Climate & Weather in Plano
Plano has a humid subtropical climate: hot, humid summers and mild winters. Per sources reviewed August 2026, August is the hottest month, with an average high around 95°F and average low around 74°F, while the annual temperature range typically runs from about 37°F to 96°F, rarely dropping below 24°F or exceeding 101°F.
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Learn moreSummer: Hot and Long
Plano's warm season runs roughly June through September, with average summer highs commonly in the 90-100°F range and August as the hottest month (average high around 95°F, average low around 74°F). Combined with North Texas humidity, this is a real adjustment for anyone relocating from a drier or more northern climate -- and a direct driver of air-conditioning costs (see the cost-of-living topic page).
Winter: Genuinely Mild, With Occasional Cold Snaps
Winters in Plano are mild by national standards -- temperatures rarely drop below 24°F -- but not entirely without cold-weather risk: North Texas experiences occasional hard freezes and, rarely, significant winter storms, as the wider region did in February 2021. Plano averages about 2 inches of snow per year, a minor but real seasonal feature, not a true winter climate.
Precipitation and Sunshine
Plano receives about 41 inches of rain per year on average, with roughly 229 sunny days annually. Rainfall is not evenly distributed across the calendar -- spring months carry the heaviest severe-thunderstorm and flash-flood risk, covered in detail on the flood-hurricane-risk topic page, rather than a steady year-round pattern.
Severe Weather Season in Practical Terms
Plano's practical severe-weather planning window runs roughly March through June, driven by North Texas's severe-thunderstorm, tornado, and especially hail season -- not a hurricane-season calendar the way Gulf Coast Texas cities plan around. See the flood-hurricane-risk topic page for the full, DFW-specific risk picture, including flash flooding and the region's position within "Hail Alley."
Key takeaways
- Humid subtropical climate: August is the hottest month (avg. high ~95°F, avg. low ~74°F); the annual range typically runs 37°F-96°F, rarely below 24°F or above 101°F.
- Summer (roughly June-September) is hot, long, and humid -- a real adjustment for anyone relocating from a drier or more northern climate.
- Winters are genuinely mild (about 2 inches of snow per year on average) but not risk-free -- occasional hard freezes and rare significant winter storms do occur.
- About 41 inches of rain and 229 sunny days per year on average; the real severe-weather planning window is roughly March-June (severe thunderstorms, tornado risk, and especially hail), not a hurricane-season calendar.
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