May weather forecastSeneca, SD
May
Weather in May
The last month of the spring, May, is a refreshing month in Seneca, South Dakota, with temperature in the range of an average low of 47.8°F (8.8°C) and an average high of 66.2°F (19°C).Temperature
Seneca's weather shows a temperature rise with the arrival of May, moving from a cool 54°F (12.2°C) in April to a refreshing 66.2°F (19°C). In the month of May, the average low-temperature usually rests at a frosty 47.8°F (8.8°C).Humidity
In Seneca, the average relative humidity in May is 64%.Rainfall
In Seneca, in May, during 13.7 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. In Seneca, during the entire year, the rain falls for 97.8 days and collects up to 16.65" (423mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Seneca aggregates 0.31" (8mm) of snow. Throughout the year, there are 59.7 snowfall days, and 19.96" (507mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 53min.On the first day of May, sunrise is at 6:25 am and sunset at 8:44 pm. On the last day of the month, sunrise is at 5:54 am and sunset at 9:17 pm CDT.
Sunshine
In May, the average sunshine is 9.1h.UV index
The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, a daily UV index of 5 turns into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Seneca, SD
- Average high temperature in May: 66.2°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (22.6°F).
- Average low temperature in May: 47.8°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).
Average pressure in May
Seneca, SD
- Average pressure in May: 29.92"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in May
Seneca, SD
- Average wind speed in May: 11mph
The windiest month (with the highest average wind speed) is April (11.8mph).
The calmest month (with the lowest average wind speed) is August (9.7mph).
Average humidity in May
Seneca, SD
- Average humidity in May: 64%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are August and September (56%).
Average rainfall in May
Seneca, SD
- Average rainfall in May: 2.32"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in May
Seneca, SD
- Average rainfall days in May: 13.7 days
The month with the highest number of rainy days is June (14.4 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in May
Seneca, SD
- Average snowfall in May: 0.31"
The month with the highest snowfall is February (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Seneca, SD
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Seneca, SD
- Average daylight in May: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 9h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in May
Seneca, SD
- Average sunshine days in May: 14.6 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in May
Seneca, SD
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in May
Seneca, SD
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 22).
Average visibility in May
Seneca, SD
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
