GDU Data

GDU Information

Growing degree units (GDUs) are a more effective measuring tool to predict crop and insect development throughout the growing season rather than simply relying on calendar days. Calculating growing degree units for corn uses a minimum daily temperature of 50°F and a maximum daily temperature of 86°F with a base temperature of 50°F.

Platte Valley GDU Data

Data available for the following time period: 1/1/2024 – 4/21/2024

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Day	Date	High	Adj High	Low	Adj Low	Day Total	Normal	Difference
1	01/01/2024	27	27	11	50	0.00	0.00	0.00
2	02/01/2024	40	40	20	50	0.00	0.00	0.00
3	03/01/2024	40	40	20	50	0.00	0.00	0.00
4	04/01/2024	30	30	23	50	0.00	0.40	-0.40
5	05/01/2024	29	29	28	50	0.00	0.00	0.00
6	06/01/2024	33	33	25	50	0.00	0.00	0.00
7	07/01/2024	32	32	13	50	0.00	0.00	0.00
8	08/01/2024	32	32	15	50	0.00	0.00	0.00
9	09/01/2024	25	25	14	50	0.00	0.10	-0.10
10	10/01/2024	37	37	16	50	0.00	0.20	-0.20
11	11/01/2024	23	23	2	50	0.00	0.40	-0.40
12	12/01/2024	2	2	-7	50	0.00	0.70	-0.70
13	01/01/1970	-2	-2	-15	50	0.00	1.10	-1.10
14	01/01/1970	-4	-4	-16	50	0.00	0.20	-0.20
15	01/01/1970	-1	-1	-9	50	0.00	0.10	-0.10
16	01/01/1970	9	9	-12	50	0.00	0.30	-0.30
17	01/01/1970	24	24	7	50	0.00	0.30	-0.30
18	01/01/1970	18	18	0	50	0.00	0.90	-0.90
19	01/01/1970	8	8	-6	50	0.00	1.20	-1.20
20	01/01/1970	4	4	-10	50	0.00	0.40	-0.40
21	01/01/1970	29	29	5	50	0.00	0.00	0.00
22	01/01/1970	32	32	21	50	0.00	0.00	0.00
23	01/01/1970	31	31	29	50	0.00	0.20	-0.20
24	01/01/1970	32	32	30	50	0.00	0.30	-0.30
25	01/01/1970	31	31	29	50	0.00	0.00	0.00
26	01/01/1970	29	29	25	50	0.00	1.00	-1.00
27	01/01/1970	43	43	22	50	0.00	0.90	-0.90
28	01/01/1970	44	44	21	50	0.00	0.90	-0.90
29	01/01/1970	53	53	31	50	1.98	0.90	1.08
30	01/01/1970	53	53	31	50	1.96	0.80	1.16
31	01/01/1970	61	61	31	50	5.52	0.60	4.92
32	01/02/2024	52	52	32	50	1.40	0.50	0.90
33	02/02/2024	53	53	31	50	1.96	0.70	1.26
34	03/02/2024	42	42	38	50	0.00	0.50	-0.50
35	04/02/2024	41	41	32	50	0.00	0.20	-0.20
36	05/02/2024	48	48	28	50	0.00	0.40	-0.40
37	06/02/2024	52	52	30	50	1.24	0.00	1.24
38	07/02/2024	52	52	41	50	1.33	0.90	0.43
39	08/02/2024	50	50	33	50	0.34	1.00	-0.66
40	09/02/2024	46	46	26	50	0.00	0.20	-0.20
41	10/02/2024	34	34	24	50	0.00	2.20	-2.20
42	11/02/2024	43	43	24	50	0.00	0.40	-0.40
43	12/02/2024	55	55	25	50	2.70	0.00	2.70
44	01/01/1970	48	48	36	50	0.00	0.70	-0.70
45	01/01/1970	58	58	27	50	4.05	0.10	3.95
46	01/01/1970	36	36	24	50	0.00	1.10	-1.10
47	01/01/1970	27	27	7	50	0.00	1.40	-1.40
48	01/01/1970	40	40	7	50	0.00	1.60	-1.60
49	01/01/1970	50	50	18	50	0.50	3.10	-2.61
50	01/01/1970	57	57	25	50	3.67	2.00	1.67
51	01/01/1970	70	70	27	50	10.08	1.70	8.38
52	01/01/1970	65	65	32	50	7.87	1.90	5.97
