Climate Insights for Oro Valley

The climate in Oro Valley is warm and mild. The average annual temperature is 21°C and approximately 355mm of precipitation falls per year. July is the wettest month, receiving around 70mm of rainfall. Oro Valley is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: June, July, August. The coldest months are January, February, December, when temperatures can drop to 5°C.

Temperatures in Oro Valley vary considerably across the year, with a 32°C difference between the coldest and warmest months. June is the hottest month, with daytime highs reaching 37°C and an average of 30°C. January is the coolest month, with minimum temperatures around 5°C and an average of 10°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Oro Valley is a quite dry location, receiving approximately 355mm of precipitation annually, which averages out to around 30mm per month. The wettest month is July, averaging 70mm of rainfall. August and January also tend to see above-average precipitation. The driest month is April, with just 4mm. That's 66mm less than July, 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.

Oro Valley is relatively calm, with an average annual wind speed of 9km/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 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months.

It is currently summer in Oro Valley, which began on June 21, 2026. Oro Valley 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 June at around 37°C, while the coldest stretch bottoms out in January near 5°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Oro Valley is during March, April, May, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 14mm per month. By contrast, June can be uncomfortably hot with highs reaching 37°C, while January is the coldest period with lows dropping to 5°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Oro Valley 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.