 | 75 | 75 | 73 | 72 | 71 | 69 | 68 | 67 | 65 | 63 | 62 | 60 | 58 | 57 | 55 | 54 | 53 |
| Cloudier (%) | 15 | 16 | 17 | 17 | 19 | 20 | 20 | 21 | 21 | 22 | 22 | 24 | 24 | 25 | 25 | 27 | 28 | 29 | 31 | 32 | 33 | 35 | 37 | 38 | 40 | 42 | 43 | 45 | 46 | 47 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 85 | 15 |
| 2 | 84 | 16 |
| 3 | 83 | 17 |
| 4 | 83 | 17 |
| 5 | 81 | 19 |
| 6 | 80 | 20 |
| 7 | 80 | 20 |
| 8 | 79 | 21 |
| 9 | 79 | 21 |
| 10 | 78 | 22 |
| 11 | 78 | 22 |
| 12 | 76 | 24 |
| 13 | 76 | 24 |
| 14 | 75 | 25 |
| 15 | 75 | 25 |
| 16 | 73 | 27 |
| 17 | 72 | 28 |
| 18 | 71 | 29 |
| 19 | 69 | 31 |
| 20 | 68 | 32 |
| 21 | 67 | 33 |
| 22 | 65 | 35 |
| 23 | 63 | 37 |
| 24 | 62 | 38 |
| 25 | 60 | 40 |
| 26 | 58 | 42 |
| 27 | 57 | 43 |
| 28 | 55 | 45 |
| 29 | 54 | 46 |
| 30 | 53 | 47 |
Chance of precipitation in April
San Martín gets around 56 mm of rain over 12.2 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 42% and peaks near 64% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 23 | 24 | 25 | 26 | 27 | 29 | 30 | 31 | 33 | 34 | 35 | 37 | 38 | 39 | 40 | 42 | 43 | 44 | 45 | 47 | 48 | 49 | 51 | 53 | 55 | 57 | 59 | 61 | 63 | 64 |
| Rain chance (%) | |
|---|---|
| 1 | 23 |
| 2 | 24 |
| 3 | 25 |
| 4 | 26 |
| 5 | 27 |
| 6 | 29 |
| 7 | 30 |
| 8 | 31 |
| 9 | 33 |
| 10 | 34 |
| 11 | 35 |
| 12 | 37 |
| 13 | 38 |
| 14 | 39 |
| 15 | 40 |
| 16 | 42 |
| 17 | 43 |
| 18 | 44 |
| 19 | 45 |
| 20 | 47 |
| 21 | 48 |
| 22 | 49 |
| 23 | 51 |
| 24 | 53 |
| 25 | 55 |
| 26 | 57 |
| 27 | 59 |
| 28 | 61 |
| 29 | 63 |
| 30 | 64 |
Humidity in April
Most of April feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the muggy band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 72% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
| Comfortable (%) | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 2 |
| Humid (%) | 30 | 30 | 29 | 28 | 28 | 27 | 26 | 25 | 25 | 24 | 23 | 23 | 22 | 22 | 21 | 20 | 20 | 19 | 18 | 18 | 17 | 16 | 15 | 14 | 14 | 13 | 12 | 11 | 11 | 10 |
| Muggy (%) | 52 | 53 | 53 | 55 | 55 | 56 | 57 | 58 | 57 | 58 | 57 | 57 | 57 | 56 | 57 | 57 | 56 | 56 | 56 | 55 | 55 | 54 | 55 | 54 | 53 | 53 | 52 | 53 | 51 | 53 |
| Oppressive (%) | 6 | 6 | 7 | 8 | 8 | 9 | 9 | 10 | 11 | 11 | 12 | 12 | 13 | 14 | 14 | 15 | 16 | 17 | 18 | 20 | 21 | 23 | 24 | 26 | 28 | 29 | 31 | 32 | 34 | 35 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 3 | 9 | 30 | 52 | 6 |
| 2 | 3 | 8 | 30 | 53 | 6 |
| 3 | 3 | 8 | 29 | 53 | 7 |
| 4 | 2 | 7 | 28 | 55 | 8 |
| 5 | 2 | 7 | 28 | 55 | 8 |
| 6 | 2 | 6 | 27 | 56 | 9 |
