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
A subtle rise in the average high-temperature is observed during May, adjusting from 78.4°F (25.8°C) in April to a still moderately hot 85.6°F (29.8°C). During the May nights, an average temperature of 65.7°F (18.7°C) is observed.Heat index
During May, the heat index is calculated to be a torrid 96.8°F (36°C). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.One should consider that heat index numbers are for shaded settings and light wind. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
The average relative humidity in May is 76%.Rainfall
In Istrouma, during May, the rain falls for 14.7 days and regularly aggregates up to 2.83" (72mm) of precipitation. Throughout the year, there are 177.1 rainfall days, and 36.1" (917mm) of precipitation is accumulated.Snowfall
In Istrouma, snow does not fall in February through November.Daylight
In May, the average length of the day is 13h and 42min.On the first day of May, sunrise is at 6:20 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 6:02 am and sunset at 8:02 pm CDT.
Sunshine
The average sunshine in May is 9.7h.UV index
May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 7 in May translates into these instructions:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is May?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
When is the highest UV index?
What is the UV index reading in May?
Average temperature in May
Istrouma, LA
- Average high temperature in May: 85.6°F
The warmest months (with the highest average high temperature) are July and August (91.9°F).
The month with the lowest average high temperature is January (58.6°F).
- Average low temperature in May: 65.7°F
The month with the highest average low temperature is August (73.9°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in May
Istrouma, LA
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.96"Hg).
Average wind speed in May
Istrouma, LA
- Average wind speed in May: 5.3mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.4mph).
Average humidity in May
Istrouma, LA
- Average humidity in May: 76%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Istrouma, LA
- Average rainfall in May: 2.83"
The wettest month (with the highest rainfall) is July (4.72").
The driest month (with the least rainfall) is November (1.77").
Average rainfall days in May
Istrouma, LA
- Average rainfall days in May: 14.7 days
The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in May
Istrouma, LA
- Average snowfall in May: 0"
The month with the highest snowfall is January (0.28").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Istrouma, LA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in May /
Average sunshine in May
Istrouma, LA
- Average daylight in May: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in May: 9h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in May
Istrouma, LA
- Average sunshine days in May: 14.8 days
The month with the most sunshine days is November (19.6 days).
The months with the least sunshine days are July and August (7.3 days).
Average UV index in May
Istrouma, LA
- Average UV index in May: 7
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in May
Istrouma, LA
- Average cloud cover in May: 37
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in May
Istrouma, LA
- Average visibility in May: 5mi
The months with the highest visibility are October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and December (5mi).
Istrouma, Louisiana, USA
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