San Antonio Weather Forecast

Weather in the greater San Antonio metro is primarily the result of its nearness to the Gulf of Mexico 9150 miles to the southeast). This brings high humidity in summer and adds to the high temperatures the city experiences.

The city sees many afternoon thunderstorms and heavy rainfall in the region. Its location is an overlap of the humid subtropical climate of the Gulf Coast and the arid conditions of the Chihuahuan Desert to the west.

Prevailing wind patterns come primarily from the south and southeast, bringing warm, moist air from the Gulf of Mexico.
Mild winters and sunny days make San Antonio a great city to visit or call home.

7 Day Forecast for San Antonio:

SAN ANTONIO WEATHER

Seasonal Weather in San Antonio

Here’s a detailed overview of the average weather conditions in San Antonio, Texas, for each season, including temperature ranges, humidity, UV reports, precipitation, sunshine days, pollution, storms, winds, and the frequency of days with temperatures over 90 degrees Fahrenheit:

Winter (December to February):

• Temperature Range: Winters in San Antonio are mild. Highs typically range from 63°F (17°C) to 65°F (18°C), while nighttime lows range from 40°F (4°C) to 43°F (6°C).
• Humidity: Humidity levels are moderate in winter, resulting in comfortable conditions.
• UV Reports: UV levels are lower in winter, but sun protection is still advisable on sunny days.
• Precipitation: Winter is relatively dry in San Antonio, with average monthly rainfall ranging from minimal to around 2 inches. Snowfall is rare.
• Sunshine Days: San Antonio experiences a good amount of sunshine in winter.
• Air Quality/Pollution: Air quality remains generally good in winter, with minimal pollution.
• Storms: Significant winter storms are rare, and the region generally experiences calm weather during this season
  Winds: Breezy conditions may occur.
• Days Over 90 Degrees: Days over 90 degrees Fahrenheit are extremely rare in winter in San Antonio.

Spring (March to May):

• Temperature Range: Spring in San Antonio is pleasant and gradually warms up. Highs typically range from 73°F (23°C) in March to 85°F (29°C) in May, while nighttime lows range from 50°F (10°C) to 64°F (18°C).
• Humidity: Humidity levels are moderate in spring, creating comfortable conditions.
• UV Reports: UV levels begin to increase in spring, so sun protection is advisable on sunny days.
• Precipitation: Spring is relatively dry, with average monthly rainfall ranging from 2 to 3 inches.
• Sunshine Days: San Antonio experiences a good amount of sunshine in spring.
• Air Quality/Pollution: Air quality is generally good in spring, with minimal pollution.
• Storms: Spring can bring occasional thunderstorms, but severe storms are infrequent.
  Winds: Breezy conditions may occur.
• Days Over 90 Degrees: Days over 90 degrees Fahrenheit are rare in spring, with pleasant and mild temperatures.

Summer (June to August):

• Temperature Range: Summers in San Antonio are hot and humid. Highs typically range from 91°F (33°C) to 97°F (36°C), with nighttime lows between 71°F (22°C) and 76°F (24°C).
• Humidity: Humidity levels are high during the summer, contributing to hot and muggy conditions.
• UV Reports: UV levels are very high in summer, requiring strong sun protection.
• Precipitation: Summer is the wettest season in San Antonio, with average monthly rainfall ranging from 3 to 4 inches. Afternoon thunderstorms are common.
• Sunshine Days: While there are sunny days, summer also brings a higher chance of overcast conditions due to afternoon thunderstorms.
• Air Quality/Pollution: Air quality remains generally good in summer but may be impacted by localized pollution from urban areas.
• Storms: San Antonio experiences frequent afternoon thunderstorms in the summer, often producing heavy rainfall and lightning.
• Winds: Breezy conditions continue, especially in stormy weather.
• Days Over 90 Degrees: Days over 90 degrees Fahrenheit are common in summer in San Antonio, making it a hot and occasionally very hot season.

Fall (September to November):

• Temperature Range: Fall in San Antonio is warm and pleasant. Highs range from 88°F (31°C) in September to 73°F (23°C) in November, while nighttime lows range from 64°F (18°C) to 49°F (9°C).
• Humidity: Humidity levels decrease in the fall, creating comfortable weather.
• UV Reports: UV levels decrease in the fall, but sun protection is still advisable on sunny days.
• Precipitation: Fall is moderately dry, with average monthly rainfall ranging from 2 to 3 inches.
• Sunshine Days: Fall offers a good amount of sunshine, making it a pleasant time for outdoor activities.
• Air Quality/Pollution: Air quality is generally good in the fall, with minimal pollution.
• Storms: Fall can bring occasional rain showers, but severe storms are rare.
• Winds: Breezy conditions may occur.
• Days Over 90 Degrees: Days over 90 degrees Fahrenheit become rare in fall, with mild and comfortable temperatures.

San Antonio’s weather offers residents and visitors a range of experiences throughout the year, from mild springs and hot summers to pleasant autumns and mild winters.

 

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