Heroica Matamoros weather in May
In May, Heroica Matamoros sees average daytime highs of 31°C and overnight lows near 23°C, with 45 mm of rain across 7 wet days and about 13.2 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.
Highs climb over the month, from about 30°C in the first days to 32°C by the end. The sky is clear or mostly clear about 43% of the time in May, and the air most often feels oppressive.
Daylight stretches from about 13 hours at the start of May to 13 h 30 min by month's end. Set against the rest of the year, May is Heroica Matamoros's 5th-clearest and 2nd-windiest month. For the whole year in context, see Heroica Matamoros's year-round climate.
- Daytime high
- 31°
- 5th warmest
- Overnight low
- 23°
- 8th coldest
- Rainfall
- 45 mm
- 7 wet days
- Daylight
- 13 h 18 min
- 5:48 AM – 7:04 PM
- Cloud cover
- 48%
- 5th clearest
- Wind
- 20 km/h
- 2nd windiest
- Solar energy
- 6.31 kWh/m²
- Travel score
- 5.0
- out of 10
Heroica Matamoros is municipal seat of Matamoros, State of Tamaulipas, Mexico.
- Founded
- 1774
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Highs climb over the month, from about 30°C in the first days to 32°C by the end.
A typical May day in Heroica Matamoros reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, May runs about 3°C warmer than April and about 2°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) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 22 |
| 2 | 30 | 22 |
| 3 | 30 | 22 |
| 4 | 30 | 22 |
| 5 | 30 | 22 |
| 6 | 30 | 22 |
| 7 | 30 | 23 |
| 8 | 30 | 23 |
| 9 | 30 | 23 |
| 10 | 30 | 23 |
| 11 | 30 | 23 |
| 12 | 30 | 23 |
| 13 | 31 | 23 |
| 14 | 31 | 23 |
| 15 | 31 | 23 |
| 16 | 31 | 23 |
| 17 | 31 | 23 |
| 18 | 31 | 23 |
| 19 | 31 | 24 |
| 20 | 31 | 24 |
| 21 | 31 | 24 |
| 22 | 31 | 24 |
| 23 | 31 | 24 |
| 24 | 31 | 24 |
| 25 | 32 | 24 |
| 26 | 32 | 24 |
| 27 | 32 | 24 |
| 28 | 32 | 24 |
| 29 | 32 | 24 |
| 30 | 32 | 24 |
| 31 | 32 | 25 |
How May really feels in Heroica Matamoros
Once humidity and wind are folded in, May averages 28 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.
Heroica Matamoros weather by month
How May compares with the rest of the year at a glance. May is the 5th-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 | 21° / 13° | 32 | 5.7 | 10.6 | 7.1 |
| Feb | 23° / 14° | 27 | 5.3 | 11.1 | 7.5 |
| Mar | 26° / 17° | 38 | 5.7 | 11.8 | 7.4 |
| Apr | 28° / 20° | 47 | 5.9 | 12.6 | 6.5 |
| May | 31° / 23° | 45 | 7 | 13.2 | 5.0 |
| Jun | 33° / 25° | 58 | 10.3 | 13.6 | 3.8 |
| Jul | 33° / 26° | 64 | 8.8 | 13.5 | 3.5 |
| Aug | 34° / 26° | 52 | 10.4 | 12.9 | 3.2 |
| Sep | 32° / 24° | 108 | 15.6 | 12.2 | 3.7 |
| Oct | 29° / 21° | 72 | 9.4 | 11.4 | 5.8 |
| Nov | 25° / 17° | 43 | 7.6 | 10.7 | 7.2 |
| Dec | 22° / 13° | 34 | 5.9 | 10.4 | 7.3 |
Cloud cover in May
The sky is clear or mostly clear about 43% 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 35%. 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 (%) | 57 | 57 | 58 | 58 | 57 | 57 | 58 | 59 | 59 | 60 | 60 | 62 | 63 | 64 | 64 | 66 | 67 | 68 | 68 | 69 | 69 | 70 | 70 | 71 | 72 | 72 | 73 | 73 | 74 | 74 | 75 |
