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
With the transition into May, Altamont experiences an increase in average high-temperatures, moving up from a cool 53.2°F (11.8°C) in April to a refreshing 66.4°F (19.1°C). Throughout the month of May, Altamont sees a steady low-temperature average of 48.6°F (9.2°C).Humidity
In Altamont, South Dakota, the average relative humidity in May is 69%.Rainfall
In Altamont, South Dakota, in May, it is raining for 14.3 days, with typically 1.89" (48mm) of accumulated precipitation. In Altamont, during the entire year, the rain falls for 101.9 days and collects up to 14.61" (371mm) 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, Altamont aggregates 0.12" (3mm) of snow. In Altamont, during the entire year, snow falls for 49.9 days and aggregates up to 14.02" (356mm) of snow.Daylight
In May, the average length of the day is 14h and 52min.On the first day of the month, sunrise is at 6:15 am and sunset at 8:32 pm. On the last day of May, sunrise is at 5:43 am and sunset at 9:05 pm CDT.
Sunshine
In May, the average sunshine is 8.9h.UV index
In Altamont, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: During May, 5 as the daily maximum UV index converts into the following advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Altamont?
What is the average humidity in May in Altamont?
How many days does it rain in May in Altamont?
What is the last month it snows in Altamont?
What is the average length of the day in May in Altamont?
What time are sunrise and sunset in May in Altamont?
How long on average sun shines in May in Altamont?
What is the UV index intensity in May in Altamont?
Average temperature in May
Altamont, SD
- Average high temperature in May: 66.4°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (20.5°F).
- Average low temperature in May: 48.6°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (7.2°F).
Average pressure in May
Altamont, SD
- Average pressure in May: 29.93"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
Altamont, SD
- Average wind speed in May: 9.7mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in May
Altamont, SD
- Average humidity in May: 69%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (67%).
Average rainfall in May
Altamont, SD
- Average rainfall in May: 1.89"
The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in May
Altamont, SD
- Average rainfall days in May: 14.3 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is January (1.7 days).
Average snowfall in May
Altamont, SD
- Average snowfall in May: 0.12"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Altamont, SD
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Altamont, SD
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Altamont, SD
- Average sunshine days in May: 14.8 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in May
Altamont, 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
Altamont, SD
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in May
Altamont, 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).
Altamont, South Dakota, USA
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