Climate
The most significant difference between Eastern Washington and the western half of the state is its climate. While the west half of the state is located in a rainy oceanic climate, the eastern half receives little rainfall due to the rainshadow created by the Cascade Mountains. Also, due to being farther from the sea, the east side has both hotter summers and colder winters than the west. Most communities in Eastern Washington, for example, have significant yearly snowfall, while in the west snowfall is minimal and not seen every year. The east and west do still have some climatic traits in common, though: more rainfall in winter than summer, a lack of severe storms, and milder temperature ranges than more inland locations.
There is some variation in both rainfall throughout Eastern Washington. Generally, lower elevations are both hotter and drier than higher elevations. This is easily seen in the comparison between low-elevation Richland with higher elevation Spokane.
| Climate data for Richland, Washington | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 71 (22) |
73 (23) |
82 (28) |
92 (33) |
104 (40) |
110 (43) |
110 (43) |
113 (45) |
106 (41) |
89 (32) |
77 (25) |
66 (19) |
113 (45) |
| Average high °F (°C) | 41 (5) |
48 (9) |
58 (14) |
65 (18) |
73 (23) |
80 (27) |
88 (31) |
88 (31) |
78 (26) |
64 (18) |
49 (9) |
38 (3) |
88 (31) |
| Average low °F (°C) | 29 (−2) |
30 (−1) |
35 (2) |
41 (5) |
48 (9) |
54 (12) |
59 (15) |
58 (14) |
50 (10) |
40 (4) |
34 (1) |
28 (−2) |
28 (−2) |
| Record low °F (°C) | −21 (−29) |
−22 (−30) |
11 (−12) |
23 (−5) |
30 (−1) |
38 (3) |
41 (5) |
39 (4) |
31 (−1) |
13 (−11) |
−6 (−21) |
−10 (−23) |
−22 (−30) |
| Precipitation inches (mm) | 1.01 (25.7) |
0.80 (20.3) |
0.69 (17.5) |
0.60 (15.2) |
0.65 (16.5) |
0.50 (12.7) |
0.25 (6.4) |
0.16 (4.1) |
0.31 (7.9) |
0.54 (13.7) |
1.02 (25.9) |
1.12 (28.4) |
7.6 (193) |
| Source: Weather.com | |||||||||||||
| Climate data for Spokane, Washington (Spokane Int'l), 1981–2010 normals | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 62 (17) |
63 (17) |
74 (23) |
90 (32) |
97 (36) |
101 (38) |
108 (42) |
108 (42) |
98 (37) |
87 (31) |
70 (21) |
60 (16) |
108 (42) |
| Average high °F (°C) | 34.5 (1.4) |
39.7 (4.3) |
49.0 (9.4) |
57.3 (14.1) |
66.5 (19.2) |
73.9 (23.3) |
83.4 (28.6) |
83.0 (28.3) |
73.0 (22.8) |
58.1 (14.5) |
41.7 (5.4) |
32.3 (0.2) |
57.7 (14.3) |
| Average low °F (°C) | 23.7 (−4.6) |
25.4 (−3.7) |
30.6 (−0.8) |
35.8 (2.1) |
42.8 (6.0) |
49.5 (9.7) |
55.3 (12.9) |
54.8 (12.7) |
46.4 (8.0) |
36.3 (2.4) |
28.8 (−1.8) |
21.5 (−5.8) |
37.6 (3.1) |
| Record low °F (°C) | −30 (−34) |
−24 (−31) |
−10 (−23) |
14 (−10) |
24 (−4) |
33 (1) |
37 (3) |
35 (2) |
22 (−6) |
7 (−14) |
−21 (−29) |
−25 (−32) |
−30 (−34) |
| Precipitation inches (mm) | 1.79 (45.5) |
1.33 (33.8) |
1.61 (40.9) |
1.28 (32.5) |
1.62 (41.1) |
1.25 (31.8) |
.64 (16.3) |
.59 (15) |
.67 (17) |
1.18 (30) |
2.30 (58.4) |
2.29 (58.2) |
16.55 (420.4) |
| Snowfall inches (cm) | 12.0 (30.5) |
7.2 (18.3) |
3.7 (9.4) |
1.0 (2.5) |
.1 (0.3) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
.1 (0.3) |
7.2 (18.3) |
14.9 (37.8) |
46.2 (117.3) |
| Avg. precipitation days (≥ 0.01 in) | 13.4 | 10.4 | 11.6 | 10.1 | 10.2 | 7.9 | 5.0 | 3.8 | 5.1 | 7.8 | 13.7 | 13.2 | 112.2 |
| Avg. snowy days (≥ 0.1 in) | 8.9 | 5.1 | 4.1 | 1.1 | .3 | 0 | 0 | 0 | 0 | .2 | 4.7 | 9.8 | 34.2 |
| Mean monthly sunshine hours | 77.5 | 118.7 | 198.4 | 243.0 | 297.6 | 324.0 | 381.3 | 341.0 | 270.0 | 192.2 | 75.0 | 58.9 | 2,577.6 |
| Source #1: NOAA | |||||||||||||
| Source #2: HKO (sun only 1961−1990) | |||||||||||||
Read more about this topic: Eastern Washington
Famous quotes containing the word climate:
“A positive learning climate in a school for young children is a composite of many things. It is an attitude that respects children. It is a place where children receive guidance and encouragement from the responsible adults around them. It is an environment where children can experiment and try out new ideas without fear of failure. It is an atmosphere that builds children’s self-confidence so they dare to take risks. It is an environment that nurtures a love of learning.”
—Carol B. Hillman (20th century)
“When we consider how much climate contributes to the happiness of our condition, by the fine sensation it excites, and the productions it is the parent of, we have reason to value highly the accident of birth in such a one as that of Virginia.”
—Thomas Jefferson (1743–1826)
“The climate has been described as “ten months winter and two months mighty late in the fall.””
—Administration in the State of Colo, U.S. public relief program (1935-1943)