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High Temperature Forecast Issued for Phoenix
An automatic forecast alert from wweather1.com indicates that temperatures in Phoenix, United States, are expected to reach a maximum of 40.6°C on September 12, 2026.
According to weather forecast data from wweather1.com, a high-severity heat event is projected for Phoenix, US. The maximum temperature is forecasted to reach 40.6°C on September 12, 2026.
The automated alert was triggered after the forecasted maximum temperature exceeded the designated threshold of 40°C. The system recorded the event start time as September 12, 2026, at 00:00:00.000Z.
This notice was generated automatically based on wweather1.com's internal forecast data to highlight conditions where forecasted metrics cross predefined threshold limits.
Why it is dangerous and what to do
⚠️ Safety
• Stay hydrated by drinking plenty of water throughout the day.
• Limit outdoor activities during peak afternoon hours.
• Seek air-conditioned or shaded environments to remain cool.
📊 The numbers, from wweather1 data
Phoenix: now +31°, Clear.
That is 3° above the September climate norm.
The record for this date is +43° (1971).
Three-day forecast: 12 September: +40°/+29° · 13 September: +41°/+29° · 14 September: +38°/+29°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates. 🌍 Weather in nearby cities
Los Angeles
now
🌙
+22°
Tijuana
now
🌙
+21°
Phoenix
now
🌙
+31°
Ciudad Juárez
now
🌙
+26°
San Diego
now
🌙
+21°
Mexicali
now
🌙
+30°
📰 Data source: wweather1. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.