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Weather for 78218 — San Antonio, TX

Conditions and forecast for the exact centre of ZIP code 78218 (29.497, -98.403), not a nearby airport.

65°

Overcast

Feels like:
65°
Humidity:
70%
Wind:
22 mph
Dew point:
55°

Source updated: 2:56:57 PM · WeatherSignal checked: 2:56:57 PM

Source: Open-Meteo (national weather-service models)

Next 12 hours in 78218

3 PM

66°

0%

4 PM

67°

0%

5 PM

69°

0%

6 PM

71°

0%

7 PM

72°

0%

8 PM

73°

0%

9 PM

72°

0%

10 PM

70°

0%

11 PM

69°

0%

12 AM

66°

0%

1 AM

64°

0%

2 AM

62°

0%

7 day forecast for 78218

  • Today

    73° / 65°

    0% rain · 23 mph wind

  • Saturday, Oct 17

    68° / 53°

    0% rain · 17 mph wind

  • Sunday, Oct 18

    72° / 52°

    0% rain · 9 mph wind

  • Monday, Oct 19

    73° / 53°

    0% rain · 5 mph wind

  • Tuesday, Oct 20

    77° / 63°

    0% rain · 4 mph wind

  • Wednesday, Oct 21

    79° / 62°

    0% rain · 5 mph wind

  • Thursday, Oct 22

    80° / 59°

    0% rain · 4 mph wind

About ZIP code 78218

78218 covers San Antonio in Texas. Forecasts on this page are generated for the coordinates at the centre of the ZIP code, so small differences from a nearby city forecast are expected and usually correct.

Closest cities with full forecast pages: San Antonio (7 mi), Austin (66 mi), Round Rock (82 mi), Killeen (119 mi).

Nearby ZIP codes

Severe weather warnings are issued by the National Weather Service for counties and polygons that may not line up with ZIP code boundaries. Always follow official warnings for your exact address.

Planning your week in San Antonio 78218, Texas

  • The warmest afternoon ahead is Thursday, reaching about 80°F.
  • The coldest night ahead dips to about 52°F.
  • This is a dry stretch — most days show rain chances under 20%, good for outdoor plans.
  • The breeziest day looks like today, with sustained wind near 23 mph.
  • UV reaches 7 on the sunniest day — sunscreen is worth it if you will be outside around midday.

Common questions about San Antonio 78218, Texas weather

How accurate is the San Antonio 78218, Texas forecast?
The next 48 hours are usually reliable on temperature and sky cover, with timing that can shift by an hour or two. Days three and four are dependable for the overall pattern. Beyond that, treat the numbers as a planning direction rather than a promise — we label confidence on every day so you can judge for yourself.
What is the best day this week in San Antonio 78218, Texas?
No day in the current outlook has a rain chance above 40%, so conditions look favorable for outdoor plans across the week.
Where does this forecast come from?
Forecast values come from national weather model data, and official warnings come from the National Weather Service. We show the source and the last-updated time on every page, and we never invent a number the source did not publish — missing measurements are hidden, not guessed.
How often is this page updated?
The forecast refreshes whenever the source model publishes new data, typically several times a day. The freshness note near the top of the page shows exactly when the numbers you are looking at were issued.

More weather for San Antonio 78218, Texas

Weather in nearby cities

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