Mayagüez weather in January
In January, Mayagüez sees average daytime highs of 27°C and overnight lows near 24°C, with 16 mm of rain across 4.9 wet days and about 11 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.
Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 75% of the time in January, and the air most often feels muggy.
Daylight stretches from about 10 h 54 min at the start of January to 11 h 12 min by month's end. Set against the rest of the year, January is Mayagüez's 1st-clearest and 2nd-windiest month. For the whole year in context, see Mayagüez's year-round climate.
- Daytime high
- 27°
- 10th warmest
- Overnight low
- 24°
- 3rd coldest
- Rainfall
- 16 mm
- 4.9 wet days
- Daylight
- 11 hours
- 7:07 AM – 6:08 PM
- Cloud cover
- 33%
- 1st clearest
- Wind
- 16 km/h
- 2nd windiest
- Solar energy
- 4.82 kWh/m²
- Travel score
- 7.8
- out of 10
Temperature in January
Day-to-day highs hold fairly steady near 27°C through the month.
A typical January day in Mayagüez reaches about 27°C in the afternoon and slips back to 24°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, January runs on par with December and on par with February.
| 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) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 24 |
| 2 | 27 | 24 |
| 3 | 27 | 24 |
| 4 | 27 | 24 |
| 5 | 27 | 24 |
| 6 | 27 | 24 |
| 7 | 27 | 24 |
| 8 | 27 | 24 |
| 9 | 27 | 24 |
| 10 | 27 | 24 |
| 11 | 27 | 24 |
| 12 | 27 | 24 |
| 13 | 27 | 24 |
| 14 | 27 | 24 |
| 15 | 27 | 24 |
| 16 | 27 | 24 |
| 17 | 27 | 24 |
| 18 | 27 | 24 |
| 19 | 26 | 24 |
| 20 | 26 | 24 |
| 21 | 26 | 24 |
| 22 | 26 | 24 |
| 23 | 26 | 24 |
| 24 | 26 | 24 |
| 25 | 26 | 24 |
| 26 | 26 | 24 |
| 27 | 26 | 24 |
| 28 | 26 | 24 |
| 29 | 26 | 24 |
| 30 | 26 | 24 |
| 31 | 26 | 24 |
How January really feels in Mayagüez
Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Mayagüez weather by month
How January compares with the rest of the year at a glance. January is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 24° | 16 | 4.9 | 11 | 7.8 |
| Feb | 26° / 24° | 19 | 6.3 | 11.4 | 7.6 |
| Mar | 26° / 24° | 28 | 9.1 | 11.9 | 7.2 |
| Apr | 27° / 24° | 36 | 10.5 | 12.4 | 6.7 |
| May | 28° / 25° | 70 | 14.8 | 12.8 | 5.7 |
| Jun | 29° / 26° | 47 | 13.2 | 13.1 | 5.1 |
| Jul | 29° / 26° | 51 | 14.4 | 13 | 5.0 |
| Aug | 29° / 27° | 67 | 16.8 | 12.6 | 4.6 |
| Sep | 29° / 26° | 98 | 17.4 | 12.1 | 4.6 |
| Oct | 28° / 26° | 71 | 15.6 | 11.6 | 5.1 |
| Nov | 28° / 25° | 55 | 10.3 | 11.1 | 6.4 |
| Dec | 27° / 25° | 18 | 4.6 | 10.9 | 7.7 |
Cloud cover in January
The sky is clear or mostly clear about 75% of the time in January, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 9%.
