January weather forecast
Griffen, IA

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Weather in January

January, the same as December, in Griffen, Iowa, is another subzero cold winter month, with an average temperature fluctuating between 13.1°F (-10.5°C) and 26.4°F (-3.1°C).

Temperature

Griffen's coldest temperatures are experienced in January, with average high temperatures of 26.4°F (-3.1°C) and lows of 13.1°F (-10.5°C).

Humidity

The most humid month in Griffen is January, with an average relative humidity of 84%.

Rainfall

January is the month with the least rainfall in Griffen. Rain falls for 3.9 days and accumulates 0.67" (17mm) of precipitation.

Snowfall

Months with snowfall in Griffen are January through May, October through December. In Griffen, Iowa, in January, snow falls for 10.9 days, with typically accumulated 2.91" (74mm) of snow. In Griffen, during the entire year, snow falls for 39.9 days and aggregates up to 10.91" (277mm) of snow.

Daylight

The average length of the day in January is 9h and 31min.
On the first day of January, sunrise is at 7:43 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:27 pm CST.

Sunshine

The month with the least sunshine is January, with an average of 4h of sunshine.

UV index

The months with the lowest UV index in Griffen are January, February, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 2 in January converts into the following recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Frequently asked questions

What is the coldest time of year in Griffen?

January, recording an average high temperature of 26.4°F (-3.1°C) and a low temperature of 13.1°F (-10.5°C), is Griffen's coldest month.

How cold is it in Griffen in January?

In January, the average high-temperature and low-temperature in Griffen, Iowa, are 26.4°F (-3.1°C) and 13.1°F (-10.5°C) respectively.

What is the most humid month in Griffen?

January is the most humid month, with an average relative humidity of 84%.

What is the average humidity in January in Griffen?

The average relative humidity in January in Griffen, Iowa, is 84%.

What is the driest month in Griffen?

January is the month with the least rainfall in Griffen, Iowa. Rain falls for 3.9 days and accumulates 0.67" (17mm) of precipitation.

How many days does it rain in January in Griffen?

In Griffen, Iowa, in January, it is raining for 3.9 days, with typically 0.67" (17mm) of accumulated precipitation.

How many days does it snow in January in Griffen?

In Griffen, during January, snow falls for 10.9 days and regularly aggregates up to 2.91" (74mm) of snow.

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

In Griffen, Iowa, the average day length in January is 9h and 31min.

When are sunrise and sunset in January in Griffen?

On the first day of January, sunrise is at 7:43 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:27 pm CST.

What is the month with the least sunshine in Griffen?

January has the least sunshine of the year, with an average of 4h of sunshine.

How many hours of sunshine does Griffen have in January?

In January, the average sunshine duration in Griffen, Iowa, is 4h.

When is the lowest UV index in Griffen?

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index intensity in January in Griffen?

In Griffen, Iowa, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
32.2°F 0.1°C
26.4°F -3.1°C
30.6°F -0.8°C
Average low temperature
21°F -6.1°C
13.1°F -10.5°C
17.1°F -8.3°C
Average pressure
30.12" 765mmHg
30.16" 766mmHg
30.14" 766mmHg
Average wind speed
10.1mph 16.3km/h
10.5mph 16.9km/h
10.5mph 16.9km/h
Average max. wind speed
10.8mph 17.4km/h
11.2mph 18km/h
11.2mph 18km/h
Average wind speed gusts
15.8mph 25.4km/h
16.7mph 26.9km/h
16.4mph 26.4km/h
Average humidity
81%
84%
83%
Average rainfall
0.87" 22mm
0.67" 17mm
0.79" 20mm
Average rainfall days
4.7
3.9
3.2
Average snowfall
1.73" 44mm
2.91" 74mm
3.07" 78mm
Average snowfall days
8.6
10.9
9.2
Average daylight
9h 1min
9h 3min
10h 4min
Average sunshine
4h 4min
4h 0min
4h 4min
Average sunshine days
19
18.4
15.7
Average UV index
2
2
2
Average cloud cover
52%
56%
52%
Average visibility
6mi 9.7km
5mi 8km
6mi 9.7km

Average temperature in January
Griffen, IA

Average temperature in January - Griffen, IA
  • Average high temperature in January: 26.4°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (26.4°F).

  • Average low temperature in January: 13.1°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).

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Average pressure in January
Griffen, IA

Average pressure in January - Griffen, IA
  • 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
Griffen, IA

Average wind speed in January - Griffen, IA
  • Average wind speed in January: 10.5mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity in January
Griffen, IA

Average humidity in January - Griffen, IA
  • Average humidity in January: 84%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in January
Griffen, IA

Average rainfall in January - Griffen, IA
  • Average rainfall in January: 0.67"

The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (0.67").

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Average rainfall days in January
Griffen, IA

Average rainfall days in January - Griffen, IA
  • Average rainfall days in January: 3.9 days

The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (3.2 days).

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Average snowfall in January
Griffen, IA

Average snowfall in January - Griffen, IA
  • Average snowfall in January: 2.91"

The month with the highest snowfall is February (3.07").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Griffen, IA

Average snowfall days in January - Griffen, IA
  • Average snowfall days in January: 10.9 days

The month with the highest number of snowfall days is January (10.9 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
Griffen, IA

Average daylight in January / Average sunshine in January - Griffen, IA
  • Average daylight in January: 9h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in January: 4h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in January
Griffen, IA

Average sunshine days in January - Griffen, IA
  • Average sunshine days in January: 18.4 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is June (10.5 days).

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Average UV index in January
Griffen, IA

Average UV index in January - Griffen, IA
  • Average UV index in January: 2

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

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Average cloud cover in January
Griffen, IA

Average cloud cover in January - Griffen, IA
  • Average cloud cover in January: 56

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 30).

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Average visibility in January
Griffen, IA

Average visibility in January - Griffen, IA
  • Average visibility in January: 5mi

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

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Griffen, Iowa, USA

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