January weather forecast
Johnstown, PA

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Weather in January

The chilly weather of Johnstown, Pennsylvania makes a strong appearance in January, with frequent snowfall making the landscape a winter wonderland. These conditions lead to lower visibility, demanding caution while driving. The relative humidity increases, paving the way for a typical wintry ambience alongside shorter daylight hours. Noteworthy in this season is the lower limit of the temperature which drops to 18.9°F (-7.3°C). As these conditions persist, the possibility of outdoor activities might be restricted.

Temperature

January is the coldest month, with the temperature often reaching an average high of 30.7°F (-0.7°C) and an average low of 18.9°F (-7.3°C).

Humidity

In Johnstown, the average relative humidity in January is 86%.

Rainfall

In Johnstown, in January, during 6.8 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. Throughout the year, there are 152.7 rainfall days, and 21.1" (536mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Johnstown, in January, during 12 snowfall days, 3.98" (101mm) of snow is typically accumulated. Throughout the year, there are 47.7 snowfall days, and 18.23" (463mm) of snow is accumulated.

Daylight

The average length of the day in January is 9h and 41min.
On the first day of January, sunrise is at 7:38 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:32 pm EST.

Sunshine

With an average of 3h of sunshine, January has the least sunshine of the year.

UV index

In January, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: A typical high UV index of 2 in January suggests the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.

Frequently asked questions

What is the coldest time of year?

January is the coldest month in Johnstown, with an average high-temperature of 30.7°F (-0.7°C) and an average low-temperature of 18.9°F (-7.3°C).

How cold is it in January?

The average high-temperature and low-temperature in Johnstown during January are 30.7°F (-0.7°C) and 18.9°F (-7.3°C) respectively.

What is the average humidity in January?

In Johnstown, the average relative humidity in January is 86%.

How much does it rain in January?

In January, the rain falls for 6.8 days. Throughout January, 1.38" (35mm) of precipitation is accumulated.

How much does it snow in January?

In Johnstown, during January, snow falls for 12 days and regularly aggregates up to 3.98" (101mm) of snow.

How many hours of daylight does Johnstown have in January?

The average day length in January is 9h and 41min.

What time are sunrise and sunset in January?

On the first day of January, sunrise is at 7:38 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:32 pm EST.

What is the month with the least sunshine?

With an average of 3h of sunshine, January has the least sunshine of the year.

How long on average sun shines in January?

In January, the average sunshine duration is 3h.

How high is the UV index in January?

In Johnstown, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
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 January
Johnstown, PA

Average temperature in January - Johnstown, PA
  • Average high temperature in January: 30.7°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.7°F).

  • Average low temperature in January: 18.9°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in January
Johnstown, PA

Average pressure in January - Johnstown, PA
  • Average pressure in January: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in January
Johnstown, PA

Average wind speed in January - Johnstown, PA
  • Average wind speed in January: 10.1mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in January
Johnstown, PA

Average humidity in January - Johnstown, PA
  • Average humidity in January: 86%

The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is July (78%).

Average rainfall in January
Johnstown, PA

Average rainfall in January - Johnstown, PA
  • Average rainfall in January: 1.38"

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is November (1.1").

Average rainfall days in January
Johnstown, PA

Average rainfall days in January - Johnstown, PA
  • Average rainfall days in January: 6.8 days

The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (6.8 days).

Average snowfall in January
Johnstown, PA

Average snowfall in January - Johnstown, PA
  • Average snowfall in January: 3.98"

The month with the highest snowfall is March (4.21").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in January
Johnstown, PA

Average snowfall days in January - Johnstown, PA
  • Average snowfall days in January: 12 days

The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January /
Average sunshine in January
Johnstown, PA

Average daylight in January / Average sunshine in January - Johnstown, PA
  • Average daylight in January: 9h and 4min

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 24min).

  • Average sunshine in January: 3h and 0min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in January
Johnstown, PA

Average sunshine days in January - Johnstown, PA
  • Average sunshine days in January: 14.8 days

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (9 days).

Average UV index in January
Johnstown, PA

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

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in January
Johnstown, PA

Average cloud cover in January - Johnstown, PA
  • Average cloud cover in January: 72

The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 39).

Average visibility in January
Johnstown, PA

Average visibility in January - Johnstown, PA
  • Average visibility in January: 5mi

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

Johnstown, Pennsylvania, USA

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