53	01/01/1970	59	59	34	50	4.92	1.70	3.22
54	01/01/1970	57	57	31	50	3.96	0.20	3.76
55	01/01/1970	63	63	23	50	6.92	0.00	6.92
56	01/01/1970	66	66	30	50	8.31	0.00	8.31
57	01/01/1970	76	76	35	50	13.01	1.00	12.01
58	01/01/1970	43	43	10	50	0.00	1.70	-1.70
59	01/01/1970	43	43	3	50	0.00	1.40	-1.40
60	01/01/1970	61	61	35	50	5.77	1.90	3.87
61	01/03/2024	62	62	27	50	6.13	3.10	3.03
62	02/03/2024	49	49	33	50	0.00	3.00	-3.00
63	03/03/2024	61	61	39	50	5.99	4.90	1.09
64	04/03/2024	55	55	30	50	2.77	3.50	-0.73
65	05/03/2024	55	55	21	50	2.59	4.10	-1.51
66	06/03/2024	55	55	32	50	2.90	3.30	-0.40
67	07/03/2024	49	49	28	50	0.00	4.60	-4.60
68	08/03/2024	41	41	24	50	0.00	4.90	-4.90
69	09/03/2024	51	51	19	50	0.64	3.80	-3.16
70	10/03/2024	68	68	25	50	9.08	2.10	6.98
71	11/03/2024	74	74	31	50	12.36	4.10	8.26
72	12/03/2024	69	69	39	50	9.52	4.00	5.52
73	01/01/1970	68	68	42	50	9.13	3.60	5.53
74	01/01/1970	52	52	41	50	1.10	6.40	-5.30
75	01/01/1970	56	56	29	50	3.40	3.80	-0.41
76	01/01/1970	55	55	31	50	2.58	2.60	-0.02
77	01/01/1970	40	40	19	50	0.00	1.30	-1.30
78	01/01/1970	48	48	13	50	0.00	3.60	-3.60
79	01/01/1970	66	66	33	50	8.12	5.60	2.52
80	01/01/1970	45	45	28	50	0.00	3.80	-3.80
81	01/01/1970	58	58	26	50	4.19	4.20	-0.01
82	01/01/1970	42	42	27	50	0.00	3.10	-3.10
83	01/01/1970	40	40	24	50	0.00	1.10	-1.10
84	01/01/1970	52	52	32	50	1.10	1.30	-0.20
85	01/01/1970	33	33	22	50	0.00	3.40	-3.40
86	01/01/1970	27	27	15	50	0.00	1.90	-1.90
87	01/01/1970	43	43	13	50	0.00	3.30	-3.30
88	01/01/1970	65	65	32	50	7.86	5.20	2.66
89	01/01/1970	59	59	38	50	4.72	5.50	-0.79
90	01/01/1970	49	49	33	50	0.00	4.70	-4.70
91	01/01/1970	52	52	34	50	1.31	5.30	-4.00
92	01/04/2024	41	41	34	50	0.00	5.50	-5.50
93	02/04/2024	54	54	32	50	2.37	4.20	-1.84
94	03/04/2024	55	55	30	50	2.63	5.70	-3.07
95	04/04/2024	60	60	27	50	5.17	6.90	-1.74
96	05/04/2024	65	65	35	50	7.81	6.50	1.31
97	06/04/2024	67	67	41	50	8.54	5.40	3.14
98	07/04/2024	53	53	40	50	1.90	8.30	-6.40
99	08/04/2024	61	61	31	50	5.97	8.20	-2.24
100	09/04/2024	66	66	30	50	8.25	6.60	1.65
101	10/04/2024	68	68	38	50	9.25	9.20	0.05
102	11/04/2024	59	59	38	50	4.88	10.60	-5.72
103	12/04/2024	70	70	29	50	10.07	6.10	3.97
104	01/01/1970	85	85	46	50	17.51	5.80	11.71
105	01/01/1970	82	82	48	50	16.40	5.80	10.60
106	01/01/1970	85	85	55	55	20.00	5.80	14.20
107	01/01/1970	70	70	47	50	10.00	6.00	4.00
108	01/01/1970	66	66	39	50	8.00	7.30	0.70
109	01/01/1970	51	51	35	50	0.50	6.90	-6.40
110	01/01/1970	51	51	34	50	0.50	7.30	-6.80
111	01/01/1970	50	50	32	50	0.00	7.10	-7.10
112	01/01/1970	56	56	35	50	3.00	8.50	-5.50
	Date
						∑ = 325.61	∑ = 299.20	∑ = 26.41
						Avg = 5.61	Avg = 3.05	Avg = 0.26
						Min = 0.00	Min = 0.00	Min = -7.10
						Max = 20.00	Max = 10.60	Max = 14.20

