June weather forecast
Duncan, IA

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Weather in June

June, the first month of the summer in Duncan, is a moderately hot month, with an average temperature varying between 61.3°F (16.3°C) and 77.5°F (25.3°C).

Temperature

As June arrives, Duncan's weather shows an increase in high-temperatures, moving from May's pleasant 68°F (20°C) to a moderately hot 77.5°F (25.3°C). June brings with it a nighttime average temperature of 61.3°F (16.3°C).

Humidity

In Duncan, Iowa, the average relative humidity in June is 78%.

Rainfall

June is the month with the most rainfall. Rain falls for 17.8 days and accumulates 3.82" (97mm) of precipitation.

Snowfall

In Duncan, snow does not fall in June through September.

Daylight

June has the longest days of the year, with an average of 15h and 18min of daylight.
On the first day of the month, sunrise is at 5:37 am and sunset at 8:48 pm. On the last day of June, sunrise is at 5:39 am and sunset at 8:58 pm CDT.

Sunshine

In Duncan, the average sunshine in June is 9.4h.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 6 in June interprets into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Updated: Jun 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are June temperatures?

Duncan in June has an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 61.3°F (16.3°C).

What is the average humidity in June?

In Duncan, the average relative humidity in June is 78%.

What is the wettest month?

June is the month with the most rainfall. Rain falls for 17.8 days and accumulates 3.82" (97mm) of precipitation.

How many days does it rain in June in Duncan?

In Duncan, in June, during 17.8 rainfall days, 3.82" (97mm) of precipitation is typically accumulated.

When it does not snow?

June through September are months without snowfall.

Does it snow in June?

In June, in Duncan, it doesn't snow. May is the latest month when it typically snows.

When are the longest days?

With an average of 15h and 18min of daylight, June has the longest days of the year.

How many hours of daylight does Duncan have in June?

In Duncan, the average day length in June is 15h and 19min.

When is the sunrise / sunset in June?

On the first day of June, sunrise is at 5:37 am and sunset at 8:48 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:58 pm CDT.

How long on average sun shines in June?

In June, the average sunshine duration in Duncan is 9.4h.

When is the highest UV index?

June and July, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in June?

In Duncan, the average daily maximum UV index in June is 6. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Duncan, IA

Average temperature in June - Duncan, IA
  • Average high temperature in June: 77.5°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (22.8°F).

  • Average low temperature in June: 61.3°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (10.4°F).

Average pressure in June
Duncan, IA

Average pressure in June - Duncan, IA
  • Average pressure in June: 29.88"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in June
Duncan, IA

Average wind speed in June - Duncan, IA
  • Average wind speed in June: 8.5mph

The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).

Average humidity in June
Duncan, IA

Average humidity in June - Duncan, IA
  • Average humidity in June: 78%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (69%).

Average rainfall in June
Duncan, IA

Average rainfall in June - Duncan, IA
  • Average rainfall in June: 3.82"

The wettest month (with the highest rainfall) is June (3.82").
The driest month (with the least rainfall) is January (0.94").

Average rainfall days in June
Duncan, IA

Average rainfall days in June - Duncan, IA
  • Average rainfall days in June: 17.8 days

The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (2.8 days).

Average snowfall in June
Duncan, IA

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

The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in June
Duncan, IA

Average snowfall days in June - Duncan, IA
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in June /
Average sunshine in June
Duncan, IA

Average daylight in June / Average sunshine in June - Duncan, IA
  • Average daylight in June: 15h and 2min

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 June: 9h and 2min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in June
Duncan, IA

Average sunshine days in June - Duncan, IA
  • Average sunshine days in June: 10.4 days

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (10.4 days).

Average UV index in June
Duncan, IA

Average UV index in June - Duncan, IA
  • Average UV index in June: 6

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in June
Duncan, IA

Average cloud cover in June - Duncan, IA
  • Average cloud cover in June: 37

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 32).

Average visibility in June
Duncan, IA

Average visibility in June - Duncan, IA
  • Average visibility in June: 6mi

The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).

Duncan, Iowa, USA

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