May weather forecastSaint Johns, TN
May
Weather in May
May, the last month of the spring in Saint Johns, is a warm month, with temperature in the range of an average high of 77.5°F (25.3°C) and an average low of 58.5°F (14.7°C).Temperature
The shift into May is characterized by a subtle rise in the average high-temperature, transitioning from April's agreeable 69.4°F (20.8°C) to a moderately hot 77.5°F (25.3°C). Saint Johns's nighttime temperature during May is consistently averaged at a mild 58.5°F (14.7°C).Humidity
The average relative humidity in May is 77%.Rainfall
In May, the rain falls for 12.7 days. Throughout May, 1.06" (27mm) of precipitation is accumulated. Throughout the year, there are 123.1 rainfall days, and 12.76" (324mm) of precipitation is accumulated.Snowfall
In Saint Johns, snow does not fall in April through October.Daylight
In Saint Johns, the average length of the day in May is 14h and 5min.On the first day of May, sunrise is at 5:51 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 5:29 am and sunset at 7:55 pm CDT.
Sunshine
In Saint Johns, the average sunshine in May is 9.5h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in May converts into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. 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
Average temperature in May
Saint Johns, TN
- Average high temperature in May: 77.5°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in May: 58.5°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in May
Saint Johns, TN
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in May
Saint Johns, TN
- Average wind speed in May: 6mph
The windiest month (with the highest average wind speed) is February (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity in May
Saint Johns, TN
- Average humidity in May: 77%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (74%).
Average rainfall in May
Saint Johns, TN
- Average rainfall in May: 1.06"
The wettest month (with the highest rainfall) is February (1.5").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days in May
Saint Johns, TN
- Average rainfall days in May: 12.7 days
The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is November (7.3 days).
Average snowfall in May
Saint Johns, TN
- 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 and October (0").
Average snowfall days in May
Saint Johns, TN
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Saint Johns, TN
- Average daylight in May: 14h and 6min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in May: 9h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
Saint Johns, TN
- Average sunshine days in May: 15.1 days
The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in May
Saint Johns, TN
- Average UV index in May: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in May
Saint Johns, TN
- Average cloud cover in May: 36
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in May
Saint Johns, TN
- 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).
