January Weather forecast - Winter forecast

Weather in January
Frequently asked questions
Average temperature in January
Average pressure in January
Average wind speed in January
Average humidity in January
Average rainfall in January
Average rainfall days in January
Average snowfall in January
Average snowfall days in January
Average daylight in January
Average sunshine in January
Average sunshine days in January
Average UV index in January
Average cloud cover in January
Average visibility in January

The Maimi and Mad rivers converge to flow through Dayton city, Ohio

Weather in January

January, the same as December, is a wintry winter month in Dayton, Ohio, with temperature in the range of an average high of 33.6°F (0.9°C) and an average low of 21.7°F (-5.7°C).

Temperature

The coldest month is January, with an average high-temperature of 33.6°F (0.9°C) and an average low-temperature of 21.7°F (-5.7°C).

Humidity

January, February and December, with an average relative humidity of 82%, are the most humid months.

Rainfall

In Dayton, during 7.7 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 149.5 rainfall days, and 23.9" (607mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. January is the month with the most snowfall. Snow falls for 8.2 days and accumulates 2.05" (52mm) of snow.

Daylight

In Dayton, the average length of the day in January is 9h and 44min.
On the first day of the month, sunrise is at 7:57 am and sunset at 5:22 pm. On the last day of January, in Dayton, sunrise is at 7:45 am and sunset at 5:54 pm EST.

Sunshine

With an average of 3.7h of sunshine, January has the least sunshine of the year.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 2 in January transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

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FAQ

What is the coldest month in Dayton?

January is the coldest month in Dayton, Ohio, with an average high-temperature of 33.6°F (0.9°C) and an average low-temperature of 21.7°F (-5.7°C).

What is the temperature in January in Dayton?

In Dayton, Ohio, in January, the average high-temperature is 33.6°F (0.9°C), and the average low-temperature is 21.7°F (-5.7°C).

What are the most humid months in Dayton?

The months with the highest humidity in Dayton, Ohio, are January, February and December, with an average relative humidity of 82%.

What is the average humidity in January in Dayton?

In January, the average relative humidity is 82%.

How much does it rain in Dayton in January?

In January, in Dayton, Ohio, the rain falls for 7.7 days. Throughout January, 1.57" (40mm) of precipitation is accumulated.

What is the snowiest month in Dayton?

January is the month with the most snowfall in Dayton, Ohio. Snow falls for 8.2 days and accumulates 2.05" (52mm) of snow.

How many days does it snow in January in Dayton?

In Dayton, in January, snow falls for 8.2 days, with typically accumulated 2.05" (52mm) of snow.

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

The average day length in January in Dayton, Ohio, is 9h and 44min.

What time are sunrise and sunset in January in Dayton?

In January, on the first day of the month, sunrise is at 7:57 am and sunset at 5:22 pm. On the last day of the month, in Dayton, sunrise is at 7:45 am and sunset at 5:54 pm EST.

What is the month with the least sunshine in Dayton?

The month with the least sunshine in Dayton is January, with an average of 3.7h of sunshine.

How many hours of sunshine does Dayton have in January?

The average sunshine duration in January in Dayton, Ohio, is 3.7h.

When is the lowest UV index in Dayton?

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

How high is the UV index in January in Dayton?

The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

39.2°F 4°C

33.6°F 0.9°C

37.9°F 3.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.8mph 15.8km/h

10.6mph 17.1km/h

10.5mph 16.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

16.7

16.3

14.9

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Dayton, OH

Average high temperature in January: 33.6°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 (33.6°F).

Average low temperature in January: 21.7°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

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Average pressure in January
Dayton, OH

Average pressure in January: 30.13"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in January
Dayton, OH

Average wind speed in January: 10mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in January
Dayton, OH

Average humidity in January: 82%

The months with the highest relative humidity are January, February and December (82%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in January
Dayton, OH

Average rainfall in January: 1.57"

The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are September and November (1.5").

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Average rainfall days in January
Dayton, OH

Average rainfall days in January: 7.7 days

The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (7.5 days).

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Average snowfall in January
Dayton, OH

Average snowfall in January: 2.05"

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Dayton, OH

Average snowfall days in January: 8.2 days

The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Dayton, OH

Average daylight in January: 9h and 44min

The month with the longest days is June (Average daylight: 14h and 56min).
The month with the shortest days is December (Average daylight: 9h and 25min).

Average sunshine in January: 3h and 42min

The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in January
Dayton, OH

Average sunshine days in January: 16.3 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (9.8 days).

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Average UV index in January
Dayton, OH

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
Dayton, OH

Average cloud cover in January: 61

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in January
Dayton, OH

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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January weather forecast
Dayton, OH

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