| Cloudier (%) | 43 | 43 | 42 | 42 | 43 | 43 | 42 | 41 | 41 | 40 | 40 | 38 | 37 | 36 | 36 | 34 | 33 | 32 | 32 | 31 | 31 | 30 | 30 | 29 | 28 | 28 | 27 | 27 | 26 | 26 | 25 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 57 | 43 |
| 2 | 57 | 43 |
| 3 | 58 | 42 |
| 4 | 58 | 42 |
| 5 | 57 | 43 |
| 6 | 57 | 43 |
| 7 | 58 | 42 |
| 8 | 59 | 41 |
| 9 | 59 | 41 |
| 10 | 60 | 40 |
| 11 | 60 | 40 |
| 12 | 62 | 38 |
| 13 | 63 | 37 |
| 14 | 64 | 36 |
| 15 | 64 | 36 |
| 16 | 66 | 34 |
| 17 | 67 | 33 |
| 18 | 68 | 32 |
| 19 | 68 | 32 |
| 20 | 69 | 31 |
| 21 | 69 | 31 |
| 22 | 70 | 30 |
| 23 | 70 | 30 |
| 24 | 71 | 29 |
| 25 | 72 | 28 |
| 26 | 72 | 28 |
| 27 | 73 | 27 |
| 28 | 73 | 27 |
| 29 | 74 | 26 |
| 30 | 74 | 26 |
| 31 | 75 | 25 |
Chance of precipitation in May
Heroica Matamoros gets around 45 mm of rain over 7 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 23% 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 (%) | 17 | 17 | 17 | 17 | 18 | 19 | 19 | 20 | 20 | 21 | 22 | 22 | 23 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 |
| Rain chance (%) | |
|---|---|
| 1 | 17 |
| 2 | 17 |
| 3 | 17 |
| 4 | 17 |
| 5 | 18 |
| 6 | 19 |
| 7 | 19 |
| 8 | 20 |
| 9 | 20 |
| 10 | 21 |
| 11 | 22 |
| 12 | 22 |
| 13 | 23 |
| 14 | 24 |
| 15 | 24 |
| 16 | 25 |
| 17 | 25 |
| 18 | 25 |
| 19 | 25 |
| 20 | 25 |
| 21 | 25 |
| 22 | 25 |
| 23 | 25 |
| 24 | 25 |
| 25 | 25 |
| 26 | 25 |
| 27 | 25 |
| 28 | 26 |
| 29 | 26 |
| 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 60% of days. Sticky, muggy-or-worse air turns up on roughly 90% 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 (%) | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Humid (%) | 12 | 12 | 11 | 11 | 10 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 0 |
| Muggy (%) | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 |
| Oppressive (%) | 53 | 55 | 55 | 56 | 59 | 59 | 59 | 60 | 60 | 60 | 61 | 60 | 60 | 60 | 59 | 58 | 58 | 58 | 58 | 59 | 60 | 59 | 60 | 60 | 61 | 61 | 62 | 64 | 64 | 64 | 65 |
| Miserable (%) | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 20 | 21 | 22 | 23 | 24 | 24 | 25 | 26 | 27 | 28 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 6 | 5 | 12 | 20 | 53 | 4 |
| 2 | 5 | 5 | 12 | 19 | 55 | 4 |
| 3 | 5 | 5 | 11 | 19 | 55 | 5 |
| 4 | 5 | 4 | 11 | 19 | 56 | 5 |
| 5 | 4 | 4 | 10 | 18 | 59 | 5 |
| 6 | 4 | 4 | 9 | 18 | 59 | 6 |
| 7 | 4 | 4 | 9 | 18 | 59 | 6 |
| 8 | 3 | 3 | 8 | 19 | 60 | 7 |
| 9 | 3 | 3 | 8 | 19 | 60 | 7 |
| 10 | 2 | 3 | 8 | 19 | 60 | 8 |
| 11 | 2 | 3 | 7 | 19 | 61 | 8 |
| 12 | 2 | 2 | 7 | 20 | 60 | 9 |
| 13 | 1 | 2 | 7 | 20 | 60 | 10 |
| 14 | 1 | 2 | 6 | 20 | 60 | 11 |
| 15 | 1 | 2 | 6 | 20 | 59 | 12 |
| 16 | 1 | 2 | 6 | 20 | 58 | 13 |
| 17 | 1 | 2 | 5 | 20 | 58 | 14 |
| 18 | 1 | 2 | 5 | 19 | 58 | 15 |
| 19 | 1 | 1 | 5 | 19 | 58 | 16 |
| 20 | 1 | 1 | 4 | 18 | 59 | 17 |
| 21 | 0 | 1 | 4 | 17 | 60 | 18 |
| 22 | 0 | 1 | 4 | 16 | 59 | 20 |
| 23 | 0 | 1 | 3 | 15 | 60 | 21 |
| 24 | 0 | 1 | 3 | 14 | 60 | 22 |
| 25 | 0 | 1 | 2 | 13 | 61 | 23 |
| 26 | 0 | 1 | 2 | 12 | 61 | 24 |
| 27 | 0 | 1 | 2 | 11 | 62 | 24 |
| 28 | 0 | 0 | 1 | 10 | 64 | 25 |
| 29 | 0 | 0 | 1 | 9 | 64 | 26 |
| 30 | 0 | 0 | 1 | 8 | 64 | 27 |
| 31 | 0 | 0 | 0 | 7 | 65 | 28 |
Wind in May
Winds average 20 km/h in May.
