Growing degree days for Grahamstown

https://weatherspark.com/y/92833/Average-Weather-in-Grahamstown-South-Africa-Year-Round

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

0000 - 07/01
0100 - 07/20
0500 - 09/18
1000 - 11/10
1500 - 12/18
2000 - 01/15
2500 - 02/10
3000 - 03/15
3500 - 04/22
4000 - 06/10
4054 - 06/30

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 10°C and a cap of 30°C.

0000 C - 07/01
0050 C - 07/18
0250 C - 09/15
0500 C - 11/03
1000 C - 01/01
1500 C - 02/24
2000 C - 05/01
2252 C - 06/30