January weather forecast
Diagonal, IA

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Weather in January

January, like December, is another subzero cold winter month in Diagonal, Iowa, with an average temperature ranging between min 16.9°F (-8.4°C) and max 30.6°F (-0.8°C).

Temperature

The coldest time of the year is January, with temperatures averaging a high of 30.6°F (-0.8°C) and a low of 16.9°F (-8.4°C).

Humidity

In January, the average relative humidity is 80%.

Rainfall

In Diagonal, during January, the rain falls for 4.1 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, there are 126.9 rainfall days, and 22.6" (574mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. January is the month with the most snowfall. Snow falls for 8.4 days and accumulates 3.54" (90mm) of snow.

Daylight

The average length of the day in January in Diagonal is 9h and 38min.
On the first day of January in Diagonal, sunrise is at 7:41 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:32 pm CST.

Sunshine

The month with the least sunshine in Diagonal is January, with an average of 4.6h of sunshine.

UV index

The month with the lowest UV index is January, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In January, the UV index of 1 transforms into the following advice:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. To avoid the Sun's strongest rays, limit exposure around the mid-day period. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Frequently asked questions

What time of the year is the coldest in Diagonal?

In Diagonal, January is the coldest month, with temperatures averaging a high of 30.6°F (-0.8°C) and a low of 16.9°F (-8.4°C).

How cold is January in Diagonal?

Diagonal in January has an average high-temperature of 30.6°F (-0.8°C) and an average low-temperature of 16.9°F (-8.4°C).

What is the average humidity in January in Diagonal?

The average relative humidity in January in Diagonal, Iowa, is 80%.

How much does it rain in Diagonal in January?

In Diagonal, in January, it is raining for 4.1 days, with typically 0.75" (19mm) of accumulated precipitation.

When does it snow the most in Diagonal?

The month with the most snowfall in Diagonal, Iowa, is January, when snow falls for 8.4 days and typically aggregates up to 3.54" (90mm) of snow.

How much does it snow in Diagonal in January?

In Diagonal, during January, snow falls for 8.4 days and regularly aggregates up to 3.54" (90mm) of snow.

How many hours of daylight does Diagonal have in January?

The average day length in January in Diagonal, Iowa, is 9h and 38min.

When is the sunrise / sunset in January in Diagonal?

In January, on the first day of the month, sunrise is at 7:41 am and sunset at 5:00 pm. On the last day of the month, in Diagonal, Iowa, sunrise is at 7:28 am and sunset at 5:32 pm CST.

What is the month with the least sunshine in Diagonal?

January has the least sunshine of the year in Diagonal, Iowa, with an average of 4.6h of sunshine.

How many hours of sunshine does Diagonal have in January?

The average sunshine duration in January in Diagonal, Iowa, is 4.6h.

When is the lowest UV index in Diagonal?

With an average maximum UV index of 1, January is the month with the lowest UV index in Diagonal, Iowa.

What is the UV index intensity in January in Diagonal?

The average daily maximum UV index in January is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.
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
Diagonal, IA

Average temperature in January - Diagonal, IA
  • Average high temperature in January: 30.6°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in January: 16.9°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).

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Average pressure in January
Diagonal, IA

Average pressure in January - Diagonal, 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
Diagonal, IA

Average wind speed in January - Diagonal, IA
  • Average wind speed in January: 10.3mph

The windiest months (with the highest average wind speed) are January, February and March (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

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Average humidity in January
Diagonal, IA

Average humidity in January - Diagonal, IA
  • Average humidity in January: 80%

The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in January
Diagonal, IA

Average rainfall in January - Diagonal, IA
  • Average rainfall in January: 0.75"

The wettest month (with the highest rainfall) is June (3.86").
The driest months (with the least rainfall) are February and December (0.71").

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Average rainfall days in January
Diagonal, IA

Average rainfall days in January - Diagonal, IA
  • Average rainfall days in January: 4.1 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (4.1 days).

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Average snowfall in January
Diagonal, IA

Average snowfall in January - Diagonal, IA
  • Average snowfall in January: 3.54"

The month with the highest snowfall is January (3.54").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Diagonal, IA

Average snowfall days in January - Diagonal, IA
  • Average snowfall days in January: 8.4 days

The month with the highest number of snowfall days is January (8.4 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
Diagonal, IA

Average daylight in January / Average sunshine in January - Diagonal, IA
  • 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 4min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in January
Diagonal, IA

Average sunshine days in January - Diagonal, IA
  • Average sunshine days in January: 20 days

The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is May (10.6 days).

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Average UV index in January
Diagonal, IA

Average UV index in January - Diagonal, IA
  • Average UV index in January: 1

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in January
Diagonal, IA

Average cloud cover in January - Diagonal, IA
  • Average cloud cover in January: 50

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in January
Diagonal, IA

Average visibility in January - Diagonal, IA
  • 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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Diagonal, Iowa, USA

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