| 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 (%) | 91 | 91 | 91 | 91 | 91 | 92 | 91 | 91 | 91 | 91 | 91 | 91 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 92 |
| Cloudier (%) | 9 | 9 | 9 | 9 | 9 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 91 | 9 |
| 2 | 91 | 9 |
| 3 | 91 | 9 |
| 4 | 91 | 9 |
| 5 | 91 | 9 |
| 6 | 92 | 8 |
| 7 | 91 | 9 |
| 8 | 91 | 9 |
| 9 | 91 | 9 |
| 10 | 91 | 9 |
| 11 | 91 | 9 |
| 12 | 91 | 9 |
| 13 | 90 | 10 |
| 14 | 90 | 10 |
| 15 | 90 | 10 |
| 16 | 90 | 10 |
| 17 | 90 | 10 |
| 18 | 90 | 10 |
| 19 | 90 | 10 |
| 20 | 90 | 10 |
| 21 | 90 | 10 |
| 22 | 90 | 10 |
| 23 | 90 | 10 |
| 24 | 91 | 9 |
| 25 | 91 | 9 |
| 26 | 91 | 9 |
| 27 | 91 | 9 |
| 28 | 91 | 9 |
| 29 | 91 | 9 |
| 30 | 91 | 9 |
| 31 | 92 | 8 |
Chance of precipitation in January
Mayagüez gets around 16 mm of rain over 4.9 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 16% and peaks near 20% 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 (%) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 14 | 14 | 15 | 15 | 16 | 17 | 17 | 17 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 |
| Rain chance (%) | |
|---|---|
| 1 | 12 |
| 2 | 12 |
| 3 | 12 |
| 4 | 12 |
| 5 | 12 |
| 6 | 12 |
| 7 | 12 |
| 8 | 13 |
| 9 | 14 |
| 10 | 14 |
| 11 | 15 |
| 12 | 15 |
| 13 | 16 |
| 14 | 17 |
| 15 | 17 |
| 16 | 17 |
| 17 | 18 |
| 18 | 18 |
| 19 | 18 |
| 20 | 19 |
| 21 | 19 |
| 22 | 19 |
| 23 | 19 |
| 24 | 19 |
| 25 | 19 |
| 26 | 19 |
| 27 | 19 |
| 28 | 19 |
| 29 | 19 |
| 30 | 19 |
| 31 | 20 |
Humidity in January
Most of January feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, January lands in the muggy band about 71% of days. Sticky, muggy-or-worse air turns up on roughly 95% 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 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Humid (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 9 | 9 | 9 |
| Muggy (%) | 63 | 64 | 65 | 66 | 68 | 69 | 69 | 70 | 71 | 71 | 71 | 71 | 72 | 72 | 73 | 73 | 72 | 73 | 73 | 73 | 74 | 73 | 74 | 73 | 74 | 73 | 74 | 73 | 74 | 74 | 74 |
| Oppressive (%) | 34 | 33 | 32 | 31 | 29 | 28 | 28 | 27 | 26 | 26 | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 22 | 22 | 21 | 20 | 20 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 16 | 16 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 0 | 3 | 63 | 34 |
| 2 | 0 | 3 | 64 | 33 |
| 3 | 0 | 3 | 65 | 32 |
| 4 | 0 | 3 | 66 | 31 |
| 5 | 0 | 3 | 68 | 29 |
| 6 | 0 | 3 | 69 | 28 |
| 7 | 0 | 3 | 69 | 28 |
| 8 | 0 | 3 | 70 | 27 |
| 9 | 0 | 3 | 71 | 26 |
| 10 | 0 | 3 | 71 | 26 |
| 11 | 1 | 3 | 71 | 25 |
| 12 | 1 | 3 | 71 | 25 |
| 13 | 1 | 3 | 72 | 24 |
| 14 | 1 | 3 | 72 | 24 |
| 15 | 1 | 3 | 73 | 23 |
| 16 | 1 | 3 | 73 | 23 |
| 17 | 1 | 4 | 72 | 23 |
| 18 | 1 | 4 | 73 | 22 |
| 19 | 1 | 4 | 73 | 22 |
| 20 | 1 | 5 | 73 | 21 |
| 21 | 1 | 5 | 74 | 20 |
| 22 | 1 | 6 | 73 | 20 |
| 23 | 1 | 6 | 74 | 19 |
| 24 | 1 | 7 | 73 | 19 |
| 25 | 1 | 7 | 74 | 18 |
| 26 | 1 | 8 | 73 | 18 |
| 27 | 1 | 8 | 74 | 17 |
| 28 | 1 | 9 | 73 | 17 |
| 29 | 1 | 9 | 74 | 16 |
| 30 | 1 | 9 | 74 | 16 |
| 31 | 1 | 9 | 74 | 16 |
Wind in January
Winds average 16 km/h in January.
