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
May brings a slight rise in Rock Island's average high-temperature, moving from 77.9°F (25.5°C) in April to a still warm 84.4°F (29.1°C). Throughout May, the average low-temperature records at a comfortable 67.3°F (19.6°C).Heat index
In May, the average heat index is estimated at a very hot 95°F (35°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.One should consider that heat index numbers are for shaded settings and light wind. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.
Humidity
The months with the highest humidity in Rock Island are March, May and June, with an average relative humidity of 78%.Rainfall
The month with the most rainfall is May, when the rain falls for 16.1 days and typically aggregates up to 4.17" (106mm) of precipitation.Snowfall
March through November are months without snowfall.Daylight
In May, the average length of the day is 13h and 38min.On the first day of the month, sunrise is at 6:43 am and sunset at 8:03 pm. On the last day of May, sunrise is at 6:26 am and sunset at 8:21 pm CDT.
Sunshine
The average sunshine in May is 8.4h.UV index
The average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 6 in May transforms into the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is May in Rock Island?
What is the most humid month in Rock Island?
What is the average humidity in May?
What is the wettest month?
How many days does it rain in May?
When it does not snow?
What is the average length of the day in May?
When is the sunrise / sunset in May in Rock Island?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Rock Island, TX
- Average high temperature in May: 84.4°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in May: 67.3°F
The month with the highest average low temperature is August (75°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in May
Rock Island, TX
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Rock Island, TX
- Average wind speed in May: 8.1mph
The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest month (with the lowest average wind speed) is September (5.9mph).
Average humidity in May
Rock Island, TX
- Average humidity in May: 78%
The months with the highest relative humidity are March, May and June (78%).
The month with the lowest relative humidity is August (69%).
Average rainfall in May
Rock Island, TX
- Average rainfall in May: 4.17"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in May
Rock Island, TX
- Average rainfall days in May: 16.1 days
The month with the highest number of rainy days is September (18.3 days).
The month with the least rainy days is January (10.4 days).
Average snowfall in May
Rock Island, TX
- Average snowfall in May: 0"
The months with the highest snowfall are January and December (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Rock Island, TX
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.4 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
Rock Island, TX
- Average daylight in May: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in May: 8h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in May
Rock Island, TX
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is September (9.1 days).
Average UV index in May
Rock Island, TX
- Average UV index in May: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in May
Rock Island, TX
- Average cloud cover in May: 45
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in May
Rock Island, TX
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, August, September, October, November and December (6mi).
The months with the lowest visibility are May, June and July (5mi).
Rock Island, Texas, USA
Weather forecast for your location
2. Allow the app to use your location