Ermelo climate
Ermelo (South Africa) has a subtropical highland (dry winter) climate (Köppen Cwb). The average temperature over the year is 15 °C59 °F, and about 796 mm31 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Ermelo climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 2678 | 1355 | 1966 | 1485.8 | 0 |
| Feb | 2578 | 1254 | 1966 | 1024.0 | 0 |
| Mar | 2476 | 1151 | 1864 | 893.5 | 0 |
| Apr | 2271 | 846 | 1558 | 552.2 | 0 |
| May | 1966 | 439 | 1152 | 140.5 | 2 |
| Jun | 1661 | 033 | 847 | 90.3 | 7 |
| Jul | 1661 | 032 | 847 | 90.4 | 9 |
| Aug | 2068 | 337 | 1153 | 130.5 | 4 |
| Sep | 2576 | 643 | 1560 | 261.0 | 0 |
| Oct | 2679 | 949 | 1864 | 773.0 | 0 |
| Nov | 2679 | 1152 | 1865 | 1144.5 | 0 |
| Dec | 2679 | 1254 | 1967 | 1405.5 | 0 |
| Year | 2679 | 032 | 1559 | 79631 | 21 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 73% | 65% | 6.6 | 13:38 |
| Feb | 73% | 62% | 6.3 | 13:02 |
| Mar | 72% | 57% | 5.5 | 12:19 |
| Apr | 71% | 50% | 4.7 | 11:30 |
| May | 63% | 34% | 4.3 | 10:50 |
| Jun | 63% | 31% | 3.9 | 10:29 |
| Jul | 58% | 26% | 4.3 | 10:37 |
| Aug | 53% | 29% | 5.0 | 11:11 |
| Sep | 49% | 34% | 5.9 | 11:59 |
| Oct | 58% | 52% | 6.2 | 12:46 |
| Nov | 65% | 62% | 6.6 | 13:28 |
| Dec | 70% | 69% | 6.7 | 13:48 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Ermelo is like
The warmest month is December, with an average high of 26 °C79 °F and a low of 12 °C54 °F. The coldest is July, when highs average 16 °C61 °F and lows 0 °C32 °F. There is a clear seasonal cycle, with 11.2 °C20.1 °F between the average temperature of the warmest and the coolest month.
Annual precipitation is moderate at about 796 mm31 in. The wettest three-month stretch is November–January, which brings 51% of the annual total. Months with less than 20 mm0.8 in on average: May–August. The wettest month is January (148 mm5.8 in), the driest is June (9 mm0.3 in).
Relative humidity ranges from 49% in September to 73% in January. The clearest skies (lowest average cloud amount, 26%) are typical of July. Average wind speed near the ground ranges from 7 km/h (5 mph) in April to 11 km/h (7 mph) in September. Daylight lasts from about 10.5 hours in June to 13.8 hours in December.
Best time to visit Ermelo
Based on these averages, the most comfortable months for sightseeing and outdoor activities are March–May and August–October: average highs of 19 °C66 °F to 26 °C79 °F with 13 mm0.5 in to 89 mm3.5 in of precipitation per month.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Ermelo
- Summer (December–February) — highs 2578 to 26 °C79 °F, lows 1254 to 13 °C55 °F, about 130 mm5.1 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
- Autumn (March–May) — highs 1966 to 24 °C76 °F, lows 439 to 11 °C51 °F, about 52 mm2.1 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Winter (June–August) — highs 1661 to 20 °C68 °F, lows 032 to 3 °C37 °F, about 10 mm0.4 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Spring (September–November) — highs 2576 to 26 °C79 °F, lows 643 to 11 °C52 °F, about 72 mm2.8 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How Ermelo compares
Compared with Standerton, about 86 km to the southwest, Ermelo is on average 1.2 °C2.1 °F cooler and receives 23% more precipitation (796 mm31 in vs 649 mm26 in). The difference is largest in February (1.7 °C3.1 °F cooler).
Of the 49 places in South Africa covered by World Climates, Ermelo is the 49th warmest by annual mean temperature and the 7th wettest by annual precipitation. See all of them on the South Africa climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Dali (China, Cwb), Maseru (Lesotho, Cwa) and Qujing (China, Cwb).
Nearby places
- Standerton 86 km · 16 °C61 °F · 649 mm26 in
- eMbalenhle 91 km · 16 °C61 °F · 639 mm25 in
- Emalahleni 105 km · 16 °C61 °F · 656 mm26 in
- Newcastle 136 km · 18 °C65 °F · 747 mm29 in
- Manzini 139 km · 21 °C70 °F · 735 mm29 in
- Nigel 150 km · 17 °C62 °F · 619 mm24 in
- Mbombela 153 km · 21 °C70 °F · 685 mm27 in
- Etwatwa 159 km · 17 °C62 °F · 626 mm25 in
Frequently asked questions
What is the warmest month in Ermelo?
December is the warmest month in Ermelo, with an average high of 26 °C (79 °F) and an average low of 12 °C (54 °F).
What is the coldest month in Ermelo?
July is the coldest month, with an average high of 16 °C (61 °F) and an average low of 0 °C (32 °F).
When does it rain the most in Ermelo?
January is the wettest month with about 148 mm (5.8 in) of precipitation; June is the driest with about 9 mm (0.3 in).
What is the best time to visit Ermelo?
Judging by long-term averages, the most comfortable months are March–May and August–October.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.