San Sebastián weather in March
In March, San Sebastián sees average daytime highs of 33°C and overnight lows near 23°C, with 36 mm of rain across 8.5 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 9th-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 56% of the time in March, and the air most often feels muggy.
Daylight stretches from about 11 h 42 min at the start of March to 12 h 06 min by month's end. Set against the rest of the year, March is San Sebastián's 4th-clearest and 1st-windiest month. For the whole year in context, see San Sebastián's year-round climate.
- Daytime high
- 33°
- 2nd warmest
- Overnight low
- 23°
- 5th coldest
- Rainfall
- 36 mm
- 8.5 wet days
- Daylight
- 11 h 54 min
- 6:19 AM – 6:13 PM
- Cloud cover
- 39%
- 4th clearest
- Wind
- 5 km/h
- 1st windiest
- Solar energy
- 6.17 kWh/m²
- Travel score
- 4.0
- out of 10
Temperature in March
Day-to-day highs hold fairly steady near 33°C through the month.
A typical March day in San Sebastián reaches about 33°C in the afternoon and slips back to 23°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 34°C. Set against its neighbours, March runs on par with February and on par with April.
| 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) | 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 | 33 | 33 | 33 | 33 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 33 | 22 |
| 2 | 33 | 22 |
| 3 | 33 | 22 |
| 4 | 33 | 22 |
| 5 | 33 | 22 |
| 6 | 33 | 22 |
| 7 | 33 | 22 |
| 8 | 33 | 22 |
| 9 | 33 | 22 |
| 10 | 33 | 22 |
| 11 | 33 | 23 |
| 12 | 33 | 23 |
| 13 | 33 | 23 |
| 14 | 33 | 23 |
| 15 | 33 | 23 |
| 16 | 33 | 23 |
| 17 | 33 | 23 |
| 18 | 33 | 23 |
| 19 | 33 | 23 |
| 20 | 33 | 23 |
| 21 | 33 | 23 |
| 22 | 33 | 23 |
| 23 | 33 | 23 |
| 24 | 33 | 23 |
| 25 | 33 | 23 |
| 26 | 33 | 23 |
| 27 | 33 | 23 |
| 28 | 33 | 23 |
| 29 | 33 | 23 |
| 30 | 33 | 23 |
| 31 | 33 | 23 |
How March really feels in San Sebastián
Once humidity and wind are folded in, March 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 March is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
San Sebastián weather by month
How March compares with the rest of the year at a glance. March is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 21° | 18 | 4.9 | 11.2 | 5.3 |
| Feb | 32° / 22° | 15 | 3.8 | 11.5 | 4.8 |
| Mar | 33° / 23° | 36 | 8.5 | 11.9 | 4.0 |
| Apr | 33° / 23° | 94 | 14.4 | 12.3 | 3.2 |
| May | 32° / 24° | 351 | 27 | 12.7 | 2.6 |
| Jun | 30° / 23° | 374 | 28.4 | 12.8 | 2.6 |
| Jul | 31° / 23° | 287 | 27 | 12.8 | 2.8 |
| Aug | 30° / 23° | 361 | 28.6 | 12.5 | 2.7 |
| Sep | 30° / 23° | 456 | 29.2 | 12.1 | 2.6 |
| Oct | 30° / 23° | 384 | 27.7 | 11.7 | 3.0 |
| Nov | 30° / 23° | 116 | 15.5 | 11.3 | 4.4 |
| Dec | 31° / 22° | 27 | 6.1 | 11.2 | 5.4 |
Cloud cover in March
The sky is clear or mostly clear about 56% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 28% of March, with mostly cloudy or overcast conditions the remaining 16%. 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 88 | 88 | 88 | 88 | 87 | 87 | 86 | 85 | 85 | 85 | 85 | 83 | 83 | 83 | 82 | 82 | 82 | 82 | 81 | 81 | 81 | 82 | 82 | 82 | 82 | 83 | 83 | 83 | 83 | 83 | 83 |
