Weather Alert
St John Weather Warning NWS WEATHER ALERT FOR THE ST JOHN, MD AREA - Issued: 417 PM EDT Fri Sep 4 2026 St John Weather Warning

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St John, MD Weather Forecast

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St John, MD Weather Forecast

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St John MD weather - Sunny - 87°F
Sunny
87°F
Updated 5:56 pm
Feels Like 95°F
Humidity 53%
Wind N/A N/A mph
Barometer  29.86 in
Dew Point 68°F
St John MD weather - Sunny - 31°C
Sunny
31°C
Updated 5:56 pm
Feels Like 35°C
Humidity 53%
Wind N/A 0 km/h
Barometer  101.1 kPa
Dew Point 20°C
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St John Weather Forecast

THIS AFTERNOON TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT LABOR DAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT
St John, MD Weather - This Afternoon Chance Of T-Storm St John, MD Weather - Tonight Chance Of T-Storm St John, MD Weather - Saturday Chance Of Showers St John, MD Weather - Saturday Night Partly Cloudy St John, MD Weather - Sunday Mostly Sunny St John, MD Weather - Sunday Night Partly Cloudy St John, MD Weather - Labor Day Sunny St John, MD Weather - Monday Night Mostly Clear St John, MD Weather - Tuesday Mostly Sunny St John, MD Weather - Tuesday Night Partly Cloudy St John, MD Weather - Wednesday Mostly Sunny St John, MD Weather - Wednesday Night Partly Cloudy
Chance of T-Storm Chance of T-Storm Chance of Showers Partly Cloudy Mostly Sunny Partly Cloudy Sunny Mostly Clear Mostly Sunny Partly Cloudy Mostly Sunny Partly Cloudy
Hi: 89°FHi: 32°C
 Lo: 69°FLo: 21°C Hi: 81°FHi: 27°C
 Lo: 60°FLo: 16°C Hi: 79°FHi: 26°C
 Lo: 59°FLo: 15°C Hi: 80°FHi: 27°C
 Lo: 59°FLo: 15°C Hi: 81°FHi: 27°C
 Lo: 61°FLo: 16°C Hi: 85°FHi: 29°C
 Lo: 70°FLo: 21°C
POP: 50% POP: 50% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 225 PM EDT Fri Sep 04 2026 St John, MD Weather - WeatherWorld.com

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Issued: 212 PM EDT Fri Sep 4 2026

Key Messages

  • 1) Hot temperatures, high humidity, and severe thunderstorm chances again today into Saturday.
  • 2) Drier conditions anticipated over the second half of Labor Day weekend and early next week.

Discussion

... KEY MESSAGE 1...Hot temperatures, high humidity, and severe thunderstorm chances again today into Saturday.

Mid/upper impulse paired with a notable low-level theta-e ridge/moisture plume is triggering scattered to numerous thunderstorms over WV into western MD and VA. Expect this to c...