| Climate data for Seattle
(SeaTac Airport) |
| Month |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| Average high deg F (deg C) |
45.8
(7.67) |
49.5
(9.72) |
53.2
(11.78) |
58.2
(14.56) |
64.4
(18) |
69.6
(20.89) |
75.3
(24.06) |
75.6
(24.22) |
70.2
(21.22) |
59.7
(15.39) |
50.5
(10.28) |
45.5
(7.5) |
59.8
(15.44) |
| Average low deg F (deg C) |
35.9
(2.17) |
37.2
(2.89) |
39.1
(3.94) |
42.1
(5.61) |
47.2
(8.44) |
51.7
(10.94) |
55.3
(12.94) |
55.7
(13.17) |
51.9
(11.06) |
45.7
(7.61) |
39.9
(4.39) |
35.9
(2.17) |
44.8
(7.11) |
| Precipitation inches (mm) |
5.13
(130.3) |
4.18
(106.2) |
3.75
(95.3) |
2.59
(65.8) |
1.78
(45.2) |
1.49
(37.8) |
.79
(20.1) |
1.02
(25.9) |
1.63
(41.4) |
3.19
(81) |
5.90
(149.9) |
5.62
(142.7) |
37.07
(941.6) |
| Snowfall inches (cm) |
2.1
(5.3) |
1.3
(3.3) |
0.6
(1.5) |
0
(0) |
0
(0) |
0
(0) |
0
(0) |
0
(0) |
0
(0) |
0
(0) |
1.1
(2.8) |
1.9
(4.8) |
7.1
(18) |
| Avg. precipitation days (greater than or equal to 0.01 in) |
17.8 |
15.7 |
16.4 |
13.6 |
11.6 |
8.5 |
5.3 |
5.5 |
8.3 |
11.7 |
17.9 |
17.8 |
150.1 |
| Avg. snowy days (greater than or equal to 0.1 in) |
1.8 |
0.9 |
0.4 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.6 |
1.6 |
5.3 |
| Sunshine hours |
71.3 |
110.2 |
179.8 |
207.0 |
254.2 |
267.0 |
313.1 |
282.1 |
222.0 |
142.6 |
72.0 |
52.7 |
2,174 |
| Source #1: NOAA |
| Source #2: HKO |