| Cloudier (%) | 12 | 12 | 12 | 12 | 13 | 13 | 14 | 15 | 15 | 15 | 15 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 88 | 12 |
| 2 | 88 | 12 |
| 3 | 88 | 12 |
| 4 | 88 | 12 |
| 5 | 87 | 13 |
| 6 | 87 | 13 |
| 7 | 86 | 14 |
| 8 | 85 | 15 |
| 9 | 85 | 15 |
| 10 | 85 | 15 |
| 11 | 85 | 15 |
| 12 | 83 | 17 |
| 13 | 83 | 17 |
| 14 | 83 | 17 |
| 15 | 82 | 18 |
| 16 | 82 | 18 |
| 17 | 82 | 18 |
| 18 | 82 | 18 |
| 19 | 81 | 19 |
| 20 | 81 | 19 |
| 21 | 81 | 19 |
| 22 | 82 | 18 |
| 23 | 82 | 18 |
| 24 | 82 | 18 |
| 25 | 82 | 18 |
| 26 | 83 | 17 |
| 27 | 83 | 17 |
| 28 | 83 | 17 |
| 29 | 83 | 17 |
| 30 | 83 | 17 |
| 31 | 83 | 17 |
Chance of precipitation in March
San Sebastián gets around 36 mm of rain over 8.5 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 27% and peaks near 33% 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 (%) | 18 | 19 | 19 | 20 | 21 | 22 | 23 | 24 | 24 | 25 | 25 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 30 | 30 | 30 | 31 | 31 | 31 | 32 | 32 | 32 | 33 | 33 | 33 | 33 |
| Rain chance (%) | |
|---|---|
| 1 | 18 |
| 2 | 19 |
| 3 | 19 |
| 4 | 20 |
| 5 | 21 |
| 6 | 22 |
| 7 | 23 |
| 8 | 24 |
| 9 | 24 |
| 10 | 25 |
| 11 | 25 |
| 12 | 26 |
| 13 | 27 |
| 14 | 27 |
| 15 | 28 |
| 16 | 28 |
| 17 | 29 |
| 18 | 29 |
| 19 | 30 |
| 20 | 30 |
| 21 | 30 |
| 22 | 31 |
| 23 | 31 |
| 24 | 31 |
| 25 | 32 |
| 26 | 32 |
| 27 | 32 |
| 28 | 33 |
| 29 | 33 |
| 30 | 33 |
| 31 | 33 |
Humidity in March
Most of March feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the muggy band about 62% of days. Sticky, muggy-or-worse air turns up on roughly 88% 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 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Humid (%) | 20 | 19 | 19 | 18 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 5 |
| Muggy (%) | 67 | 68 | 67 | 67 | 67 | 67 | 66 | 66 | 65 | 65 | 64 | 65 | 64 | 64 | 63 | 63 | 62 | 62 | 61 | 61 | 61 | 60 | 60 | 59 | 58 | 57 | 56 | 57 | 56 | 55 | 55 |
| Oppressive (%) | 13 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 29 | 30 | 31 | 32 | 33 | 33 | 35 | 36 | 37 | 38 | 39 | 40 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 0 | 20 | 67 | 13 |
| 2 | 0 | 19 | 68 | 13 |
| 3 | 0 | 19 | 67 | 14 |
| 4 | 0 | 18 | 67 | 15 |
| 5 | 0 | 17 | 67 | 16 |
| 6 | 0 | 16 | 67 | 17 |
| 7 | 0 | 16 | 66 | 18 |
| 8 | 0 | 15 | 66 | 19 |
| 9 | 0 | 15 | 65 | 20 |
| 10 | 0 | 14 | 65 | 21 |
| 11 | 0 | 14 | 64 | 22 |
| 12 | 0 | 13 | 65 | 22 |
| 13 | 0 | 13 | 64 | 23 |
| 14 | 0 | 12 | 64 | 24 |
| 15 | 0 | 12 | 63 | 25 |
| 16 | 0 | 11 | 63 | 26 |
| 17 | 0 | 11 | 62 | 27 |
| 18 | 0 | 10 | 62 | 28 |
| 19 | 0 | 10 | 61 | 29 |
| 20 | 0 | 10 | 61 | 29 |
| 21 | 0 | 9 | 61 | 30 |
| 22 | 0 | 9 | 60 | 31 |
| 23 | 0 | 8 | 60 | 32 |
| 24 | 0 | 8 | 59 | 33 |
| 25 | 1 | 8 | 58 | 33 |
| 26 | 1 | 7 | 57 | 35 |
| 27 | 1 | 7 | 56 | 36 |
| 28 | 0 | 6 | 57 | 37 |
| 29 | 0 | 6 | 56 | 38 |
| 30 | 0 | 6 | 55 | 39 |
| 31 | 0 | 5 | 55 | 40 |
Wind in March
Winds average 5 km/h in March, the windiest month of the year.
