Climate and monthly weather forecastWilliston, South Africa
Climate and monthly weather forecast
Weather in January
January, the same as December, is a moderately hot summer month in Williston, South Africa, with an average temperature varying between 16.8°C (62.2°F) and 29.1°C (84.4°F). January, with its average high-temperature of 29.1°C (84.4°F) and an average low-temperature of 16.8°C (62.2°F), holds the record as the warmest month. For January, the heat index is estimated at 29°C (84.2°F). Weather in January »Weather in February
The last month of the summer, February, is another warm month in Williston, South Africa, with an average temperature fluctuating between 28.3°C (82.9°F) and 16.8°C (62.2°F). With the advent of February, Williston's high-temperatures adjust to a still moderately hot 28.3°C (82.9°F), closely aligning with the preceding month. Weather in February »Weather in March
The first month of the autumn, March, is still a warm month in Williston, South Africa, with temperature in the range of an average low of 14.8°C (58.6°F) and an average high of 26.4°C (79.5°F). Williston's March average high-temperature settles at a still moderately hot 26.4°C (79.5°F), showing a near match with the preceding month. Weather in March »Weather in April
April, like March, is an agreeable autumn month in Williston, South Africa, with temperature in the range of an average low of 10.9°C (51.6°F) and an average high of 20.8°C (69.4°F). With April's onset, the weather shows a temperature decrease, transitioning from a moderately hot 26.4°C (79.5°F) in March to an agreeable 20.8°C (69.4°F). Weather in April »Weather in May
May, the last month of the autumn in Williston, is also an enjoyable month, with temperature in the range of an average low of 8.3°C (46.9°F) and an average high of 17.8°C (64°F). The onset of May brings a small shift in high-temperatures, falling from an agreeable 20.8°C (69.4°F) in April to an enjoyable 17.8°C (64°F). Weather in May »Weather in June
The first month of the winter, June, is still a refreshing month in Williston, South Africa, with an average temperature fluctuating between 4.5°C (40.1°F) and 13.2°C (55.8°F). The coldest temperatures occur during June, when averages reach a peak of 13.2°C (55.8°F) and a low of 4.5°C (40.1°F). Weather in June »Weather in July
July, the same as June, in Williston, South Africa, is another refreshing winter month, with an average temperature fluctuating between 3.9°C (39°F) and 13.4°C (56.1°F). The weather during July records an average high-temperature of a still refreshing 13.4°C (56.1°F), closely mirroring the preceding month. Weather in July »Weather in August
August, the last month of the winter in Williston, is another mild month, with an average temperature fluctuating between 4.7°C (40.5°F) and 15.4°C (59.7°F). With August's advent, Williston sees an average high-temperature of a still moderate 15.4°C (59.7°F), subtly shifted from July's 13.4°C (56.1°F). Weather in August »Weather in September
September, the first month of the spring in Williston, is an enjoyable month, with an average temperature fluctuating between 7.4°C (45.3°F) and 19.3°C (66.7°F). September sees a marginal temperature increase, moving from a mild 15.4°C (59.7°F) in August to a comfortable 19.3°C (66.7°F). Weather in September »Weather in October
October in Williston, South Africa, is an agreeable spring month, with temperature in the range of an average low of 10.5°C (50.9°F) and an average high of 22.4°C (72.3°F). October witnesses a subtle temperature ascent, adjusting from a refreshing 19.3°C (66.7°F) in September to a pleasant 22.4°C (72.3°F). Weather in October »Weather in November
The last month of the spring, November, is a moderately hot month in Williston, South Africa, with an average temperature fluctuating between 12.2°C (54°F) and 24.9°C (76.8°F). Transitioning from October to November, Williston observes an average high-temperature of a moderately hot 24.9°C (76.8°F), differing subtly from the previous month. Weather in November »Weather in December
December, the first month of the summer in Williston, is also a moderately hot month, with an average temperature fluctuating between 15.1°C (59.2°F) and 27.5°C (81.5°F). The transition from November to December sees an average high-temperature of a still warm 27.5°C (81.5°F), indicating a minor variance from the prior month. Weather in December »Updated: Aug 28, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Williston, the peak temperatures are generally noted in January, averaging a high of 29.1°C (84.4°F) and a low of 16.8°C (62.2°F).
January is the month with the most rainfall. Rain falls for 5.9 days and accumulates 21mm (0.83") of precipitation.
In Williston, during the entire year, the rain falls for 48.1 days and collects up to 112mm (4.41") of precipitation.
January through June, October through December are months without snowfall.
In Williston, during the entire year, snow aggregates up to 10mm (0.39").
January and November, with an average of 12h of sunshine, are months with the most sunshine.
The months with the highest UV index are January, February, November and December, with an average maximum UV index of 6.
The months with the lowest UV index are May through July, with an average maximum UV index of 3.
June is the coldest month, with an average high-temperature of 13.2°C (55.8°F) and an average low-temperature of 4.5°C (40.1°F).
With an average relative humidity of 57%, June is the most humid month.
June has the shortest days of the year, with an average of 10h and 6min of daylight.
With an average of 7.2h of sunshine, June has the least sunshine of the year.
Months with snowfall are July through September.
July is the month with the most snowfall. Snow falls for 0.8 days and accumulates 6mm (0.24") of snow.
The least humid month is November, with an average relative humidity of 36%.
The month with the least rainfall is November, when the rain falls for 2.6 days and typically collects 3mm (0.12") of precipitation.
