Guaynabo weather in April
In April, Guaynabo sees average daytime highs of 28°C and overnight lows near 22°C, with 87 mm of rain across 17.7 wet days and about 12.4 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 27% of the time in April, and the air most often feels oppressive.
Daylight stretches from about 12 h 12 min at the start of April to 12 h 36 min by month's end. Set against the rest of the year, April is Guaynabo's 5th-clearest and 8th-windiest month. For the whole year in context, see Guaynabo's year-round climate.
- Daytime high
- 28°
- 8th warmest
- Overnight low
- 22°
- 5th coldest
- Rainfall
- 87 mm
- 17.7 wet days
- Daylight
- 12 h 24 min
- 6:12 AM – 6:37 PM
- Cloud cover
- 54%
- 5th clearest
- Wind
- 10 km/h
- 8th windiest
- Solar energy
- 6.52 kWh/m²
- Travel score
- 5.3
- out of 10
Temperature in April
Day-to-day highs hold fairly steady near 28°C through the month.
A typical April day in Guaynabo reaches about 28°C in the afternoon and slips back to 22°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, April runs on par with March and on par with 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) | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 22 |
| 2 | 27 | 22 |
| 3 | 27 | 22 |
| 4 | 28 | 22 |
| 5 | 28 | 22 |
| 6 | 28 | 22 |
| 7 | 28 | 22 |
| 8 | 28 | 22 |
| 9 | 28 | 22 |
| 10 | 28 | 22 |
| 11 | 28 | 22 |
| 12 | 28 | 22 |
| 13 | 28 | 22 |
| 14 | 28 | 22 |
| 15 | 28 | 22 |
| 16 | 28 | 22 |
| 17 | 28 | 22 |
| 18 | 28 | 22 |
| 19 | 28 | 22 |
| 20 | 28 | 22 |
| 21 | 28 | 22 |
| 22 | 28 | 23 |
| 23 | 28 | 23 |
| 24 | 28 | 23 |
| 25 | 28 | 23 |
| 26 | 28 | 23 |
| 27 | 28 | 23 |
| 28 | 28 | 23 |
| 29 | 28 | 23 |
| 30 | 28 | 23 |
How April really feels in Guaynabo
Once humidity and wind are folded in, April 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.
April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Guaynabo weather by month
How April compares with the rest of the year at a glance. April is the 8th-warmest and 8th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 22° | 49 | 15.7 | 11 | 6.0 |
| Feb | 27° / 21° | 39 | 13 | 11.4 | 6.2 |
| Mar | 27° / 22° | 55 | 14.8 | 11.9 | 6.0 |
| Apr | 28° / 22° | 87 | 17.7 | 12.4 | 5.3 |
| May | 28° / 23° | 142 | 21.9 | 12.9 | 4.2 |
| Jun | 29° / 24° | 99 | 20.8 | 13.1 | 4.0 |
| Jul | 29° / 24° | 110 | 21.8 | 13 | 3.9 |
| Aug | 30° / 25° | 127 | 24 | 12.6 | 3.6 |
| Sep | 29° / 24° | 168 | 25.2 | 12.1 | 3.4 |
| Oct | 29° / 24° | 156 | 24.9 | 11.6 | 3.6 |
| Nov | 28° / 23° | 124 | 22.3 | 11.1 | 4.5 |
| Dec | 27° / 22° | 59 | 16.5 | 10.9 | 5.8 |
Cloud cover in April
The sky is clear or mostly clear about 27% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 37% of April, with mostly cloudy or overcast conditions the remaining 36%.