Across March, 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 6 | 6 | 6 | 6 | 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 |
| 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 | 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 |
| 31 | 5 | calm |
Sunrise & sunset in March
Daylight runs from about 11 h 42 min at the start of March to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 24 minutes over March. Sunrise moves from 6:29 AM to 6:08 AM, and sunset from 6:11 PM to 6:15 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) | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Sunrise (AM) | 6:29 | 6:28 | 6:28 | 6:27 | 6:27 | 6:26 | 6:25 | 6:25 | 6:24 | 6:23 | 6:23 | 6:22 | 6:21 | 6:21 | 6:20 | 6:19 | 6:19 | 6:18 | 6:17 | 6:16 | 6:16 | 6:15 | 6:14 | 6:13 | 6:13 | 6:12 | 6:11 | 6:11 | 6:10 | 6:09 | 6:08 |
| Sunset (PM) | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:12 | 6:12 | 6:12 | 6:12 | 6:12 | 6:13 | 6:13 | 6:13 | 6:13 | 6:13 | 6:13 | 6:13 | 6:13 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:15 | 6:15 | 6:15 | 6:15 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.7 | 6:29 | 6:11 |
| 2 | 11.7 | 6:28 | 6:11 |
| 3 | 11.7 | 6:28 | 6:11 |
| 4 | 11.7 | 6:27 | 6:11 |
| 5 | 11.7 | 6:27 | 6:11 |
| 6 | 11.8 | 6:26 | 6:12 |
| 7 | 11.8 | 6:25 | 6:12 |
| 8 | 11.8 | 6:25 | 6:12 |
| 9 | 11.8 | 6:24 | 6:12 |
| 10 | 11.8 | 6:23 | 6:12 |
| 11 | 11.8 | 6:23 | 6:13 |
| 12 | 11.8 | 6:22 | 6:13 |
| 13 | 11.9 | 6:21 | 6:13 |
| 14 | 11.9 | 6:21 | 6:13 |
| 15 | 11.9 | 6:20 | 6:13 |
| 16 | 11.9 | 6:19 | 6:13 |
| 17 | 11.9 | 6:19 | 6:13 |
| 18 | 11.9 | 6:18 | 6:13 |
| 19 | 11.9 | 6:17 | 6:14 |
| 20 | 12.0 | 6:16 | 6:14 |
| 21 | 12.0 | 6:16 | 6:14 |
| 22 | 12.0 | 6:15 | 6:14 |
| 23 | 12.0 | 6:14 | 6:14 |
| 24 | 12.0 | 6:13 | 6:14 |
| 25 | 12.0 | 6:13 | 6:14 |
| 26 | 12.0 | 6:12 | 6:14 |
| 27 | 12.1 | 6:11 | 6:14 |
| 28 | 12.1 | 6:11 | 6:15 |
| 29 | 12.1 | 6:10 | 6:15 |
| 30 | 12.1 | 6:09 | 6:15 |
| 31 | 12.1 | 6:08 | 6:15 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 6.17 kWh/m².
