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 sees a temperature increase, moving from a cool 51.8°F (11°C) in April to an enjoyable 65.7°F (18.7°C). During May, Hecla records an average temperature of 48.2°F (9°C) at night.Humidity
In Hecla, South Dakota, the average relative humidity in May is 66%.Rainfall
In Hecla, in May, it is raining for 15.2 days, with typically 2.52" (64mm) of accumulated precipitation. In Hecla, during the entire year, the rain falls for 109.5 days and collects up to 20.39" (518mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Hecla. During 0.4 snowfall days, in May, Hecla aggregates 0.24" (6mm) of snow. In Hecla, during the entire year, snow falls for 68.5 days and aggregates up to 22.83" (580mm) of snow.Daylight
In Hecla, South Dakota, the average length of the day in May is 14h and 58min.On the first day of May in Hecla, sunrise is at 6:18 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 9:15 pm CDT.
Sunshine
In May, the average sunshine is 9h.UV index
In May, the average daily maximum UV index in Hecla is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the average May temperature in Hecla?
What is the average humidity in May in Hecla?
How many days does it rain in May in Hecla?
What is the last month it snows in Hecla?
What is the average length of the day in May in Hecla?
When is the sunrise / sunset in May in Hecla?
How many hours of sunshine does Hecla have in May?
What is the UV index intensity in May in Hecla?
Average temperature in May
Hecla, SD
- Average high temperature in May: 65.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (19°F).
- Average low temperature in May: 48.2°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in May
Hecla, SD
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in May
Hecla, SD
- Average wind speed in May: 9.9mph
The windiest month (with the highest average wind speed) is October (10.8mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in May
Hecla, SD
- Average humidity in May: 66%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are August and September (62%).
Average rainfall in May
Hecla, SD
- Average rainfall in May: 2.52"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in May
Hecla, SD
- Average rainfall days in May: 15.2 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (2.4 days).
Average snowfall in May
Hecla, SD
- Average snowfall in May: 0.24"
The month with the highest snowfall is December (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Hecla, SD
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Hecla, SD
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Hecla, SD
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in May
Hecla, SD
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and November (UV index 1).
Average cloud cover in May
Hecla, SD
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in May
Hecla, SD
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
Hecla, South Dakota, USA
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