January weather forecastJohnstown, CO

January

Weather in January

January weather in Johnstown, Colorado, is marked by cold temperatures and occasional snowfall. The lowest temperatures of the year, fluctuating from 22.6°F (-5.2°C) to 41.5°F (5.3°C), are characteristic features of the month. Sky often becomes decorated with snowflakes as well, with 2.64" (67mm) of snowfall recorded across the month. Daylight hours are limited, giving a wintry ambiance to the town, while the fresh snow introduces an enticing charm for snow-lovers. Wind speed remains moderate, limiting winter chills while enjoying outdoor activities.

Temperature

Johnstown's weather, upon January's arrival, documents an average high-temperature of a still icy 41.5°F (5.3°C), nearly identical to the prior month. January nights in Johnstown, Colorado, observe an average temperature dip to a freezing cold 22.6°F (-5.2°C).

Humidity

January, February and December, with an average relative humidity of 63%, are the most humid months in Johnstown.

Rainfall

January and December are months with the least rain when the rain falls for 5.3 days and typically aggregates up to 0.39" (10mm) of rain.

Snowfall

January through May, October through December are months with snowfall in Johnstown. In Johnstown, during January, snow falls for 6.8 days and regularly aggregates up to 2.64" (67mm) of snow. Throughout the year, in Johnstown, there are 41 snowfall days, and 25.51" (648mm) of snow is accumulated.

Daylight

In Johnstown, the average length of the day in January is 9h and 41min.
On the first day of the month, sunrise is at 7:22 am and sunset at 4:43 pm. On the last day of January, in Johnstown, sunrise is at 7:09 am and sunset at 5:16 pm MST.

Sunshine

In January, the average sunshine is 7h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 2 in January transforms 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. Around midday, solar radiation is most harmful; hence, exposure should be limited. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.

Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in January, in Johnstown, is 41.5°F (5.3°C), while the low-temperature averages to 22.6°F (-5.2°C).

The months with the highest humidity in Johnstown, Colorado, are January, February and December, with an average relative humidity of 63%.

In Johnstown, the average relative humidity in January is 63%.

January and December are months with the least rain in Johnstown when the rain falls for 5.3 days and typically aggregates up to 0.39" (10mm) of rain.

In January, in Johnstown, Colorado, the rain falls for 5.3 days. Throughout January, 0.39" (10mm) of precipitation is accumulated.

In Johnstown, Colorado, in January, snow falls for 6.8 days, with typically accumulated 2.64" (67mm) of snow.

In January, the average day length in Johnstown is 9h and 41min.

In January, on the first day of the month, sunrise is at 7:22 am and sunset at 4:43 pm. On the last day of the month, in Johnstown, Colorado, sunrise is at 7:09 am and sunset at 5:16 pm MST.

In Johnstown, Colorado, the average sunshine duration in January is 7h.

The months with the lowest UV index in Johnstown are January, February, November and December, with an average maximum UV index of 2.

In January, the average daily maximum UV index in Johnstown, Colorado, is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

39.4°F

41.5°F

42.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.2mph

6.6mph

7mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

22.2

22.4

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Johnstown, CO

Average high temperature in January: 41.5°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is December (39.4°F).

Average low temperature in January: 22.6°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).

Average pressure in January
Johnstown, CO

Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in January
Johnstown, CO

Average wind speed in January: 6mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is December (5.5mph).

Average humidity in January
Johnstown, CO

Average humidity in January: 63%

The months with the highest relative humidity are January, February and December (63%).
The months with the lowest relative humidity are August and September (42%).

Average rainfall in January
Johnstown, CO

Average rainfall in January: 0.39"

The wettest month (with the highest rainfall) is May (2.13").
The driest months (with the least rainfall) are January and December (0.39").

Average rainfall days in January
Johnstown, CO

Average rainfall days in January: 5.3 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is November (3.7 days).

Average snowfall in January
Johnstown, CO

Average snowfall in January: 2.64"

The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in January
Johnstown, CO

Average snowfall days in January: 6.8 days

The month with the highest number of snowfall days is February (9.6 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in January: 9h and 42min

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: 7h and 0min

The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

Average sunshine days in January
Johnstown, CO

Average sunshine days in January: 22.4 days

The month with the most sunshine days is January (22.4 days).
The month with the least sunshine days is July (11.4 days).

Average UV index in January
Johnstown, CO

Average UV index in January: 2

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

Average cloud cover in January
Johnstown, CO

Average cloud cover in January: 23

The month with the most cloud cover is April (Cloud cover 27).
The months with the least cloud cover are June and September (Cloud cover 16).

Average visibility in January
Johnstown, CO

Average visibility in January: 6mi

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