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
San Marcos witnesses the coldest weather in January, with temperatures averaging a high of 59.9°F (15.5°C) and a low of 42.8°F (6°C).Humidity
The average relative humidity in January in San Marcos, Texas, is 67%.Rainfall
In San Marcos, during January, the rain falls for 9.4 days and regularly aggregates up to 1.38" (35mm) of precipitation. Throughout the year, there are 151.8 rainfall days, and 26.89" (683mm) of precipitation is accumulated.Snowfall
Months with snowfall are January, February and December. The months with the most snowfall are January and February, with an average 0.12" (3mm) of accumulated snow.Daylight
In San Marcos, the average length of the day in January is 10h and 29min.On the first day of the month, sunrise is at 7:27 am and sunset at 5:43 pm. On the last day of January, sunrise is at 7:22 am and sunset at 6:07 pm CST.
Sunshine
In San Marcos, the average sunshine in January is 6.2h.UV index
The average daily maximum UV index in January is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In January, a regular UV index of 4 translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
What is the average January temperature?
What is the average humidity in January?
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 San Marcos have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does San Marcos have in January?
How high is the UV index in January?
Average temperature in January
San Marcos, TX
- Average high temperature in January: 59.9°F
The warmest month (with the highest average high temperature) is August (95.9°F).
The month with the lowest average high temperature is January (59.9°F).
- Average low temperature in January: 42.8°F
The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).
Average pressure in January
San Marcos, TX
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in January
San Marcos, TX
- Average wind speed in January: 8.4mph
The windiest month (with the highest average wind speed) is February (9.1mph).
The calmest month (with the lowest average wind speed) is September (6.1mph).
Average humidity in January
San Marcos, TX
- Average humidity in January: 67%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (62%).
Average rainfall in January
San Marcos, TX
- Average rainfall in January: 1.38"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days in January
San Marcos, TX
- Average rainfall days in January: 9.4 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in January
San Marcos, TX
- Average snowfall in January: 0.12"
The months with the highest snowfall are January and February (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
San Marcos, TX
- Average snowfall days in January: 0.3 days
The months with the highest number of snowfall days are January and February (0.3 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
San Marcos, 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: 6h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in January
San Marcos, TX
- Average sunshine days in January: 19.4 days
The month with the most sunshine days is January (19.4 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in January
San Marcos, 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
San Marcos, TX
- Average cloud cover in January: 37
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in January
San Marcos, TX
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
San Marcos, Texas, USA
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