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I-45 Interstate Road Conditions
I-45 Road Conditions & Weather
Radar and live pavement conditions along I-45 in Texas — plus closures, road work and city-by-city weather along the route.
Updated Oct 9, 2026 1:33 AM UTC · Mostly dry
Lowest 82°F near Houston, Texas · Highest wind 10 mph near Houston, Texas
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Interstate 45 (I-45) runs from Galveston, Texas, to Dallas, Texas, providing an intrastate north–south route entirely within the state. It passes through cities such as Galveston, Houston, Conroe, Huntsville, and Dallas.
- Road system: Interstate Highway System
- Year of construction: 1957
- Length: 285 miles
Weather data from Oct 9, 2026 1:33 AM UTC
82°F
87°F
10 mph
29.87-29.93 inHg
Current I-45 Conditions by State
Texas road conditions & Texas 511
Dry
- Houston 87°F · 7 mph wind · Dry
- Dallas 86°F · 1 mph wind · Dry
Measured end to end, I-45 runs 284 miles south to north from Galveston, Texas to Dallas, Texas, entirely inside Texas.
| State | Miles | Cities and mile markers |
|---|---|---|
| Texas | 284 | Houston 46 · Dallas 284 |
Mile markers count from each state's southern line and start again at the next one, which is how most states number their exits as well. They are measured along the same road geometry these pages draw, so they land within a mile or two of the posted markers. A toll road that runs its own continuous numbering is the exception — on the New York Thruway the posts continue from New York City — and there the figure is how far into the state the place is rather than the number on the sign. Distances are measured state by state, never across a gap.
No full closures are reported on I-45 as of Oct 9, 2026 1:33 AM UTC, and no lane closures or roadworks either. Always check with the responsible state DOT before setting off.
Texas I-45 weather conditions
Summaries fetched Oct 8, 2026 12:08 PM UTC
Houston, TX weather
- The current weather in Houston, TX, shows clear skies with a temperature of 75°F and a humidity level of 85%
- The wind is blowing from the east at 2 mph, providing a light breeze
- The atmospheric pressure is measured at 29.9 inHg
- Visibility is good at 9.9 miles
- There are no significant weather alerts or precipitation expected at this time.
Dallas, TX weather
- In Dallas, TX, the current weather is clear with a temperature of 64°F and a dew point of 56°F
- The humidity is at 77%, indicating a moderately humid atmosphere
- Winds are calm, blowing from the north-northwest at about 2 to 4 mph
- The atmospheric pressure is 30.06 inHg, contributing to stable weather conditions
- There is an active air quality alert in effect until 5:30 PM on October 8, 2026, which indicates a moderate risk related to air quality
- It is advisable to be cautious if engaging in outdoor activities during this alert period.
I-45 Road Weather FAQ
- Is I-45 closed right now?
- No full closures are reported on I-45. No lane closures or roadworks are reported either.
- What are I-45 road conditions today?
- The map on this page colors the route along I-45 by what is on the pavement right now — dry, wet, slush, snow or ice — from radar and surface data, last updated Oct 9, 2026 1:33 AM UTC. Right now temperatures run from 82°F to 87°F and the strongest wind is 10 mph.
- How long is Interstate 45, and which states does it cross?
- Measured end to end, I-45 runs 284 miles south to north, from Galveston, Texas to Dallas, Texas, entirely inside Texas. Mile markers restart at each state line, so Houston is around mile 46 in Texas.
- How often are I-45 road conditions updated?
- The road surface and weather layers are rebuilt whenever this page is opened with data more than ten minutes old, and refreshed on a schedule in between, so nothing here is more than about two hours old even on a road nobody has looked at. Closures and road blocks are re-imported from the state 511 feeds every fifteen minutes, and the written state-by-state summaries are refreshed daily. Every section on this page carries the time its data was fetched.
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