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Home > World Climate Guides > Caribbean > Puerto Rico > San Juan
San Juan Climate Guide
Puerto Rico
Metric | Imperial    Bars | Symbols
Maximum Daytime Temperature (°C)
Minimum Night-time Temperature (°C)
27
27 °C (81°F) Maximum Daytime Temperature in January
27
27 °C (81°F) Maximum Daytime Temperature in February
28
28 °C (82°F) Maximum Daytime Temperature in March
29
29 °C (84°F) Maximum Daytime Temperature in April
29
29 °C (84°F) Maximum Daytime Temperature in May
30
30 °C (86°F) Maximum Daytime Temperature in June
30
30 °C (86°F) Maximum Daytime Temperature in July
30
30 °C (86°F) Maximum Daytime Temperature in August
30
30 °C (86°F) Maximum Daytime Temperature in September
30
30 °C (86°F) Maximum Daytime Temperature in October
29
29 °C (84°F) Maximum Daytime Temperature in November
28
28 °C (82°F) Maximum Daytime Temperature in December
J F M A M J J A S O N D
20
20 °C (68°F) Minimum Night-time Temperature in January
20
20 °C (68°F) Minimum Night-time Temperature in February
21
21 °C (70°F) Minimum Night-time Temperature in March
21
21 °C (70°F) Minimum Night-time Temperature in April
22
22 °C (72°F) Minimum Night-time Temperature in May
23
23 °C (73°F) Minimum Night-time Temperature in June
24
24 °C (75°F) Minimum Night-time Temperature in July
24
24 °C (75°F) Minimum Night-time Temperature in August
23
23 °C (73°F) Minimum Night-time Temperature in September
23
23 °C (73°F) Minimum Night-time Temperature in October
22
22 °C (72°F) Minimum Night-time Temperature in November
21
21 °C (70°F) Minimum Night-time Temperature in December
J F M A M J J A S O N D
Hours of Sunshine
Hours of Daylight
8
8 Hours of Sunshine (69% of Daylight Hours) in January
8
8 Hours of Sunshine (71% of Daylight Hours) in February
9
9 Hours of Sunshine (75% of Daylight Hours) in March
9
9 Hours of Sunshine (71% of Daylight Hours) in April
8
8 Hours of Sunshine (63% of Daylight Hours) in May
9
9 Hours of Sunshine (65% of Daylight Hours) in June
9
9 Hours of Sunshine (69% of Daylight Hours) in July
9
9 Hours of Sunshine (68% of Daylight Hours) in August
8
8 Hours of Sunshine (64% of Daylight Hours) in September
7
7 Hours of Sunshine (62% of Daylight Hours) in October
7
7 Hours of Sunshine (60% of Daylight Hours) in November
7
7 Hours of Sunshine (64% of Daylight Hours) in December
J F M A M J J A S O N D
11
11 Hours of Daylight in January
12
12 Hours of Daylight in February
12
12 Hours of Daylight in March
13
13 Hours of Daylight in April
13
13 Hours of Daylight in May
13
13 Hours of Daylight in June
13
13 Hours of Daylight in July
13
13 Hours of Daylight in August
12
12 Hours of Daylight in September
12
12 Hours of Daylight in October
11
11 Hours of Daylight in November
11
11 Hours of Daylight in December
J F M A M J J A S O N D
Days with some Rain
Monthly Rainfall (mm)
20
20 Days with some Rain in January
15
15 Days with some Rain in February
15
15 Days with some Rain in March
14
14 Days with some Rain in April
16
16 Days with some Rain in May
17
17 Days with some Rain in June
19
19 Days with some Rain in July
20
20 Days with some Rain in August
18
18 Days with some Rain in September
18
18 Days with some Rain in October
19
19 Days with some Rain in November
21
21 Days with some Rain in December
J F M A M J J A S O N D
116
116 mm (4.6 inches) Monthly Rainfall in January
82
82 mm (3.2 inches) Monthly Rainfall in February
79
79 mm (3.1 inches) Monthly Rainfall in March
121
121 mm (4.8 inches) Monthly Rainfall in April
182
182 mm (7.2 inches) Monthly Rainfall in May
151
151 mm (5.9 inches) Monthly Rainfall in June
180
180 mm (7.1 inches) Monthly Rainfall in July
195
195 mm (7.7 inches) Monthly Rainfall in August
188
188 mm (7.4 inches) Monthly Rainfall in September
171
171 mm (6.7 inches) Monthly Rainfall in October
178
178 mm (7.0 inches) Monthly Rainfall in November
151
151 mm (5.9 inches) Monthly Rainfall in December
J F M A M J J A S O N D
Heat & Humidity / Chance of Frost
UV Index (Maximum)
M
Moderate Heat & Humidity in January
M
Moderate Heat & Humidity in February
M
Moderate Heat & Humidity in March
M
Moderate Heat & Humidity in April
H
High Heat & Humidity in May
H
High Heat & Humidity in June
H
High Heat & Humidity in July
H
High Heat & Humidity in August
H
High Heat & Humidity in September
H
High Heat & Humidity in October
M
Moderate Heat & Humidity in November
M
Moderate Heat & Humidity in December
J F M A M J J A S O N D
8
UV 8 (Very High) in January
10
UV 10 (Very High) in February
11
UV 11+ (Extreme) in March
11
UV 11+ (Extreme) in April
11
UV 11+ (Extreme) in May
11
UV 11+ (Extreme) in June
11
UV 11+ (Extreme) in July
11
UV 11+ (Extreme) in August
11
UV 11+ (Extreme) in September
10
UV 10 (Very High) in October
9
UV 9 (Very High) in November
8
UV 8 (Very High) in December
J F M A M J J A S O N D
Sea Temperature (°C)
26
26 °C (79°F) Sea Temperature in January
26
26 °C (79°F) Sea Temperature in February
26
26 °C (79°F) Sea Temperature in March
27
27 °C (81°F) Sea Temperature in April
27
27 °C (81°F) Sea Temperature in May
28
28 °C (82°F) Sea Temperature in June
28
28 °C (82°F) Sea Temperature in July
29
29 °C (84°F) Sea Temperature in August
29
29 °C (84°F) Sea Temperature in September
29
29 °C (84°F) Sea Temperature in October
28
28 °C (82°F) Sea Temperature in November
27
27 °C (81°F) Sea Temperature in December
J F M A M J J A S O N D
San Juan Climate Guide (Historical Weather Averages), Puerto Rico
Elev: 0 m   Long: 066°04'W   Lat: 18°23'N
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