San Antonio Weather in January
January in San Antonio brings moderate temperatures, with daytime highs of 16°C (61°F) and nights around 11°C (52°F). Expect around 34 mm (1.3 in) of rainfall during the month.
Rainfall in San Antonio in January
Typically, about 14 days will experience rainfall, with an average of 34 mm (1.3 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in San Antonio in January
Daytime temperatures in San Antonio reach 16°C (61°F) in January, dropping to 11°C (52°F) at night. January is part of the winter season. Conditions are often most pleasant around the middle of the day. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping. While this month has some of the cooler temperatures of the year, it's far from cold and remains pleasant.
Sunshine in San Antonio in January
You can expect a moderate amount of sunlight, with approximately 164 hours. This means a pleasant mix of sun and overcast.
Average water temperature in January
The water temperature is 15°C (59°F) — chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit San Antonio. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our San Antonio's climate page.
San Antonio Temperature in January
Min Temperature
11°C (52°F)
Max Temperature
16°C (61°F)
Water Temperature
15°C (59°F) *
Chance of Rain
45%
Precipitation
34 mm (1.3 in)
Rainy days
14 days
Humidity
75% *
Sunshine
164 hours *
Percentage Sunshine
52% *
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in San Antonio typically stay consistent throughout January, with daily highs averaging around 16°C (61°F). Nights are cool, with lows typically ranging from 7°C (45°F) to 9°C (48°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for San Antonio in January
Browse day-by-day weather records for San Antonio spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Antonio historical weather extremes in January
According to our 25 years of weather records for San Antonio, the following extremes were recorded between 2000 and 2025.
- San Antonio recorded its highest January temperature of 24°C (75°F) on January 29, 2021.
- The coldest January day was on January 26, 2005, with a maximum of 7°C (45°F).
- The lowest overnight temperature recorded in January was -1°C (30°F) (January 28, 2005).
Best Places in Spain in January
Find out more about the weather in Spain and which places have the best travel conditions in this month. See all of Spain in January →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in San Antonio in January
Pleasant temperatures in January mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Pack a light rain jacket or compact umbrella for occasional showers. The water temperature sits at about 15°C (59°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in San Antonio in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our San Antonio's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full San Antonio climate overview or explore weather in Spain.
