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Growing Degree Days Calculator

View the latest growing degree information for your postcode.

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Learn more about GDD

Base temperatures used in calculating GDD vary depending on the type of plant or pest that is being monitored. This number represents the temperature at which you will typically begin to see plant or pest growth. The base temperature most often used in calculations 10°C, because it is the temperature when active growth begins for most organisms. . However, some plants or pests can thrive in cooler environments, and in that case, 0°C is best used in calculations. For more information on which base temperature best suits your turf management plan, please contact your local extension service or Syngenta territory manager.

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Growing Degree Days for Sydney NSW Australia
Date Temp: High / Low Daily GDD Cumulative GDD
18/10/2021 25.8 °C / 9.3 °C 8 189.2
17/10/2021 21.9 °C / 7.4 °C 5.2 181.2
16/10/2021 20 °C / 8.7 °C 4.7 176
15/10/2021 20.8 °C / 10.7 °C 6.1 171.3
14/10/2021 23.3 °C / 14.8 °C 8.6 165.2
13/10/2021 15.1 °C / 12.7 °C 4 156.6
12/10/2021 14.3 °C / 12.1 °C 3.2 152.7
11/10/2021 13.3 °C / 10 °C 1.4 149.5
10/10/2021 24.9 °C / 13.3 °C 9.2 148.1
09/10/2021 27.5 °C / 12.1 °C 9.2 138.9
08/10/2021 19.2 °C / 10.2 °C 4.5 129.7
07/10/2021 31.1 °C / 10.4 °C 8.6 125.2
06/10/2021 24.4 °C / 6.5 °C 6.2 116.6
05/10/2021 18.7 °C / 9 °C 4.4 110.4
04/10/2021 26.3 °C / 14.8 °C 10 106
03/10/2021 24.7 °C / 9.7 °C 7.5 96.1
02/10/2021 21.3 °C / 11.6 °C 7 88.5
01/10/2021 27.2 °C / 16.3 °C 10.6 81.5
30/09/2021 21.6 °C / 15.2 °C 7.8 70.9
29/09/2021 18 °C / 13.4 °C 5.5 63
28/09/2021 20.1 °C / 10.1 °C 4.7 57.5
27/09/2021 14.8 °C / 10.4 °C 2.5 52.8
26/09/2021 15 °C / 8.8 °C 1.7 50.3
25/09/2021 19.2 °C / 10.3 °C 4.7 48.6
24/09/2021 26.6 °C / 10.4 °C 9.4 43.9
23/09/2021 25.2 °C / 7.3 °C 7 34.5
22/09/2021 18.5 °C / 4.9 °C 3.4 27.5
21/09/2021 14 °C / 5.1 °C 1.1 24.1
20/09/2021 25.6 °C / 8.8 °C 7.1 23.1
19/09/2021 22.8 °C / 7.6 °C 6 16
18/09/2021 29.1 °C / 13.2 °C 10 10