| 7 | 2 | 6 | 26 | 57 | 9 |
| 8 | 1 | 6 | 25 | 58 | 10 |
| 9 | 1 | 6 | 25 | 57 | 11 |
| 10 | 1 | 6 | 24 | 58 | 11 |
| 11 | 1 | 7 | 23 | 57 | 12 |
| 12 | 1 | 7 | 23 | 57 | 12 |
| 13 | 1 | 7 | 22 | 57 | 13 |
| 14 | 1 | 7 | 22 | 56 | 14 |
| 15 | 1 | 7 | 21 | 57 | 14 |
| 16 | 1 | 7 | 20 | 57 | 15 |
| 17 | 1 | 7 | 20 | 56 | 16 |
| 18 | 1 | 7 | 19 | 56 | 17 |
| 19 | 1 | 7 | 18 | 56 | 18 |
| 20 | 1 | 6 | 18 | 55 | 20 |
| 21 | 1 | 6 | 17 | 55 | 21 |
| 22 | 1 | 6 | 16 | 54 | 23 |
| 23 | 1 | 5 | 15 | 55 | 24 |
| 24 | 1 | 5 | 14 | 54 | 26 |
| 25 | 1 | 4 | 14 | 53 | 28 |
| 26 | 1 | 4 | 13 | 53 | 29 |
| 27 | 1 | 4 | 12 | 52 | 31 |
| 28 | 1 | 3 | 11 | 53 | 32 |
| 29 | 1 | 3 | 11 | 51 | 34 |
| 30 | 0 | 2 | 10 | 53 | 35 |
Wind in April
Winds average 5 km/h in April.
Across April, daily wind ranges from about 5 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
Sunrise & sunset in April
Daylight runs from about 12 h 06 min at the start of April to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 24 minutes over April. Sunrise moves from 5:57 AM to 5:39 AM, and sunset from 6:04 PM to 6:07 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 |
| Sunrise (AM) | 5:57 | 5:56 | 5:55 | 5:55 | 5:54 | 5:53 | 5:53 | 5:52 | 5:51 | 5:51 | 5:50 | 5:49 | 5:49 | 5:48 | 5:47 | 5:47 | 5:46 | 5:45 | 5:45 | 5:44 | 5:44 | 5:43 | 5:42 | 5:42 | 5:41 | 5:41 | 5:40 | 5:40 | 5:39 | 5:39 |
| Sunset (PM) | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:05 | 6:05 | 6:05 | 6:05 | 6:05 | 6:05 | 6:05 | 6:05 | 6:05 | 6:05 | 6:06 | 6:06 | 6:06 | 6:06 | 6:06 | 6:06 | 6:07 | 6:07 | 6:07 | 6:07 | 6:07 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.1 | 5:57 | 6:04 |
| 2 | 12.1 | 5:56 | 6:04 |
| 3 | 12.1 | 5:55 | 6:04 |
| 4 | 12.2 | 5:55 | 6:04 |
| 5 | 12.2 | 5:54 | 6:04 |
| 6 | 12.2 | 5:53 | 6:04 |
| 7 | 12.2 | 5:53 | 6:04 |
| 8 | 12.2 | 5:52 | 6:04 |
| 9 | 12.2 | 5:51 | 6:04 |
| 10 | 12.2 | 5:51 | 6:05 |
| 11 | 12.2 | 5:50 | 6:05 |
| 12 | 12.3 | 5:49 | 6:05 |
| 13 | 12.3 | 5:49 | 6:05 |
| 14 | 12.3 | 5:48 | 6:05 |
| 15 | 12.3 | 5:47 | 6:05 |
| 16 | 12.3 | 5:47 | 6:05 |
| 17 | 12.3 | 5:46 | 6:05 |
| 18 | 12.3 | 5:45 | 6:05 |
| 19 | 12.3 | 5:45 | 6:05 |
| 20 | 12.4 | 5:44 | 6:06 |
| 21 | 12.4 | 5:44 | 6:06 |
| 22 | 12.4 | 5:43 | 6:06 |
| 23 | 12.4 | 5:42 | 6:06 |
| 24 | 12.4 | 5:42 | 6:06 |
| 25 | 12.4 | 5:41 | 6:06 |
| 26 | 12.4 | 5:41 | 6:07 |
| 27 | 12.4 | 5:40 | 6:07 |
| 28 | 12.5 | 5:40 | 6:07 |
| 29 | 12.5 | 5:39 | 6:07 |
| 30 | 12.5 | 5:39 | 6:07 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 6.17 kWh/m².
