San Antonio’s Spring-Like Interlude: Warmth Today Before Arctic Blast Arrives

A Mild Reprieve for San Antonio

San Antonio residents can look forward to unseasonably warm conditions today, Thursday, January 22, 2026. As the city sits in a temporary atmospheric sweet spot, the local weather is providing a spring-like interlude with temperatures reaching well above the typical January averages. While a significant weather shift is looming on the horizon for the weekend, today serves as a calm reprieve, offering plenty of opportunities for outdoor activities before an Arctic front changes the landscape.

Morning: Foggy Start and Mild Temperatures

The day begins with a damp and overcast atmosphere. Early commuters should be prepared for patchy dense fog, which is expected to impact visibility across Bexar County between 5:00 a.m. and 9:00 a.m. Temperatures this morning are starting in the comfortable low to mid-50s, significantly warmer than the crisp mornings the region experienced earlier this week. Humidity remains high at approximately 82% during the morning hours, contributing to a muggy feel that will persist until the sun breaks through.

Afternoon: Clearing Skies and 73-Degree Peaks

As the morning fog dissipates, the thick cloud cover will begin to break up. By the afternoon, skies are predicted to become partly cloudy, allowing the sun to push temperatures up to a high of 73 degrees. This is roughly ten degrees above the historical average for late January in San Antonio. These mild conditions are driven by light southerly winds that are keeping the colder air masses at bay for at least one more day. It is an ideal afternoon for those looking to enjoy the city's parks or the River Walk before the weather turns harsh.

Evening and Overnight: The Approaching Front

Conditions will remain mild through the evening hours, though cloud cover is expected to increase once again after sunset. Overnight lows will hover around 57 degrees. While the day remains largely dry with only a 10% chance of precipitation, the probability of light rain increases to 20% late tonight. Local meteorologists are closely monitoring a major Arctic cold front currently positioned to the north; while it does not arrive today, it is forecast to bring a dramatic drop in temperature and potential icing conditions starting Friday night. Residents are advised to enjoy today’s warmth while preparing for the freeze ahead.

Daily Weather Summary

• High Temperature: 73°F
• Low Temperature: 57°F
• Humidity: High (approx. 72% average)
• Wind: Light south-southwest breeze
• Rain Chance: 10% daytime / 20% overnight
• Advisories: Patchy dense fog expected during the morning commute (5 a.m. – 9 a.m.).