Growing Degree Days April 01 through September 30, a five year review.

This page compares Growing Degree Days (GDD) from the year 2009 through 2013 for the identified dates.

GDD are calculated by subtracting a base temperature from the average daily temperature (°F). If the resulting value is less than 0, then it is set to 0. Thus GDD are always 0 or greater.

GDD = (Tmax+Tmin)/2 - Tbase


Station

Period
Base
32°F
Difference
from Avg
Base
43°F
Difference
from Avg
Base
50°F
Difference
from Avg
Prosser (WSU IAREC)
Click for 1990-2013 GDD
2013
6053
373
4041
367
2814
344
2012
5757
77
3747
73
2521
51
2011
5354
-326
3348
-326
2189
-281
2010
5429
-251
3421
-253
2221
-249
2009
5808
128
3815
141
2605
135
Avg
5680
N/A
3674
N/A
2470
N/A
Tri-Cities (WSU Tri-Cities)
2013
6537
313
4524
312
3283
307
2012
6238
14
4225
13
2977
1
2011
5895
-329
3883
-329
2677
-299
2010
6050
-174
4037
-175
2796
-180
2009
6401
177
4391
179
3149
173
Avg
6224
N/A
4212
N/A
2976
N/A
Walla Walla
2013
6230
346
4220
345
2999
338
2012
5945
61
3934
59
2690
29
2011
5599
-285
3593
-282
2412
-249
2010
5631
-253
3619
-256
2415
-246
2009
6013
129
4007
132
2789
128
Avg
5884
N/A
3875
N/A
2661
N/A
Wenatchee (WSU TFREC)
2013
6346
340
4333
335
3106
322
2012
6048
42
4037
39
2805
21
2011
5666
-340
3658
-340
2480
-304
2010
5791
-215
3793
-205
2588
-196
2009
6179
173
4168
170
2941
157
Avg
6006
N/A
3998
N/A
2784
N/A
Moxee
2013
5574
398
3582
388
2415
359
2012
5330
154
3331
137
2153
97
2011
4890
-286
2920
-274
1826
-230
2010
4969
-207
2989
-205
1850
-206
2009
5118
-58
3146
-48
2038
-18
Avg
5176
N/A
3194
N/A
2056
N/A
Omak (Pogue Flat)
2013
5965
285
3957
277
2768
262
2012
5741
61
3735
55
2547
41
2011
5326
-354
3336
-344
2218
-288
2010
5404
-276
3409
-271
2230
-276
2009
5964
284
3964
284
2767
261
Avg
5680
N/A
3680
N/A
2506
N/A
Moses Lake
2013
5951
234
3945
232
2735
223
2012
5735
18
3727
14
2507
-5
2011
5373
-344
3372
-341
2215
-297
2010
5594
-123
3590
-123
2387
-125
2009
5932
215
3931
218
2717
205
Avg
5717
N/A
3713
N/A
2512
N/A
Pullman
2013
4749
234
2807
237
1714
206
2012
4623
108
2644
74
1544
36
2011
4234
-281
2321
-249
1319
-189
2010
4321
-194
2380
-190
1341
-167
2009
4646
131
2698
128
1622
114
Avg
4515
N/A
2570
N/A
1508
N/A
Royal City East
2013
6066
334
4054
330
2833
309
2012
5787
55
3775
51
2550
26
2011
5378
-354
3371
-353
2225
-299
2010
5490
-242
3482
-242
2286
-238
2009
5939
207
3938
214
2728
204
Avg
5732
N/A
3724
N/A
2524
N/A
Mt. Vernon (WSU NWREC)
2013
4945
301
2934
293
1714
264
2012
4577
-67
2565
-76
1343
-107
2011
4461
-183
2454
-187
1321
-129
2010
4536
-108
2524
-117
1315
-135
2009
4701
57
2727
86
1555
105
Avg
4644
N/A
2641
N/A
1450
N/A
Long Beach (WSU Long Beach)
2013
4387
264
2374
250
1184
201
2012
4052
-71
2047
-77
894
-89
2011
3966
-157
1971
-153
891
-92
2010
3929
-194
1946
-178
796
-187
2009
4283
160
2279
155
1149
166
Avg
4123
N/A
2124
N/A
983
N/A
Sequim
2013
4481
326
2473
312
1301
252
2012
4100
-55
2105
-56
979
-70
2011
3968
-187
1986
-175
928
-121
2010
4011
-144
2017
-144
906
-143
2009
4214
59
2227
66
1130
81
Avg
4155
N/A
2161
N/A
1049
N/A
Prosser (WSU IAREC) Accumulated GDD
April 1 to September 30
 Base Temperature °F
Year4350
2013
4027
2814
2012
3735
2498
2011
3355
2189
2010
3428
2221
2009
3828
2605
2008
3475
2312
2007
3646
2427
2006
3816
2575
2005
3728
2487
2004
3838
2565
2003
3853
2646
2002
3637
2431
2001
3697
2450
2000
3627
2355
1999
3327
2123
1998
4019
2771
1997
3693
2439
1996
3436
2162
1995
3612
2368
1994
3988
2695
1993
3465
2189
1992
3954
2666
1991
3713
2431
1990
4056
2756
Average
3706
2466
Washington State University