Cool Air, South Africa Climate
The warmest month is January, with an average high of 27°C; the coldest is July, with an average low of 8°C. A normal year brings 1226 mm of precipitation.
Temperature through the year
The normal daily high and low. The line marks today.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
Normals for Sep 27
- Normal high
- 25°C
- Normal low
- 12°C
- Reanalysis high
- 38°Cin 1995
- Reanalysis low
- 6°Cin 2017
- Chance of a wet day
- 45%
- Daylight
- 12 h 15 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Warmest | Coldest | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 27°C | 16°C | 38°C (1995) | 9°C (2001) | 192 mm | 24.9 |
| February | 27°C | 17°C | 37°C (2016) | 10°C (1994) | 161 mm | 21.2 |
| March | 26°C | 16°C | 38°C (2016) | 9°C (1992) | 126 mm | 19.5 |
| April | 24°C | 13°C | 37°C (2016) | 6°C (2000) | 71 mm | 11.5 |
| May | 23°C | 11°C | 33°C (2012) | 2°C (2007) | 29 mm | 5.2 |
| June | 21°C | 8°C | 31°C (2014) | 1°C (1994) | 19 mm | 3.2 |
| July | 21°C | 8°C | 30°C (2014) | 1°C (1995) | 31 mm | 4.1 |
| August | 23°C | 9°C | 35°C (2012) | 1°C (2003) | 31 mm | 5.5 |
| September | 25°C | 11°C | 38°C (1998) | 4°C (2006) | 67 mm | 10.0 |
| October | 25°C | 12°C | 41°C (2002) | 6°C (2017) | 141 mm | 18.9 |
| November | 26°C | 14°C | 40°C (2019) | 6°C (2002) | 164 mm | 22.2 |
| December | 27°C | 15°C | 39°C (2015) | 8°C (1994) | 194 mm | 25.9 |
| Year | 25°C | 12°C | 1226 mm | 172 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
1226 mm in a normal year, most in December.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Cool Air.
The muggiest month is February, when 36 percent of days are muggy or worse, with a mean dew point of 18°C or more.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | 17°C | 81% | 3% | 16% | 51% | 30% | 0% | 0% |
| February | 17°C | 82% | 3% | 15% | 46% | 35% | 1% | 0% |
| March | 16°C | 81% | 7% | 27% | 54% | 13% | 0% | 0% |
| April | 13°C | 78% | 42% | 43% | 14% | 1% | 0% | 0% |
| May | 9°C | 70% | 88% | 12% | 0% | 0% | 0% | 0% |
| June | 5°C | 64% | 99% | 1% | 0% | 0% | 0% | 0% |
| July | 5°C | 63% | 100% | 0% | 0% | 0% | 0% | 0% |
| August | 6°C | 64% | 99% | 1% | 0% | 0% | 0% | 0% |
| September | 9°C | 68% | 90% | 10% | 0% | 0% | 0% | 0% |
| October | 12°C | 74% | 57% | 36% | 7% | 0% | 0% | 0% |
| November | 14°C | 77% | 28% | 39% | 30% | 3% | 0% | 0% |
| December | 16°C | 80% | 7% | 29% | 47% | 16% | 0% | 0% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is July, with the sky 37 percent covered on average; the cloudiest is December, at 76 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is September, averaging 9.4 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Dec 17, with 14 h 02 min of daylight; the shortest is Jun 17, with 10 h 15 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in Cool Air in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
Where no station record is within reach, the extremes shown are the highest and lowest the reanalysis produced for the date in 1991-2020, not measured records.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Nearby
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-27. Sun and moon: computed with the NOAA solar equations and Meeus.