Surprise (AZ) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Surprise.
Climate overview of Surprise
The climate in Surprise, Arizona, United States of America, is marked by large temperature swings across the seasons, ranging from 41°C (106°F) in July to 18°C (64°F) in December.
The area sees almost no rainfall, totalling just 166 mm (6.5 in) per year. June is the sunniest month, averaging 13.6 hours of sunshine per day.
Surprise Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Surprise - and find the best time to visit.
Monthly Temperature in Surprise
In Surprise, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a very hot 41°C (106°F) in July to a moderate 18°C (64°F) in the coolest month, December.
Nights vary from 28°C (82°F) in July to around 5°C (41°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Surprise
Surprise sits in an arid zone with minimal moisture, averaging 166 mm (6.5 in) of rainfall per year. The climate in Surprise shows significant variation throughout the year. Expect low rainfall in August, the wettest month, with an average of 28 mm (1.1 in) of precipitation over 6 rainy days.
In contrast, the driest month June offers drier and sunnier days, with around 0.5 mm (0.02 in) of rainfall over 0 rainy days. For more details, please visit our Surprise Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Surprise
For those who appreciate different seasons, Surprise serves as an ideal destination. Expect longer, more sun-filled days in June with an average of 13.6 hours of sunshine daily, and embrace the darker days in December, offering only 8.1 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Surprise by Month
The relative humidity is low throughout the year in Surprise.
The city experiences its highest humidity in December, reaching 51%. In June, the humidity drops to its lowest level at 19%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Surprise
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, November and December
- Warmest weather: June, July and August
- Most sunshine: May and June
- Fewer rainy days: March, April, May, June and November
- Seasonal pattern: Very little rainfall year-round, with very hot summers and mild winters
Frequently asked questions about the climate in Surprise
What is the best time to visit Surprise?
January, February, March, November and December typically offer the most optimal weather in Surprise. In contrast, May, June, July, August and September tend to have less optimal conditions. Surprise has very little rainfall year-round, with very hot summers and mild winters.
What temperatures can I expect in Surprise?
Daytime highs range from 18°C (64°F) in December to 41°C (106°F) in July. Nighttime lows range from 5°C (41°F) to 28°C (82°F). Temperatures vary considerably through the year.
How much rain does Surprise get?
Annual rainfall is around 166 mm (6.5 in). August is the wettest month with 28 mm (1.1 in), while June is the driest with 0.5 mm (0.02 in).
How sunny is Surprise?
Surprise receives around 3,867 hours of sunshine per year. June is the sunniest month with 407 hours, while December is the cloudiest with just 244 hours. Overall, Surprise enjoys abundant sunshine.
Surprise 3-Day Forecast
Surprise (AZ) 3-Day Forecast
Surprise on the map
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