Across May, daily wind ranges from about 19 km/h on the calmest days to 21 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) | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | 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 | 21 | breezy |
| 2 | 21 | breezy |
| 3 | 21 | breezy |
| 4 | 21 | breezy |
| 5 | 21 | breezy |
| 6 | 21 | breezy |
| 7 | 21 | breezy |
| 8 | 21 | breezy |
| 9 | 21 | breezy |
| 10 | 20 | breezy |
| 11 | 20 | breezy |
| 12 | 20 | breezy |
| 13 | 20 | breezy |
| 14 | 20 | breezy |
| 15 | 20 | breezy |
| 16 | 20 | breezy |
| 17 | 20 | breezy |
| 18 | 20 | light breeze |
| 19 | 20 | light breeze |
| 20 | 20 | light breeze |
| 21 | 20 | light breeze |
| 22 | 20 | light breeze |
| 23 | 20 | light breeze |
| 24 | 20 | light breeze |
| 25 | 20 | light breeze |
| 26 | 19 | light breeze |
| 27 | 19 | light breeze |
| 28 | 19 | light breeze |
| 29 | 19 | light breeze |
| 30 | 19 | light breeze |
| 31 | 19 | light breeze |
Sunrise & sunset in May
Daylight runs from about 13 hours at the start of May to 13 h 30 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 5:58 AM to 5:43 AM, and sunset from 6:56 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) | 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 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.5 | 13.5 | 13.5 |
| Sunrise (AM) | 5:58 | 5:58 | 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 | 5:48 | 5:47 | 5:47 | 5:46 | 5:46 | 5:46 | 5:45 | 5:45 | 5:45 | 5:44 | 5:44 | 5:44 | 5:43 | 5:43 | 5:43 |
| Sunset (PM) | 6:56 | 6:57 | 6:57 | 6:58 | 6:58 | 6:59 | 6:59 | 7:00 | 7:00 | 7:01 | 7:01 | 7:02 | 7:02 | 7:03 | 7:04 | 7:04 | 7:05 | 7:05 | 7:06 | 7:06 | 7:07 | 7:07 | 7:08 | 7:08 | 7:09 | 7:09 | 7:10 | 7:10 | 7:11 | 7:11 | 7:12 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.0 | 5:58 | 6:56 |
| 2 | 13.0 | 5:58 | 6:57 |
| 3 | 13.0 | 5:57 | 6:57 |
| 4 | 13.0 | 5:56 | 6:58 |
| 5 | 13.0 | 5:55 | 6:58 |
| 6 | 13.1 | 5:55 | 6:59 |
| 7 | 13.1 | 5:54 | 6:59 |
| 8 | 13.1 | 5:53 | 7:00 |
| 9 | 13.1 | 5:53 | 7:00 |
| 10 | 13.1 | 5:52 | 7:01 |
| 11 | 13.2 | 5:51 | 7:01 |
| 12 | 13.2 | 5:51 | 7:02 |
| 13 | 13.2 | 5:50 | 7:02 |
| 14 | 13.2 | 5:49 | 7:03 |
| 15 | 13.2 | 5:49 | 7:04 |
| 16 | 13.3 | 5:48 | 7:04 |
| 17 | 13.3 | 5:48 | 7:05 |
| 18 | 13.3 | 5:47 | 7:05 |
| 19 | 13.3 | 5:47 | 7:06 |
| 20 | 13.3 | 5:46 | 7:06 |
| 21 | 13.3 | 5:46 | 7:07 |
| 22 | 13.4 | 5:46 | 7:07 |
| 23 | 13.4 | 5:45 | 7:08 |
| 24 | 13.4 | 5:45 | 7:08 |
| 25 | 13.4 | 5:45 | 7:09 |
| 26 | 13.4 | 5:44 | 7:09 |
| 27 | 13.4 | 5:44 | 7:10 |
| 28 | 13.4 | 5:44 | 7:10 |
| 29 | 13.5 | 5:43 | 7:11 |
| 30 | 13.5 | 5:43 | 7:11 |
| 31 | 13.5 | 5:43 | 7:12 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 6.31 kWh/m².
