Cloud-Covered and Comfortable: San Antonio’s High Humidity Monday Outlook

A Gray Start to the Work Week

San Antonio residents waking up this Monday, March 9, 2026, will find a thick blanket of clouds and significant moisture in the air. As the city kicks off the second week of March, the weather story is defined by high humidity levels and persistent overcast conditions. While the sun may struggle to break through the cloud deck, the temperatures remain quite mild, offering a comfortable, albeit damp, start to the day. For those heading out on the morning commute, the air will feel particularly heavy as humidity levels hover between 87% and 97%, creating a misty atmosphere across the metro area.

Morning Forecast: Overcast and Damp

The early morning hours will see temperatures sitting at a steady 62°F to 63°F. Early risers should be prepared for potential morning mist and very high dew points. Although the chance of measurable precipitation remains low during the morning hours—estimated at around 10% to 20%—the dense cloud cover will make it feel like a much darker start to the day than usual. Local residents should plan for damp sidewalks and reduced visibility in low-lying areas during the first few hours of daylight.

Afternoon Highs and Peak Conditions

As we transition into the afternoon, San Antonio will experience a gradual rise in temperature despite the lack of direct sunlight. Highs are expected to reach between 76°F and 80°F, making for a warm and muggy midday period. The wind will remain relatively light but consistent, blowing from the south at approximately 10 miles per hour, with occasional gusts reaching up to 14 miles per hour. While the UV index is rated at a moderate 6, the thick cloud cover will provide a natural shield for most of the day, though sun-sensitive individuals should still take standard precautions during any brief breaks in the overcast.

Evening Showers and Overnight Outlook

The evening hours bring an increased possibility of precipitation. Current predictions indicate that rain chances will climb as the sun sets, with some models suggesting a 55% chance of light showers by late evening. Temperatures will slowly descend back into the 63°F to 70°F range. This light rain is expected to persist into the night, though no significant accumulation or severe thunderstorms are anticipated at this time. It is a good night to keep the umbrella handy if you have late plans downtown or are walking the dog after dinner.

At a Glance: Today’s Weather Metrics

• High Temperature: 76°F - 80°F
• Low Temperature: 63°F - 70°F
• Humidity: Average 87% (Peaking at 97% in the morning)
• Precipitation: 20% during the day, increasing to 55% at night
• Wind Speed: 10-14 mph

Overall, Monday serves as a reminder of San Antonio’s humid spring transition. While no major weather warnings or wind advisories are currently in effect, the combination of high humidity and late-night rain chances suggests a gray and moist 24-hour period for the Alamo City.