May weather forecastSan Luis, AZ
May
Weather in May
With a dramatic increase in temperatures peaking at 92.8°F (33.8°C), May in San Luis, Arizona manifests the onset of summer. As the month progresses, daylight hours extend, allowing more time for outdoor activities despite the climbing heat. Visibility remains excellent throughout this time, indicating minimal precipitation and fog. Increased wind speeds can provide some respite, albeit temporary, from the escalating heat. In essence, May marks the city's transition into the peak of its summer season.Temperature
The shift into May is characterized by a subtle rise in the average high-temperature, transitioning from April's tropical 86.5°F (30.3°C) to a still hot 92.8°F (33.8°C). During May, San Luis notes a substantial drop from the daytime peak to an average minimum temperature of 68.7°F (20.4°C).Humidity
The average relative humidity in May is 24%.Rainfall
May is the only month when rain does not fall.Daylight
In May, the average length of the day is 13h and 50min.On the first day of the month, sunrise is at 5:51 am and sunset at 7:20 pm. On the last day of May, sunrise is at 5:32 am and sunset at 7:41 pm MST.
Sunshine
The average sunshine in May in San Luis is 12h.UV index
In San Luis, the average daily maximum UV index in May is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 7 in May leads to these recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
San Luis, AZ
- Average high temperature in May: 92.8°F
The warmest month (with the highest average high temperature) is July (106.2°F).
The month with the lowest average high temperature is December (67.1°F).
- Average low temperature in May: 68.7°F
The month with the highest average low temperature is August (86.2°F).
The coldest month (with the lowest average low temperature) is December (50.5°F).
Average pressure in May
San Luis, AZ
- Average pressure in May: 29.81"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.75"Hg).
Average wind speed in May
San Luis, AZ
- Average wind speed in May: 8mph
The windiest month (with the highest average wind speed) is July (8.5mph).
The calmest month (with the lowest average wind speed) is November (6.7mph).
Average humidity in May
San Luis, AZ
- Average humidity in May: 24%
The month with the highest relative humidity is December (38%).
The month with the lowest relative humidity is June (23%).
Average rainfall in May
San Luis, AZ
- Average rainfall in May: 0"
The wettest month (with the highest rainfall) is July (0.39").
The driest month (with the least rainfall) is May (0").
Average rainfall days in May
San Luis, AZ
- Average rainfall days in May: 0.3 days
The month with the highest number of rainy days is July (5.1 days).
The month with the least rainy days is May (0.3 days).
Average daylight in May /
Average sunshine in May
San Luis, AZ
- Average daylight in May: 13h and 48min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in May: 12h and 0min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).
Average sunshine days in May
San Luis, AZ
- Average sunshine days in May: 30.4 days
The month with the most sunshine days is May (30.4 days).
The month with the least sunshine days is July (24.3 days).
Average UV index in May
San Luis, AZ
- Average UV index in May: 7
The months with the highest UV index are June, July, August and September (UV index 8).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in May
San Luis, AZ
- Average cloud cover in May: 6
The month with the most cloud cover is December (Cloud cover 18).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in May
San Luis, 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).
