Ermelo climate — normals and trends
Ermelo (South Africa) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 14.4 °C and it receives 894 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 (17.9 °C on average) and the coldest is June (8.5 °C). Rainfall peaks in December.
Ermelo averages 8 frost days, 3 hot days (≥ 30 °C) and 115 rainy days per year.
Ermelo has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.9 °C (on 7 January 2016) and the coldest -5.8 °C (on 23 July 2021).
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
ErmeloMpumalanga
- coords
- -26.53°, 29.98°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.4°C
Average daily high
21.1°C
Average daily low
9.4°C
Annual rainfall
894mm
Sunshine / day
9.9h
Mean relative humidity
69%
Average peak wind
18.7km/h
Seasonal range
9.4°C
Frost days (< 0 °C)
8 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
115 d/yr
Annual snowfall
1.6 cm
Average feels-like high
19.8 °C
Average feels-like low
7.1 °C
Average peak gust
37.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
19.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.47 · 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
33.9 °C
7 January 2016
Coldest day
-5.8 °C
23 July 2021
Wettest day
116 mm
30 January 1984
Windiest day
52.0 km/h
23 September 1941
Strongest gust
99.7 km/h
30 August 2008
Hottest feels-like
35.2 °C
30 January 1983
Coldest feels-like
-10.5 °C
15 June 1956
Snowiest day
13.2 cm
10 September 1981
Sunniest day
13.7 h
14 December 1940
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 | 24.6 °C | +1.1 °C | 275 mm | +127 mm |
| Feb | 23.4 °C | +0.1 °C | 188 mm | +76 mm |
| Mar | 22.8 °C | +0.2 °C | 114 mm | +26 mm |
| Apr | 19.6 °C | -1.1 °C | 98 mm | +46 mm |
| May | 19.2 °C | +0.4 °C | 7 mm | -10 mm |
| Jun | 17.1 °C | +0.8 °C | 3 mm | -6 mm |
| Jul | 17.0 °C | +0.3 °C | 4 mm | -1 mm |
| Aug | 21.9 °C | +2.4 °C | 8 mm | -6 mm |
| Sep | 23.5 °C | +0.8 °C | 62 mm | +27 mm |
| Oct | 22.9 °C | -0.3 °C | 65 mm | -38 mm |
| Nov | 20.9 °C | -1.9 °C | 203 mm | +58 mm |
| Dec | 22.9 °C | -0.5 °C | 163 mm | -3 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 Ermelo?
Ermelo has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 14.4 °C and it receives 894 mm of precipitation per year.
What is the hottest day ever recorded in Ermelo?
The hottest day measured in Ermelo between 1940 and 2025 was 7 January 2016, reaching 33.9 °C.
What is the coldest day in Ermelo?
The coldest day measured in Ermelo between 1940 and 2025 was 23 July 2021, at -5.8 °C.
Does it snow in Ermelo?
Yes. Ermelo gets on average 1.6 cm of snow per year and has around 8 frost days.
Has the climate of Ermelo warmed?
Yes: Ermelo warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ermelo?
The wettest day measured in Ermelo between 1940 and 2025 was 30 January 1984, with 116 mm of rain in 24 hours.
What was the windiest day in Ermelo?
The windiest day measured in Ermelo between 1940 and 2025 was 23 September 1941, with winds reaching 52.0 km/h.
What is the warmest month in Ermelo?
The warmest month in Ermelo is January (17.9 °C on average); the coldest is June (8.5 °C).
How much does it rain in Ermelo?
Ermelo receives on average 894 mm of precipitation per year, spread over about 115 rainy days.
Is it sunny in Ermelo?
Ermelo gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ermelo?
The heaviest 24-hour snowfall measured in Ermelo between 1940 and 2025 was 10 September 1981, with 13.2 cm.
Are there tropical nights in Ermelo?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ermelo.
What was the most extreme apparent temperature in Ermelo?
In Ermelo, between 1940 and 2025, the highest apparent temperature reached 35.2 °C on 30 January 1983, and the lowest was -10.5 °C on 15 June 1956.
Compare Ermelo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ermelo