December weather forecast
Hereford, PA

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Weather in December

December, the first month of the winter in Hereford, is also an icy month, with an average temperature ranging between max 40.3°F (4.6°C) and min 28.9°F (-1.7°C).

Temperature

Hereford in December experiences a subtle temperature decline, with average high-temperatures reducing from a cool 50°F (10°C) in November to a wintry 40.3°F (4.6°C). During December nights, Hereford records an average temperature of 28.9°F (-1.7°C).

Humidity

The average relative humidity in December is 80%.

Rainfall

In Hereford, during December, the rain falls for 10.8 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, there are 156.9 rainfall days, and 33.15" (842mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Hereford. In Hereford, during December, snow falls for 5.2 days and regularly aggregates up to 2.87" (73mm) of snow. In Hereford, during the entire year, snow falls for 31.2 days and aggregates up to 18.98" (482mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:06 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:45 pm EST.

Sunshine

In Hereford, the average sunshine in December is 4.6h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. 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. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.

Frequently asked questions

How cold is December?

The average high-temperature, in December, in Hereford, is 40.3°F (4.6°C), while the average low-temperature is 28.9°F (-1.7°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 86°F (30°C).

What is the average humidity in December?

In Hereford, the average relative humidity in December is 80%.

How much does it rain in December?

In Hereford, in December, during 10.8 rainfall days, 3.03" (77mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Hereford, in December, during 5.2 snowfall days, 2.87" (73mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 20min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:06 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:45 pm EST.

How many hours of sunshine does Hereford have in December?

In Hereford, the average sunshine duration in December is 4.6h.

What are the months with the lowest UV index?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health 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 December
Hereford, PA

Average temperature in December - Hereford, PA
  • Average high temperature in December: 40.3°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (34.5°F).

  • Average low temperature in December: 28.9°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

Average pressure in December
Hereford, PA

Average pressure in December - Hereford, PA
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Hereford, PA

Average wind speed in December - Hereford, PA
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

Average humidity in December
Hereford, PA

Average humidity in December - Hereford, PA
  • Average humidity in December: 80%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (75%).

Average rainfall in December
Hereford, PA

Average rainfall in December - Hereford, PA
  • Average rainfall in December: 3.03"

The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is September (1.97").

Average rainfall days in December
Hereford, PA

Average rainfall days in December - Hereford, PA
  • Average rainfall days in December: 10.8 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.1 days).

Average snowfall in December
Hereford, PA

Average snowfall in December - Hereford, PA
  • Average snowfall in December: 2.87"

The month with the highest snowfall is March (5.16").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Hereford, PA

Average snowfall days in December - Hereford, PA
  • Average snowfall days in December: 5.2 days

The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Hereford, PA

Average daylight in December / Average sunshine in December - Hereford, PA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 4min

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

Average sunshine days in December
Hereford, PA

Average sunshine days in December - Hereford, PA
  • Average sunshine days in December: 15.8 days

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (11.3 days).

Average UV index in December
Hereford, PA

Average UV index in December - Hereford, PA
  • Average UV index in December: 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, March, November and December (UV index 2).

Average cloud cover in December
Hereford, PA

Average cloud cover in December - Hereford, PA
  • Average cloud cover in December: 51

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in December
Hereford, PA

Average visibility in December - Hereford, PA
  • Average visibility in December: 5mi

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

Hereford, Pennsylvania, USA

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