San Fernando weather in May
In May, San Fernando sees average daytime highs of 33°C and overnight lows near 23°C, with 49 mm of rain across 6.5 wet days and about 13.2 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.
Highs climb over the month, from about 32°C in the first days to 34°C by the end. The sky is clear or mostly clear about 40% of the time in May, and the air most often feels oppressive.
Daylight stretches from about 12 h 54 min at the start of May to 13 h 24 min by month's end. Set against the rest of the year, May is San Fernando's 6th-clearest and 1st-windiest month. For the whole year in context, see San Fernando's year-round climate.
- Daytime high
- 33°
- 4th warmest
- Overnight low
- 23°
- 8th coldest
- Rainfall
- 49 mm
- 6.5 wet days
- Daylight
- 13 h 12 min
- 5:53 AM – 7:05 PM
- Cloud cover
- 49%
- 6th clearest
- Wind
- 16 km/h
- 1st windiest
- Solar energy
- 6.36 kWh/m²
- Travel score
- 3.8
- out of 10
San Fernando is municipal seat of San Fernando, State of Tamaulipas, Mexico.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Highs climb over the month, from about 32°C in the first days to 34°C by the end.
A typical May day in San Fernando 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 29°C and 37°C. Set against its neighbours, May runs about 2°C warmer than April and about 1°C cooler than June.
| 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) | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 32 | 22 |
| 2 | 32 | 22 |
| 3 | 32 | 22 |
| 4 | 32 | 22 |
| 5 | 33 | 22 |
| 6 | 33 | 22 |
| 7 | 33 | 22 |
| 8 | 33 | 22 |
| 9 | 33 | 23 |
| 10 | 33 | 23 |
| 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 | 34 | 23 |
| 23 | 34 | 24 |
| 24 | 34 | 24 |
| 25 | 34 | 24 |
| 26 | 34 | 24 |
| 27 | 34 | 24 |
| 28 | 34 | 24 |
| 29 | 34 | 24 |
| 30 | 34 | 24 |
| 31 | 34 | 24 |
How May really feels in San Fernando
Once humidity and wind are folded in, May 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 May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
San Fernando weather by month
How May compares with the rest of the year at a glance. May is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 23° / 12° | 25 | 4.4 | 10.6 | 7.7 |
| Feb | 25° / 14° | 20 | 3.9 | 11.1 | 7.8 |
| Mar | 28° / 17° | 32 | 4.9 | 11.8 | 6.8 |
| Apr | 31° / 20° | 45 | 5.2 | 12.6 | 5.1 |
| May | 33° / 23° | 49 | 6.5 | 13.2 | 3.8 |
| Jun | 35° / 25° | 63 | 9.9 | 13.5 | 2.8 |
| Jul | 35° / 25° | 69 | 8.8 | 13.4 | 2.6 |
| Aug | 35° / 25° | 57 | 9.5 | 12.9 | 2.4 |
| Sep | 33° / 23° | 119 | 14.5 | 12.2 | 3.3 |
| Oct | 30° / 20° | 67 | 8.2 | 11.4 | 5.4 |
| Nov | 26° / 16° | 35 | 5.3 | 10.8 | 7.5 |
| Dec | 23° / 13° | 24 | 4.1 | 10.5 | 7.9 |
Cloud cover in May
The sky is clear or mostly clear about 40% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 23% of May, with mostly cloudy or overcast conditions the remaining 37%. 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 (%) | 56 | 56 | 57 | 56 | 57 | 57 | 57 | 57 | 58 | 58 | 59 | 59 | 59 | 60 | 60 | 62 | 62 | 63 | 63 | 64 | 65 | 66 | 67 | 67 | 69 | 70 | 70 | 72 | 73 | 73 | 74 |
