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Surprise, AZ Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Surprise, AZ?
Surprise, AZ gets 8.3 in of precipitation a year over about 30 rainy days. July is the warmest month (average high 107°F) and January the coldest (average low 42°F).
Desert climate
Surprise, AZ has hot summers and warm winters. Daytime highs range from about 66°F in December to 107°F in July. February is usually the wettest month. The most comfortable time to visit is typically January, March, and November to December, when daytime highs sit near 72°F.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 43° | 68° |
| Spring | Mar–May | 57° | 87° |
| Summer | Jun–Aug | 78° | 106° |
| Autumn | Sep–Nov | 61° | 89° |
How much rain does Surprise get?
Surprise gets 8.3 in of precipitation in an average year, spread over about 30 days with measurable rain. That is fewer rainy days than 92% of the US.
February is the wettest month, with 1.3 in. June is the driest, with 0.0 in. February has the most rainy days, about 4.
The longest dry spell in the last five years lasted 163 days, to July 31, 2026.
From September 2025 to August 2026 Surprise got 11.7 in of rain, against a normal of 8.3 in for those months. September 2025 had the most, with 4.0 in.
See where Surprise ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Arizona.
Surprise weather by month
Surprise weather in January
In January, Surprise averages a high of 68°F and a low of 42°F. It gets 1.0 in of precipitation over about 3 rainy days. Estimated sunshine is 62% of daylight hours, derived from ERA5 cloud cover. The January record high is 87°F (1971) and the record low is 20°F (1970). January is one of the most comfortable months to visit.
Surprise weather in February
In February, Surprise averages a high of 71°F and a low of 45°F. It gets 1.3 in of precipitation over about 4 rainy days. Estimated sunshine is 69% of daylight hours, derived from ERA5 cloud cover. The February record high is 90°F (2026) and the record low is 24°F (1990).
Surprise weather in March
In March, Surprise averages a high of 79°F and a low of 50°F. It gets 1.0 in of precipitation over about 3 rainy days. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The March record high is 105°F (2026) and the record low is 24°F (1971). March is one of the most comfortable months to visit.
Surprise weather in April
In April, Surprise averages a high of 86°F and a low of 56°F. It gets 0.3 in of precipitation over about 2 rainy days. Estimated sunshine is 82% of daylight hours, derived from ERA5 cloud cover. The April record high is 104°F (2012) and the record low is 32°F (1977).
Surprise weather in May
In May, Surprise averages a high of 95°F and a low of 65°F. It gets 0.1 in of precipitation over about 1 rainy days. Estimated sunshine is 88% of daylight hours, derived from ERA5 cloud cover. The May record high is 113°F (2000) and the record low is 41°F (1975).
Surprise weather in June
In June, Surprise averages a high of 104°F and a low of 73°F. It gets 0.0 in of precipitation over about 0 rainy days. Estimated sunshine is 81% of daylight hours, derived from ERA5 cloud cover. The June record high is 122°F (1990) and the record low is 52°F (1971).
Surprise weather in July
In July, Surprise averages a high of 107°F and a low of 81°F. It gets 0.8 in of precipitation over about 3 rainy days. Estimated sunshine is 60% of daylight hours, derived from ERA5 cloud cover. The July record high is 122°F (1995) and the record low is 62°F (1978).
Surprise weather in August
In August, Surprise averages a high of 106°F and a low of 80°F. It gets 1.0 in of precipitation over about 4 rainy days. Estimated sunshine is 63% of daylight hours, derived from ERA5 cloud cover. The August record high is 118°F (2025) and the record low is 58°F (1970).
Surprise weather in September
In September, Surprise averages a high of 101°F and a low of 74°F. It gets 0.7 in of precipitation over about 2 rainy days. Estimated sunshine is 81% of daylight hours, derived from ERA5 cloud cover. The September record high is 114°F (2020) and the record low is 51°F (1970).
Surprise weather in October
In October, Surprise averages a high of 89°F and a low of 61°F. It gets 0.6 in of precipitation over about 2 rainy days. Estimated sunshine is 83% of daylight hours, derived from ERA5 cloud cover. The October record high is 110°F (2024) and the record low is 35°F (1970).
