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
With average high and low temperatures of 69.6°F (20.9°C) and 53.4°F (11.9°C) respectively, January is San Juan's coldest month.Humidity
In San Juan, the average relative humidity in January is 65%.Rainfall
The months with the least rainfall are January and February Rain falls for 6.3 days and accumulates 0.31" (8mm) of rain.Snowfall
The only month with snowfall is January. The month with the most snowfall is January, when snow falls for 0.1 days and typically aggregates up to 0.12" (3mm) of snow.Daylight
In San Juan, the average length of the day in January is 10h and 43min.On the first day of January, sunrise is at 7:20 am and sunset at 5:52 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 6:14 pm CST.
Sunshine
In San Juan, the average sunshine in January is 6.8h.UV index
In San Juan, the average daily maximum UV index in January is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In January, the UV index of 5 transforms into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
What is the average January temperature?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
What is the snowiest month?
When does it start snowing?
What is the average length of the day in January in San Juan?
When are sunrise and sunset in January?
How long on average sun shines in January?
What is the UV index intensity in January?
Average temperature in January
San Juan, TX
- Average high temperature in January: 69.6°F
The warmest month (with the highest average high temperature) is August (98.2°F).
The month with the lowest average high temperature is January (69.6°F).
- Average low temperature in January: 53.4°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (53.4°F).
Average pressure in January
San Juan, TX
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).
Average wind speed in January
San Juan, TX
- Average wind speed in January: 9.5mph
The windiest month (with the highest average wind speed) is May (12.4mph).
The calmest month (with the lowest average wind speed) is September (8.9mph).
Average humidity in January
San Juan, TX
- Average humidity in January: 65%
The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is August (59%).
Average rainfall in January
San Juan, TX
- Average rainfall in January: 0.31"
The wettest month (with the highest rainfall) is September (1.46").
The driest months (with the least rainfall) are January and February (0.31").
Average rainfall days in January
San Juan, TX
- Average rainfall days in January: 6.3 days
The month with the highest number of rainy days is September (15.1 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in January
San Juan, TX
- Average snowfall in January: 0.12"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in January
San Juan, TX
- Average snowfall days in January: 0.1 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in January /
Average sunshine in January
San Juan, TX
- Average daylight in January: 10h and 4min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in January: 6h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in January
San Juan, TX
- Average sunshine days in January: 22.5 days
The month with the most sunshine days is July (23 days).
The month with the least sunshine days is September (12.5 days).
Average UV index in January
San Juan, TX
- Average UV index in January: 5
The months with the highest UV index are July and August (UV index 8).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in January
San Juan, TX
- Average cloud cover in January: 37
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in January
San Juan, 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).
San Juan, Texas, USA
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