What is the weather in san antonio in january
Executive summary
San Antonio’s January climate is mild compared with much of the U.S.: typical daytime highs cluster around the low-to-mid 60s °F (about 64°F/18°C) and overnight lows near the low 40s °F (about 40–41°F/5°C) [1] [2]. January is the coldest month, often the cloudiest and one of the driest months, with occasional freezes or rare snow — but extended hard freezes are uncommon [3] [4] [5].
1. Winter in the Alamo City: what “cold” means here
San Antonio’s January is the city’s coolest month, yet “cold” is relative: average highs sit around 63–65°F and lows around 40–41°F, which most reporting outlets describe as moderately chilly rather than severe cold [6] [1] [2]. Climate-to-Travel aggregates the monthly mean at about 52°F (11.2°C) for January, reinforcing that the month is cool but far from frigid by northern-U.S. standards [5].
2. Cloud cover, sun and dryness — the sky story
January is often one of the cloudier months; WeatherSpark estimates San Antonio is overcast or mostly cloudy roughly 45% of the time in January [6]. Visitors still usually see several hours of sunshine daily — climate-data reporting shows roughly 6–9 hours of sun on average across the month — and local tourism messaging highlights the region’s overall high sunshine totals year-round [7] [8].
3. Precipitation and the chance of wintry precipitation
January tends to be relatively dry. Long-term station-based summaries describe the month as one of the driest for San Antonio, with precipitation varying year to year but generally modest totals [3]. The National Weather Service warns that cloudy spells can keep highs below 50°F on some days, and while freezes can occur (including occasional hard freezes regionwide), icy or snowy events are rare [4].
4. Temperature swings and occasional extremes
While averages are mild, historical records show the potential for brief cold snaps: Climate-to-Travel notes that rare cold waves have produced temperatures far below normal (records cited include extreme lows in past decades), so short-lived dips to freezing or below are possible though uncommon [5]. Thus packing for layers is sensible: daytime sweater or light jacket, warmer layers for nights and any unusually cold days [1].
5. What the forecasts mean for travelers and locals
Practical guidance from Visit San Antonio and local climatology: plan for cool mornings and evenings, milder afternoons, and generally dry conditions but keep an eye on short-term forecasts before travel because freezes or short cold events can change local conditions quickly [8] [4]. For outdoor plans expect comfortable daytime weather most days, but have alternatives for overcast or cooler periods [3].
6. Sources, limitations and competing emphases
Available reporting presents a consistent central picture: averages around high 60s–low 60s/40°F lows [6] [1] [2] with caveats about occasional freezes and rare snow [4] [5]. Differences among sources are small and largely stylistic — some phrase January as “moderately chilly and breezy” [1], others emphasize it as the coldest month but still comfortable [3]. No source in the provided set offers a day-by-day forecast for a specific January year; the items are monthly averages and climatological summaries [9] [10].
7. Bottom line for planning
Expect generally mild, cool January weather in San Antonio: average highs in the low-to-mid 60s and lows around 40–41°F, with a fair chance of clouds, modest precipitation, and only rare wintry storms — but brief freezes can happen so dress in layers and check a short-term forecast before departure [1] [6] [4].