Climate Insights for Fountain Hills

The climate in Fountain Hills is warm and mild. The average annual temperature is 23°C and approximately 266mm of precipitation falls per year. January is the wettest month, receiving around 38mm of rainfall. Fountain Hills is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, December, February, when temperatures can drop to 6°C.

Temperatures in Fountain Hills vary considerably across the year, with a 35°C difference between the coldest and warmest months. July is the hottest month, with daytime highs reaching 41°C and an average of 35°C. January is the coolest month, with minimum temperatures around 6°C and an average of 11°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Fountain Hills is a quite dry location, receiving approximately 266mm of precipitation annually, which averages out to around 22mm per month. The wettest month is January, averaging 38mm of rainfall. February and March also tend to see above-average precipitation. The driest month is May, with just 2mm. That's 36mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Fountain Hills is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently summer in Fountain Hills, which began on June 21, 2026. Fountain Hills is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 41°C, while the coldest stretch bottoms out in January near 6°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Fountain Hills is during March, April, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 20mm per month. By contrast, July can be uncomfortably hot with highs reaching 41°C, while January is the coldest period with lows dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Fountain Hills based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.