May weather forecastPorcupine, SD
May
Weather in May
May, the last month of the spring in Porcupine, is an enjoyable month, with an average temperature fluctuating between 46.9°F (8.3°C) and 66.2°F (19°C).Temperature
As April transitions into May, a change in temperatures is observed, with average highs moving from a mild 55.9°F (13.3°C) to a comfortable 66.2°F (19°C). Throughout May, the nighttime temperature averages to a frosty 46.9°F (8.3°C).Humidity
In May, the average relative humidity is 62%.Rainfall
May is the month with the most rainfall. Rain falls for 13.1 days and accumulates 2.13" (54mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows in Porcupine. During 1.2 snowfall days, in May, Porcupine aggregates 2.17" (55mm) of snow. Throughout the year, in Porcupine, there are 47.4 snowfall days, and 22.72" (577mm) of snow is accumulated.Daylight
In Porcupine, South Dakota, the average length of the day in May is 14h and 42min.On the first day of the month, sunrise is at 5:41 am and sunset at 7:51 pm. On the last day of May, sunrise is at 5:12 am and sunset at 8:22 pm MDT.
Sunshine
In Porcupine, South Dakota, the average sunshine in May is 9.6h.UV index
In Porcupine, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, a daily maximum UV index of 5 leads to the following instructions:
Make use of precautions - It is urged to ward off sun damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Porcupine, SD
- Average high temperature in May: 66.2°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in May: 46.9°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in May
Porcupine, SD
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in May
Porcupine, SD
- Average wind speed in May: 11.4mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (10.2mph).
Average humidity in May
Porcupine, SD
- Average humidity in May: 62%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).
Average rainfall in May
Porcupine, SD
- Average rainfall in May: 2.13"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in May
Porcupine, SD
- Average rainfall days in May: 13.1 days
The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are February and December (2.5 days).
Average snowfall in May
Porcupine, SD
- Average snowfall in May: 2.17"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Porcupine, SD
- Average snowfall days in May: 1.2 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Porcupine, SD
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 9h and 36min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in May
Porcupine, SD
- Average sunshine days in May: 15.5 days
The month with the most sunshine days is September (22.8 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in May
Porcupine, SD
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Porcupine, SD
- Average cloud cover in May: 36
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in May
Porcupine, SD
- 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).