Across January, daily wind ranges from about 16 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) | 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 | 16 | 16 | 16 | 16 | 16 | 16 |
| 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 | 17 | light breeze |
| 2 | 17 | light breeze |
| 3 | 17 | light breeze |
| 4 | 16 | light breeze |
| 5 | 16 | light breeze |
| 6 | 16 | light breeze |
| 7 | 16 | light breeze |
| 8 | 16 | 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 | 16 | light breeze |
Sunrise & sunset in January
Daylight runs from about 10 h 54 min at the start of January to 11 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 18 minutes over January. Sunrise moves from 7:04 AM to 7:07 AM, and sunset from 5:59 PM to 6:17 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) | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11.2 | 11.2 | 11.2 |
| Sunrise (AM) | 7:04 | 7:04 | 7:05 | 7:05 | 7:05 | 7:05 | 7:06 | 7:06 | 7:06 | 7:06 | 7:07 | 7:07 | 7:07 | 7:07 | 7:07 | 7:07 | 7:07 | 7:07 | 7:08 | 7:08 | 7:08 | 7:08 | 7:08 | 7:07 | 7:07 | 7:07 | 7:07 | 7:07 | 7:07 | 7:07 | 7:07 |
| Sunset (PM) | 5:59 | 6:00 | 6:01 | 6:01 | 6:02 | 6:02 | 6:03 | 6:04 | 6:04 | 6:05 | 6:05 | 6:06 | 6:07 | 6:07 | 6:08 | 6:08 | 6:09 | 6:10 | 6:10 | 6:11 | 6:11 | 6:12 | 6:13 | 6:13 | 6:14 | 6:14 | 6:15 | 6:16 | 6:16 | 6:17 | 6:17 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.9 | 7:04 | 5:59 |
| 2 | 10.9 | 7:04 | 6:00 |
| 3 | 10.9 | 7:05 | 6:01 |
| 4 | 10.9 | 7:05 | 6:01 |
| 5 | 10.9 | 7:05 | 6:02 |
| 6 | 10.9 | 7:05 | 6:02 |
| 7 | 11.0 | 7:06 | 6:03 |
| 8 | 11.0 | 7:06 | 6:04 |
| 9 | 11.0 | 7:06 | 6:04 |
| 10 | 11.0 | 7:06 | 6:05 |
| 11 | 11.0 | 7:07 | 6:05 |
| 12 | 11.0 | 7:07 | 6:06 |
| 13 | 11.0 | 7:07 | 6:07 |
| 14 | 11.0 | 7:07 | 6:07 |
| 15 | 11.0 | 7:07 | 6:08 |
| 16 | 11.0 | 7:07 | 6:08 |
| 17 | 11.0 | 7:07 | 6:09 |
| 18 | 11.0 | 7:07 | 6:10 |
| 19 | 11.0 | 7:08 | 6:10 |
| 20 | 11.1 | 7:08 | 6:11 |
| 21 | 11.1 | 7:08 | 6:11 |
| 22 | 11.1 | 7:08 | 6:12 |
| 23 | 11.1 | 7:08 | 6:13 |
| 24 | 11.1 | 7:07 | 6:13 |
| 25 | 11.1 | 7:07 | 6:14 |
| 26 | 11.1 | 7:07 | 6:14 |
| 27 | 11.1 | 7:07 | 6:15 |
| 28 | 11.1 | 7:07 | 6:16 |
| 29 | 11.2 | 7:07 | 6:16 |
| 30 | 11.2 | 7:07 | 6:17 |
| 31 | 11.2 | 7:07 | 6:17 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 4.82 kWh/m².