| Cloudier (%) | 44 | 44 | 43 | 44 | 43 | 43 | 43 | 43 | 42 | 42 | 41 | 41 | 41 | 40 | 40 | 38 | 38 | 37 | 37 | 36 | 35 | 34 | 33 | 33 | 31 | 30 | 30 | 28 | 27 | 27 | 26 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 56 | 44 |
| 2 | 56 | 44 |
| 3 | 57 | 43 |
| 4 | 56 | 44 |
| 5 | 57 | 43 |
| 6 | 57 | 43 |
| 7 | 57 | 43 |
| 8 | 57 | 43 |
| 9 | 58 | 42 |
| 10 | 58 | 42 |
| 11 | 59 | 41 |
| 12 | 59 | 41 |
| 13 | 59 | 41 |
| 14 | 60 | 40 |
| 15 | 60 | 40 |
| 16 | 62 | 38 |
| 17 | 62 | 38 |
| 18 | 63 | 37 |
| 19 | 63 | 37 |
| 20 | 64 | 36 |
| 21 | 65 | 35 |
| 22 | 66 | 34 |
| 23 | 67 | 33 |
| 24 | 67 | 33 |
| 25 | 69 | 31 |
| 26 | 70 | 30 |
| 27 | 70 | 30 |
| 28 | 72 | 28 |
| 29 | 73 | 27 |
| 30 | 73 | 27 |
| 31 | 74 | 26 |
Chance of precipitation in May
San Fernando gets around 49 mm of rain over 6.5 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 21% and peaks near 26% 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 (%) | 15 | 15 | 15 | 15 | 16 | 16 | 17 | 18 | 19 | 20 | 20 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 25 | 25 | 26 | 26 |
| Rain chance (%) | |
|---|---|
| 1 | 15 |
| 2 | 15 |
| 3 | 15 |
| 4 | 15 |
| 5 | 16 |
| 6 | 16 |
| 7 | 17 |
| 8 | 18 |
| 9 | 19 |
| 10 | 20 |
| 11 | 20 |
| 12 | 21 |
| 13 | 22 |
| 14 | 22 |
| 15 | 22 |
| 16 | 23 |
| 17 | 23 |
| 18 | 23 |
| 19 | 23 |
| 20 | 23 |
| 21 | 23 |
| 22 | 23 |
| 23 | 23 |
| 24 | 24 |
| 25 | 24 |
| 26 | 24 |
| 27 | 24 |
| 28 | 25 |
| 29 | 25 |
| 30 | 26 |
| 31 | 26 |
Humidity in May
Most of May feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the oppressive band about 64% of days. Sticky, muggy-or-worse air turns up on roughly 91% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 11 | 11 | 10 | 10 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 |
| Muggy (%) | 27 | 26 | 25 | 24 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 18 | 17 | 16 | 15 | 13 | 12 | 11 | 10 | 9 | 8 | 8 |
| Oppressive (%) | 49 | 50 | 53 | 53 | 55 | 56 | 58 | 60 | 59 | 60 | 60 | 62 | 61 | 61 | 61 | 64 | 64 | 64 | 64 | 65 | 68 | 68 | 69 | 70 | 71 | 73 | 75 | 75 | 76 | 76 | 76 |
| Miserable (%) | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 13 | 14 | 15 | 15 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 5 | 6 | 11 | 27 | 49 | 3 |
| 2 | 4 | 6 | 11 | 26 | 50 | 3 |
| 3 | 4 | 5 | 10 | 25 | 53 | 3 |
| 4 | 4 | 5 | 10 | 24 | 53 | 4 |
| 5 | 4 | 5 | 9 | 23 | 55 | 4 |
| 6 | 3 | 5 | 8 | 23 | 56 | 5 |
| 7 | 3 | 4 | 8 | 22 | 58 | 5 |
| 8 | 2 | 4 | 7 | 22 | 60 | 5 |
| 9 | 2 | 4 | 7 | 22 | 59 | 6 |
| 10 | 2 | 4 | 6 | 22 | 60 | 6 |
| 11 | 1 | 4 | 6 | 22 | 60 | 7 |
| 12 | 1 | 3 | 5 | 22 | 62 | 7 |
| 13 | 1 | 3 | 5 | 22 | 61 | 8 |
| 14 | 1 | 3 | 5 | 22 | 61 | 8 |
| 15 | 1 | 3 | 5 | 22 | 61 | 8 |
| 16 | 0 | 2 | 4 | 21 | 64 | 9 |
| 17 | 0 | 2 | 4 | 21 | 64 | 9 |
| 18 | 0 | 2 | 4 | 20 | 64 | 10 |
| 19 | 0 | 2 | 4 | 20 | 64 | 10 |
| 20 | 0 | 2 | 4 | 19 | 65 | 10 |
| 21 | 0 | 1 | 3 | 18 | 68 | 10 |
| 22 | 0 | 1 | 3 | 17 | 68 | 11 |
| 23 | 0 | 1 | 3 | 16 | 69 | 11 |
| 24 | 0 | 1 | 3 | 15 | 70 | 11 |
| 25 | 0 | 1 | 3 | 13 | 71 | 12 |
| 26 | 0 | 1 | 2 | 12 | 73 | 12 |
| 27 | 0 | 0 | 2 | 11 | 75 | 12 |
| 28 | 0 | 0 | 2 | 10 | 75 | 13 |
| 29 | 0 | 0 | 1 | 9 | 76 | 14 |
| 30 | 0 | 0 | 1 | 8 | 76 | 15 |
| 31 | 0 | 0 | 1 | 8 | 76 | 15 |
Wind in May
Winds average 16 km/h in May, the windiest month of the year.
