Old Union, MS Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Old Union Weather Forecast
| OVERNIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
| Partly Cloudy | Sunny | Patchy Fog | Sunny | Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Clear | Sunny |
| Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 91°FHi: 33°C | Lo: 59°FLo: 15°C | Hi: 91°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 91°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 91°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 126 AM CDT Sun Oct 11 2026 

Old Union Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Old Union Weather Map
Old Union Quick Facts
Old Union Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1043 PM CDT Sat Oct 10 2026
Key Messages
Issued at 1042 PM CDT Sat Oct 10 2026- Post-Tropical Cyclone Isaias continues to bring some light showers across the Tennessee River Valley, with any lingering moisture moving out by Sunday morning.
- Dry conditions will return to the Mid-South on Sunday and last through Tuesday. Well above-normal temperatures in the upper 80s to low 90s are expected through at least Thursday.
Discussion
... (Tonight through next Saturday) Issued at 1042 PM CDT Sat Oct 10 2026
Mostly cloudy conditions will...
Weather World