Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
As Rookdale transitions into January, the average high-temperature stands at a still moderately hot 29.2°C (84.6°F), offering little variation from the preceding month. Rookdale registers a significant drop in temperature in January, with average nighttime lows of 16°C (60.8°F).Heat index
In January, the average heat index is calculated to be a hot 33°C (91.4°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.Heat index readings emphasize conditions of light breezes and shaded spots. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Humidity
The average relative humidity in January is 70%.Rainfall
January is the month with the most rainfall in Rookdale. Rain falls for 20.8 days and accumulates 99mm (3.9") of precipitation.Daylight
In Rookdale, the average length of the day in January is 13h and 44min.On the first day of the month, sunrise is at 05:08 and sunset at 19:04. On the last day of January, in Rookdale, sunrise is at 05:32 and sunset at 19:00 SAST.
Sunshine
In Rookdale, the average sunshine in January is 10.8h.UV index
January, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 6 in January leads to these recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
How hot is January in Rookdale?
What is the average humidity in January in Rookdale?
What is the rainiest month in Rookdale?
How much does it rain in Rookdale in January?
How many hours of daylight does Rookdale have in January?
What time are sunrise and sunset in January in Rookdale?
How long on average sun shines in January in Rookdale?
What is the month with the highest UV index in Rookdale?
What is the UV index reading in January in Rookdale?
Average temperature in January
Rookdale, South Africa
- Average high temperature in January: 29.2°C
The warmest month (with the highest average high temperature) is December (29.3°C).
The month with the lowest average high temperature is June (19.7°C).
- Average low temperature in January: 16°C
The month with the highest average low temperature is January (16°C).
The coldest month (with the lowest average low temperature) is July (6.2°C).
Average pressure in January
Rookdale, South Africa
- Average pressure in January: 1015mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is December (1014.9mbar).
Average wind speed in January
Rookdale, South Africa
- Average wind speed in January: 7km/h
The windiest months (with the highest average wind speed) are October and November (8.9km/h).
The calmest month (with the lowest average wind speed) is May (6km/h).
Average humidity in January
Rookdale, South Africa
- Average humidity in January: 70%
The month with the highest relative humidity is February (73%).
The months with the lowest relative humidity are August and September (45%).
Average rainfall in January
Rookdale, South Africa
- Average rainfall in January: 99mm
The wettest month (with the highest rainfall) is January (99mm).
The driest month (with the least rainfall) is July (4mm).
Average rainfall days in January
Rookdale, South Africa
- Average rainfall days in January: 20.8 days
The month with the highest number of rainy days is December (22.5 days).
The month with the least rainy days is June (2.8 days).
Average daylight in January /
Average sunshine in January
Rookdale, South Africa
- Average daylight in January: 13h and 4min
The month with the longest days is December (Average daylight: 13h and 54min).
The month with the shortest days is June (Average daylight: 10h and 18min).
- Average sunshine in January: 10h and 5min
The month with the most sunshine is October (Average sunshine: 11h and 6min).
The month with the least sunshine is April (Average sunshine: 7h and 6min).
Average sunshine days in January
Rookdale, South Africa
- Average sunshine days in January: 5.8 days
The month with the most sunshine days is July (26.2 days).
The month with the least sunshine days is December (4.1 days).
Average UV index in January
Rookdale, South Africa
- Average UV index in January: 6
The months with the highest UV index are January, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in January
Rookdale, South Africa
- Average cloud cover in January: 36
The month with the most cloud cover is January (Cloud cover 36).
The months with the least cloud cover are June and July (Cloud cover 9).
Average visibility in January
Rookdale, South Africa
- Average visibility in January: 8km
The months with the highest visibility are May, June, July, August, September and October (10km).
The months with the lowest visibility are January and February (8km).
Rookdale, South Africa
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