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
January
Weather in January
Temperature
January, noted for its average high-temperature of 29.2°C (84.6°F) and an average low-temperature of 18.8°C (65.8°F), is considered the warmest month.Heat index
In January, the heat index is evaluated at a tropical 33°C (91.4°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.Heat index values are typically calculated for conditions of shade and a light breeze. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
In Castle Hill, the average relative humidity in January is 71%.Rainfall
In Castle Hill, in January, during 15.9 rainfall days, 59mm (2.32") of precipitation is typically accumulated. Throughout the year, there are 149.1 rainfall days, and 546mm (21.5") of precipitation is accumulated.Daylight
In Castle Hill, the average length of the day in January is 14h and 6min.On the first day of the month, sunrise is at 5:48 am and sunset at 8:09 pm. On the last day of January, sunrise is at 6:16 am and sunset at 8:02 pm AEDT.
Sunshine
In Castle Hill, the average sunshine in January is 8.2h.UV index
January, February, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.Note: In January, the UV index of 6 transforms into the following advice:
Ward off overexposure. Defence against solar harm is crucial. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest in Castle Hill?
How hot does it get in Castle Hill in January?
What is the average humidity in January in Castle Hill?
How much does it rain in Castle Hill in January?
What is the average length of the day in January in Castle Hill?
What time are sunrise and sunset in January in Castle Hill?
How many hours of sunshine does Castle Hill have in January?
What are the months with the highest UV index in Castle Hill?
What is the UV index intensity in January in Castle Hill?
Average temperature in January
Castle Hill, Australia
- Average high temperature in January: 29.2°C
The warmest month (with the highest average high temperature) is January (29.2°C).
The month with the lowest average high temperature is June (16.8°C).
- Average low temperature in January: 18.8°C
The month with the highest average low temperature is January (18.8°C).
The coldest month (with the lowest average low temperature) is July (8.1°C).
Average pressure in January
Castle Hill, Australia
- Average pressure in January: 1012.9mbar
The month with the highest atmospheric pressure is June (1021mbar).
The month with the lowest atmospheric pressure is January (1012.9mbar).
Average wind speed in January
Castle Hill, Australia
- Average wind speed in January: 10.1km/h
The windiest month (with the highest average wind speed) is December (10.2km/h).
The calmest month (with the lowest average wind speed) is April (8.8km/h).
Average humidity in January
Castle Hill, Australia
- Average humidity in January: 71%
The month with the highest relative humidity is June (76%).
The month with the lowest relative humidity is September (65%).
Average rainfall in January
Castle Hill, Australia
- Average rainfall in January: 59mm
The wettest month (with the highest rainfall) is February (87mm).
The driest month (with the least rainfall) is May (27mm).
Average rainfall days in January
Castle Hill, Australia
- Average rainfall days in January: 15.9 days
The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is August (7.9 days).
Average daylight in January /
Average sunshine in January
Castle Hill, Australia
- Average daylight in January: 14h and 1min
The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 10h and 0min).
- Average sunshine in January: 8h and 1min
The months with the most sunshine are November and December (Average sunshine: 9h and 24min).
The month with the least sunshine is June (Average sunshine: 5h and 48min).
Average sunshine days in January
Castle Hill, Australia
- Average sunshine days in January: 11.6 days
The month with the most sunshine days is August (21 days).
The month with the least sunshine days is February (10.4 days).
Average UV index in January
Castle Hill, Australia
- Average UV index in January: 6
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, July, August and September (UV index 4).
Average cloud cover in January
Castle Hill, Australia
- Average cloud cover in January: 43
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in January
Castle Hill, Australia
- Average visibility in January: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
