Grabouw climate — normals and trends
Grabouw (South Africa) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 15.8 °C and it receives 596 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is January (19.6 °C on average) and the coldest is July (12.2 °C). Rainfall peaks in June.
Grabouw averages 0 frost days, 0 hot days (≥ 30 °C) and 93 rainy days per year.
Grabouw has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.6 °C (on 19 January 2000) and the coldest 4.0 °C (on 1 August 1967).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
GrabouwWestern Cape
- coords
- -34.15°, 19.02°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.8°C
Average daily high
18.8°C
Average daily low
13.5°C
Annual rainfall
596mm
Sunshine / day
10.8h
Mean relative humidity
77%
Average peak wind
20.9km/h
Seasonal range
7.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
93 d/yr
Annual snowfall
0.0 cm
Average feels-like high
18.2 °C
Average feels-like low
11.6 °C
Average peak gust
42.4 km/h
Tropical nights (≥ 20 °C)
2 d/yr
Solar radiation
18.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.58 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
32.6 °C
19 January 2000
Coldest day
4.0 °C
1 August 1967
Wettest day
99 mm
16 November 2013
Windiest day
60.9 km/h
20 November 1943
Strongest gust
139.7 km/h
15 May 1984
Hottest feels-like
35.8 °C
23 January 1979
Coldest feels-like
-0.3 °C
13 June 1944
Snowiest day
0.5 cm
19 August 2003
Sunniest day
14.2 h
9 December 1941
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 22.7 °C | 0.0 °C | 19 mm | -4 mm |
| Feb | 23.1 °C | +0.2 °C | 5 mm | -20 mm |
| Mar | 22.8 °C | +0.9 °C | 18 mm | -10 mm |
| Apr | 20.8 °C | +1.0 °C | 41 mm | -3 mm |
| May | 18.1 °C | +0.5 °C | 65 mm | -3 mm |
| Jun | 15.9 °C | 0.0 °C | 127 mm | +37 mm |
| Jul | 15.0 °C | 0.0 °C | 108 mm | +25 mm |
| Aug | 15.4 °C | +0.2 °C | 73 mm | -6 mm |
| Sep | 17.5 °C | +1.3 °C | 29 mm | -23 mm |
| Oct | 18.7 °C | +0.8 °C | 23 mm | -22 mm |
| Nov | 22.0 °C | +2.3 °C | 8 mm | -25 mm |
| Dec | 22.7 °C | +1.3 °C | 15 mm | -11 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Grabouw?
Grabouw has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 15.8 °C and it receives 596 mm of precipitation per year.
What is the hottest day ever recorded in Grabouw?
The hottest day measured in Grabouw between 1940 and 2025 was 19 January 2000, reaching 32.6 °C.
What is the coldest day in Grabouw?
The coldest day measured in Grabouw between 1940 and 2025 was 1 August 1967, at 4.0 °C.
Does it snow in Grabouw?
Almost never: Grabouw sees virtually no snow, with about 0 frost days per year.
Has the climate of Grabouw warmed?
Yes: Grabouw warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Grabouw?
The wettest day measured in Grabouw between 1940 and 2025 was 16 November 2013, with 99 mm of rain in 24 hours.
What was the windiest day in Grabouw?
The windiest day measured in Grabouw between 1940 and 2025 was 20 November 1943, with winds reaching 60.9 km/h.
What is the warmest month in Grabouw?
The warmest month in Grabouw is January (19.6 °C on average); the coldest is July (12.2 °C).
How much does it rain in Grabouw?
Grabouw receives on average 596 mm of precipitation per year, spread over about 93 rainy days.
Is it sunny in Grabouw?
Grabouw gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
What is the biggest single-day snowfall in Grabouw?
The heaviest 24-hour snowfall measured in Grabouw between 1940 and 2025 was 19 August 2003, with 0.5 cm.
Are there tropical nights in Grabouw?
Yes: Grabouw has on average 2 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Grabouw?
In Grabouw, between 1940 and 2025, the highest apparent temperature reached 35.8 °C on 23 January 1979, and the lowest was -0.3 °C on 13 June 1944.
Compare Grabouw with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Grabouw