| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 28.4° | 15.1° | 59.8mm | 7.3 | 80 |
| February | 28.6° | 15.5° | 65mm | 8.5 | 77 |
| March | 27.5° | 14.3° | 35.3mm | 5.5 | 87 |
| April | 24.9° | 12.1° | 73.7mm | 7 | 86 |
| May | 22.9° | 9.7° | 23.5mm | 4.4 | 91 |
| June | 21.1° | 7.4° | 24.8mm | 2 | 96 |
| July | 20.7° | 7° | 11.9mm | 2 | 96 |
| August | 21.9° | 7.6° | 25.4mm | 3.7 | 93 |
| September | 22.7° | 8.7° | 42.6mm | 5 | 90 |
| October | 24.4° | 10.5° | 69.8mm | 5.3 | 89 |
| November | 25° | 11.8° | 86.9mm | 8.4 | 83 |
| December | 26.7° | 13.7° | 77.2mm | 10.5 | 79 |
January in Grahamstown averages a daily high of 28.4°C with nights around 15.1°C. Expect roughly 7.3 wet days totalling 59.8mm. Comfortable conditions for being outdoors all day.
February in Grahamstown averages a daily high of 28.6°C with nights around 15.5°C. Expect roughly 8.5 wet days totalling 65mm. Comfortable conditions for being outdoors all day.
March in Grahamstown averages a daily high of 27.5°C with nights around 14.3°C. Expect roughly 5.5 wet days totalling 35.3mm. Comfortable conditions for being outdoors all day.
April in Grahamstown averages a daily high of 24.9°C with nights around 12.1°C. Expect roughly 7 wet days totalling 73.7mm. Comfortable conditions for being outdoors all day.
May in Grahamstown averages a daily high of 22.9°C with nights around 9.7°C. Expect roughly 4.4 wet days totalling 23.5mm. Comfortable conditions for being outdoors all day.
June in Grahamstown averages a daily high of 21.1°C with nights around 7.4°C. Rain is rare — about 2 wet days and 24.8mm across the month. Comfortable conditions for being outdoors all day.
July in Grahamstown averages a daily high of 20.7°C with nights around 7°C. Rain is rare — about 2 wet days and 11.9mm across the month. Comfortable conditions for being outdoors all day.
August in Grahamstown averages a daily high of 21.9°C with nights around 7.6°C. Expect roughly 3.7 wet days totalling 25.4mm. Comfortable conditions for being outdoors all day.
September in Grahamstown averages a daily high of 22.7°C with nights around 8.7°C. Expect roughly 5 wet days totalling 42.6mm. Comfortable conditions for being outdoors all day.
October in Grahamstown averages a daily high of 24.4°C with nights around 10.5°C. Expect roughly 5.3 wet days totalling 69.8mm. Comfortable conditions for being outdoors all day.
November in Grahamstown averages a daily high of 25°C with nights around 11.8°C. Expect roughly 8.4 wet days totalling 86.9mm. Comfortable conditions for being outdoors all day.
December in Grahamstown averages a daily high of 26.7°C with nights around 13.7°C. Expect roughly 10.5 wet days totalling 77.2mm. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Grahamstown peaks at 96.
Based on 30 years of records, May–October scores highest for comfort in Grahamstown, balancing daytime temperature against rainfall.
February is the warmest, averaging a daily high of 28.6°C.
November is the wettest, averaging 86.9mm of rain across roughly 8.4 wet days.
July is the coolest month, with average daily highs around 20.7°C.