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 start of May signals a slight increase in the average high-temperature, moving from 75°F (23.9°C) in April to a still warm 81.7°F (27.6°C). Throughout the nights in May, an average low-temperature of 64°F (17.8°C) is noted.Heat index
May's mean heat index is computed to be a tropical 86°F (30°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.It is emphasized that the heat index's values are meant for shaded zones with mild winds. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', gauges the sensation of temperature factoring in the air's moisture content. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
In Fairfax, the average relative humidity in May is 75%.Rainfall
In Fairfax, in May, during 14.6 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, in Fairfax, South Carolina, there are 152.9 rainfall days, and 31.18" (792mm) of precipitation is accumulated.Snowfall
In Fairfax, snow does not fall in March through December.Daylight
The average length of the day in May is 13h and 52min.On the first day of the month, sunrise is at 6:36 am and sunset at 8:07 pm. On the last day of May, sunrise is at 6:17 am and sunset at 8:28 pm EDT.
Sunshine
In May, the average sunshine in Fairfax is 9.9h.UV index
In May, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: An average UV index of 6 in May transforms into this advice:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
What are May temperatures in Fairfax?
What is the average humidity in May in Fairfax?
How many days does it rain in May in Fairfax?
When it does not snow in Fairfax?
How many hours of daylight does Fairfax have in May?
When are sunrise and sunset in May in Fairfax?
How long on average sun shines in May in Fairfax?
What is the UV index reading in May in Fairfax?
Average temperature in May
Fairfax, SC
- Average high temperature in May: 81.7°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (55.4°F).
- Average low temperature in May: 64°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (39.9°F).
Average pressure in May
Fairfax, SC
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in May
Fairfax, SC
- Average wind speed in May: 6.7mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in May
Fairfax, SC
- Average humidity in May: 75%
The months with the highest relative humidity are August and December (76%).
The month with the lowest relative humidity is January (70%).
Average rainfall in May
Fairfax, SC
- Average rainfall in May: 2.8"
The wettest month (with the highest rainfall) is August (3.7").
The driest month (with the least rainfall) is November (1.38").
Average rainfall days in May
Fairfax, SC
- Average rainfall days in May: 14.6 days
The month with the highest number of rainy days is August (20.8 days).
The month with the least rainy days is November (6.6 days).
Average snowfall in May
Fairfax, SC
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in May
Fairfax, SC
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in May /
Average sunshine in May
Fairfax, SC
- 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: 9h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in May
Fairfax, SC
- Average sunshine days in May: 14.5 days
The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is August (7.3 days).
Average UV index in May
Fairfax, SC
- Average UV index in May: 6
The months with the highest UV index are 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
Fairfax, SC
- Average cloud cover in May: 34
The months with the most cloud cover are February and December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in May
Fairfax, SC
- 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).
Fairfax, South Carolina, USA
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