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
The coldest period tends to be January, when average temperatures fluctuate between a high of 60.4°F (15.8°C) and a low of 44.2°F (6.8°C).Humidity
The average relative humidity in January is 73%.Rainfall
In January, the rain falls for 10.4 days. Throughout January, 1.5" (38mm) of precipitation is accumulated. In Rock Island, during the entire year, the rain falls for 163.7 days and collects up to 29.37" (746mm) of precipitation.Snowfall
January, February and December are months with snowfall. The months with the most snowfall in Rock Island, Texas, are January and December, with an average 0.12" (3mm) of accumulated snow.Daylight
In Rock Island, the average length of the day in January is 10h and 30min.On the first day of the month, sunrise is at 7:21 am and sunset at 5:38 pm. On the last day of January, sunrise is at 7:16 am and sunset at 6:03 pm CST.
Sunshine
The average sunshine in January is 5.5h.UV index
The average daily maximum UV index in January is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 4 in January transforms into the following instructions:
Undertake precautions - It is suggested to shield oneself from sunburn. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice 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 in Rock Island?
How many days does it rain in January?
When does it snow the most?
How much does it snow in January?
How many hours of daylight does Rock Island have in January?
When are sunrise and sunset in January?
How many hours of sunshine does Rock Island have in January?
What is the UV index intensity in January?
Average temperature in January
Rock Island, TX
- Average high temperature in January: 60.4°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in January: 44.2°F
The month with the highest average low temperature is August (75°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in January
Rock Island, 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 (29.92"Hg).
Average wind speed in January
Rock Island, TX
- Average wind speed in January: 8.1mph
The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest month (with the lowest average wind speed) is September (5.9mph).
Average humidity in January
Rock Island, TX
- Average humidity in January: 73%
The months with the highest relative humidity are March, May and June (78%).
The month with the lowest relative humidity is August (69%).
Average rainfall in January
Rock Island, TX
- Average rainfall in January: 1.5"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in January
Rock Island, TX
- Average rainfall days in January: 10.4 days
The month with the highest number of rainy days is September (18.3 days).
The month with the least rainy days is January (10.4 days).
Average snowfall in January
Rock Island, TX
- Average snowfall in January: 0.12"
The months with the highest snowfall are January and December (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in January
Rock Island, TX
- Average snowfall days in January: 0.4 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
Rock Island, TX
- Average daylight in January: 10h and 3min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in January: 5h and 3min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in January
Rock Island, TX
- Average sunshine days in January: 19.3 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is September (9.1 days).
Average UV index in January
Rock Island, TX
- Average UV index in January: 4
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in January
Rock Island, TX
- Average cloud cover in January: 40
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in January
Rock Island, TX
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, August, September, October, November and December (6mi).
The months with the lowest visibility are May, June and July (5mi).
Rock Island, Texas, USA
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