Every year around this time there’s chatter on the TV news, in the papers and on social media about when the Valley of the Sun will first hit 100 degrees. As of today, the National Weather Service predicts it could happen Sunday. But Accuweather begs to differ. And either way, it almost surely won’t happen in most of North Phoenix, where proximity to the mountains moderates the heat.
While Sky Harbor Airport — the official site of record in Phoenix for the NWS — flirts with the century mark this weekend, Deer Valley Airport is expected to be 2-3 degrees cooler. Farther north in Anthem, temps will be 5 to 7 degrees cooler than central Phoenix. That’s a typical spread, according to the state climatologist.
If Sky Harbor does not hit 100°, Accuweather can claim a small victory. Its forecast calls for a high of 99° Sunday. The Weather Underground’s forecast for both airports is similar to that of the NWS. The big winner could be allergy sufferers. Triple digits dampen the blooms that flood the air with allergens. [See Allergy Tips]
Triple Digit Facts (for Sky Harbor)
- Average occurrence of 100°: April 29
- Earliest occurrence of 100°: March 12, 1916
- Latest occurrence of 100°: June 13, 1971