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 May, the average high-temperature increases from a moderate 57.7°F (14.3°C) in April to a pleasant 68.5°F (20.3°C). Fairfax records a steady low-temperature average of 50.4°F (10.2°C) during May.Humidity
In May, the average relative humidity is 69%.Rainfall
The month with the most rainfall in Fairfax is May, when the rain falls for 15.3 days and typically aggregates up to 2.72" (69mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Fairfax, the average length of the day in May is 14h and 41min.On the first day of the month, sunrise is at 6:27 am and sunset at 8:37 pm. On the last day of May, in Fairfax, sunrise is at 5:59 am and sunset at 9:07 pm CDT.
Sunshine
In Fairfax, the average sunshine in May is 9h.UV index
In Fairfax, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 5 during May leads to these instructions:
Guard yourself - Avoiding sunburn is suggested. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Fairfax?
What is the average humidity in May in Fairfax?
What is the rainiest month in Fairfax?
How many days does it rain in May in Fairfax?
When it does not snow in Fairfax?
Does it snow in Fairfax in May?
What is the average length of the day in May in Fairfax?
What time are sunrise and sunset in May in Fairfax?
How many hours of sunshine does Fairfax have in May?
What is the UV index intensity in May in Fairfax?
Average temperature in May
Fairfax, SD
- Average high temperature in May: 68.5°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in May: 50.4°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in May
Fairfax, SD
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in May
Fairfax, SD
- Average wind speed in May: 9.6mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in May
Fairfax, SD
- Average humidity in May: 69%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (62%).
Average rainfall in May
Fairfax, SD
- Average rainfall in May: 2.72"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is February (0.31").
Average rainfall days in May
Fairfax, SD
- Average rainfall days in May: 15.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in May
Fairfax, SD
- Average snowfall in May: 0"
The months with the highest snowfall are January and March (1.93").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Fairfax, SD
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Fairfax, SD
- Average daylight in May: 14h and 4min
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 6min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in May
Fairfax, SD
- Average sunshine days in May: 13.3 days
The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in May
Fairfax, 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 2).
Average cloud cover in May
Fairfax, SD
- Average cloud cover in May: 39
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility in May
Fairfax, 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).
Fairfax, South Dakota, USA
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