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Old Union, TX Weather Tomorrow

View tomorrow's local forecast for Old Union together with a detailed 5 day weather outlook showing precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the Old Union area and around Limestone county, Texas.
Updated: Sat Oct 17th 2026 10:45 PM CDT
Old Union, TX Weather – 10-17 – Sunny
68° / 48°
Sunny
Old Union, TX Weather – 10-18 – Sunny
73° / 49°

Weather Tomorrow

Sunny
Daytime highs will reach 73°F with lows dropping to 49°F in Old Union, where it will be sunny. There's a very small chance of rainfall, only about 3%. Winds will be light at 8mph and gusts of 16.6mph at 12 PM. Humidity levels should be comfortable, sitting around 43% on average, the maximum being 58% at 5 AM and 25% being its lowest at 3 PM. Barometric pressure is its highest of 30.39inHg at 9 AM, a lowest point of 30.22inHg at 5 PM with an avg 30.32inHg.
Old Union, TX Weather – 10-19 – Sunny
78° / 53°
Sunny
In Old Union, it will be sunny with highs near 78°F and lows around 53°F. There's a very small chance of rainfall, only about 5%. Winds will be light at 9mph and gusts of 13.9mph at 3 AM. Humidity levels should be comfortable, sitting around 48% on average, the maximum being 66% at 11 PM and 37% being its lowest at 11 AM. Barometric pressure is its highest of 30.27inHg at 12 AM, a lowest point of 30.13inHg at 5 PM with an avg 30.21inHg.
Old Union, TX Weather – 10-20 – Sunny
80° / 54°
Sunny
It will be sunny in Old Union, with a high of 80°F and a low of 54°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 9mph and gusts of 19.2mph at 5 PM. Humidity levels should be comfortable, sitting around 42% on average, the maximum being 65% at 12 AM and 20% being its lowest at 3 PM. Barometric pressure is its highest of 30.25inHg at 10 AM, a lowest point of 30.14inHg at 5 PM with an avg 30.19inHg.
Old Union, TX Weather – 10-21 – Sunny
83° / 56°
Sunny
Old Union is set for a sunny day with temperatures peaking at 83°F and dipping to 56°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 8mph and gusts of 18.3mph at 5 PM. Humidity levels should be comfortable, sitting around 42% on average, the maximum being 54% at 7 AM and 28% being its lowest at 5 PM. Barometric pressure is its highest of 30.25inHg at 9 AM, a lowest point of 30.12inHg at 5 PM with an avg 30.19inHg.
Old Union, TX Weather – 10-22 – Sunny
85° / 58°
Sunny
It will be sunny in Old Union, with a high of 85°F and a low of 58°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 7mph and gusts of 13.6mph at 4 PM. Humidity levels should be comfortable, sitting around 36% on average, the maximum being 51% at 8 AM and 19% being its lowest at 4 PM. Barometric pressure is its highest of 30.22inHg at 9 AM, a lowest point of 30.07inHg at 4 PM with an avg 30.15inHg.

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