Post Office Lake, MD Weather Forecast
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Post Office Lake Weather Forecast
| REST OF TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
| Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Sunny | Partly Cloudy | Sunny |
| Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C |
| POP: 70% | POP: 70% | POP: 40% | POP: 90% | POP: 70% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1055 PM EDT Wed Aug 19 2026 

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Post Office Lake Forecast Discussion
Issued: 857 PM EDT Wed Aug 19 2026
Key Messages
- 1) Shower and thunderstorm chances return on Thursday, with precipitation chances lingering Friday and Saturday.
- 2) Numerous showers and thunderstorms Saturday with lingering showers Sunday. Turning cooler and dry next week.
Discussion
... KEY MESSAGE 1...Shower and thunderstorm chances return on Thursday, with precipitation chances lingering Friday and Saturday.
While the afternoon stratocumulus deck has largely eroded with the loss of daytime heating, add...
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