Surprise weather in November
In November, Surprise averages a high of 76°F and a low of 49°F. It gets 0.6 in of precipitation over about 2 rainy days. Estimated sunshine is 76% of daylight hours, derived from ERA5 cloud cover. The November record high is 95°F (2020) and the record low is 28°F (1976). November is one of the most comfortable months to visit.
Surprise weather in December
In December, Surprise averages a high of 66°F and a low of 42°F. It gets 0.9 in of precipitation over about 4 rainy days. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The December record high is 84°F (1980) and the record low is 21°F (1978). December is one of the most comfortable months to visit.
Sunshine, humidity and wind in Surprise
May is the sunniest month in Surprise, with estimated sunshine of 88% of daylight hours from ERA5 cloud cover. July is the cloudiest, at 60%. The annual cloud-cover estimate is 73% of daylight hours; it is not a measurement of sunshine duration. Surprise is sunnier than 99% of the US.
Humidity peaks in January at 46% and is lowest in May at 16%.
Surprise has about 167 days a year above 90°F. Surprise is hotter than 99% of the US.
Thunderstorms occur on about 21 days a year.
See where Surprise ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
First and last freeze in Surprise
The first fall freeze in Surprise typically comes around December 12, and the last spring freeze around January 31. That leaves a frost-free growing season of about 315 days.
Surprise weather records
These records cover YOUNGTOWN during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Surprise station is 122°F, on June 26, 1990. The coldest is 20°F, on January 3, 1970.
The wettest day in the available station history brought 2.7 in of precipitation, on August 24, 1982.
36 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.7°F per decade since 1970.
The best time to visit Surprise
The most comfortable time to visit is typically January, March, and November to December, when daytime highs sit near 72°F.
Winter (December–February) is warm, with average highs around 68°F and lows near 43°F.
Spring (March–May) is hot, with average highs around 87°F and lows near 57°F.
Summer (June–August) is hot, with average highs around 106°F and lows near 78°F.
Autumn (September–November) is hot, with average highs around 89°F and lows near 61°F.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 42° | 68° | 0.98 in | 3 | 46% | 62% | 87° | 20° |
| February | 45° | 71° | 1.3 in | 4 | 36% | 69% | 90° | 24° |
| March | 50° | 79° | 1.0 in | 3 | 35% | 64% | 105° | 24° |
| April | 56° | 86° | 0.29 in | 2 | 19% | 82% | 104° | 32° |
| May | 65° | 95° | 0.11 in | 1 | 16% | 88% | 113° | 41° |
| June | 73° | 104° | 0.03 in | 0 | 16% | 81% | 122° | 52° |
| July | 81° | 107° | 0.84 in | 3 | 26% | 60% | 122° | 62° |
| August | 80° | 106° | 0.97 in | 4 | 32% | 63% | 118° | 58° |
| September | 74° | 101° | 0.74 in | 2 | 26% | 81% | 114° | 51° |
| October | 61° | 89° | 0.59 in | 2 | 25% | 83% | 110° | 35° |
| November | 49° | 76° | 0.61 in | 2 | 28% | 76% | 95° | 28° |
| December | 42° | 66° | 0.90 in | 4 | 38% | 64% | 84° | 21° |
Station: YOUNGTOWN, 5 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Surprise climate questions
How much rain does Surprise get?
Surprise gets 8.3 in of precipitation in an average year, over about 30 rainy days.
What is the wettest month in Surprise?
February is the wettest month in Surprise, with 1.3 in. June is the driest, with 0.0 in.
How many rainy days does Surprise have a year?
Surprise has about 30 days with measurable rain in an average year. February has the most, about 4.
What is the hottest month in Surprise?
July is the warmest month in Surprise, with an average high of 107°F.
What is the coldest month in Surprise?
January is the coldest month in Surprise, with an average low of 42°F.
What is the record high temperature in Surprise?
Within the available 1970–2026 station history, the record high at the Surprise station is 122°F, set on June 26, 1990. The record low is 20°F, on January 3, 1970.
What is the sunniest month in Surprise?
May is the sunniest month in Surprise, with estimated sunshine of 88% of daylight hours from ERA5 cloud cover. July is the cloudiest.
When is the first frost in Surprise?
The first fall freeze in Surprise typically comes around December 12. The last spring freeze is around January 31.
What is the best time to visit Surprise?
The most comfortable time to visit is typically January, March, and November to December, when daytime highs sit near 72°F.