Climate & Weather in Chandler
Chandler shares the broader Phoenix-metro Sonoran Desert climate: extremely hot, dry summers with a distinct July-September monsoon season, and mild, sunny winters -- a genuinely different climate profile from both a humid coastal market and a four-season northern one.
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Learn moreExtreme summer heat is the defining seasonal fact
The Phoenix metro area averages 111 days a year at or above 100°F, typically clustered between May and October, per aggregated 2025-2026 climate reporting. 2025 saw its first 100°F day on April 11 -- about three weeks earlier than the typical start of triple-digit season -- and August 2025 was on track to be the hottest on record, with temperatures exceeding 110°F nearly every day. Overnight relief has also diminished: 2025 saw 23 nights that never dropped out of the 90s, more than triple what the region used to average annually.
Monsoon season (July-September) brings a genuinely different set of hazards
Arizona's summer monsoon season is described as "the most dangerous time of year weather-wise in the Southwest" by Maricopa County -- while it brings welcome rain and heat relief, it also brings lightning, severe wind, haboob dust storms (roughly 1-3 per year regionally, 30-60 mph winds), and flash flooding in washes. See insurance-hazard-costs for the fuller hazard and insurance picture.
Mild, sunny winters -- and no hurricane or tornado exposure
Winters in the Phoenix metro (Chandler included) are mild and dry by comparison, a real seasonal draw for the region generally. Chandler carries no hurricane or coastal storm-surge risk (it sits nowhere near a coast) and does not carry the tornado-risk profile relevant to some other states in this dataset -- its genuine severe-weather exposure is monsoon-season thunderstorm activity (wind, dust, flash flooding), not tornadoes as a primary threat category.
Key takeaways
- The Phoenix metro (including Chandler) averages 111 days a year at or above 100°F, typically May-October; 2025's first 100°F day came April 11, about three weeks early, and August 2025 tracked as the hottest on record.
- The July-September monsoon season is genuinely the most hazardous weather period regionally -- lightning, severe wind, haboob dust storms, and flash flooding in washes, not a hurricane risk.
- Winters are mild and dry. Chandler carries no hurricane/coastal storm-surge risk and does not carry the tornado-risk profile of some other states in this dataset -- its real severe-weather exposure is monsoon-driven wind, dust, and flash flooding.
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