Ashton/Climate
< Ashton
Ashton experiences a climate on the boundary between Mediterranean (Köppen Csb) and oceanic (Köppen Cfb). Although the rainfall is extremely high between October and March, July and August still have a distinct excess of evaporation over rainfall. Temperatures are generally very mild due to the proximity of the warm Pacific Ocean and the Kuroshio Current: snow is extremely rare although during December 1964 22.3 inches (57 cm) fell. Occasionally, southeasterly winds can cause very high temperatures. For example, in August 1981, the temperature in Ashton reached 105 °F (40.6 °C).
| Climate data for Ashton | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 66 (19) |
73 (23) |
82 (28) |
88 (31) |
96 (36) |
97 (36) |
105 (41) |
105 (41) |
100 (38) |
86 (30) |
73 (23) |
63 (17) |
105 (41) |
| Average high °F (°C) | 45.8 (7.7) |
49.4 (9.7) |
52.9 (11.6) |
57.1 (13.9) |
61.8 (16.6) |
65.5 (18.6) |
69.1 (20.6) |
69.8 (21.0) |
68.5 (20.3) |
61.3 (16.3) |
52.0 (11.1) |
46.6 (8.1) |
58.3 (14.6) |
| Average low °F (°C) | 34.6 (1.4) |
35.3 (1.8) |
36.7 (2.6) |
39.4 (4.1) |
43.9 (6.6) |
48.5 (9.2) |
51.3 (10.7) |
51.9 (11.1) |
48.7 (9.3) |
43.7 (6.5) |
38.7 (3.7) |
35.7 (2.1) |
42.4 (5.8) |
| Record low °F (°C) | 6 (−14) |
8 (−13) |
18 (−8) |
20 (−7) |
25 (−4) |
32 (0) |
34 (1) |
36 (2) |
30 (−1) |
19 (−7) |
11 (−12) |
6 (−14) |
6 (−14) |
| Average precipitation inches (mm) | 12.78 (325) |
9.73 (247) |
8.85 (225) |
5.76 (146) |
3.68 (93) |
2.66 (68) |
1.20 (30) |
1.61 (41) |
3.50 (89) |
7.31 (186) |
12.54 (319) |
13.5 (340) |
83.2 (2,110) |
| Average snowfall inches (cm) | 4.4 (11) |
1.9 (4.8) |
0.7 (1.8) |
0.1 (0.25) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.4 (1.0) |
1.1 (2.8) |
8.6 (21.65) |
| Average precipitation days (≥ 0.01 inch) | 21 | 18 | 20 | 17 | 13 | 11 | 6 | 7 | 10 | 16 | 20 | 22 | 181 |
| Source: NWS Seattle WA | |||||||||||||