Across May, daily wind ranges from about 15 km/h on the calmest days to 17 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) | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 16 | light breeze |
| 2 | 17 | light breeze |
| 3 | 17 | light breeze |
| 4 | 17 | light breeze |
| 5 | 17 | light breeze |
| 6 | 17 | light breeze |
| 7 | 17 | light breeze |
| 8 | 17 | light breeze |
| 9 | 16 | light breeze |
| 10 | 16 | light breeze |
| 11 | 16 | light breeze |
| 12 | 16 | light breeze |
| 13 | 16 | light breeze |
| 14 | 16 | light breeze |
| 15 | 16 | light breeze |
| 16 | 16 | light breeze |
| 17 | 16 | light breeze |
| 18 | 16 | light breeze |
| 19 | 16 | light breeze |
| 20 | 16 | light breeze |
| 21 | 16 | light breeze |
| 22 | 16 | light breeze |
| 23 | 16 | light breeze |
| 24 | 16 | light breeze |
| 25 | 16 | light breeze |
| 26 | 16 | light breeze |
| 27 | 16 | light breeze |
| 28 | 16 | light breeze |
| 29 | 16 | light breeze |
| 30 | 16 | light breeze |
| 31 | 15 | light breeze |
Sunrise & sunset in May
Daylight runs from about 12 h 54 min at the start of May to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 30 minutes over May. Sunrise moves from 6:02 AM to 5:48 AM, and sunset from 6:57 PM to 7:12 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) | 12.9 | 12.9 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 |
| Sunrise (AM) | 6:02 | 6:02 | 6:01 | 6:00 | 5:59 | 5:59 | 5:58 | 5:57 | 5:57 | 5:56 | 5:55 | 5:55 | 5:54 | 5:54 | 5:53 | 5:53 | 5:52 | 5:52 | 5:51 | 5:51 | 5:50 | 5:50 | 5:50 | 5:49 | 5:49 | 5:49 | 5:48 | 5:48 | 5:48 | 5:48 | 5:48 |
| Sunset (PM) | 6:57 | 6:58 | 6:58 | 6:59 | 6:59 | 7:00 | 7:00 | 7:01 | 7:01 | 7:02 | 7:02 | 7:03 | 7:03 | 7:04 | 7:04 | 7:05 | 7:05 | 7:06 | 7:07 | 7:07 | 7:08 | 7:08 | 7:09 | 7:09 | 7:10 | 7:10 | 7:11 | 7:11 | 7:12 | 7:12 | 7:12 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.9 | 6:02 | 6:57 |
| 2 | 12.9 | 6:02 | 6:58 |
| 3 | 13.0 | 6:01 | 6:58 |
| 4 | 13.0 | 6:00 | 6:59 |
| 5 | 13.0 | 5:59 | 6:59 |
| 6 | 13.0 | 5:59 | 7:00 |
| 7 | 13.0 | 5:58 | 7:00 |
| 8 | 13.1 | 5:57 | 7:01 |
| 9 | 13.1 | 5:57 | 7:01 |
| 10 | 13.1 | 5:56 | 7:02 |
| 11 | 13.1 | 5:55 | 7:02 |
| 12 | 13.1 | 5:55 | 7:03 |
| 13 | 13.2 | 5:54 | 7:03 |
| 14 | 13.2 | 5:54 | 7:04 |
| 15 | 13.2 | 5:53 | 7:04 |
| 16 | 13.2 | 5:53 | 7:05 |
| 17 | 13.2 | 5:52 | 7:05 |
| 18 | 13.2 | 5:52 | 7:06 |
| 19 | 13.3 | 5:51 | 7:07 |
| 20 | 13.3 | 5:51 | 7:07 |
| 21 | 13.3 | 5:50 | 7:08 |
| 22 | 13.3 | 5:50 | 7:08 |
| 23 | 13.3 | 5:50 | 7:09 |
| 24 | 13.3 | 5:49 | 7:09 |
| 25 | 13.3 | 5:49 | 7:10 |
| 26 | 13.4 | 5:49 | 7:10 |
| 27 | 13.4 | 5:48 | 7:11 |
| 28 | 13.4 | 5:48 | 7:11 |
| 29 | 13.4 | 5:48 | 7:12 |
| 30 | 13.4 | 5:48 | 7:12 |
| 31 | 13.4 | 5:48 | 7:12 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 6.36 kWh/m².