Results

Total Actual GDUs:
∑ = 325.61

Total Normal GDUs:
∑ = 299.20

Total Difference:
∑ = 26.41

Holt County GDU Data

Data available for the following time period: 1/1/2024 – 4/21/2024

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Day	Date	High	Adj High	Low	Adj Low	Day Total	Normal	Difference
1	01/01/2024	36	36	4	50	0.00	0.00	0.00
2	02/01/2024	33	33	19	50	0.00	0.00	0.00
3	03/01/2024	24	24	17	50	0.00	0.20	-0.20
4	04/01/2024	29	29	23	50	0.00	0.10	-0.10
5	05/01/2024	32	32	28	50	0.00	0.00	0.00
6	06/01/2024	32	32	20	50	0.00	0.00	0.00
7	07/01/2024	25	25	16	50	0.00	0.00	0.00
8	08/01/2024	25	25	13	50	0.00	0.20	-0.20
9	09/01/2024	20	20	7	50	0.00	0.10	-0.10
10	10/01/2024	34	34	13	50	0.00	0.00	0.00
11	11/01/2024	11	11	0	50	0.00	0.20	-0.20
12	12/01/2024	0	0	-8	50	0.00	0.60	-0.60
13	01/01/1970	-7	-7	-18	50	0.00	0.50	-0.50
14	01/01/1970	-8	-8	-21	50	0.00	0.00	0.00
15	01/01/1970	-6	-6	-11	50	0.00	0.00	0.00
16	01/01/1970	13	13	-9	50	0.00	0.00	0.00
17	01/01/1970	22	22	10	50	0.00	0.30	-0.30
18	01/01/1970	16	16	-2	50	0.00	0.60	-0.60
19	01/01/1970	0	0	-11	50	0.00	0.80	-0.80
20	01/01/1970	6	6	-16	50	0.00	0.10	-0.10
21	01/01/1970	25	25	5	50	0.00	0.00	0.00
22	01/01/1970	31	31	15	50	0.00	0.00	0.00
23	01/01/1970	28	28	18	50	0.00	0.00	0.00
24	01/01/1970	30	30	28	50	0.00	0.20	-0.20
25	01/01/1970	32	32	24	50	0.00	0.00	0.00
26	01/01/1970	29	29	21	50	0.00	0.40	-0.40
27	01/01/1970	37	37	21	50	0.00	0.60	-0.60
28	01/01/1970	39	39	18	50	0.00	0.60	-0.60
29	01/01/1970	43	43	29	50	0.00	0.50	-0.50
30	01/01/1970	45	45	30	50	0.00	0.40	-0.40
31	01/01/1970	54	54	32	50	2.15	0.50	1.65
32	01/02/2024	37	37	28	50	0.00	0.50	-0.50
33	02/02/2024	37	37	33	50	0.00	0.50	-0.50
34	03/02/2024	34	34	33	50	0.00	0.10	-0.10
35	04/02/2024	34	34	31	50	0.00	0.00	0.00
36	05/02/2024	44	44	29	50	0.00	0.40	-0.40
37	06/02/2024	56	56	37	50	3.04	0.60	2.44
38	07/02/2024	54	54	41	50	2.01	1.40	0.61
39	08/02/2024	47	47	33	50	0.00	0.80	-0.80
40	09/02/2024	37	37	28	50	0.00	0.00	0.00
41	10/02/2024	31	31	26	50	0.00	1.70	-1.70
42	11/02/2024	44	44	23	50	0.00	0.00	0.00
43	12/02/2024	45	45	27	50	0.00	0.00	0.00
44	01/01/1970	42	42	29	50	0.00	0.40	-0.40
45	01/01/1970	42	42	23	50	0.00	0.20	-0.20
46	01/01/1970	26	26	18	50	0.00	0.90	-0.90
47	01/01/1970	20	20	3	50	0.00	0.90	-0.90
48	01/01/1970	32	32	5	50	0.00	1.00	-1.00
49	01/01/1970	44	44	19	50	0.00	2.20	-2.20
50	01/01/1970	49	49	29	50	0.00	2.20	-2.20
51	01/01/1970	63	63	29	50	6.91	1.20	5.71
52	01/01/1970	57	57	33	50	3.77	1.30	2.47
53	01/01/1970	54	54	32	50	2.06	0.90	1.16
54	01/01/1970	54	54	27	50	2.14	0.50	1.64
55	01/01/1970	61	61	27	50	5.83	0.00	5.83
