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Contents
- The climate of Surprise
- The best time to visit Surprise
- The worst time to visit Surprise
- Spring weather in Surprise
- Summer weather in Surprise
- Autumn weather in Surprise
- Winter weather in Surprise
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Surprise
Surprise, a city in the western region of the Greater Phoenix Metropolitan Area in Arizona, USA, is predominantly governed by a Subtropical Steppe climate, as described by the Köppen climate classification system as BSh. The city's geographical location contributes significantly to its distinct weather pattern.
Throughout the year, Surprise experiences an extensive range in both of its high and low-temperature parameters, with high temperature averages from 63.3°F (17.4°C) to an extreme 101.7°F (38.7°C) and low temperatures fluctuating from a chilly 46°F (7.8°C) and reaching a peak at a warm 83.1°F (28.4°C). The pattern of humidity tends to mirror that of the temperatures, beginning at 43% relative humidity in January, decreasing gradually to a low point of 17% in June, and climbing back upwards to 44% in December.
Mohave (in Western Arizona) is a desert receiving minimal average rainfall from 0.12" (3mm) in June to a high of 1.3" (33mm) in July, causing a significant fluctuation in rainfall days from merely 1.2 days in June up to 11.4 days in July. One of the notable weather characteristics of Surprise is the high average daylight hours that vary from 10 hours in January and December to an extensive 14.4 hours in June. This abundance of sunshine is also reflected in sunshine hours, which climbs from an average of 7 hours in January to 12.2 hours in June.
Wind speeds hover between 4.7mph (7.6km/h) to 6.7mph (10.8km/h) throughout the year with wind gusts surging from 7.6mph (12.2km/h) to 10mph (16.1km/h) for the majority of the year. Yet, the city enjoys a good visibility level standing steadily at 6 miles throughout the year, underlining the overall clear weather conditions.
Throughout the year, Surprise experiences an extensive range in both of its high and low-temperature parameters, with high temperature averages from 63.3°F (17.4°C) to an extreme 101.7°F (38.7°C) and low temperatures fluctuating from a chilly 46°F (7.8°C) and reaching a peak at a warm 83.1°F (28.4°C). The pattern of humidity tends to mirror that of the temperatures, beginning at 43% relative humidity in January, decreasing gradually to a low point of 17% in June, and climbing back upwards to 44% in December.
Mohave (in Western Arizona) is a desert receiving minimal average rainfall from 0.12" (3mm) in June to a high of 1.3" (33mm) in July, causing a significant fluctuation in rainfall days from merely 1.2 days in June up to 11.4 days in July. One of the notable weather characteristics of Surprise is the high average daylight hours that vary from 10 hours in January and December to an extensive 14.4 hours in June. This abundance of sunshine is also reflected in sunshine hours, which climbs from an average of 7 hours in January to 12.2 hours in June.
Wind speeds hover between 4.7mph (7.6km/h) to 6.7mph (10.8km/h) throughout the year with wind gusts surging from 7.6mph (12.2km/h) to 10mph (16.1km/h) for the majority of the year. Yet, the city enjoys a good visibility level standing steadily at 6 miles throughout the year, underlining the overall clear weather conditions.
The best time to visit Surprise
The ideal time to visit Surprise is between April and June when temperatures are warm and pleasant, ranging from a high of 81.3°F (27.4°C) to 100.4°F (38°C) and a low from 59.4°F (15.2°C) to 74.1°F (23.4°C). Relative humidity also lessens during this time frame from 22% to 17% and the hours of daylight are at their highest of the year, thus allowing for prolonged outdoor activities. Sunshine hours also contribute positively, starting at 10.8 hours in April and reaching a high of 12.2 hours in June.
The worst time to visit Surprise
It's recommended to avoid visits to Surprise during the height of summer, specifically from July to August. During this season, temperatures are at their highest, with the average high reaching a scorching 101.7°F (38.7°C) in July and a balmy 100.9°F (38.3°C) in August. The relative humidity also increases uncomfortably during this time frame, making the excess heat harder to endure.
Spring weather in Surprise
Spring in Surprise unfolds with warm and dry conditions. Temperatures during this period can range from a chilly 48.2°F (9°C) to a delightful 89.2°F (31.8°C). Relative humidity drops from 39% in February to 20% in May. These dryer conditions are welcomed by a gradual increase in sunshine hours from 7 hours in February to a bright 11.9 hours by the end of May.
Summer weather in Surprise
The summer season in Surprise is marked by sweltering heat and an increase in humidity. Temperatures can soar to a high of 101.7°F (38.7°C) in July, while the minimum temperatures can reach a hot 83.1°F (28.4°C) in August. However, this is also the period that receives the most rainfall, with July experiencing up to 1.3" (33mm) of rain spread over 11.4 days.
