Dayton
Ohio, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Dayton, OH

The Maimi and Mad rivers converge to flow through Dayton city, Ohio, viewed from above
The Maimi and Mad rivers converge to flow through Dayton city, Ohio, viewed from above
January, like December, in Dayton, Ohio, is a wintry winter month, with temperature in the range of an average low of 20.3°F (-6.5°C) and an average high of 34.7°F (1.5°C).

Temperature

The coldest month is January, with an average high-temperature of 34.7°F (1.5°C) and an average low-temperature of 20.3°F (-6.5°C).

Humidity

The average relative humidity in Dayton, Ohio, is 72.7%.

Rainfall

In January, in Dayton, the rain falls for 12.6 days. Throughout January, 2.7" (68.8mm) of precipitation is accumulated. Throughout the year, in Dayton, there are 135.8 rainfall days, and 41" (1042.5mm) 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 6.3 days and accumulates 7.9" (200.7mm) of snow.

Daylight

The average length of the day in Dayton is 9.7h.

Sunshine

The average sunshine in Dayton, Ohio, is 4.3h.

UV index

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
The average daily UV index of 2 transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the coldest month in Dayton?

January is the coldest month in Dayton, with an average high-temperature of 34.7°F (1.5°C) and an average low-temperature of 20.3°F (-6.5°C).

What is the temperature in January in Dayton?

In Dayton, Ohio, in January, the average high-temperature is 34.7°F (1.5°C), and the average low-temperature is 20.3°F (-6.5°C).

What is the average humidity in January in Dayton?

In Dayton, the average relative humidity in January is 72.7%.

How much does it rain in Dayton in January?

In Dayton, during January, the rain falls for 12.6 days and regularly aggregates up to 2.7" (68.8mm) of precipitation.

How much does it snow in Dayton in January?

In Dayton, Ohio, during January, snow falls for 6.3 days and regularly aggregates up to 7.9" (200.7mm) of snow.

When does it snow the most in Dayton?

The month with the most snowfall in Dayton, Ohio, is January when snow falls for 6.3 days and typically aggregates up to 7.9" (200.7mm) of snow.

How many hours of daylight does Dayton have in January?

The average length of the day in January in Dayton is 9.7h.

How many hours of sunshine does Dayton have in January?

The average sunshine in January in Dayton is 4.3h.

What are the months with the lowest UV index in Dayton?

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

How high is the UV index in January in Dayton?

The average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in January - Dayton, OH
  • Average high temperature in January: 34.7°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.7°F).

  • Average low temperature in January: 20.3°F

The month with the highest average low temperature is July (64.5°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).

Average humidity in January - Dayton, OH
  • Average humidity in January: 72.7%

The month with the highest relative humidity is December (75.8%).
The month with the lowest relative humidity is April (64.2%).

Average rainfall in January - Dayton, OH
  • Average rainfall in January: 2.7"

The wettest month (with the highest rainfall) is May (4.7").
The driest month (with the lowest rainfall) is February (2.2").

Average rainfall days in January - Dayton, OH
  • Average rainfall days in January: 12.6 days

The month with the highest number of rainy days is May (13.7 days).
The month with the lowest number of rainy days is August (8.4 days).

Average snowfall in January - Dayton, OH
  • Average snowfall in January: 7.9"

The month with the highest snowfall is January (7.9").
Months with the lowest snowfall are May, June, July, August and September (0").

Average snowfall days in January - Dayton, OH
  • Average snowfall days in January: 6.3 days

The month with the highest number of snowfall days is January (6.3 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average daylight in January / Average sunshine in January - Dayton, OH
  • Average daylight in January: 9.7h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

  • Average sunshine in January: 4.3h

The month with most sunshine is June (Average sunshine: 9.8h).
The month with least sunshine is December (Average sunshine: 3.2h).

Average UV index in January - Dayton, OH
  • Average UV index in January: 2

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).