For context, solar energy here swings from a low near 2.92 kWh/m² to a high of 6.72 kWh/m² in July across the year — May'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) | 6.1 | 6.1 | 6.1 | 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 | 6.3 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 |
| 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 | 6.1 | Intense |
| 2 | 6.1 | Intense |
| 3 | 6.1 | 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 | 6.3 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.3 | Intense |
| 16 | 6.3 | Intense |
| 17 | 6.3 | Intense |
| 18 | 6.3 | Intense |
| 19 | 6.4 | Intense |
| 20 | 6.4 | Intense |
| 21 | 6.4 | Intense |
| 22 | 6.4 | Intense |
| 23 | 6.4 | Intense |
| 24 | 6.4 | Intense |
| 25 | 6.5 | Intense |
| 26 | 6.5 | Intense |
| 27 | 6.5 | Intense |
| 28 | 6.5 | Intense |
| 29 | 6.5 | Intense |
| 30 | 6.5 | Intense |
| 31 | 6.5 | Intense |
Hazard calendar for Heroica Matamoros
None of Heroica Matamoros's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Heroica Matamoros sits in the Atlantic hurricane belt; the season peaks August–October.
Is May a good time to visit Heroica Matamoros?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a reasonable time to visit Heroica Matamoros for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Heroica Matamoros in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Heroica Matamoros sees daytime highs around 31°C and nights near 23°C. Pack light clothes and sun protection. Worth having: a windbreaker. About 7 days see rain.
Sea temperature near Heroica Matamoros in May
The nearest coast averages about 25°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 38 km away) is warmest in September at about 29°C and coldest in February near 19°C.
It's comfortable for a long swim from Mar 18 to Jan 2 — about 9.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 19 | 19 | 20 | 22 | 25 | 28 | 28 | 29 | 29 | 27 | 24 | 21 |
| Comfort | Cool | Cool | Cool | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 19 | Cool |
| Feb | 19 | Cool |
| Mar | 20 | Cool |
| Apr | 22 | Refreshing |
| May | 25 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 27 | Warm |
| Nov | 24 | Warm |
| Dec | 21 | Refreshing |
UV index in Heroica Matamoros 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 Heroica Matamoros peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (moderate).
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 | 11 | 9 | 12 | 11 | 11 | 10 | 8 | 6 | 5 |
| Level | Moderate | High | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 7 | High |
| Mar | 8 | Very high |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 8 | Very high |
| Nov | 6 | High |
| Dec | 5 | Moderate |
Air quality in Heroica Matamoros 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 Heroica Matamoros is worst in July — around 25 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (October, 7 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) | 8 | 9 | 11 | 13 | 19 | 20 | 25 | 18 | 13 | 7 | 7 | 9 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 9 | Good |
| Mar | 11 | Good |
| Apr | 13 | Moderate |
| May | 19 | Moderate |
| Jun | 20 | Moderate |
| Jul | 25 | Moderate |
| Aug | 18 | Moderate |
| Sep | 13 | Moderate |
| Oct | 7 | Good |
| Nov | 7 | Good |
| Dec | 9 | Good |
Where is Heroica Matamoros?
Heroica Matamoros sits at 25.9°N, 97.5°W, 16 m above sea level, in Mexico. The nearest listed city is Brownsville, 3.0 km away.
Topography around Heroica Matamoros
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Heroica Matamoros.
Within 3 km, the terrain around Heroica Matamoros has only modest variations in elevation — a maximum elevation change of 13 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 28 m; within 80 km, only modest variations in elevation — a maximum elevation change of 81 m.
The land around Heroica Matamoros is covered by artificial surfaces (66%) and trees (20%) within 3 km, cropland (32%), grassland (21%) and artificial surfaces (20%) within 16 km, and cropland (38%) and water (34%) 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 Heroica Matamoros (25.8797°, -97.5042°, elevation 16 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).