| 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 (%) | 69 | 69 | 69 | 69 | 69 | 69 | 68 | 68 | 68 | 68 | 67 | 67 | 66 | 65 | 65 | 64 | 63 | 63 | 62 | 62 | 61 | 61 | 61 | 60 | 60 | 59 | 58 | 57 | 56 | 54 |
| Cloudier (%) | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 33 | 33 | 34 | 35 | 35 | 36 | 37 | 37 | 38 | 38 | 39 | 39 | 39 | 40 | 40 | 41 | 42 | 43 | 44 | 46 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 69 | 31 |
| 2 | 69 | 31 |
| 3 | 69 | 31 |
| 4 | 69 | 31 |
| 5 | 69 | 31 |
| 6 | 69 | 31 |
| 7 | 68 | 32 |
| 8 | 68 | 32 |
| 9 | 68 | 32 |
| 10 | 68 | 32 |
| 11 | 67 | 33 |
| 12 | 67 | 33 |
| 13 | 66 | 34 |
| 14 | 65 | 35 |
| 15 | 65 | 35 |
| 16 | 64 | 36 |
| 17 | 63 | 37 |
| 18 | 63 | 37 |
| 19 | 62 | 38 |
| 20 | 62 | 38 |
| 21 | 61 | 39 |
| 22 | 61 | 39 |
| 23 | 61 | 39 |
| 24 | 60 | 40 |
| 25 | 60 | 40 |
| 26 | 59 | 41 |
| 27 | 58 | 42 |
| 28 | 57 | 43 |
| 29 | 56 | 44 |
| 30 | 54 | 46 |
Chance of precipitation in April
Guaynabo gets around 87 mm of rain over 17.7 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 59% and peaks near 65% 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 (%) | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 58 | 58 | 58 | 58 | 58 | 59 | 59 | 59 | 60 | 60 | 60 | 61 | 61 | 62 | 62 | 63 | 63 | 64 | 64 | 65 |
| Rain chance (%) | |
|---|---|
| 1 | 57 |
| 2 | 57 |
| 3 | 57 |
| 4 | 57 |
| 5 | 57 |
| 6 | 57 |
| 7 | 57 |
| 8 | 57 |
| 9 | 57 |
| 10 | 57 |
| 11 | 58 |
| 12 | 58 |
| 13 | 58 |
| 14 | 58 |
| 15 | 58 |
| 16 | 59 |
| 17 | 59 |
| 18 | 59 |
| 19 | 60 |
| 20 | 60 |
| 21 | 60 |
| 22 | 61 |
| 23 | 61 |
| 24 | 62 |
| 25 | 62 |
| 26 | 63 |
| 27 | 63 |
| 28 | 64 |
| 29 | 64 |
| 30 | 65 |
Humidity in April
Most of April feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the oppressive band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 96% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
| Muggy (%) | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 50 | 49 | 49 | 48 | 47 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 37 | 36 | 34 | 33 | 31 | 30 | 28 | 27 | 26 |
| Oppressive (%) | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 44 | 45 | 46 | 47 | 48 | 49 | 49 | 51 | 52 | 54 | 55 | 55 | 57 | 59 | 60 | 62 | 64 | 66 | 67 | 69 | 70 | 71 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 7 | 56 | 37 | 0 |
| 2 | 7 | 55 | 38 | 0 |
| 3 | 7 | 54 | 39 | 0 |
| 4 | 7 | 53 | 40 | 0 |
| 5 | 7 | 52 | 41 | 0 |
| 6 | 7 | 51 | 42 | 0 |
| 7 | 7 | 50 | 43 | 0 |
| 8 | 6 | 50 | 44 | 0 |
| 9 | 6 | 49 | 44 | 0 |
| 10 | 6 | 49 | 45 | 0 |
| 11 | 6 | 48 | 46 | 0 |
| 12 | 6 | 47 | 47 | 0 |
| 13 | 5 | 47 | 48 | 0 |
| 14 | 5 | 46 | 49 | 1 |
| 15 | 5 | 45 | 49 | 1 |
| 16 | 4 | 44 | 51 | 1 |
| 17 | 4 | 43 | 52 | 1 |
| 18 | 3 | 42 | 54 | 1 |
| 19 | 3 | 41 | 55 | 1 |
| 20 | 3 | 40 | 55 | 2 |
| 21 | 2 | 39 | 57 | 2 |
| 22 | 2 | 37 | 59 | 2 |
| 23 | 2 | 36 | 60 | 2 |
| 24 | 2 | 34 | 62 | 2 |
| 25 | 1 | 33 | 64 | 2 |
| 26 | 1 | 31 | 66 | 2 |
| 27 | 1 | 30 | 67 | 2 |
| 28 | 1 | 28 | 69 | 2 |
| 29 | 1 | 27 | 70 | 2 |
| 30 | 1 | 26 | 71 | 2 |
Wind in April
Winds average 10 km/h in April.
Across April, daily wind ranges from about 10 km/h on the calmest days to 11 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) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| 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 | 10 | calm |
| 2 | 10 | calm |
| 3 | 10 | calm |
| 4 | 10 | calm |
| 5 | 10 | calm |
| 6 | 10 | calm |
| 7 | 10 | calm |
| 8 | 10 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | calm |
| 20 | 10 | calm |
| 21 | 10 | calm |
| 22 | 10 | calm |
| 23 | 11 | calm |
| 24 | 11 | calm |
| 25 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
Sunrise & sunset in April
Daylight runs from about 12 h 12 min at the start of April to 12 h 36 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 6:24 AM to 6:03 AM, and sunset from 6:34 PM to 6:41 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) | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 |
| Sunrise (AM) | 6:24 | 6:24 | 6:23 | 6:22 | 6:21 | 6:20 | 6:19 | 6:19 | 6:18 | 6:17 | 6:16 | 6:15 | 6:15 | 6:14 | 6:13 | 6:12 | 6:11 | 6:11 | 6:10 | 6:09 | 6:08 | 6:08 | 6:07 | 6:06 | 6:06 | 6:05 | 6:04 | 6:04 | 6:03 | 6:03 |
| Sunset (PM) | 6:34 | 6:34 | 6:34 | 6:34 | 6:35 | 6:35 | 6:35 | 6:35 | 6:36 | 6:36 | 6:36 | 6:36 | 6:36 | 6:37 | 6:37 | 6:37 | 6:37 | 6:38 | 6:38 | 6:38 | 6:38 | 6:39 | 6:39 | 6:39 | 6:40 | 6:40 | 6:40 | 6:40 | 6:41 | 6:41 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.2 | 6:24 | 6:34 |
