January weather forecast
Gretna, NE

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Weather in January

January is typically the wettest and coldest month in Gretna, Nebraska, with the thermal mercury often plunging to a chilling 17.1°F (-8.3°C) while the highest temperature often reaches 30.6°F (-0.8°C). It is a month of frosty mornings and wintry landscapes, while evenings may see soft snowfall. This snow blanket adds to the icy beauty of Gretna. With short daylight hours, the weather may invite you to curl up with a hot cup of cocoa indoors, while soaking up serene views of an enchanting winter wonderland.

Temperature

January, with an average high of 30.6°F (-0.8°C) and a low of 17.1°F (-8.3°C), signifies the coldest month of the year in Gretna.

Humidity

The most humid month in Gretna is January, with an average relative humidity of 80%.

Rainfall

The months with the least rainfall in Gretna are January and February Rain falls for 4 days and accumulates 0.63" (16mm) of rain.

Snowfall

Months with snowfall are January through May, October through December. In Gretna, in January, snow falls for 8.5 days, with typically accumulated 2.05" (52mm) of snow. In Gretna, Nebraska, during the entire year, snow falls for 30 days and aggregates up to 9.65" (245mm) of snow.

Daylight

In January, the average length of the day is 9h and 37min.
On the first day of the month, sunrise is at 7:50 am and sunset at 5:06 pm. On the last day of January, sunrise is at 7:36 am and sunset at 5:39 pm CST.

Sunshine

The month with the least sunshine is January, with an average of 4.9h of sunshine.

UV index

The months with the lowest UV index in Gretna, Nebraska, are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In January, the maximum UV index of 2 suggests this advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
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Frequently asked questions

What month is the coldest in Gretna?

January tends to be the coldest month in Gretna, with temperatures averaging a daily high of 30.6°F (-0.8°C) and a low of 17.1°F (-8.3°C).

How cold is it in Gretna in January?

The high-temperature during January is 30.6°F (-0.8°C) and the low-temperature is 17.1°F (-8.3°C).

What is the most humid month in Gretna?

With an average relative humidity of 80%, January is the most humid month in Gretna.

What is the average humidity in January in Gretna?

The average relative humidity in January in Gretna is 80%.

What is the driest month in Gretna?

The months with the least rainfall in Gretna, Nebraska, are January and February Rain falls for 4 days and accumulates 0.63" (16mm) of rain.

How many days does it rain in January in Gretna?

In Gretna, in January, it is raining for 4 days, with typically 0.63" (16mm) of accumulated precipitation.

How much does it snow in Gretna in January?

In Gretna, in January, snow falls for 8.5 days, with typically accumulated 2.05" (52mm) of snow.

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

In Gretna, Nebraska, the average day length in January is 9h and 37min.

When is the sunrise / sunset in January in Gretna?

On the first day of January in Gretna, sunrise is at 7:50 am and sunset at 5:06 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 5:39 pm CST.

What is the month with the least sunshine in Gretna?

The month with the least sunshine in Gretna, Nebraska, is January, with an average of 4.9h of sunshine.

How long on average sun shines in January in Gretna?

In Gretna, Nebraska, the average sunshine duration in January is 4.9h.

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

The months with the lowest UV index in Gretna are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in January in Gretna?

The average daily maximum UV index in January in Gretna is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
34.7°F 1.5°C
30.6°F -0.8°C
35.1°F 1.7°C
Average low temperature
22.3°F -5.4°C
17.1°F -8.3°C
20.3°F -6.5°C
Average pressure
30.13" 765mmHg
30.16" 766mmHg
30.14" 766mmHg
Average wind speed
9.7mph 15.6km/h
9.9mph 15.9km/h
10.1mph 16.3km/h
Average max. wind speed
10.4mph 16.7km/h
10.7mph 17.2km/h
10.9mph 17.5km/h
Average wind speed gusts
15.7mph 25.3km/h
16.2mph 26.1km/h
15.9mph 25.6km/h
Average humidity
76%
80%
77%
Average rainfall
1.3" 33mm
0.63" 16mm
0.63" 16mm
Average rainfall days
4.6
4
2.9
Average snowfall
1.81" 46mm
2.05" 52mm
2.2" 56mm
Average snowfall days
6.5
8.5
7.2
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
5h 1min
4h 5min
5h 4min
Average sunshine days
20.7
19.2
17.9
Average UV index
2
2
2
Average cloud cover
43%
47%
44%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Gretna, NE

Average temperature in January - Gretna, NE
  • Average high temperature in January: 30.6°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in January: 17.1°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in January
Gretna, NE

Average pressure in January - Gretna, NE
  • 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 (29.86"Hg).

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Average wind speed in January
Gretna, NE

Average wind speed in January - Gretna, NE
  • Average wind speed in January: 9.9mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).

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Average humidity in January
Gretna, NE

Average humidity in January - Gretna, NE
  • Average humidity in January: 80%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (65%).

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Average rainfall in January
Gretna, NE

Average rainfall in January - Gretna, NE
  • Average rainfall in January: 0.63"

The wettest month (with the highest rainfall) is June (3.7").
The driest months (with the least rainfall) are January and February (0.63").

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Average rainfall days in January
Gretna, NE

Average rainfall days in January - Gretna, NE
  • Average rainfall days in January: 4 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (2.9 days).

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Average snowfall in January
Gretna, NE

Average snowfall in January - Gretna, NE
  • Average snowfall in January: 2.05"

The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Gretna, NE

Average snowfall days in January - Gretna, NE
  • Average snowfall days in January: 8.5 days

The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Gretna, NE

Average daylight in January / Average sunshine in January - Gretna, NE
  • Average daylight in January: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).

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Average sunshine days in January
Gretna, NE

Average sunshine days in January - Gretna, NE
  • Average sunshine days in January: 19.2 days

The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is June (11.3 days).

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Average UV index in January
Gretna, NE

Average UV index in January - Gretna, NE
  • Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in January
Gretna, NE

Average cloud cover in January - Gretna, NE
  • Average cloud cover in January: 47

The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 25).

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Average visibility in January
Gretna, NE

Average visibility in January - Gretna, NE
  • 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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Gretna, Nebraska, USA

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