Autumn weather in Surprise
Autumn in Surprise ushers in a period of cooling, with temperatures ranging from an enjoyable 65.5°F (18.6°C) to a still warm 95°F (35°C). Average rainfall continues its decreasing trend starting from 1.18" (30mm) in September to 0.63" (16mm) in November. Sunshine hours also recede from 9.7 hours in September to 7.3 hours in November.
Winter weather in Surprise
Winter, spanning from December to February, is a mild season in Surprise, with low temperatures falling to a bearable 46°F (7.8°C) in January and high temperatures remaining at a peaceful 66.2°F (19°C) in February. The month of December experiences a relative increase in rainfall at 0.75" (19mm), compared to 0.59" (15mm) in January. Average daylight and sunshine hours are also at their lowest during this season, corresponding with winter solstice occurrence.
Weather in January
January starts with a chill in the air. Despite the beginning of a warm surprise in Arizona, the lowest temperature is 46°F (7.8°C). This period, marked by short days with average daylight hours of 10.2 and 43% relative humidity, also witnesses minimum rainfall. Weather in January »
Weather in February
February brings a pleasant transition, leaving the January chill behind. The days become longer with increased sunshine hours compared to the previous month. The city's temperature in February reaches up to 66.2°F (19°C). This month, sunny days are prevalent, with rainfall levels similar to January. Weather in February »
Weather in March
The first twitches of spring can be felt in March. The temperatures gradually increase, promising warmer days. A notable high of 74.7°F (23.7°C) is observed in March, slowly leading the city towards summer. Clouds are sparser in the sky, making way for pleasant sunny days and cool nights. Weather in March »
Weather in April
April carries forward the delight of March, yet it brings warmer days. The temperatures set the stage for the forthcoming summer months. Residents embrace the soothing warmth with an average high of 81.3°F (27.4°C). April witnesses less rainfall and a significant increase in sunshine hours. Weather in April »
Weather in May
May forges the path into summer, manifesting the highest temperatures yet for the year. Spending time outdoors becomes more enjoyable, as the temperature reaches a May high of 89.2°F (31.8°C). The weather is largely dry, accompanied by long hours of sunshine. Weather in May »
Weather in June
June brings the heatwave to the city of Surprise, marking the onset of summer with temperatures peaking at around 100.4°F (38°C). The city basks under an abundant sunshine. With low chances of rain, residents anticipate the occasional summer storm to provide a respite from the high heat intensity. Weather in June »
Weather in July
July, the hottest month of the year, witnesses the mercury hitting a record high of 101.7°F (38.7°C). The city of Surprise experiences its wake-up call to summer's peak. Searing heat dominates the weather, with long sunny days and minimum chances of rainfall. Weather in July »
Weather in August
August sustains July's temperatures, barely providing any respite from the summer heat. High temperatures continue through the month, reaching an average high of 100.9°F (38.3°C). Sunshine is still plentiful, and rainfall remains scarce, as Surprise endures the peak of summer. Weather in August »
Weather in September
September begins the slow transition from summer to fall. Temperatures start to drop, providing relief from the summer heat. A high of 95°F (35°C) indicates summer's slow departure. The sky fills with clouds more frequently, hinting at the approaching rainy season. Weather in September »
Weather in October
October in Surprise means embracing the fall. As the month progresses, the weather becomes cooler, and the heat of the summer becomes a distant memory. October's pleasant temperatures play around 83.5°F (28.6°C). The days are comfortable, and the chill returns to the nights, allowing everyone to enjoy Fall activities outdoors. The shift from September to October in Surprise involves a decrease in the average high-temperature, from a sweltering 95°F (35°C) to a warm 83.5°F (28.6°C). Weather in October »
Weather in November
November, leading towards the closure of the year, brings a notable drop in temperature to a maximum of 72.5°F (22.5°C). The season of fall comes to an end, preparing the city for winter's arrival. Decreased sunshine hours and increased cloud cover set the scene for the upcoming cold season. Weather in November »
Weather in December
December marks the onset of winter in the City of Surprise. The temperatures dip further, with a high of 61.7°F (16.5°C), preparing residents for cozy indoor festivities. Short daylight hours and increased humidity indicate the year's final stretch. Weather in December »
Updated: Feb 9, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How much does it rain in Surprise?
Throughout the year, there are 60.7 rainfall days, and 8.62" (219mm) of precipitation is accumulated.
What is the least humid month in Surprise?
With an average relative humidity of 17%, June is the least humid month in Surprise.
What is the driest month in Surprise?
June is the month with the least rainfall in Surprise, Arizona. Rain falls for 1.2 days and accumulates 0.12" (3mm) of precipitation.
When are the longest days in Surprise?
With an average of 14h and 24min of daylight, June has the longest days of the year in Surprise.
What month has the most sunshine in Surprise?
With an average of 12.2h of sunshine, June has the most sunshine of the year in Surprise, Arizona.