56	01/01/1970	60	60	28	50	5.22	0.00	5.22
57	01/01/1970	71	71	39	50	10.62	0.40	10.22
58	01/01/1970	47	47	6	50	0.00	1.70	-1.70
59	01/01/1970	41	41	1	50	0.00	1.10	-1.10
60	01/01/1970	59	59	29	50	4.57	1.70	2.87
61	01/03/2024	70	70	31	50	10.32	2.30	8.02
62	02/03/2024	54	54	32	50	2.17	1.70	0.47
63	03/03/2024	55	55	29	50	2.53	3.00	-0.47
64	04/03/2024	44	44	26	50	0.00	2.90	-2.90
65	05/03/2024	51	51	25	50	0.98	3.90	-2.92
66	06/03/2024	58	58	30	50	4.39	2.70	1.69
67	07/03/2024	37	37	25	50	0.00	3.30	-3.30
68	08/03/2024	42	42	24	50	0.00	4.90	-4.90
69	09/03/2024	51	51	19	50	0.53	2.50	-1.97
70	10/03/2024	70	70	25	50	10.07	1.80	8.27
71	11/03/2024	73	73	35	50	11.86	4.20	7.66
72	12/03/2024	66	66	34	50	8.33	4.30	4.03
73	01/01/1970	61	61	42	50	5.70	3.50	2.20
74	01/01/1970	56	56	36	50	3.32	4.70	-1.38
75	01/01/1970	56	56	25	50	3.43	4.00	-0.57
76	01/01/1970	48	48	31	50	0.00	2.60	-2.60
77	01/01/1970	32	32	16	50	0.00	1.00	-1.00
78	01/01/1970	50	50	11	50	0.27	3.60	-3.33
79	01/01/1970	64	64	40	50	7.01	4.30	2.71
80	01/01/1970	41	41	25	50	0.00	2.40	-2.40
81	01/01/1970	48	48	24	50	0.00	2.90	-2.90
82	01/01/1970	32	32	24	50	0.00	1.30	-1.30
83	01/01/1970	35	35	22	50	0.00	0.90	-0.90
84	01/01/1970	31	31	26	50	0.00	1.40	-1.40
85	01/01/1970	26	26	21	50	0.00	2.50	-2.50
86	01/01/1970	21	21	10	50	0.00	2.00	-2.00
87	01/01/1970	34	34	7	50	0.00	2.80	-2.80
88	01/01/1970	46	46	20	50	0.00	4.20	-4.20
89	01/01/1970	45	45	34	50	0.00	4.40	-4.40
90	01/01/1970	39	39	32	50	0.00	3.40	-3.40
91	01/01/1970	41	41	32	50	0.00	3.80	-3.80
92	01/04/2024	35	35	30	50	0.00	5.00	-5.00
93	02/04/2024	49	49	28	50	0.00	2.60	-2.60
94	03/04/2024	48	48	28	50	0.00	5.00	-5.00
95	04/04/2024	57	57	28	50	3.55	6.30	-2.76
96	05/04/2024	61	61	31	50	5.77	4.10	1.67
97	06/04/2024	62	62	40	50	6.46	5.10	1.36
98	07/04/2024	47	47	39	50	0.00	6.80	-6.80
99	08/04/2024	47	47	35	50	0.00	6.10	-6.10
100	09/04/2024	64	64	34	50	7.16	5.10	2.06
101	10/04/2024	64	64	41	50	7.32	8.80	-1.49
102	11/04/2024	55	55	37	50	2.71	8.50	-5.79
103	12/04/2024	66	66	30	50	8.44	4.90	3.54
104	01/01/1970	87	86	42	50	18.00	4.60	13.40
105	01/01/1970	77	77	50	50	13.85	4.30	9.55
106	01/01/1970	81	81	57	57	19.00	3.70	15.30
107	01/01/1970	69	69	42	50	9.50	4.30	5.20
108	01/01/1970	59	59	35	50	4.50	5.20	-0.70
109	01/01/1970	48	48	31	50	0.00	4.30	-4.30
110	01/01/1970	48	48	30	50	0.00	5.60	-5.60
111	01/01/1970	48	48	30	50	0.00	4.30	-4.30
112	01/01/1970	55	55	33	50	2.50	7.80	-5.30
	Date
						∑ = 227.95	∑ = 235.10	∑ = -7.15
						Avg = 6.00	Avg = 2.53	Avg = -0.08
						Min = 0.00	Min = 0.00	Min = -6.80
						Max = 19.00	Max = 8.80	Max = 15.30

