Growing Degree Days

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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 USA calculations is 10°C, because it is the temperature when active growth begins for most organisms. However, in the UK’s cooler environments many turf managers use 6°C, occasionally 0°C is used as the base temperature. For more information on which base temperature best suits your turf management plan, please contact your local Syngenta contact.
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Growing Degree Days for Hong Kong
Total GDD for the date range of 03/17/2024 - 04/16/2024 : 1912.6
Date Temp: High / Low Daily GDD YTD GDD
16/04/2024 77.6 °F / 75.9 °F 66.8 5909.8
15/04/2024 77.7 °F / 74.6 °F 66.2 5843
14/04/2024 76.8 °F / 75.5 °F 66 5776.8
13/04/2024 76.3 °F / 72.9 °F 64.8 5710.7
12/04/2024 74.7 °F / 71.1 °F 62.7 5645.9
11/04/2024 72.4 °F / 69.9 °F 60.9 5583.2
10/04/2024 71 °F / 68.4 °F 59.4 5522.3
09/04/2024 75.1 °F / 69.5 °F 62.1 5462.9
08/04/2024 75.9 °F / 72.4 °F 63.6 5400.8
07/04/2024 73.5 °F / 71.5 °F 62 5337.2
06/04/2024 71.9 °F / 70.3 °F 60.8 5275.2
05/04/2024 74.9 °F / 71.9 °F 63.3 5214.4
04/04/2024 75.8 °F / 73.6 °F 65 5151.1
03/04/2024 75.7 °F / 74.8 °F 65.3 5086.1
02/04/2024 75.5 °F / 73.8 °F 64.6 5020.8
01/04/2024 75.5 °F / 74.5 °F 65 4956.1
31/03/2024 75.3 °F / 74.1 °F 64.5 4891.1
30/03/2024 74.4 °F / 72.9 °F 63.3 4826.6
29/03/2024 73.7 °F / 70.2 °F 61.2 4763.3
28/03/2024 72.5 °F / 68.1 °F 59.5 4702
27/03/2024 70.7 °F / 68.2 °F 59.4 4642.6
26/03/2024 74.8 °F / 70.6 °F 61.5 4583.1
25/03/2024 71.7 °F / 68.5 °F 60.2 4521.7
24/03/2024 71.8 °F / 69.8 °F 61.3 4461.4
23/03/2024 71.8 °F / 68.5 °F 59.7 4400.2
22/03/2024 69.3 °F / 67.7 °F 58.2 4340.4
21/03/2024 68.4 °F / 65 °F 55.9 4282.2
20/03/2024 67.7 °F / 66 °F 56.5 4226.3
19/03/2024 70.9 °F / 66.4 °F 58.1 4169.8
18/03/2024 68.3 °F / 65.6 °F 57.2 4111.8
17/03/2024 68.5 °F / 67 °F 57.4 4054.6

ERA5T (30 km)

ERA5T is the fifth generation ECMWF reanalysis for the global climate and weather historical data. The spatial resolution of the dataset is around 30km and it is available across global with lag time of 10 days. We gap fill the 10 days duration with numerical weather forecast model called NEMSGLOBAL.
ECMWF periodically uses its models and data assimilation systems to 'reanalyze' archived observations, creating global data sets describing the recent history of the atmosphere, land surface, and oceans.
Reanalysis combines model data with observations from across the world into a globally complete and consistent dataset using the laws of physics.

Weather historical data provided by meteoblue