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 arrival of May signals a slight increase in the average high-temperature, moving from a moderately hot 73.9°F (23.3°C) in April to a still warm 81.5°F (27.5°C). Helena's average low-temperature in the month of May is recorded at a refreshing 61.2°F (16.2°C).Heat index
For May, the heat index is computed to be a hot 86°F (30°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Humidity
In May, the average relative humidity is 73%.Rainfall
In Helena, Alabama, during May, the rain falls for 14.8 days and regularly aggregates up to 3.07" (78mm) of precipitation. Throughout the year, there are 174.2 rainfall days, and 40.08" (1018mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Helena.Daylight
The average length of the day in May in Helena is 13h and 53min.On the first day of the month, sunrise is at 5:58 am and sunset at 7:30 pm. On the last day of May, in Helena, sunrise is at 5:38 am and sunset at 7:51 pm CDT.
Sunshine
The average sunshine in May is 10.2h.UV index
In Helena, the average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 6 in May translates into this advice:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What are May temperatures in Helena?
What is the average humidity in May in Helena?
How much does it rain in Helena in May?
When it does not snow in Helena?
How many hours of daylight does Helena have in May?
What time are sunrise and sunset in May in Helena?
How many hours of sunshine does Helena have in May?
What is the UV index reading in May in Helena?
Average temperature in May
Helena, AL
- Average high temperature in May: 81.5°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (51.1°F).
- Average low temperature in May: 61.2°F
The month with the highest average low temperature is August (71.4°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in May
Helena, AL
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in May
Helena, AL
- Average wind speed in May: 5.7mph
The windiest months (with the highest average wind speed) are February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.4mph).
Average humidity in May
Helena, AL
- Average humidity in May: 73%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Helena, AL
- Average rainfall in May: 3.07"
The wettest month (with the highest rainfall) is April (4.09").
The driest months (with the least rainfall) are September and October (2.36").
Average rainfall days in May
Helena, AL
- Average rainfall days in May: 14.8 days
The month with the highest number of rainy days is July (21.8 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in May
Helena, AL
- Average snowfall in May: 0"
The month with the highest snowfall is January (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Helena, AL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (1.2 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
Helena, AL
- Average daylight in May: 13h and 5min
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 0min).
- Average sunshine in May: 10h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in May
Helena, AL
- Average sunshine days in May: 14.2 days
The month with the most sunshine days is October (19.7 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in May
Helena, AL
- Average UV index in May: 6
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in May
Helena, AL
- Average cloud cover in May: 32
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in May
Helena, AL
- 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).
Helena, Alabama, USA
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