| 2 | 12.2 | 6:24 | 6:34 |
| 3 | 12.2 | 6:23 | 6:34 |
| 4 | 12.2 | 6:22 | 6:34 |
| 5 | 12.2 | 6:21 | 6:35 |
| 6 | 12.2 | 6:20 | 6:35 |
| 7 | 12.3 | 6:19 | 6:35 |
| 8 | 12.3 | 6:19 | 6:35 |
| 9 | 12.3 | 6:18 | 6:36 |
| 10 | 12.3 | 6:17 | 6:36 |
| 11 | 12.3 | 6:16 | 6:36 |
| 12 | 12.3 | 6:15 | 6:36 |
| 13 | 12.4 | 6:15 | 6:36 |
| 14 | 12.4 | 6:14 | 6:37 |
| 15 | 12.4 | 6:13 | 6:37 |
| 16 | 12.4 | 6:12 | 6:37 |
| 17 | 12.4 | 6:11 | 6:37 |
| 18 | 12.4 | 6:11 | 6:38 |
| 19 | 12.5 | 6:10 | 6:38 |
| 20 | 12.5 | 6:09 | 6:38 |
| 21 | 12.5 | 6:08 | 6:38 |
| 22 | 12.5 | 6:08 | 6:39 |
| 23 | 12.5 | 6:07 | 6:39 |
| 24 | 12.5 | 6:06 | 6:39 |
| 25 | 12.6 | 6:06 | 6:40 |
| 26 | 12.6 | 6:05 | 6:40 |
| 27 | 12.6 | 6:04 | 6:40 |
| 28 | 12.6 | 6:04 | 6:40 |
| 29 | 12.6 | 6:03 | 6:41 |
| 30 | 12.6 | 6:03 | 6:41 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 6.52 kWh/m².
For context, solar energy here swings from a low near 4.39 kWh/m² to a high of 6.55 kWh/m² in June across the year — April's 6.52 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) | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 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 |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.4 | Intense |
| 2 | 6.4 | Intense |
| 3 | 6.4 | Intense |
| 4 | 6.5 | Intense |
| 5 | 6.5 | Intense |
| 6 | 6.5 | Intense |
| 7 | 6.5 | Intense |
| 8 | 6.5 | Intense |
| 9 | 6.5 | Intense |
| 10 | 6.5 | Intense |
| 11 | 6.5 | Intense |
| 12 | 6.5 | Intense |
| 13 | 6.5 | Intense |
| 14 | 6.5 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.5 | Intense |
| 18 | 6.5 | Intense |
| 19 | 6.5 | Intense |
| 20 | 6.5 | Intense |
| 21 | 6.5 | 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 | 6.5 | Intense |
| 29 | 6.5 | Intense |
| 30 | 6.5 | Intense |
Hazard calendar for Guaynabo
None of Guaynabo's seasonal hazards are active in April. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Guaynabo sits in the Atlantic hurricane belt; the season peaks August–October.
Guaynabo sees seasonal dust haze (July), heaviest in July.
Is April a good time to visit Guaynabo?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a reasonable time to visit Guaynabo for sightseeing.
What to pack for Guaynabo in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Guaynabo sees daytime highs around 28°C and nights near 22°C. Pack light clothes, rain gear and sun protection. About 18 days see rain.
Sea temperature near Guaynabo in April
The nearest coast averages about 27°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 30 km away) is warmest in September at about 29°C and coldest in February near 26°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 | 26 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 26 | Warm |
| Mar | 26 | Warm |
| Apr | 27 | Warm |
| May | 27 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in Guaynabo 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 Guaynabo peaks around April 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (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 | 12 | 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 | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Guaynabo 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 Guaynabo is worst in July — around 25 µg/m³ PM2.5 (moderate), about 4.7× 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 | 9 | 14 | 24 | 25 | 20 | 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 | 9 | Good |
| May | 14 | Moderate |
| Jun | 24 | Moderate |
| Jul | 25 | Moderate |
| Aug | 20 | Moderate |
| Sep | 15 | Moderate |
| Oct | 15 | Moderate |
| Nov | 8 | Good |
| Dec | 5 | Good |
Where is Guaynabo?
Guaynabo sits at 18.4°N, 66.1°W, 47 m above sea level, in Puerto Rico. The nearest listed city is Bayamón, 7.0 km away.
Topography around Guaynabo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Guaynabo.
Within 3 km, the terrain around Guaynabo has only modest variations in elevation — a maximum elevation change of 192 m around an average of 64 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 654 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,308 m.
The land around Guaynabo is covered by trees (51%) and artificial surfaces (45%) within 3 km, trees (54%) and artificial surfaces (28%) within 16 km, and water (61%) and trees (30%) 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 Guaynabo (18.3575°, -66.111°, elevation 47 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).