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
In Alpena, the onset of May comes with an increased average high-temperature, moving from April's refreshing 55.9°F (13.3°C) to a comfortable 67.6°F (19.8°C). In May, Alpena's temperature tends to fall to an average low of 48.9°F (9.4°C) during the night.Humidity
In May, the average relative humidity in Alpena is 68%.Rainfall
In May, the rain falls for 13.6 days. Throughout May, 2.36" (60mm) of precipitation is accumulated. Throughout the year, there are 101.8 rainfall days, and 18.19" (462mm) of precipitation is accumulated.Snowfall
In Alpena, snow does not fall in May through September.Daylight
In Alpena, the average length of the day in May is 14h and 47min.On the first day of May in Alpena, sunrise is at 6:23 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 9:09 pm CDT.
Sunshine
In May, the average sunshine is 9.1h.UV index
In May, the average daily maximum UV index in Alpena, South Dakota, is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: A maximum high UV index of 5 in May translates into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Frequently asked questions
What is the temperature in May in Alpena?
What is the average humidity in May in Alpena?
How many days does it rain in May in Alpena?
When it does not snow in Alpena?
Does it snow in Alpena in May?
What is the average length of the day in May in Alpena?
What time are sunrise and sunset in May in Alpena?
How many hours of sunshine does Alpena have in May?
How high is the UV index in May in Alpena?
Average temperature in May
Alpena, SD
- Average high temperature in May: 67.6°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (23.2°F).
- Average low temperature in May: 48.9°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (8.2°F).
Average pressure in May
Alpena, 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
Alpena, SD
- Average wind speed in May: 9.8mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (8.6mph).
Average humidity in May
Alpena, SD
- Average humidity in May: 68%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (62%).
Average rainfall in May
Alpena, SD
- Average rainfall in May: 2.36"
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
Alpena, SD
- Average rainfall days in May: 13.6 days
The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (1.8 days).
Average snowfall in May
Alpena, SD
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Alpena, SD
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is December (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Alpena, 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: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Alpena, SD
- Average sunshine days in May: 14.6 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in May
Alpena, 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 and November (UV index 1).
Average cloud cover in May
Alpena, SD
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 22).
Average visibility in May
Alpena, 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).
Alpena, South Dakota, USA
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