Duncan
Oklahoma, USA
Long-term weather forecast
Long-term weather forecast

June weather forecast and climate
Duncan, OK

June, the first month of the summer, in Duncan, is a tropical month, with average temperature ranging between max 90°F (32.2°C) and min 68°F (20°C).

Temperature

In June, the average high-temperature slightly increases, from a moderately hot 82°F (27.8°C) in May, to a tropical 90°F (32.2°C). In June, in Duncan, the average low-temperature is 68°F (20°C).

Heat index

The average heat index is appraised at a torrid 102.6°F (39.2°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, clothing, differences in body mass, height, and shape), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Duncan, the average relative humidity is 65%.

Rainfall

In Duncan, it is raining for 7.3 days, with typically 4.5" (114.3mm) of accumulated precipitation. In Duncan, during the entire year, the rain falls for 60.1 days and collects up to 33.1" (840.9mm) of precipitation.

Snowfall

In Duncan snow does not fall in May through November.

Daylight

June has the longest days of the year, with an average of 14.4h of daylight.

What is the temperature in June in Duncan?

The average high-temperature, in June, is 90°F (32.2°C), while the average low-temperature is 68°F (20°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that calculates temperature value influenced by the moisture in the air, in June is calculated to 102.6°F (39.2°C).

What is the average humidity in June in Duncan?

The average relative humidity in June in Duncan is 65%.

How much does it rain in Duncan in June?

In June, in Duncan, Oklahoma, the rain falls for 7.3 days. Throughout June, 4.5" (114.3mm) of precipitation is accumulated.

When it does not snow in Duncan?

In Duncan, Oklahoma, snow does not fall in May through November.

When are the longest days in Duncan?

With an average of 14.4h of daylight, June has the longest days of the year in Duncan, Oklahoma.

What is the average length of the day in June in Duncan?

In June, the average length of the day in Duncan is 14.4h.
Average temperature in June - Duncan, OK
  • Average high temperature in June: 90°F

The warmest month (with the highest average high temperature) is August (96°F).
The month with the lowest average high temperature is January (52°F).

  • Average low temperature in June: 68°F

Months with the highest average low temperature are July and August (71°F).
The coldest month (with the lowest average low temperature) is January (29°F).

Average humidity in June - Duncan, OK
  • Average humidity in June: 65%

The month with the highest relative humidity is January (70%).
Months with the lowest relative humidity are August and September (58%).

Average rainfall in June - Duncan, OK
  • Average rainfall in June: 4.5"

The wettest month (with the highest rainfall) is May (6.4").
The driest month (with the lowest rainfall) is January (1.4").

Average rainfall days in June - Duncan, OK
  • Average rainfall days in June: 7.3 days

The month with the highest number of rainy days is May (7.6 days).
The month with the lowest number of rainy days is November (2.9 days).

Average snowfall in June - Duncan, OK
  • Average snowfall in June: 0"

The month with the highest snowfall is February (2.2").
Months with the lowest snowfall are May, June, July, August, September, October and November (0").

Average daylight in June - Duncan, OK
  • Average daylight in June: 14.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).