Results

Total Actual GDUs:
∑ = 227.95

Total Normal GDUs:
∑ = 235.10

Total Difference:
∑ = -7.15

Formula

((Max Daily Temp. + Min. Daily Temp.) / 2) – Base Temp. of 50°F for Corn = GDUs

Example: High 93°F Low 62°F

((86°F + 62°F) / 2) – 50°F = 24 GDUs

Example: High 78°F Low 48°F

((78°F + 50°F) / 2) – 50° = 14 GDUs

While monitoring GDUs can help evaluate crop progress, varying management and environmental conditions may affect the required GDUs of your specific crop, specifically during crop emergence early in the growing season. Factors such as residue carryover, soil texture, planting date, tillage practices, and seed depth may all increase the GDUs needed by 5 to 60 GDUs per factor.

GDU Information

Platte Valley GDU Data

Enter Date Range

Results

Total Actual GDUs: ∑ = 325.61

Total Normal GDUs: ∑ = 299.20

Total Difference: ∑ = 26.41

Holt County GDU Data

Enter Date Range

Results

Total Actual GDUs: ∑ = 227.95

Total Normal GDUs: ∑ = 235.10

Total Difference: ∑ = -7.15

Formula

Example: High 93°F Low 62°F

Example: High 78°F Low 48°F

Total Actual GDUs:
∑ = 325.61

Total Normal GDUs:
∑ = 299.20

Total Difference:
∑ = 26.41

Total Actual GDUs:
∑ = 227.95

Total Normal GDUs:
∑ = 235.10

Total Difference:
∑ = -7.15