San Juan Weather Averages

Climate averages for San Juan based on 10 years of historical data.

Average San Juan temperatures by month

Avg high

28°

J

28°

F

28°

M

29°

A

30°

M

31°

J

31°

J

31°

A

31°

S

30°

O

29°

N

28°

D

Avg low

22°

J

22°

F

22°

M

23°

A

24°

M

25°

J

26°

J

26°

A

26°

S

25°

O

24°

N

24°

D

Average rainfall in San Juan by month

Rainfall (mm)

54

J

61

F

62

M

86

A

92

M

63

J

89

J

106

A

191

S

148

O

146

N

76

D

Sunshine hours in San Juan by month

Sunshine (h/day)

2

J

2

F

2

M

2

A

2

M

2

J

1

J

1

A

1

S

1

O

1

N

2

D

Humidity in San Juan by month

Average humidity

76%

J

75%

F

75%

M

75%

A

76%

M

76%

J

77%

J

77%

A

77%

S

77%

O

78%

N

77%

D

Month-by-month averages

Month	Avg High	Avg Low	Rainfall	Sunshine
Vejr i Januar	28°C	22°C	54 mm	1.9h
Vejr i Februar	28°C	22°C	61 mm	2.0h
Vejr i Marts	28°C	22°C	62 mm	2.0h
Vejr i April	29°C	23°C	86 mm	1.9h
Vejr i Maj	30°C	24°C	92 mm	1.6h
Vejr i Juni	31°C	25°C	63 mm	1.9h
Vejr i Juli	31°C	26°C	89 mm	1.4h
Vejr i August	31°C	26°C	106 mm	1.3h
Vejr i September	31°C	26°C	191 mm	1.0h
Vejr i Oktober	30°C	25°C	148 mm	1.0h
Vejr i November	29°C	24°C	146 mm	1.2h
Vejr i December	28°C	24°C	76 mm	1.5h