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 month of January, characterized by an average high of 59.9°F (15.5°C) and a low of 42.8°F (6°C), is recognized as the coldest.Humidity
In January, the average relative humidity is 67%.Rainfall
In San Marcos, in January, during 9.4 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In San Marcos, during the entire year, the rain falls for 151.8 days and collects up to 26.89" (683mm) of precipitation.Snowfall
January, February and December are months with snowfall in San Marcos. The months with the most snowfall are January and February, with an average 0.12" (3mm) of accumulated snow.Daylight
In January, the average length of the day 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, in San Marcos, sunrise is at 7:22 am and sunset at 6:07 pm CST.
Sunshine
In January, the average sunshine in San Marcos is 6.2h.UV index
The average daily maximum UV index in January is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In January, a regular UV index of 4 translates into these guidelines:
Adopt protective measures - It is advised to guard against sun damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
What is the coldest time of year in San Marcos?
What are the temperatures in San Marcos in January?
What is the average humidity in January in San Marcos?
How much does it rain in San Marcos in January?
When does it snow the most in San Marcos?
How much does it snow in San Marcos in January?
What is the average length of the day in January in San Marcos?
What time are sunrise and sunset in January in San Marcos?
How long on average sun shines in January in San Marcos?
What is the UV index intensity in January in San Marcos?
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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