January weather forecast
Derby, IN

Weather in January

January, the same as December, is a wintry winter month in Derby, Indiana, with average temperature ranging between max 39.7°F (4.3°C) and min 26.6°F (-3°C).

Temperature

The coldest month is January, with an average high-temperature of 39.7°F (4.3°C) and an average low-temperature of 26.6°F (-3°C).

Humidity

The average relative humidity in January is 78%.

Rainfall

In January, in Derby, Indiana, the rain falls for 9 days. Throughout January, 1.18" (30mm) of precipitation is accumulated. Throughout the year, there are 133.4 rainfall days, and 17.99" (457mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. January is the month with the most snowfall in Derby. Snow falls for 5.7 days and accumulates 1.3" (33mm) of snow.

Daylight

In Derby, the average length of the day in January is 9.9h.

Sunshine

Months with the least sunshine are January and February, with an average of 4.3h of sunshine.

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Derby, Indiana. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Derby?

The coldest month in Derby is January, with an average high-temperature of 39.7°F (4.3°C) and an average low-temperature of 26.6°F (-3°C).

What is the average humidity in January in Derby?

In January, the average relative humidity is 78%.

How many days does it rain in January in Derby?

In Derby, during January, the rain falls for 9 days and regularly aggregates up to 1.18" (30mm) of precipitation.

What is the snowiest month in Derby?

January is the month with the most snowfall in Derby, Indiana. Snow falls for 5.7 days and accumulates 1.3" (33mm) of snow.

How much does it snow in Derby in January?

In Derby, during January, snow falls for 5.7 days and regularly aggregates up to 1.3" (33mm) of snow.

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

In January, the average length of the day in Derby, Indiana, is 9.9h.

What is the month with the least sunshine in Derby?

Months with the least sunshine in Derby are January and February, with an average of 4.3h of sunshine.

How long on average sun shines in January in Derby?

In January, the average sunshine in Derby, Indiana, is 4.3h.

When is the lowest UV index in Derby?

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

How high is the UV index in January in Derby?

In January, the average daily maximum UV index in Derby, Indiana, is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to the Sun's UV rays.

Average temperature in January
Derby, IN

Average temperature in January - Derby, IN
  • Average high temperature in January: 39.7°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in January: 26.6°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).

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Average pressure in January
Derby, IN

Average pressure in January - Derby, IN
  • Average pressure in January: 30.16"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.95").

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Average wind speed in January
Derby, IN

Average wind speed in January - Derby, IN
  • Average wind speed in January: 8.1mph

The windiest months (with the highest average wind speed) are January, February and April (8.1mph).
The calmest month (with the lowest average wind speed) is July (5mph).

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Average humidity in January
Derby, IN

Average humidity in January - Derby, IN
  • Average humidity in January: 78%

Months with the highest relative humidity are February and May (80%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in January
Derby, IN

Average rainfall in January - Derby, IN
  • Average rainfall in January: 1.18"

The wettest month (with the highest rainfall) is April (2.13").
The driest month (with the least rainfall) is September (0.75").

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Average rainfall days in January
Derby, IN

Average rainfall days in January - Derby, IN
  • Average rainfall days in January: 9 days

The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is October (8.4 days).

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Average snowfall in January
Derby, IN

Average snowfall in January - Derby, IN
  • Average snowfall in January: 1.3"

The month with the highest snowfall is January (1.3").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Derby, IN

Average snowfall days in January - Derby, IN
  • Average snowfall days in January: 5.7 days

The month with the highest number of snowfall days is February (6.1 days).
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
Derby, IN

Average daylight in January / Average sunshine in January - Derby, IN
  • Average daylight in January: 9.9h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in January: 4.3h

The month with the most sunshine is August (Average sunshine: 10.5h).
Months with the least sunshine are January and February (Average sunshine: 4.3).

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Average sunshine days in January
Derby, IN

Average sunshine days in January - Derby, IN
  • Average sunshine days in January: 17.8 days

The month with the most sunshine days is October (20 days).
The month with the least sunshine days is May (12.5 days).

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Average UV index in January
Derby, IN

Average UV index in January - Derby, IN
  • Average UV index in January: 2

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

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Average cloud cover in January
Derby, IN

Average cloud cover in January - Derby, IN
  • Average cloud cover in January: 55

The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in January
Derby, IN

Average visibility in January - Derby, IN
  • Average visibility in January: 6mi

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

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