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I-45 Interstate Road Conditions
I-45 Road Conditions & Weather
Updated Aug 23, 2026 11:18 PM UTC · Mostly dry
Lowest 91°F near Houston, Texas · Highest wind 13 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 Aug 23, 2026 11:18 PM UTC
91°F
109°F
13 mph
1009-1015 hPa
Current I-45 Conditions by State
See live weather forecast for I‑45. Get real‑time I‑45 road and weather conditions displayed directly on the interactive map for your route through southeast Texas.
The map shows live weather conditions along Interstate 45, updated frequently to help drivers plan safer trips. Forecasts are generated for the next 6 hours at key highway points and include temperature and conditions such as clear skies, rain, storms, snow, high wind, hail, and more.
No full closures are reported on I-45 as of Aug 23, 2026 11:18 PM UTC, and no lane closures or roadworks either. Always check with the responsible state DOT before setting off.
Texas I-45 weather conditions
Houston, TX weather
- In Houston, TX, a heat advisory is currently in effect from 6:49 AM on August 23, 2026, until 7:00 PM on August 24, 2026
- The maximum feels-like temperature is forecasted to reach 38.9 °C (102 °F) within the next 5 to 6 hours, indicating a significant risk from high temperatures
- Presently, the temperature is 27.3 °C (81 °F) with a feels-like temperature of 31.1 °C (88 °F)
- The humidity level is at 85%, contributing to the discomfort
- Winds are gentle, blowing from the west-southwest at approximately 4 km/h (3 mph)
- Visibility is good at 16 km (9.9 miles)
- The atmospheric pressure stands at 1015 mb (29.9 inHg)
- Overall, outdoor activities should be approached with caution due to the heat advisory and the high feels-like temperature.
Dallas, TX weather
- In Dallas, TX, an extreme heat warning is currently in effect from 12:00 PM to 9:00 PM today, indicating significant risks associated with high temperatures
- The maximum feels-like temperature is forecasted to reach approximately 39.2 °C (102 °F) later today
- Additionally, an air quality alert is active until 5:15 PM, suggesting that outdoor activities may be impacted due to moderate air quality risks
- The temperature is currently 29.9 °C (85.8 °F) with a dew point of 20.4 °C (68.7 °F), leading to a humidity level of 57%
- Winds are coming from the southeast at about 4 km/h (2 mph)
- Visibility is good at 16 km (9.9 miles)
- The atmospheric pressure is measured at 1016 mb (30.06 inHg)
- As the day progresses, it is advisable to stay hydrated and limit outdoor exposure, especially during the peak heat hours.
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 colours the route along I-45 by what is on the carriageway right now — dry, wet, slush, snow or ice — from radar and surface data, last updated Aug 23, 2026 11:18 PM UTC. Right now temperatures run from 91°F to 109°F and the strongest wind is 13 mph.
- 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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