For context, solar energy here swings from a low near 4.79 kWh/m² to a high of 6.28 kWh/m² in March across the year — April's 6.17 kWh/m² sits near the top of that range.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 |
| 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 |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.2 | Intense |
| 2 | 6.2 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.2 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.2 | Intense |
| 8 | 6.2 | Intense |
| 9 | 6.2 | Intense |
| 10 | 6.2 | Intense |
| 11 | 6.2 | Intense |
| 12 | 6.2 | Intense |
| 13 | 6.2 | Intense |
| 14 | 6.2 | Intense |
| 15 | 6.2 | Intense |
| 16 | 6.2 | Intense |
| 17 | 6.2 | Intense |
| 18 | 6.2 | Intense |
| 19 | 6.2 | Intense |
| 20 | 6.2 | Intense |
| 21 | 6.1 | Intense |
| 22 | 6.1 | Intense |
| 23 | 6.1 | Intense |
| 24 | 6.1 | Intense |
| 25 | 6.1 | Intense |
| 26 | 6.1 | Intense |
| 27 | 6.1 | Intense |
| 28 | 6.0 | Intense |
| 29 | 6.0 | Intense |
| 30 | 6.0 | Intense |
Hazard calendar for San Martín
None of San Martín's seasonal hazards are active in April. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
San Martín sits in the Atlantic hurricane belt; the season peaks August–October.
San Martín's monsoon runs May–October, when most of the year's rain falls.
Is April a good time to visit San Martín?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a weaker month for outdoor sightseeing in San Martín.
What to pack for San Martín in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, San Martín sees daytime highs around 33°C and nights near 22°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.
Sea temperature near San Martín in April
The nearest coast averages about 29°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 51 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 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 28 | Tropical |
| Mar | 29 | 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 | 29 | Tropical |
UV index in San Martín in April
Clear-sky midday UV in April peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Martín peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 | 13 | 13 | 13 | 12 | 13 | 12 | 12 | 12 | 11 | 9 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 13 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in San Martín in April
Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.
Air quality in San Martín is worst in April — around 43 µg/m³ PM2.5 (poor), about 1.6× the cleanest month (September, 26 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) | 34 | 35 | 35 | 43 | 40 | 27 | 30 | 27 | 26 | 29 | 35 | 36 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 34 | Moderate |
| Feb | 35 | Moderate |
| Mar | 35 | Poor |
| Apr | 43 | Poor |
| May | 40 | Poor |
| Jun | 27 | Moderate |
| Jul | 30 | Moderate |
| Aug | 27 | Moderate |
| Sep | 26 | Moderate |
| Oct | 29 | Moderate |
| Nov | 35 | Moderate |
| Dec | 36 | Poor |
Where is San Martín?
San Martín sits at 13.8°N, 88.9°W, 622 m above sea level, in El Salvador. The nearest listed city is Cojutepeque, 7.0 km away.
Topography around San Martín
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Martín.
Within 3 km, the terrain around San Martín has significant variations in elevation — a maximum elevation change of 399 m around an average of 638 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 826 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,703 m.
The land around San Martín is covered by trees (64%) and grassland (32%) within 3 km, trees (61%) and grassland (31%) within 16 km, and trees (54%) and grassland (23%) 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 San Martín (13.7833°, -88.9167°, elevation 622 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).