August weather forecast
Arizona, USA

August in Arizona continues to ride the wave of sweltering summer temperatures, but it is also characterized by increased monsoonal activity, bringing bouts of rain, thunderstorms, and occasionally, flash floods to various parts of the state.

The southern desert regions, including places like Phoenix, remain enveloped in high temperatures during August. Daytimes predominantly showcase temperatures ranging from 100°F (37.8°C) to 110°F (43.3°C). Nights, though slightly cooler, still hover between 75°F (23.9°C) and 85°F (29.4°C). One distinctive feature of August is the heightened monsoonal activity, where sudden thunderstorms can result in rapid downpours. These showers, while providing transient relief from the heat, also raise humidity levels and can lead to flash floods in certain areas.

Flagstaff and the northern highland zones, while warm, offer a more temperate climate compared to the southern counterparts. Daytime temperatures here generally vary from 75°F (23.9°C) to 85°F (29.4°C). Nighttime temperatures offer a refreshing respite with figures between 50°F (10°C) and 60°F (15.6°C). These regions, similar to the south, can witness monsoonal rains, though the intensity and frequency can differ.

When juxtaposed with July, August maintains the high-temperature trend but sees a more pronounced influence of the monsoon season. As Arizona transitions into September, a gradual decrease in temperatures can be expected, especially towards the month's end, marking the onset of the more amiable autumn season.

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• Phoenix - August »
  In Phoenix snow does not fall in January through August, October through December. In Phoenix, during August, the rain falls for 7.2 days and regularly aggregates up to 0.59" (15mm) of precipitation.
• Tucson - August »
  In Tucson in August, during 12.3 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. On the first day of August in Tucson, sunrise is at 5:39 am and sunset at 7:20 pm.
• Mesa - August »
  Continuing the trend of extreme summer heat, August's weather in Mesa, Arizona remains undeterred, maintaining the city's desert reputation. In Mesa, in August, during 8.8 rainfall days, 0.79" (20mm) of precipitation is typically accumulated.
• Chandler - August »
  In Chandler, during August, the rain falls for 9.3 days and regularly aggregates up to 0.94" (24mm) of precipitation. After touching the summer peak, August brings a slight relief to Chandler's inhabitants with the temperature range lowering to span from 83.7°F (28.7°C) to 101.3°F (38.5°C).
• Scottsdale - August »
  In Scottsdale in August, during 9.3 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. May through August, with an average maximum UV index of 8, are months with the highest UV index in Scottsdale, Arizona.
• Glendale - August »
  August is the month with the most rainfall in Glendale, Arizona. On the first day of August in Glendale, sunrise is at 5:41 am and sunset at 7:28 pm.
• Gilbert - August »
  In Gilbert in August, during 8.8 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. On the first day of August in Gilbert, sunrise is at 5:40 am and sunset at 7:26 pm.
• Tempe - August »
  June and August, with an average of 12.1h of sunshine, are months with the most sunshine in Tempe, Arizona. In Tempe in August, it is raining for 9.3 days, with typically 0.94" (24mm) of accumulated precipitation.
• Peoria - August »
  In Peoria, in August, during 10.1 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. On the last day of August, in Peoria sunrise is at 6:02 am and sunset at 6:55 pm MST.
• Surprise - August »
  In Surprise, during August, the rain falls for 10.3 days and regularly aggregates up to 1.26" (32mm) of precipitation. On the last day of August, in Surprise, sunrise is at 6:03 am and sunset at 6:55 pm MST.
• Yuma - August »
  In Yuma, Arizona, during August, the rain falls for 4.1 days and regularly aggregates up to 0.28" (7mm) of precipitation. Following the peak in July, August sees a minute reduction in both temperatures and daylight hours in Yuma.