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Thembisa weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Thembisa?
For a warm holiday, the best week has been 15–21 January (Weather Index 95). Several start dates remain plausible, and the best timing varies between years. September to March are warmest (26°C), July and August are driest and August to March have the most sun.
- Warmest
- September to March 26°C
- Coolest
- June and July 19°C
- Driest
- July and August 2% rain-day chance
- Wettest
- December 54% rain-day chance
- Sunniest
- August to March 11 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Thembisa
Thembisa historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 26.5 | 15.9 | 45.5 | 14.1 | 129.9 | 11.5 |
| February | 26.1 | 16.0 | 51.8 | 14.5 | 124.9 | 10.8 |
| March | 25.6 | 14.5 | 32.6 | 10.1 | 73.6 | 10.7 |
| April | 22.9 | 11.4 | 24.3 | 7.3 | 67.8 | 9.9 |
| May | 21.3 | 7.6 | 8.7 | 2.7 | 18.6 | 9.8 |
| June | 19.0 | 4.5 | 4.0 | 1.2 | 5.3 | 9.8 |
| July | 19.0 | 4.2 | 1.9 | 0.6 | 3.6 | 10.0 |
| August | 22.2 | 7.0 | 2.3 | 0.7 | 3.0 | 10.6 |
| September | 25.8 | 10.6 | 10.0 | 3.0 | 13.1 | 11.3 |
| October | 26.4 | 12.6 | 24.2 | 7.5 | 52.3 | 11.2 |
| November | 26.1 | 14.2 | 44.7 | 13.4 | 88.4 | 11.2 |
| December | 26.1 | 15.6 | 53.5 | 16.6 | 125.2 | 11.0 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.