For context, solar energy here swings from a low near 4.57 kWh/m² to a high of 6.69 kWh/m² in April across the year — January's 4.82 kWh/m² sits near the bottom.
| 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) | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.6 | Bright |
| 2 | 4.6 | Bright |
| 3 | 4.6 | Bright |
| 4 | 4.6 | Bright |
| 5 | 4.7 | Bright |
| 6 | 4.7 | Bright |
| 7 | 4.7 | Bright |
| 8 | 4.7 | Bright |
| 9 | 4.7 | Bright |
| 10 | 4.7 | Bright |
| 11 | 4.7 | Bright |
| 12 | 4.7 | Bright |
| 13 | 4.8 | Bright |
| 14 | 4.8 | Bright |
| 15 | 4.8 | Bright |
| 16 | 4.8 | Bright |
| 17 | 4.8 | Bright |
| 18 | 4.8 | Bright |
| 19 | 4.9 | Bright |
| 20 | 4.9 | Bright |
| 21 | 4.9 | Bright |
| 22 | 4.9 | Bright |
| 23 | 4.9 | Bright |
| 24 | 5.0 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.0 | Bright |
| 27 | 5.0 | Bright |
| 28 | 5.0 | Bright |
| 29 | 5.1 | Bright |
| 30 | 5.1 | Bright |
| 31 | 5.1 | Bright |
Hazard calendar for Mayagüez
None of Mayagüez's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Mayagüez sits in the Atlantic hurricane belt; the season peaks August–October.
Mayagüez's rainy season runs May–November, when most of the year's rain falls.
Mayagüez sees seasonal dust haze (July), heaviest in July.
Is January a good time to visit Mayagüez?
Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
January is one of the better times to visit Mayagüez for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Mayagüez in January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, Mayagüez sees daytime highs around 27°C and nights near 24°C. Worth packing: light clothes and sun protection. About 5 days see rain.
Sea temperature near Mayagüez in January
The nearest coast averages about 27°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 29°C and coldest in February near 27°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) | 27 | 27 | 27 | 27 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 27 | Warm |
| May | 28 | Warm |
| Jun | 28 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Mayagüez in January
Clear-sky midday UV in January peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mayagüez peaks around April 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (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) | 8 | 10 | 12 | 13 | 11 | 12 | 11 | 12 | 12 | 10 | 8 | 7 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Extreme |
| Mar | 12 | Extreme |
| Apr | 13 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Mayagüez in January
Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.
Air quality in Mayagüez is worst in July — around 25 µg/m³ PM2.5 (moderate), about 5.2× the cleanest month (January, 5 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) | 5 | 7 | 7 | 8 | 15 | 25 | 25 | 21 | 15 | 15 | 8 | 5 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 5 | Good |
| Feb | 7 | Good |
| Mar | 7 | Good |
| Apr | 8 | Good |
| May | 15 | Moderate |
| Jun | 25 | Moderate |
| Jul | 25 | Moderate |
| Aug | 21 | Moderate |
| Sep | 15 | Moderate |
| Oct | 15 | Moderate |
| Nov | 8 | Good |
| Dec | 5 | Good |
Where is Mayagüez?
Mayagüez sits at 18.2°N, 67.1°W, 21 m above sea level, in Puerto Rico. The nearest listed city is San Germán, 17 km away.
Topography around Mayagüez
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mayagüez.
Within 3 km, the terrain around Mayagüez has significant variations in elevation — a maximum elevation change of 265 m around an average of 42 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 766 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,307 m.
The land around Mayagüez is covered by trees (51%) and artificial surfaces (30%) within 3 km, trees (55%) and water (31%) within 16 km, and water (71%) and trees (23%) within 80 km.
Puerto Rico travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 78% of US
- price level, 2025
- GDP per capita
- $40,620
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2015
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 14.6
- per 100k, 2023
- Income group
- High
- World Bank
- 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 Mayagüez (18.2011°, -67.1396°, elevation 21 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).