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 soft shift in the average high-temperature is noticeable in May, transitioning from an agreeable 71.8°F (22.1°C) in April to a moderately hot 80.1°F (26.7°C). In San Mateo, the average temperature during the nights of May drops to a moderate 59.2°F (15.1°C).Humidity
In May, the average relative humidity is 75%.Rainfall
In May, the rain falls for 13.2 days. Throughout May, 2.17" (55mm) of precipitation is accumulated. Throughout the year, there are 136.3 rainfall days, and 19.02" (483mm) of precipitation is accumulated.Snowfall
In San Mateo, snow does not fall in April through November.Daylight
The average length of the day in May is 13h and 59min.On the first day of May, sunrise is at 6:39 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 8:38 pm EDT.
Sunshine
In May, the average sunshine is 9.7h.UV index
The average daily maximum UV index in May is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.Note: In May, the maximum UV index of 6 suggests this advice:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
How many hours of daylight does San Mateo have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does San Mateo have in May?
How high is the UV index in May?
Average temperature in May
San Mateo, SC
- Average high temperature in May: 80.1°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (50.2°F).
- Average low temperature in May: 59.2°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (34.5°F).
Average pressure in May
San Mateo, SC
- Average pressure in May: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in May
San Mateo, SC
- Average wind speed in May: 5.6mph
The windiest month (with the highest average wind speed) is February (7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in May
San Mateo, SC
- Average humidity in May: 75%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (69%).
Average rainfall in May
San Mateo, SC
- Average rainfall in May: 2.17"
The wettest month (with the highest rainfall) is August (2.28").
The driest month (with the least rainfall) is September (0.79").
Average rainfall days in May
San Mateo, SC
- Average rainfall days in May: 13.2 days
The month with the highest number of rainy days is July (15.4 days).
The month with the least rainy days is October (7.2 days).
Average snowfall in May
San Mateo, SC
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in May
San Mateo, SC
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in May /
Average sunshine in May
San Mateo, SC
- Average daylight in May: 14h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in May: 9h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in May
San Mateo, SC
- Average sunshine days in May: 15.5 days
The month with the most sunshine days is October (22.6 days).
The month with the least sunshine days is July (14.3 days).
Average UV index in May
San Mateo, SC
- Average UV index in May: 6
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in May
San Mateo, SC
- Average cloud cover in May: 36
The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in May
San Mateo, SC
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
San Mateo, South Carolina, USA
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