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Houston, TX Weather Forecast

View the 9-day weather forecast for Houston, Texas, including daily highs and lows, rain chances, rainfall amounts, wind speeds, humidity, and short-range versus extended BlendedModel guidance.

The latest 9-day BlendedModel forecast for Houston, Texas is in. The warmest stretch peaks on Thu near 91, while the coolest low settles in on Sat near 75. The best rain signal shows up on Sat at 85 percent and about 0.87 inches. The outlook starts with a near-term signal before shifting to extended signal later in the period.

Forecast data refreshed automatically every few hours. Showing the latest available BlendedModel forecast for Houston, Texas.

Last updated:

Latest BlendedModel forecast loaded for Houston, Texas.

About BlendedModel
BlendedModel is an experimental forecast system developed by Engineer.Guide Research and Development Lab. Forecast pages are refreshed automatically every few hours so you always see the latest guidance.

9-Day Outlook for Houston, Texas

A scan-first 9-day view generated for fast daily reading, with the main call for each day and the core details underneath.

Today's Weather Story
Today looks mostly cloudy with low rain chances, light wind, and humid air, and a low storm signal.
National Weather Service
Heat Advisory
Heat Advisory issued June 18 at 9:56AM CDT until June 20 at 10:00PM CDT by NWS Houston/Galveston TX
Moderate · Expected · Starts 2026-06-18T09:56:00-05:00 · Expires 2026-06-18T21:00:00-05:00
National Weather Service
Extreme Heat Warning
Extreme Heat Warning issued June 18 at 9:56AM CDT until June 18 at 8:00PM CDT by NWS Houston/Galveston TX
Severe · Expected · Starts 2026-06-18T09:56:00-05:00 · Expires 2026-06-18T21:00:00-05:00
National Weather Service
Heat Advisory
The Heat Advisory has been cancelled.
Minor · Past · Starts 2026-06-18T09:40:00-05:00 · Expires 2026-06-18T09:56:09-05:00
Check Hourly Timing
A quick look at the next several hours for temperature, rain chance, wind, and storm signal.
7 AM CDT
83°
Mostly Cloudy
Precip 0% · Wind 7 mph
Low Storm Signal · Near-Term Signal
8 AM CDT
84°
Sunny
Precip 0% · Wind 7 mph
Low Storm Signal · Near-Term Signal
9 AM CDT
85°
Mostly Cloudy
Precip 0% · Wind 8 mph
Low Storm Signal · Near-Term Signal
10 AM CDT
87°
Partly Cloudy
Precip 0% · Wind 7 mph
Low Storm Signal · Near-Term Signal
11 AM CDT
88°
Sunny
Precip 0% · Wind 7 mph
Low Storm Signal · Near-Term Signal
12 PM CDT
90°
Sunny
Precip 0% · Wind 7 mph
Low Storm Signal · Near-Term Signal
1 PM CDT
91°
Sunny
Precip 0% · Wind 8 mph
Low Storm Signal · Near-Term Signal
2 PM CDT
91°
Sunny
Precip 0% · Wind 8 mph
Low Storm Signal · Near-Term Signal
3 PM CDT
90°
Sunny
Precip 0% · Wind 9 mph
Low Storm Signal · Near-Term Signal
4 PM CDT
89°
Sunny
Precip 0% · Wind 10 mph
Low Storm Signal · Near-Term Signal
5 PM CDT
88°
Sunny
Precip 0% · Wind 9 mph
Low Storm Signal · Near-Term Signal
6 PM CDT
86°
Sunny
Precip 0% · Wind 8 mph
Low Storm Signal · Near-Term Signal
Thu
Jun 18
91°
Low 81°
Near-Term Signal
Mostly Cloudy
Precip 0% · Rain 0.00 in · Wind 10 mph · Humidity 93%
Thunder Index
24/100
Low Storm Signal
A 0-100 signal blending near-term storm ingredients with extended pattern guidance.
Storm Signal
Early guidance signal
Fri
Jun 19
90°
Low 80°
Near-Term Signal
Cloudy
Precip 0% · Rain 0.00 in · Wind 13 mph · Humidity 93%
Thunder Index
26/100
Low Storm Signal
Storm Signal
Early guidance signal
Sat
Jun 20
82°
Low 75°
Extended Signal
Steady rain likely
Precip 85% · Rain 0.87 in · Wind 5 mph · Humidity 92%
Thunder Index
77/100
Elevated Storm Signal
Storm Signal
Early guidance signal
Storm signal elevated - check timing and radar.
Check hourly timing Radar near Houston
Sun
Jun 21
87°
Low 78°
Extended Signal
Light rain possible
Precip 70% · Rain 0.44 in · Wind 11 mph · Humidity 93%
Thunder Index
54/100
Thunderstorm Possible
Storm Signal
Early guidance signal
Check hourly timing Radar near Houston
Mon
Jun 22
90°
Low 81°
Extended Signal
Humid
Precip 20% · Rain 0.02 in · Wind 11 mph · Humidity 91%
Thunder Index
23/100
Low Storm Signal
Storm Signal
Early guidance signal
Tue
Jun 23
90°
Low 80°
Extended Signal
Humid
Precip 20% · Rain 0.04 in · Wind 8 mph · Humidity 94%
Thunder Index
33/100
Low Storm Signal
Storm Signal
Early guidance signal
Wed
Jun 24
89°
Low 77°
Extended Signal
Humid
Precip 20% · Rain 0.03 in · Wind 6 mph · Humidity 96%
Thunder Index
29/100
Low Storm Signal
Storm Signal
Early guidance signal
Thu
Jun 25
90°
Low 77°
Extended Signal
Humid
Precip 20% · Rain 0.02 in · Wind 10 mph · Humidity 95%
Thunder Index
25/100
Low Storm Signal
Storm Signal
Early guidance signal
Fri
Jun 26
89°
Low 79°
Extended Signal
Humid
Precip 35% · Rain 0.07 in · Wind 10 mph · Humidity 89%
Thunder Index
34/100
Low Storm Signal
Storm Signal
Early guidance signal
Official alerts, when active, come from the National Weather Service.

Houston Weather Questions, Answered

Quick answers generated from the latest 9-day BlendedModel forecast for Houston, Texas.

Will it rain today in Houston?

Rain is unlikely in Houston, TX today, with only a 0 percent chance of precipitation.

How hot will it get in Houston today?

Today's forecast for Houston, TX calls for a high near 91 degrees and a low around 81 degrees.

Are thunderstorms expected in Houston this week?

Yes, the storm signal is elevated for Houston, TX this week. The strongest signal arrives on Sat with a Thunder Index of 77 out of 100.

What is the warmest day this week in Houston?

Thu looks like the warmest day in Houston, TX, with a high near 91 degrees.

Nearby Forecasts

Quick links to a few nearby cities if you want to compare the next 9 days around Houston, Texas.

Browse all BlendedModel pages