What are the months with the highest UV index in Surprise?
June through August, with an average maximum UV index of 8, are months with the highest UV index.
What is the warmest month in Surprise?
July temperatures tend to peak at an average high of 101.7°F (38.7°C) and dip to a low of 82.2°F (27.9°C).
What is the wettest month in Surprise?
The month with the most rainfall in Surprise, Arizona, is July, when the rain falls for 11.4 days and typically aggregates up to 1.3" (33mm) of precipitation.
What are the coldest months in Surprise?
During the coldest month in Surprise, December, temperatures average a high of 61.7°F (16.5°C) and a low of 46°F (7.8°C).
What is the most humid month in Surprise?
December is the most humid month in Surprise, Arizona, with an average relative humidity of 44%.
What is the month with the shortest days in Surprise?
With an average of 10h and 0min of daylight, December has the shortest days of the year.
Is there Daylight Saving Time (DST) in Surprise?
Surprise does not observe Daylight Saving Time (DST). MST timezone is used throughout the entire year.
What is the month with the least sunshine in Surprise?
The month with the least sunshine in Surprise, Arizona, is December, with an average of 6.8h of sunshine.
When is the lowest UV index in Surprise?
With an average maximum UV index of 3, December is the month with the lowest UV index in Surprise.
Average temperature
Surprise, AZ
The warmest month (with the highest average high temperature) is July (101.7°F).
The month with the lowest average high temperature is December (61.7°F).
The month with the highest average low temperature is August (83.1°F).
The coldest months (with the lowest average low temperature) are January and December (46°F).
Average pressure
Surprise, AZ
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.02"Hg - Average pressure in March:
29.96"Hg - Average pressure in April:
29.88"Hg - Average pressure in May:
29.83"Hg - Average pressure in June:
29.8"Hg
- Average pressure in July:
29.86"Hg - Average pressure in August:
29.86"Hg - Average pressure in September:
29.86"Hg - Average pressure in October:
29.91"Hg - Average pressure in November:
30.01"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.8"Hg).
Average wind speed
Surprise, AZ
- Average wind speed in January:
4.9mph - Average wind speed in February:
5mph - Average wind speed in March:
5.7mph - Average wind speed in April:
6.7mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
5.4mph - Average wind speed in September:
5.3mph - Average wind speed in October:
5.1mph - Average wind speed in November:
4.9mph - Average wind speed in December:
4.7mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).
Average humidity
Surprise, AZ
The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (17%).
Average rainfall
Surprise, AZ
- Average rainfall in January:
0.59" - Average rainfall in February:
0.79" - Average rainfall in March:
0.79" - Average rainfall in April:
0.16" - Average rainfall in May:
0.16" - Average rainfall in June:
0.12"
- Average rainfall in July:
1.3" - Average rainfall in August:
1.26" - Average rainfall in September:
1.18" - Average rainfall in October:
0.91" - Average rainfall in November:
0.63" - Average rainfall in December:
0.75"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days
Surprise, AZ
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
4 days - Average rainfall days in April:
2.9 days - Average rainfall days in May:
2.6 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
11.4 days - Average rainfall days in August:
10.3 days - Average rainfall days in September:
7.1 days - Average rainfall days in October:
4 days - Average rainfall days in November:
3.2 days - Average rainfall days in December:
5.9 days
The month with the highest number of rainy days is July (11.4 days).
The month with the least rainy days is June (1.2 days).
Average daylight / Average sunshine
Surprise, AZ
- Average daylight in January:
10h and 1min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 5min - Average daylight in June:
14h and 2min
- Average daylight in July:
14h and 1min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 2min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
7h and 0min - Average sunshine in February:
9h and 1min - Average sunshine in March:
9h and 1min - Average sunshine in April:
10h and 5min - Average sunshine in May:
11h and 5min - Average sunshine in June:
12h and 1min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 5min - Average sunshine in September:
9h and 4min - Average sunshine in October:
8h and 1min - Average sunshine in November:
7h and 2min - Average sunshine in December:
6h and 5min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days
Surprise, AZ
- Average sunshine days in January:
26.3 days - Average sunshine days in February:
23.3 days - Average sunshine days in March:
26.9 days - Average sunshine days in April:
27.5 days - Average sunshine days in May:
28.2 days - Average sunshine days in June:
27.4 days
- Average sunshine days in July:
15.2 days - Average sunshine days in August:
15.7 days - Average sunshine days in September:
20.3 days - Average sunshine days in October:
25.6 days - Average sunshine days in November:
26.3 days - Average sunshine days in December:
24.5 days
The month with the most sunshine days is May (28.2 days).
The month with the least sunshine days is July (15.2 days).
Average UV index
Surprise, AZ
The months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Surprise, AZ
The month with the most cloud cover is December (Cloud cover 20).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility
Surprise, AZ
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Surprise, Arizona, USA
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