January weather forecast
Duncan, OK

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Weather in January

January in Duncan, Oklahoma tends to be the coolest month of the year. The chill even extends to daylight, with January having the shortest daylight duration out of the entire year. The familiar sights of snowflakes can be observed on about 1.3 days, with the clouds covering 26% of the sky. Despite these conditions, the average maximum temperature registers at 51.3°F (10.7°C), with a minimum average dropping to a frigid 33.6°F (0.9°C). Cold winds sweep across the city at an average speed of 10.2mph (16.4km/h), adding a brisk nip to the air.

Temperature

In Duncan, January and December are characterised by the lowest temperatures, recording an average high of 51.3°F (10.7°C).

Humidity

In Duncan, Oklahoma, the average relative humidity in January is 61%.

Rainfall

In January, in Duncan, the rain falls for 5 days. Throughout January, 1.18" (30mm) of precipitation is accumulated. Throughout the year, in Duncan, there are 113.4 rainfall days, and 24.61" (625mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In Duncan, Oklahoma, in January, during 1.3 snowfall days, 0.79" (20mm) of snow is typically accumulated. Throughout the year, there are 5.1 snowfall days, and 3.03" (77mm) of snow is accumulated.

Daylight

In January, the average length of the day in Duncan is 10h and 10min.
On the first day of the month, sunrise is at 7:38 am and sunset at 5:32 pm. On the last day of January, in Duncan, sunrise is at 7:30 am and sunset at 6:00 pm CST.

Sunshine

In Duncan, the average sunshine in January is 6.3h.

UV index

In January, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 3 in January converts into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
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Frequently asked questions

What part of the year is the coldest in Duncan?

The yearly lowest temperatures occur in January and December, averaging a high-temperature of 51.3°F (10.7°C).

What is the temperature in January in Duncan?

The average high-temperature and low-temperature in Duncan, Oklahoma, during January are 51.3°F (10.7°C) and 33.6°F (0.9°C) respectively.

What is the average humidity in January in Duncan?

In Duncan, the average relative humidity in January is 61%.

How many days does it rain in January in Duncan?

In Duncan, Oklahoma, in January, it is raining for 5 days, with typically 1.18" (30mm) of accumulated precipitation.

How much does it snow in Duncan in January?

In Duncan, during January, snow falls for 1.3 days and regularly aggregates up to 0.79" (20mm) of snow.

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

The average day length in January is 10h and 10min.

What time are sunrise and sunset in January in Duncan?

In January, on the first day of the month, sunrise is at 7:38 am and sunset at 5:32 pm. On the last day of the month, in Duncan, sunrise is at 7:30 am and sunset at 6:00 pm CST.

How long on average sun shines in January in Duncan?

The average sunshine duration in January in Duncan, Oklahoma, is 6.3h.

What is the UV index reading in January in Duncan?

In January, the average daily maximum UV index in Duncan is 3. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Duncan, OK

Average temperature in January - Duncan, OK
  • Average high temperature in January: 51.3°F

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).

  • Average low temperature in January: 33.6°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 in January
Duncan, OK

Average pressure in January - Duncan, OK
  • Average pressure in January: 30.16"Hg

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 in January
Duncan, OK

Average wind speed in January - Duncan, OK
  • Average wind speed in January: 10.2mph

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 humidity in January
Duncan, OK

Average humidity in January - Duncan, OK
  • Average humidity in January: 61%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (55%).

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Average rainfall in January
Duncan, OK

Average rainfall in January - Duncan, OK
  • Average rainfall in January: 1.18"

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 in January
Duncan, OK

Average rainfall days in January - Duncan, OK
  • Average rainfall days in January: 5 days

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 in January
Duncan, OK

Average snowfall in January - Duncan, OK
  • Average snowfall in January: 0.79"

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 in January
Duncan, OK

Average snowfall days in January - Duncan, OK
  • Average snowfall days in January: 1.3 days

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 in January /
Average sunshine in January
Duncan, OK

Average daylight in January / Average sunshine in January - Duncan, OK
  • Average daylight in January: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in January: 6h and 2min

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 in January
Duncan, OK

Average sunshine days in January - Duncan, OK
  • Average sunshine days in January: 24.3 days

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 UV index in January
Duncan, OK

Average UV index in January - Duncan, OK
  • Average UV index in January: 3

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in January
Duncan, OK

Average cloud cover in January - Duncan, OK
  • Average cloud cover in January: 26

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 20).

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Average visibility in January
Duncan, OK

Average visibility in January - Duncan, OK
  • Average visibility in January: 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).

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Duncan, Oklahoma, USA

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