Climate & Weather in Houston
Houston has a humid subtropical climate: hot, humid summers and mild winters, with essentially no true cold season. Per NOAA 1991-2020 climate normals for Houston Intercontinental Airport (IAH), January's daily mean temperature runs about 53.8°F and August's about 85.2°F -- with typical August highs reaching the low-to-mid 90s°F. Humidity is a year-round feature of daily life here, not just a summer one.
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Learn moreSummer: Hot, Humid, and Long
Houston's warm season stretches roughly from May through September, with August as the hottest month -- a daily mean temperature around 85.2°F per NOAA 1991-2020 normals, and typical daily highs commonly cited in the low-to-mid 90s°F. Combined with Gulf Coast humidity, heat index values routinely exceed the actual air temperature by a meaningful margin during peak summer, a real adjustment for anyone relocating from a drier or more northern climate.
Winter: Genuinely Mild
January, Houston's coolest month, averages a daily mean temperature around 53.8°F per NOAA normals -- mild by nearly any national comparison, with occasional cold snaps (and, rarely, a hard freeze or winter storm, as the region experienced in February 2021) but nothing resembling a true winter season in most years.
Hurricane Season in Practical Terms
Atlantic hurricane season runs June 1 through November 30 and overlaps most of Houston's warm season. As covered on the flood-hurricane-risk topic page, Houston's practical risk during this window is less about direct hurricane landfall (the city sits roughly 50 miles inland) and more about heavy rainfall events, both tropical and non-tropical, that can produce serious flooding at any point in the year -- not just during a named storm.
Humidity as a Year-Round Factor
Houston's Gulf Coast humidity moderates in the comparatively drier winter months but rarely disappears entirely, and it's present across most of the calendar, not just the hot months. This factors directly into daily comfort, air-conditioning costs (see the cost-of-living topic page), and outdoor-activity planning, and is a genuine adjustment for anyone relocating from a drier climate.
Key takeaways
- Per NOAA 1991-2020 normals (IAH): January's daily mean is about 53.8°F; August's about 85.2°F, with typical summer highs in the low-to-mid 90s°F -- Houston has essentially no true cold season.
- Summer (roughly May-September) is hot, long, and humid; heat index values routinely exceed actual air temperature by a meaningful margin.
- Hurricane season (June 1-November 30) overlaps most of the warm season -- but Houston's practical risk during this window is mainly heavy-rainfall flooding, not direct storm landfall, given the city's ~50-mile inland position.
- Humidity is a year-round factor, not just a summer one -- a real adjustment for anyone relocating from a drier climate.
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