January weather forecast
Downingtown, PA

Weather in January

January, like December, in Downingtown, Pennsylvania, is another cold winter month, with an average temperature varying between 23.7°F (-4.6°C) and 35.4°F (1.9°C).

Temperature

With an average high-temperature of 35.4°F (1.9°C) and an average low-temperature of 23.7°F (-4.6°C), January is the coldest month.

Humidity

In January, the average relative humidity is 77%.

Rainfall

In January, the rain falls for 6.7 days. Throughout January, 1.77" (45mm) of precipitation is accumulated. In Downingtown, during the entire year, the rain falls for 145.6 days and collects up to 26.81" (681mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In January, in Downingtown, Pennsylvania, it is snowing for 4.6 days. Throughout January, 2.32" (59mm) of snow is accumulated. In Downingtown, Pennsylvania, during the entire year, snow falls for 17.2 days and aggregates up to 10.47" (266mm) of snow.

Daylight

In Downingtown, the average length of the day in January is 9h and 43min.
On the first day of January in Downingtown, sunrise is at 7:24 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:20 pm EST.

Sunshine

In January, the average sunshine is 4.7h.

UV index

The months with the lowest UV index in Downingtown, Pennsylvania, are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. 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 Downingtown?

The coldest month in Downingtown is January, with an average high-temperature of 35.4°F (1.9°C) and an average low-temperature of 23.7°F (-4.6°C).

What is the average humidity in January in Downingtown?

The average relative humidity in January is 77%.

How much does it rain in Downingtown in January?

In Downingtown, in January, during 6.7 rainfall days, 1.77" (45mm) of precipitation is typically accumulated.

How much does it snow in Downingtown in January?

In Downingtown, in January, during 4.6 snowfall days, 2.32" (59mm) of snow is typically accumulated.

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

In Downingtown, the average day length in January is 9h and 43min.

What time are sunrise and sunset in January in Downingtown?

In January, on the first day of the month, sunrise is at 7:24 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:20 pm EST.

How long on average sun shines in January in Downingtown?

In Downingtown, the average sunshine duration in January is 4.7h.

When is the lowest UV index in Downingtown?

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

What is the UV index reading in January in Downingtown?

In January, the average daily maximum UV index in Downingtown is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Downingtown, PA

Average temperature in January - Downingtown, PA
  • Average high temperature in January: 35.4°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (35.4°F).

  • Average low temperature in January: 23.7°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

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Average pressure in January
Downingtown, PA

Average pressure in January - Downingtown, PA
  • Average pressure in January: 30.09"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in January
Downingtown, PA

Average wind speed in January - Downingtown, PA
  • Average wind speed in January: 8.5mph

The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in January
Downingtown, PA

Average humidity in January - Downingtown, PA
  • Average humidity in January: 77%

The months with the highest relative humidity are February, May and October (80%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in January
Downingtown, PA

Average rainfall in January - Downingtown, PA
  • Average rainfall in January: 1.77"

The wettest month (with the highest rainfall) is August (3.31").
The driest month (with the least rainfall) is February (1.61").

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Average rainfall days in January
Downingtown, PA

Average rainfall days in January - Downingtown, PA
  • Average rainfall days in January: 6.7 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (6.7 days).

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Average snowfall in January
Downingtown, PA

Average snowfall in January - Downingtown, PA
  • Average snowfall in January: 2.32"

The month with the highest snowfall is March (3.46").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Downingtown, PA

Average snowfall days in January - Downingtown, PA
  • Average snowfall days in January: 4.6 days

The month with the highest number of snowfall days is February (4.8 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
Downingtown, PA

Average daylight in January / Average sunshine in January - Downingtown, PA
  • Average daylight in January: 9h and 43min

The month with the longest days is June (Average daylight: 14h and 58min).
The month with the shortest days is December (Average daylight: 9h and 23min).

  • Average sunshine in January: 4h and 42min

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

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Average sunshine days in January
Downingtown, PA

Average sunshine days in January - Downingtown, PA
  • Average sunshine days in January: 20.1 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (12.3 days).

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Average UV index in January
Downingtown, PA

Average UV index in January - Downingtown, PA
  • Average UV index in January: 2

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

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Average cloud cover in January
Downingtown, PA

Average cloud cover in January - Downingtown, PA
  • Average cloud cover in January: 47

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in January
Downingtown, PA

Average visibility in January - Downingtown, PA
  • Average visibility in January: 6mi

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

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