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 snowfall in January
- Average snowfall 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
January stands out as Rockwall's coldest month, with temperatures ranging between an average high of 54°F (12.2°C) and a low of 38.5°F (3.6°C).Humidity
In Rockwall, the average relative humidity in January is 69%.Rainfall
January is the month with the least rainfall. Rain falls for 7.8 days and accumulates 1.81" (46mm) of precipitation.Snowfall
January, February and November are months with snowfall in Rockwall, Texas. January is the first month it typically snows. Throughout January, in the average 0.4 snowfall days, it receives 0.2" (5mm) of snow. In Rockwall, during the entire year, snow falls for 2.2 days and aggregates up to 1.18" (30mm) of snow.Daylight
The average length of the day in January is 10h and 16min.On the first day of January, sunrise is at 7:28 am and sunset at 5:30 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:56 pm CST.
Sunshine
In Rockwall, the average sunshine in January is 5.7h.UV index
January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The UV index of 3 during January translates into the following guidance:
Act with care - The suggestion to avoid sunburn is emphasized. To guard against the harmful effects of the Sun, minimize exposure during midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
What are the temperatures in January?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
When does it start snowing?
What is the average length of the day in January?
When are sunrise and sunset in January?
How many hours of sunshine does Rockwall have in January?
What is the month with the lowest UV index in Rockwall?
What is the UV index intensity in January?
Average temperature in January
Rockwall, TX
- Average high temperature in January: 54°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (54°F).
- Average low temperature in January: 38.5°F
The months with the highest average low temperature are July and August (74.8°F).
The coldest month (with the lowest average low temperature) is January (38.5°F).
Average pressure in January
Rockwall, TX
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Rockwall, TX
- Average wind speed in January: 9mph
The windiest month (with the highest average wind speed) is March (9.6mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity in January
Rockwall, TX
- Average humidity in January: 69%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (60%).
Average rainfall in January
Rockwall, TX
- Average rainfall in January: 1.81"
The wettest month (with the highest rainfall) is October (4.21").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in January
Rockwall, TX
- Average rainfall days in January: 7.8 days
The month with the highest number of rainy days is September (15.2 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in January
Rockwall, TX
- Average snowfall in January: 0.2"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are March, April, May, June, July, August, September, October and December (0").
Average snowfall days in January
Rockwall, TX
- Average snowfall days in January: 0.4 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Rockwall, TX
- Average daylight in January: 10h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January: 5h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in January
Rockwall, TX
- Average sunshine days in January: 21.4 days
The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is September (13.4 days).
Average UV index in January
Rockwall, TX
- Average UV index in January: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in January
Rockwall, TX
- Average cloud cover in January: 34
The months with the most cloud cover are February and March (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in January
Rockwall, TX
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Rockwall, Texas, USA
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