May weather forecastSurprise, AZ
May
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. The nights remain cooler, offering relief from the heat of the day and maintaining a balanced temperature for residents.Temperature
In May, the meteorological conditions subtly change with the average high-temperature edging from a moderately hot 81.3°F (27.4°C) in April to a hot 89.2°F (31.8°C). Surprise sees a consistent average low-temperature of 66°F (18.9°C) in May, indicating a substantial decrease from the day's temperature.Humidity
In May, the average relative humidity is 20%.Rainfall
In Surprise, in May, during 2.6 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. In Surprise, during the entire year, the rain falls for 60.7 days and collects up to 8.62" (219mm) of precipitation.Daylight
The average length of the day in May is 13h and 55min.On the first day of the month, sunrise is at 5:39 am and sunset at 7:13 pm. On the last day of May, sunrise is at 5:20 am and sunset at 7:34 pm MST.
Sunshine
In May, the average sunshine in Surprise is 11.9h.UV index
The average daily maximum UV index in May in Surprise is 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 7 in May translates into this advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Surprise, AZ
- Average high temperature in May: 89.2°F
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).
- Average low temperature in May: 66°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 in May
Surprise, AZ
- Average pressure in May: 29.83"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 in May
Surprise, AZ
- Average wind speed in May: 6.6mph
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 in May
Surprise, AZ
- Average humidity in May: 20%
The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (17%).
Average rainfall in May
Surprise, AZ
- Average rainfall in May: 0.16"
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 in May
Surprise, AZ
- Average rainfall days in May: 2.6 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 in May /
Average sunshine in May
Surprise, AZ
- Average daylight in May: 13h and 54min
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 May: 11h and 54min
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 in May
Surprise, AZ
- Average sunshine days in May: 28.2 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 in May
Surprise, AZ
- Average UV index in May: 7
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 in May
Surprise, AZ
- Average cloud cover in May: 8
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 in May
Surprise, AZ
- Average visibility in May: 6mi
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).
