Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The shift into May brings a slight increase in the average high-temperature, moving from 75.2°F (24°C) in April to a still moderately hot 82.9°F (28.3°C). A noticeable downturn in temperature characterizes the May nights, averaging at a mild 57.7°F (14.3°C).Humidity
The least humid month is May, with an average relative humidity of 21%.Rainfall
In Portal, Arizona, in May, it is raining for 2.1 days, with typically 0.16" (4mm) of accumulated precipitation. In Portal, Arizona, during the entire year, the rain falls for 73.4 days and collects up to 7.91" (201mm) of precipitation.Snowfall
In Portal, snow does not fall in April through October.Daylight
The average length of the day in May is 13h and 48min.On the first day of May in Portal, sunrise is at 5:29 am and sunset at 6:57 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 7:17 pm MST.
Sunshine
In May, the average sunshine is 11.7h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In May, the maximum UV index of 7 transforms into these recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
How hot does it get in Portal in May?
What is the least humid month in Portal?
What is the average humidity in May in Portal?
How much does it rain in Portal in May?
When it does not snow in Portal?
How many hours of daylight does Portal have in May?
What time are sunrise and sunset in May in Portal?
How long on average sun shines in May in Portal?
When is the highest UV index in Portal?
What is the UV index reading in May in Portal?
Average temperature in May
Portal, AZ
- Average high temperature in May: 82.9°F
The warmest month (with the highest average high temperature) is June (92.8°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in May: 57.7°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).
Average pressure in May
Portal, AZ
- Average pressure in May: 29.87"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
Portal, AZ
- Average wind speed in May: 10.7mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is January (7.1mph).
Average humidity in May
Portal, AZ
- Average humidity in May: 21%
The month with the highest relative humidity is December (51%).
The month with the lowest relative humidity is May (21%).
Average rainfall in May
Portal, AZ
- Average rainfall in May: 0.16"
The wettest month (with the highest rainfall) is July (1.81").
The driest month (with the least rainfall) is April (0.12").
Average rainfall days in May
Portal, AZ
- Average rainfall days in May: 2.1 days
The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is May (2.1 days).
Average snowfall in May
Portal, AZ
- Average snowfall in May: 0"
The month with the highest snowfall is December (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Portal, AZ
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (1.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Portal, AZ
- Average daylight in May: 13h and 5min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in May: 11h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in May
Portal, AZ
- Average sunshine days in May: 28.5 days
The month with the most sunshine days is May (28.5 days).
The month with the least sunshine days is July (9.9 days).
Average UV index in May
Portal, AZ
- Average UV index in May: 7
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in May
Portal, AZ
- Average cloud cover in May: 8
The months with the most cloud cover are July and December (Cloud cover 20).
The month with the least cloud cover is May (Cloud cover 8).
Average visibility in May
Portal, 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).
Portal, Arizona, USA
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