For context, solar energy here swings from a low near 3.35 kWh/m² to a high of 6.8 kWh/m² in July across the year — May's 6.36 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) | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.6 | 6.6 | 6.6 | 6.6 |
| 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 | 6.2 | Intense |
| 2 | 6.2 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.2 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.3 | Intense |
| 8 | 6.3 | Intense |
| 9 | 6.3 | Intense |
| 10 | 6.3 | Intense |
| 11 | 6.3 | Intense |
| 12 | 6.3 | Intense |
| 13 | 6.3 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.3 | Intense |
| 16 | 6.3 | Intense |
| 17 | 6.4 | Intense |
| 18 | 6.4 | Intense |
| 19 | 6.4 | Intense |
| 20 | 6.4 | Intense |
| 21 | 6.4 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.5 | Intense |
| 24 | 6.5 | Intense |
| 25 | 6.5 | Intense |
| 26 | 6.5 | Intense |
| 27 | 6.5 | Intense |
| 28 | 6.6 | Intense |
| 29 | 6.6 | Intense |
| 30 | 6.6 | Intense |
| 31 | 6.6 | Intense |
Hazard calendar for San Fernando
None of San Fernando's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
San Fernando sits in the Atlantic hurricane belt; the season peaks August–October.
San Fernando's rainy season runs June–October, when most of the year's rain falls.
Is May a good time to visit San Fernando?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a weaker month for outdoor sightseeing in San Fernando. The water and warmth also suit a beach or pool day.
What to pack for San Fernando in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, San Fernando sees daytime highs around 33°C and nights near 23°C. Pack light clothes and sun protection. About 7 days see rain.
Sea temperature near San Fernando in May
The nearest coast averages about 26°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 58 km away) is warmest in September at about 29°C and coldest in February near 20°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) | 21 | 20 | 21 | 23 | 26 | 28 | 28 | 29 | 29 | 28 | 25 | 22 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 21 | Refreshing |
| Feb | 20 | Refreshing |
| Mar | 21 | Refreshing |
| Apr | 23 | Refreshing |
| May | 26 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Warm |
| Nov | 25 | Warm |
| Dec | 22 | Refreshing |
UV index in San Fernando in May
Clear-sky midday UV in May 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 San Fernando peaks around April 17 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 5 (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) | 5 | 7 | 8 | 12 | 9 | 11 | 11 | 11 | 9 | 9 | 6 | 5 |
| Level | High | High | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | High |
| Feb | 7 | High |
| Mar | 8 | Very high |
| Apr | 12 | Extreme |
| May | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 9 | Very high |
| Nov | 6 | High |
| Dec | 5 | High |
Air quality in San Fernando in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in San Fernando is worst in August — around 34 µg/m³ PM2.5 (moderate), about 5.6× the cleanest month (January, 6 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) | 6 | 8 | 11 | 14 | 23 | 28 | 34 | 34 | 17 | 7 | 6 | 6 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 6 | Good |
| Feb | 8 | Good |
| Mar | 11 | Good |
| Apr | 14 | Moderate |
| May | 23 | Moderate |
| Jun | 28 | Moderate |
| Jul | 34 | Moderate |
| Aug | 34 | Moderate |
| Sep | 17 | Moderate |
| Oct | 7 | Good |
| Nov | 6 | Good |
| Dec | 6 | Good |
Where is San Fernando?
San Fernando sits at 24.8°N, 98.1°W, 44 m above sea level, in Mexico. The nearest listed city is Valle Hermoso, 98 km away.
Topography around San Fernando
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Fernando.
Within 3 km, the terrain around San Fernando has only modest variations in elevation — a maximum elevation change of 64 m around an average of 45 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 135 m; within 80 km, large variations in elevation — a maximum elevation change of 1,049 m.
The land around San Fernando is covered by trees (37%), artificial surfaces (29%) and shrubs (21%) within 3 km, cropland (35%), trees (30%) and shrubs (22%) within 16 km, and shrubs (30%) and cropland (21%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- 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 Fernando (24.8471°, -98.1488°, elevation 44 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).