Frost Dates for RIO PIEDRAS, Puerto Rico

Elevation: 14 m

Frost Dates

This location never reaches freezing temperatures, so you can plant year-round!

In tropical and subtropical climates, the main challenge isn’t frost — it’s heat and humidity. Learn more about gardening in tropical climates.

18.40°N, -66.07°W © OpenStreetMap

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 13b

Avg. annual minimum: 18 to 21°C

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Af Tropical Rainforest

Hot and wet year-round with no dry season. Ideal for tropical crops like bananas, mangoes, and cocoa. Gardening is possible all year, but high humidity can increase disease pressure.

Köppen climate map

Temperature

20° 25° 30° 35°
24°
High: 28°C
Avg: 24°C
Low: 21°C
Jan
24°
High: 29°C
Avg: 24°C
Low: 21°C
Feb
25°
High: 29°C
Avg: 25°C
Low: 21°C
Mar
26°
High: 30°C
Avg: 26°C
Low: 22°C
Apr
26°
High: 30°C
Avg: 26°C
Low: 23°C
May
27°
High: 31°C
Avg: 27°C
Low: 24°C
Jun
27°
High: 32°C
Avg: 27°C
Low: 24°C
Jul
27°
High: 32°C
Avg: 27°C
Low: 25°C
Aug
27°
High: 31°C
Avg: 27°C
Low: 24°C
Sep
27°
High: 30°C
Avg: 27°C
Low: 24°C
Oct
25°
High: 29°C
Avg: 25°C
Low: 23°C
Nov
25°
High: 28°C
Avg: 25°C
Low: 22°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 50 mm 100 mm 150 mm 200 mm
66 mm
66.0 mm
Jan
43 mm
43.2 mm
Feb
58 mm
58.4 mm
Mar
89 mm
88.9 mm
Apr
145 mm
144.8 mm
May
86 mm
86.4 mm
Jun
107 mm
106.7 mm
Jul
119 mm
119.4 mm
Aug
175 mm
175.3 mm
Sep
157 mm
157.5 mm
Oct
135 mm
134.6 mm
Nov
79 mm
78.7 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec11h11.5h12h12.5h13h13h13h12.5h12h11.5h11h11h
Jan: 6:30 AM – 5:30 PM · 11h 00m
Feb: 6:18 AM – 5:42 PM · 11h 24m
Mar: 6:04 AM – 5:56 PM · 11h 52m
Apr: 5:47 AM – 6:13 PM · 12h 25m
May: 5:34 AM – 6:26 PM · 12h 52m
Jun: 5:27 AM – 6:33 PM · 13h 06m
Jul: 5:30 AM – 6:30 PM · 13h 00m
Aug: 5:41 AM – 6:19 PM · 12h 37m
Sep: 5:57 AM – 6:03 PM · 12h 06m
Oct: 6:13 AM – 5:47 PM · 11h 34m
Nov: 6:27 AM – 5:33 PM · 11h 07m
Dec: 6:33 AM – 5:27 PM · 10h 54m
Daylight Longest: 13h 06m · Shortest: 10h 54m

Nearby Stations

RIO PIEDRAS EXP STN, Puerto Rico SAN JUAN L M MARIN AP, Puerto Rico SAN JUAN CITY, Puerto Rico WFO SAN JUAN, Puerto Rico SAN JUAN NS, Puerto Rico TRUJILLO ALTO 2 SSW, Puerto Rico

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