For context, solar energy here swings from a low near 4.61 kWh/m² to a high of 6.34 kWh/m² in April across the year — March'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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.0 | 6.0 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 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 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 |
| 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 | 6.0 | Intense |
| 2 | 6.0 | Intense |
| 3 | 6.1 | Intense |
| 4 | 6.1 | Intense |
| 5 | 6.1 | Intense |
| 6 | 6.1 | Intense |
| 7 | 6.1 | Intense |
| 8 | 6.1 | Intense |
| 9 | 6.1 | 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 | 6.2 | Intense |
| 22 | 6.2 | Intense |
| 23 | 6.2 | Intense |
| 24 | 6.2 | Intense |
| 25 | 6.2 | Intense |
| 26 | 6.2 | Intense |
| 27 | 6.3 | Intense |
| 28 | 6.3 | Intense |
| 29 | 6.3 | Intense |
| 30 | 6.3 | Intense |
| 31 | 6.3 | Intense |
Hazard calendar for San Sebastián
None of San Sebastián's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
San Sebastián sits in the Atlantic hurricane belt; the season peaks August–October.
San Sebastián's rainy season runs May–October, when most of the year's rain falls.
Is March a good time to visit San Sebastián?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is a reasonable time to visit San Sebastián for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for San Sebastián in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, San Sebastián sees daytime highs around 33°C and nights near 23°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.
Sea temperature near San Sebastián in March
The nearest coast averages about 29°C in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 49 km away) is warmest in July at about 30°C and coldest in February near 29°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) | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 29 | 30 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | 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 | 30 | Tropical |
| Dec | 29 | Tropical |
UV index in San Sebastián in March
Clear-sky midday UV in March peaks 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 San Sebastián peaks around March 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 | 11 | 12 | 12 | 11 | 12 | 11 | 11 | 11 | 10 | 8 | 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 | 11 | Extreme |
| Mar | 12 | Extreme |
| Apr | 12 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Air quality in San Sebastián in March
Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.
Air quality in San Sebastián is worst in December — around 45 µg/m³ PM2.5 (poor), about 1.6× the cleanest month (June, 28 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) | 44 | 45 | 41 | 44 | 40 | 28 | 29 | 29 | 29 | 30 | 37 | 45 |
| Level | Poor | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 44 | Poor |
| Feb | 45 | Poor |
| Mar | 41 | Poor |
| Apr | 44 | Poor |
| May | 40 | Poor |
| Jun | 28 | Moderate |
| Jul | 29 | Moderate |
| Aug | 29 | Moderate |
| Sep | 29 | Moderate |
| Oct | 30 | Moderate |
| Nov | 37 | Poor |
| Dec | 45 | Poor |
Where is San Sebastián?
San Sebastián sits at 14.6°N, 91.6°W, 313 m above sea level, in Guatemala. The nearest listed city is Retalhuleu, 4.0 km away.
Topography around San Sebastián
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Sebastián.
Within 3 km, the terrain around San Sebastián has only modest variations in elevation — a maximum elevation change of 150 m around an average of 314 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,200 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,178 m.
The land around San Sebastián is covered by trees (66%) and grassland (20%) within 3 km, trees (71%) within 16 km, and trees (53%) and water (20%) within 80 km.
Guatemala travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 43% of US
- price level, 2025
- GDP per capita
- $6,598
- 2025
- Happiness
- 6.5 / 10
- World Happiness, 2025
- Safe drinking water
- 49%
- of population, 2024
- Homicide rate
- 23.4
- per 100k, 2023
- Road deaths
- 22.9
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 510
- 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 Sebastián (14.5618°, -91.6487°, elevation 313 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).