Seattle Weather Averages

Climate averages for Seattle based on 10 years of historical data.

Average Seattle temperatures by month

Avg high

8°

J

8°

F

11°

M

14°

A

19°

M

22°

J

26°

J

26°

A

21°

S

16°

O

10°

N

7°

D

Avg low

3°

J

2°

F

3°

M

5°

A

9°

M

11°

J

14°

J

15°

A

12°

S

8°

O

5°

N

3°

D

Average rainfall in Seattle by month

Rainfall (mm)

188

J

124

F

109

M

87

A

55

M

54

J

15

J

27

A

67

S

134

O

192

N

202

D

Sunshine hours in Seattle by month

Sunshine (h/day)

2

J

2

F

2

M

3

A

5

M

6

J

7

J

7

A

4

S

3

O

2

N

1

D

Humidity in Seattle by month

Average humidity

84%

J

82%

F

78%

M

75%

A

73%

M

70%

J

66%

J

68%

A

73%

S

77%

O

82%

N

85%

D

Month-by-month averages

Month	Avg High	Avg Low	Rainfall	Sunshine
Počasie v januári	8°C	3°C	188 mm	1.8h
Počasie vo februári	8°C	2°C	124 mm	1.5h
Počasie v marci	11°C	3°C	109 mm	2.2h
Počasie v apríli	14°C	5°C	87 mm	2.9h
Počasie v máji	19°C	9°C	55 mm	4.6h
Počasie v júni	22°C	11°C	54 mm	5.6h
Počasie v júli	26°C	14°C	15 mm	7.2h
Počasie v auguste	26°C	15°C	27 mm	7.1h
Počasie v septembri	21°C	12°C	67 mm	4.4h
Počasie v októbri	16°C	8°C	134 mm	3.2h
Počasie v novembri	10°C	5°C	192 mm	1.8h
Počasie v decembri	7°C	3°C	202 mm	1.4h