With an average of 14h and 6min of daylight, December has the longest days of the year.
Williston does not observe Daylight Saving Time (DST). SAST timezone is used over the entire year.
Average temperature
Williston, South Africa
The warmest month (with the highest average high temperature) is January (29.1°C).
The month with the lowest average high temperature is June (13.2°C).
The months with the highest average low temperature are January and February (16.8°C).
The coldest month (with the lowest average low temperature) is July (3.9°C).
Average pressure
Williston, South Africa
- Average pressure in January:
1011.7mbar - Average pressure in February:
1012.2mbar - Average pressure in March:
1014.1mbar - Average pressure in April:
1017.9mbar - Average pressure in May:
1019.2mbar - Average pressure in June:
1021.8mbar
- Average pressure in July:
1023.4mbar - Average pressure in August:
1020.7mbar - Average pressure in September:
1018.5mbar - Average pressure in October:
1015.9mbar - Average pressure in November:
1013.8mbar - Average pressure in December:
1012.1mbar
The month with the highest atmospheric pressure is July (1023.4mbar).
The month with the lowest atmospheric pressure is January (1011.7mbar).
Average wind speed
Williston, South Africa
- Average wind speed in January:
17.5km/h - Average wind speed in February:
16.9km/h - Average wind speed in March:
15.8km/h - Average wind speed in April:
15.9km/h - Average wind speed in May:
16.5km/h - Average wind speed in June:
19.2km/h
- Average wind speed in July:
17.9km/h - Average wind speed in August:
18.4km/h - Average wind speed in September:
17.7km/h - Average wind speed in October:
17.9km/h - Average wind speed in November:
18.8km/h - Average wind speed in December:
17.9km/h
The windiest month (with the highest average wind speed) is June (19.2km/h).
The calmest month (with the lowest average wind speed) is March (15.8km/h).
Average humidity
Williston, South Africa
The month with the highest relative humidity is June (57%).
The month with the lowest relative humidity is November (36%).
Average rainfall
Williston, South Africa
The wettest month (with the highest rainfall) is January (21mm).
The driest month (with the least rainfall) is November (3mm).
Average rainfall days
Williston, South Africa
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
4.8 days - Average rainfall days in March:
5 days - Average rainfall days in April:
5.3 days - Average rainfall days in May:
3.3 days - Average rainfall days in June:
3.7 days
- Average rainfall days in July:
3.6 days - Average rainfall days in August:
2.9 days - Average rainfall days in September:
3.1 days - Average rainfall days in October:
3.8 days - Average rainfall days in November:
2.6 days - Average rainfall days in December:
4.1 days
The month with the highest number of rainy days is January (5.9 days).
The month with the least rainy days is November (2.6 days).
Average snowfall
Williston, South Africa
The month with the highest snowfall is July (6mm).
The months with the least snowfall are January, February, March, April, May, June, October, November and December (0mm).
Average snowfall days
Williston, South Africa
- Average snowfall days in January:
0 days - Average snowfall days in February:
0 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0.3 days
- Average snowfall days in July:
0.8 days - Average snowfall days in August:
0.5 days - Average snowfall days in September:
0.2 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is July (0.8 days).
The months with the least snowfall days are January, February, March, October, November and December (0 days).
Average daylight / Average sunshine
Williston, South Africa
- Average daylight in January:
13h and 54min - Average daylight in February:
13h and 12min - Average daylight in March:
12h and 18min - Average daylight in April:
11h and 18min - Average daylight in May:
10h and 30min - Average daylight in June:
10h and 6min
- Average daylight in July:
10h and 18min - Average daylight in August:
11h and 0min - Average daylight in September:
11h and 54min - Average daylight in October:
12h and 54min - Average daylight in November:
13h and 42min - Average daylight in December:
14h and 6min
The month with the longest days is December (Average daylight: 14h and 6min).
The month with the shortest days is June (Average daylight: 10h and 6min).
- Average sunshine in January:
12h and 0min - Average sunshine in February:
9h and 54min - Average sunshine in March:
9h and 42min - Average sunshine in April:
9h and 18min - Average sunshine in May:
7h and 18min - Average sunshine in June:
7h and 12min
- Average sunshine in July:
7h and 18min - Average sunshine in August:
9h and 12min - Average sunshine in September:
9h and 30min - Average sunshine in October:
11h and 6min - Average sunshine in November:
12h and 0min - Average sunshine in December:
11h and 54min
The months with the most sunshine are January and November (Average sunshine: 12h and 0min).
The month with the least sunshine is June (Average sunshine: 7h and 12min).
Average sunshine days
Williston, South Africa
- Average sunshine days in January:
23.8 days - Average sunshine days in February:
21.8 days - Average sunshine days in March:
24.9 days - Average sunshine days in April:
24.2 days - Average sunshine days in May:
27 days - Average sunshine days in June:
24.8 days
- Average sunshine days in July:
25.9 days - Average sunshine days in August:
26 days - Average sunshine days in September:
26 days - Average sunshine days in October:
26 days - Average sunshine days in November:
26.1 days - Average sunshine days in December:
26 days
The month with the most sunshine days is May (27 days).
The month with the least sunshine days is February (21.8 days).
Average UV index
Williston, South Africa
The months with the highest UV index are January, February, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 3).
Average cloud cover
Williston, South Africa
The month with the most cloud cover is June (Cloud cover 20).
The months with the least cloud cover are January, February and March (Cloud cover 10).
Average visibility
Williston, South Africa
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
