Annual mean 27°C · wettest around August · prevailing wind E
Warmest
31.2 °C
Coldest
27.5 °C
Wettest
31%
Windiest
6.2 m/s
Prevailing
E
5.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Guaynabo over the whole year is 27°C. September is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 23°C. Guaynabo has no sharply defined rainy season: the chance of rain on a given day runs from 22% in March, the driest month, to 30% in August, the wettest. Winds in Guaynabo are highest in July, averaging 4.0 m/s (14 km/h), and lightest in October, at 2.3 m/s (8 km/h). The prevailing wind is from the E. The clearest skies in Guaynabo come in September, when the sky is typically 49% covered; November is the cloudiest month, at 54%.
Month by month Guaynabo climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
28°C
23°C
29°C
22%
51%
3.1 m/s
34
78
3
February
28°C
23°C
28°C
26%
52%
3.5 m/s
42
75
5
March
28°C
23°C
29°C
22%
51%
3.6 m/s
39
77
4
April
28°C
24°C
29°C
29%
53%
3.5 m/s
27
75
2
May
29°C
25°C
31°C
29%
52%
3.5 m/s
9
66
0
June
30°C
26°C
32°C
27%
50%
3.9 m/s
4
58
0
July
31°C
27°C
33°C
30%
52%
4.0 m/s
2
57
0
August
31°C
27°C
33°C
30%
51%
3.6 m/s
1
48
0
September
31°C
27°C
34°C
23%
49%
2.9 m/s
1
40
0
October
31°C
26°C
34°C
28%
52%
2.3 m/s
1
45
0
November
30°C
25°C
32°C
30%
54%
2.5 m/s
4
62
0
December
29°C
24°C
30°C
29%
51%
3.0 m/s
20
72
1
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Guaynabo weather by season
Year round, Guaynabo has days of about 28°C at their warmest in February, its coolest month, and 31°C in September, its warmest; the coolest hours of the day run from 23°C to 27°C through the year, and the average temperature over the year is 27°C around the clock. Rain is most likely around August and least likely around March. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Guaynabo weather in winterDecember to February
High 28°CLow 24°CRain 26%
Winter in Guaynabo has typical daily highs of about 28°C and lows of about 24°C, with a 26% chance of rain on a given day.
Guaynabo weather in springMarch to May
High 29°CLow 24°CRain 27%
Spring in Guaynabo has typical daily highs of about 29°C and lows of about 24°C, with a 27% chance of rain on a given day.
Guaynabo weather in summerJune to August
High 30°CLow 27°CRain 29%
Summer in Guaynabo has typical daily highs of about 30°C and lows of about 27°C, with a 29% chance of rain on a given day.
Guaynabo weather in autumnSeptember to November
High 30°CLow 26°CRain 27%
Autumn in Guaynabo has typical daily highs of about 30°C and lows of about 26°C, with a 27% chance of rain on a given day.
When is the rainy season in Guaynabo?
Guaynabo has no sharply defined rainy season: the chance of rain on a given day runs from 22% in March, the driest month, to 30% in August, the wettest.
What time of year is Guaynabo windiest?
Winds in Guaynabo are highest in July, averaging 4.0 m/s (14 km/h), and lightest in October, at 2.3 m/s (8 km/h). The prevailing wind is from the E.
What is the average temperature in Guaynabo year round?
The average temperature in Guaynabo over the whole year is 27°C. September is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 23°C.