Climate and monthly weather forecast
Duncan, OK

Weather in January

January, the same as December, is another fresh winter month in Duncan, Oklahoma, with an average temperature ranging between min 33.6°F (0.9°C) and max 51.3°F (10.7°C). The coldest months are January and December, with an average high-temperature of 51.3°F (10.7°C). Weather in January »

Weather in February

February, the last month of the winter in Duncan, is another cool month, with an average temperature fluctuating between 37°F (2.8°C) and 54.3°F (12.4°C). In Duncan, the average high-temperature in February is relatively the same as in January - a still cool 54.3°F (12.4°C). Weather in February »

Weather in March

March, the first month of the spring in Duncan, is a comfortable month, with an average temperature varying between 46.4°F (8°C) and 64.9°F (18.3°C). In March, the average high-temperature increases from a cool 54.3°F (12.4°C) in February to a comfortable 64.9°F (18.3°C). Weather in March »

Weather in April

April is an agreeable spring month in Duncan, Oklahoma, with temperature in the range of an average high of 72.3°F (22.4°C) and an average low of 52.5°F (11.4°C). In Duncan, the average high-temperature in April marginally rises from an enjoyable 64.9°F (18.3°C) in March to a pleasant 72.3°F (22.4°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Duncan, Oklahoma, with an average temperature fluctuating between 60.4°F (15.8°C) and 79.3°F (26.3°C). In Duncan, the average high-temperature in May slightly increases from a pleasant 72.3°F (22.4°C) in April to a moderately hot 79.3°F (26.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a hot month in Duncan, Oklahoma, with temperature in the range of an average low of 70.7°F (21.5°C) and an average high of 89.8°F (32.1°C). In Duncan, the average high-temperature in June increases from a warm 79.3°F (26.3°C) in May to a tropical 89.8°F (32.1°C). Weather in June »

Weather in July

July, like June, is another tropical summer month in Duncan, Oklahoma, with temperature in the range of an average high of 94.6°F (34.8°C) and an average low of 73.9°F (23.3°C). In July, the average high-temperature is relatively the same as in June - a still tropical 94.6°F (34.8°C). Weather in July »

Weather in August

The last month of the summer, August, is a sweltering month in Duncan, Oklahoma, with temperature in the range of an average high of 95°F (35°C) and an average low of 73.6°F (23.1°C). August is the warmest month, with an average high-temperature of 95°F (35°C) and an average low-temperature of 73.6°F (23.1°C). In August, the average heat index is appraised at a blistering 108.9°F (42.7°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a hot month in Duncan, Oklahoma, with temperature in the range of an average low of 66.9°F (19.4°C) and an average high of 86.2°F (30.1°C). In September, the average high-temperature slightly decreases from a very hot 95°F (35°C) in August to a tropical 86.2°F (30.1°C). Weather in September »

Weather in October

October, like September, is an agreeable autumn month in Duncan, Oklahoma, with temperature in the range of an average low of 54.3°F (12.4°C) and an average high of 72.9°F (22.7°C). In October, the average high-temperature decreases from a tropical 86.2°F (30.1°C) in September to an agreeable 72.9°F (22.7°C). Weather in October »

Weather in November

The last month of the autumn, November, is another comfortable month in Duncan, Oklahoma, with an average temperature varying between 43.9°F (6.6°C) and 61.7°F (16.5°C). In November, the average high-temperature drops from a pleasant 72.9°F (22.7°C) in October to an enjoyable 61.7°F (16.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cool month in Duncan, Oklahoma, with temperature in the range of an average high of 51.3°F (10.7°C) and an average low of 35.8°F (2.1°C). The coldest months are January and December, with an average high-temperature of 51.3°F (10.7°C). Weather in December »
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FAQ

What are the coldest months in Duncan?

The coldest months in Duncan, Oklahoma, are January and December, with an average high-temperature of 51.3°F (10.7°C).

How much does it rain in Duncan?

Throughout the year, in Duncan, Oklahoma, there are 113.4 rainfall days, and 24.61" (625mm) of precipitation is accumulated.

When does it snow in Duncan?

January through April, November and December are months with snowfall.

How much does it snow in Duncan?

In Duncan, during the entire year, snow falls for 5.1 days and aggregates up to 3.03" (77mm) of snow.

What is the driest month in Duncan?

February is the month with the least rainfall. Rain falls for 6.8 days and accumulates 1.02" (26mm) of precipitation.

When does it snow the most in Duncan?

The month with the most snowfall in Duncan is February, when snow falls for 1.8 days and typically aggregates up to 1.3" (33mm) of snow.

When is Daylight Saving Time (DST) in Duncan?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Duncan, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

What is the most humid month in Duncan?

With an average relative humidity of 73%, May is the most humid month in Duncan.

What is the wettest month in Duncan?

May is the month with the most rainfall. Rain falls for 13.5 days and accumulates 4.37" (111mm) of precipitation.

When it does not snow in Duncan?

May through October are months without snowfall.

When are the longest days in Duncan?

With an average of 14h and 26min of daylight, June has the longest days of the year.

What is the month with the highest UV index in Duncan?

The months with the highest UV index in Duncan are June through August, with an average maximum UV index of 7.

What month has the most sunshine in Duncan?

The month with the most sunshine is July, with an average of 11.1h of sunshine.

What is the warmest month in Duncan?

The warmest month in Duncan is August, with an average high-temperature of 95°F (35°C) and an average low-temperature of 73.6°F (23.1°C).

What is the least humid month in Duncan?

With an average relative humidity of 55%, August is the least humid month in Duncan.

What is the month with the shortest days in Duncan?

With an average of 9h and 53min of daylight, December has the shortest days of the year in Duncan, Oklahoma.

What is the month with the least sunshine in Duncan?

December has the least sunshine of the year, with an average of 6h of sunshine.

What is the month with the lowest UV index in Duncan?

December is the month with the lowest UV index, with an average maximum UV index of 2.

Average temperature
Duncan, OK

Average temperature - Duncan, OK

The warmest month (with the highest average high temperature) is August (95°F).
The months with the lowest average high temperature are January and December (51.3°F).

The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).

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Average pressure
Duncan, OK

Average pressure - Duncan, OK

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed
Duncan, OK

Average wind speed - Duncan, OK

The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest months (with the lowest average wind speed) are July, August and September (8.3mph).

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Average rainfall
Duncan, OK

Average rainfall - Duncan, OK

The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is February (1.02").

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Average rainfall days
Duncan, OK

Average rainfall days - Duncan, OK

The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is January (5 days).

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Average snowfall
Duncan, OK

Average snowfall - Duncan, OK

The month with the highest snowfall is February (1.3").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
Duncan, OK

Average snowfall days - Duncan, OK

The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Duncan, OK

Average daylight / Average sunshine - Duncan, OK

The month with the longest days is June (Average daylight: 14h and 26min).
The month with the shortest days is December (Average daylight: 9h and 53min).

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days
Duncan, OK

Average sunshine days - Duncan, OK

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is May (15.7 days).

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Average visibility
Duncan, OK

Average visibility - Duncan, OK

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).

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