Annual mean 17°C · wettest around March · prevailing wind SW
Warmest
25.1 °C
Coldest
16.9 °C
Wettest
64%
Windiest
5.4 m/s
Prevailing
SW
4.3 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Grahamstown over the whole year is 17°C. January is the hottest month, with highs of about 25°C; July is the coldest, with lows of about 10°C. Grahamstown has no sharply defined rainy season: the chance of rain on a given day runs from 34% in August, the driest month, to 48% in March, the wettest. Winds in Grahamstown are highest in October, averaging 4.0 m/s (14 km/h), and lightest in May, at 3.3 m/s (12 km/h). The prevailing wind is from the SW. The clearest skies in Grahamstown come in July, when the sky is typically 38% covered; December is the cloudiest month, at 56%.
Month by month Grahamstown climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
25°C
17°C
24°C
44%
55%
3.9 m/s
64
38
40
February
24°C
17°C
23°C
44%
47%
3.7 m/s
68
34
44
March
23°C
17°C
22°C
48%
47%
3.5 m/s
71
29
49
April
21°C
14°C
19°C
42%
48%
3.5 m/s
68
15
65
May
20°C
12°C
17°C
45%
40%
3.3 m/s
66
7
75
June
18°C
11°C
14°C
36%
38%
3.8 m/s
43
1
77
July
17°C
10°C
13°C
36%
38%
3.9 m/s
37
0
74
August
18°C
10°C
14°C
34%
38%
3.9 m/s
43
2
73
September
19°C
11°C
16°C
45%
53%
3.8 m/s
53
5
74
October
21°C
13°C
18°C
45%
49%
4.0 m/s
60
12
67
November
22°C
14°C
20°C
42%
52%
3.9 m/s
68
16
63
December
23°C
16°C
22°C
38%
56%
3.8 m/s
71
27
52
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Grahamstown weather by season
Year round, Grahamstown has days of about 17°C at their warmest in July, its coolest month, and 25°C in January, its warmest; the coolest hours of the day run from 10°C to 17°C through the year, and the average temperature over the year is 17°C around the clock. Rain is most likely around March and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Grahamstown weather in winterJune to August
High 18°CLow 10°CRain 35%
Winter in Grahamstown has typical daily highs of about 18°C and lows of about 10°C, with a 35% chance of rain on a given day.
Grahamstown weather in springSeptember to November
High 20°CLow 13°CRain 44%
Spring in Grahamstown has typical daily highs of about 20°C and lows of about 13°C, with a 44% chance of rain on a given day.
Grahamstown weather in summerDecember to February
High 24°CLow 17°CRain 42%
Summer in Grahamstown has typical daily highs of about 24°C and lows of about 17°C, with a 42% chance of rain on a given day.
Grahamstown weather in autumnMarch to May
High 21°CLow 14°CRain 45%
Autumn in Grahamstown has typical daily highs of about 21°C and lows of about 14°C, with a 45% chance of rain on a given day.
When is the rainy season in Grahamstown?
Grahamstown has no sharply defined rainy season: the chance of rain on a given day runs from 34% in August, the driest month, to 48% in March, the wettest.
What time of year is Grahamstown windiest?
Winds in Grahamstown are highest in October, averaging 4.0 m/s (14 km/h), and lightest in May, at 3.3 m/s (12 km/h). The prevailing wind is from the SW.
What is the average temperature in Grahamstown year round?
The average temperature in Grahamstown over the whole year is 17°C. January is the hottest month, with highs of about 25°C; July is the coldest, with lows of about 10°C.