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Katy, TX Weather Tomorrow

Your Katy weather tomorrow forecast is paired with a detailed 5 day outlook featuring 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 across the Katy area and around Waller county, Texas.
Updated: Sun Sep 6th 2026 5:00 PM CDT
Katy, TX Weather – 9-6 – Overcast
87° / 79°
Overcast
Daytime highs will reach 87°F with lows dropping to 79°F in Katy, where it will be overcast. The chance of rain is 84% with an estimated 1.93in. Winds will be light at 8mph and gusts of 14.4mph at 10 PM. High humidity with average of 85% is anticipated, the maximum being 90% at 10 PM and 72% being its lowest at 11 PM. Barometric pressure is its highest of 29.87inHg at 10 PM, a lowest point of 29.85inHg at 6 PM with an avg 29.86inHg.
Katy, TX Weather – 9-7 – Sunny
95° / 78°

Weather Tomorrow

Sunny
In Katy, bright and sunny conditions with highs near 95°F and lows around 78°F. There's a moderate 36% chance of rainfall with an estimated 0.03in. Winds will be light at 9mph and gusts of 16.6mph at 3 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 84% at 6 AM and 46% being its lowest at 2 PM. Barometric pressure is its highest of 29.96inHg at 11 AM, a lowest point of 29.86inHg at 12 AM with an avg 29.9inHg.
Katy, TX Weather – 9-8 – Sunny
96° / 78°
Sunny
It will be sunny in Katy, with a high of 96°F and a low of 78°F. Rainfall predicted to have a 57% chance with an estimated 0.08in. Wind will be moderate, blowing around 12mph on average and gusts of 17.5mph at 6 PM. The humidity will be on the higher side, averaging about 67%, the maximum being 88% at 6 AM and 40% being its lowest at 4 PM. Barometric pressure is its highest of 30.05inHg at 11 PM, a lowest point of 29.93inHg at 12 AM with an avg 29.99inHg.
Katy, TX Weather – 9-9 – Sunny
96° / 77°
Sunny
Katy could see a sunny day with daytime highs of 96°F and nighttime lows near 77°F. There's a moderate 36% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 13mph on average and gusts of 19.1mph at 9 PM. The humidity will be on the higher side, averaging about 67%, the maximum being 88% at 7 AM and 39% being its lowest at 2 PM. Barometric pressure is its highest of 30.11inHg at 9 AM, a lowest point of 29.98inHg at 6 PM with an avg 30.04inHg.
Katy, TX Weather – 9-10 – Sunny
96° / 76°
Sunny
In Katy, bright and sunny conditions with highs near 96°F and lows around 76°F. Rainfall predicted to have a 71% chance with an estimated 0.45in. Wind will be moderate, blowing around 11mph on average and gusts of 21mph at 11 PM. The humidity will be on the higher side, averaging about 69%, the maximum being 92% at 7 AM and 41% being its lowest at 3 PM. Barometric pressure is its highest of 30.03inHg at 8 AM, a lowest point of 29.89inHg at 7 PM with an avg 29.97inHg.
Katy, TX Weather – 9-11 – Sunny
97° / 77°
Sunny
Bright and sunny conditions in Katy, with a high of 97°F and a low of 77°F. There's a moderate 36% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 13mph on average and gusts of 19.9mph at 10 PM. The humidity will be on the higher side, averaging about 67%, the maximum being 88% at 7 AM and 38% being its lowest at 4 PM. Barometric pressure is its highest of 29.97inHg at 10 AM, a lowest point of 29.85inHg at 5 PM with an avg 29.91inHg.

Currently

Moderate Rain 79°F
29.84 inHg.
Barometer
92%
Humidity
SSW 4.3 mph
Wind
Moderate Rain

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