Climate averages 1991–2020
Newcastle, South Africa weather
in May.
A mild, fairly dry month: the 10th warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Newcastle, South Africa: daytime highs average 20.7°C and nights cool to about 7.4°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 17 mm of rain on roughly 3 days, which makes May a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 46 min on an average May day.
The nearest other city in this atlas is Dundee, South Africa (54 km away). In May its highs average 20.9°C, about as warm as Newcastle, South Africa, with 18 mm of rain.
Among the 95 cities listed in South Africa, Newcastle, South Africa ranks joint 49th of 95 for the warmest May highs and joint 34th of 95 for the driest May (rainfall, lowest first). The mean May high of those 95 cities is 21.0°C; Newcastle, South Africa is 0.3°C cooler than that mean.
From May to June, average highs fall by 2.3°C to 18.4°C, and monthly rainfall falls from 17 mm to 10 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Newcastle, South Africa climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.1°C15.6°C | 15.6°C | 141 | 17.6 | 13.714 h |
| February | 26.1°C15.6°C | 15.6°C | 102 | 13.3 | 13.113 h |
| March | 24.9°C14.0°C | 14.0°C | 99 | 11.8 | 12.312 h |
| April | 22.6°C11.1°C | 11.1°C | 45 | 7.4 | 11.411 h |
| May, selected | 20.7°C7.4°C | 7.4°C | 17 | 2.9 | 10.811 h |
| June | 18.4°C4.4°C | 4.4°C | 10 | 2.2 | 10.410 h |
| July | 18.4°C3.8°C | 3.8°C | 13 | 2.1 | 10.611 h |
| August | 21.3°C6.3°C | 6.3°C | 22 | 3.9 | 11.111 h |
| September | 24.7°C9.7°C | 9.7°C | 40 | 7.0 | 11.912 h |
| October | 25.1°C11.8°C | 11.8°C | 94 | 13.7 | 12.713 h |
| November | 25.6°C13.4°C | 13.4°C | 120 | 16.5 | 13.513 h |
| December | 26.2°C15.0°C | 15.0°C | 155 | 18.9 | 13.914 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Dundee, South Africa in MaySouth Africa · 54 kmHigh 20.9°C · Low 8.7°C · 18 mm rain
- Vryheid in MaySouth Africa · 85 kmHigh 21.3°C · Low 8.1°C · 19 mm rain
- Ladysmith in MaySouth Africa · 90 kmHigh 21.8°C · Low 7.6°C · 21 mm rain
- Standerton in MaySouth Africa · 114 kmHigh 19.5°C · Low 6.0°C · 15 mm rain
- Piet Retief in MaySouth Africa · 121 kmHigh 20.2°C · Low 8.5°C · 18 mm rain
- Ermelo in MaySouth Africa · 136 kmHigh 18.5°C · Low 6.3°C · 15 mm rain
- Phuthaditjhaba in MaySouth Africa · 139 kmHigh 17.6°C · Low 4.3°C · 25 mm rain
- Bethal in MaySouth Africa · 152 kmHigh 19.0°C · Low 5.9°C · 15 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Newcastle) is explained once on the Newcastle, South Africa year overview and on the Sources, method and limits page.