The app this map came from
Weather Navigation carries the same radar and road-surface data on Apple CarPlay and Android Auto, with a weather-aware route planner, storm-cell tracking and radar that refreshes every two minutes over the US.
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 17, 2026 6:43 AM UTC · Mostly dry
Lowest 55°F near Houston, Texas · Highest wind 21 mph near Houston, Texas
Use Weather Navigation for your next Road Trip
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 17, 2026 6:43 AM UTC
55°F
65°F
21 mph
30.30-30.50 inHg
Current I-45 Conditions by State
Texas road conditions & Texas 511
Dry
- Houston 63°F · 18 mph wind · Dry
- Dallas 56°F · 15 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 17, 2026 6:43 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 16, 2026 12:07 PM UTC
Houston, TX weather
- In Houston, TX, the current weather conditions indicate a temperature of 75°F with a high humidity level of 90%
- The wind is blowing from the north at a speed of 4.7 mph
- Visibility is good at 9.9 miles, and the sky is mostly cloudy with cloud coverage at 80%
- A wind advisory is currently in effect from 7:00 AM on October 16, 2026, until 1:00 AM on October 17, 2026, indicating that sustained winds or gusts may pose a risk
- There are no significant weather impacts for outdoor activities at this time.
Dallas, TX weather
- In Dallas, TX, the current weather conditions indicate a temperature of 60°F with light rain occurring
- The relative humidity is at 69%, and the pressure is 30.4 inHg
- Winds are coming from the north-northwest at 11 mph
- Visibility is good at 10 miles
- A wind advisory is currently in effect from 4:00 AM to 7:00 PM today, indicating potential hazards due to strong winds
- Although there are no significant impacts on outdoor activities reported at this time, caution is advised due to the advisory.
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 17, 2026 6:43 AM UTC. Right now temperatures run from 55°F to 65°F and the strongest wind is 21 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.
Weather Road Planner for car and mobile
The same live radar and road-surface data as this map, on your phone and on Apple CarPlay or Android Auto.
