Pierre
South Dakota, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Pierre, SD

The Capitol Dome building in Pierre, South Dakota, set in a beautiful tree park, reflected in the waterfront
The Capitol Dome building in Pierre, South Dakota, set in a beautiful tree park, reflected in the waterfront
May, the last month of the spring, in Pierre, is a pleasant month, with average temperature fluctuating between 68°F (20°C) and 49.6°F (9.8°C).

Temperature

In Pierre, the average high-temperature increases, from a moderate 56.1°F (13.4°C) in April, to a pleasant 68°F (20°C). In May, in Pierre, the average low-temperature is 49.6°F (9.8°C).

Humidity

In May, the average relative humidity is 62%.

Rainfall

May is the month with the most rainfall. Rain falls for 13.6 days and accumulates 2.24" (57mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Pierre, South Dakota. During 0.1 snowfall days, in May, Pierre aggregates 0.08" (2mm) of snow. In Pierre, during the entire year, snow falls for 41.4 days, and aggregates up to 13.07" (332mm) of snow.

Daylight

The average length of the day in Pierre is 14.8h.

Sunshine

The average sunshine in May is 9.6h.

UV index

The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in May in Pierre?

The average high-temperature, in May, is 68°F (20°C), while the average low-temperature is 49.6°F (9.8°C).

What is the average humidity in May in Pierre?

In Pierre, South Dakota, the average relative humidity in May is 62%.

How much does it rain in Pierre in May?

In May, in Pierre, the rain falls for 13.6 days. Throughout May, 2.24" (57mm) of precipitation is accumulated.

What is the wettest month in Pierre?

The month with the most rainfall in Pierre is May when the rain falls for 13.6 days and typically aggregates up to 2.24" (57mm) of precipitation.

What is the last month it snows in Pierre?

May is the last month it regularly snows in Pierre. During 0.1 snowfall days, in May, Pierre aggregates 0.08" (2mm) of snow.

What is the average length of the day in May in Pierre?

In May, the average length of the day in Pierre, South Dakota, is 14.8h.

How long on average sun shines in May in Pierre?

In May, the average sunshine is 9.6h.

How high is the UV index in May in Pierre?

In Pierre, South Dakota, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in May - Pierre, SD
  • Average high temperature in May: 20°C

The warmest month (with the highest average high temperature) is July (31.5°C).
The month with the lowest average high temperature is January (-3.2°C).

  • Average low temperature in May: 9.8°C

The month with the highest average low temperature is July (19.7°C).
The coldest month (with the lowest average low temperature) is January (-10.8°C).

Average humidity in May - Pierre, SD
  • Average humidity in May: 62%

The month with the highest relative humidity is January (85%).
Months with the lowest relative humidity are August and September (52%).

Average rainfall in May - Pierre, SD
  • Average rainfall in May: 57mm

The wettest month (with the highest rainfall) is May (57mm).
The driest month (with the lowest rainfall) is January (9mm).

Average rainfall days in May - Pierre, SD
  • Average rainfall days in May: 13.6 days

The month with the highest number of rainy days is June (14.2 days).
The month with the lowest number of rainy days is February (2.4 days).

Average snowfall in May - Pierre, SD
  • Average snowfall in May: 2mm

The month with the highest snowfall is February (93mm).
Months with the lowest snowfall are June, July, August and September (0mm).

Average snowfall days in May - Pierre, SD
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is February (10 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in May / Average sunshine in May - Pierre, SD
  • Average daylight in May: 14.8h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).

  • Average sunshine in May: 9.6h

The month with most sunshine is July (Average sunshine: 11.5h).
The month with least sunshine is January (Average sunshine: 4.6h).

Average UV index in May - Pierre, SD
  • Average UV index in May: 5

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are February and December (UV index 1).