Weathermondo.com
United StatesThe weather in January in Hackettstown
It's cold in January in Hackettstown with an average temperature of 3°C. Temperatures this month range from a low of 0°C to a high of 9°C. At night, you can expect temperatures between -10°C and -2°C.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in January for Hackettstown, New Jersey. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 19°C in 2020, Hackettstown reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was -12°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of -22°C to a highest value of 10°C.
Precipitation and snowfall
In January, there is an average of 97 mm of precipitation, spread over 13 days. Of the total precipitation, about 24 cm falls as snow in January. The wind speed is around 3 Bft, mostly coming from the Southwest.
Daily weather in January for Hackettstown
Click on any day in January to get detailed info about the usual weather on that day in Hackettstown. Check out the historical temperatures and precipitation over the past 10 years on this day.
January weather comparison
| Hackettstown | New York | |
|---|---|---|
| Average temperature | 3°C | 5°C |
| Max. temperature | 9°C | 11°C |
| Min. temperature | -10°C | -5°C |
| Total precipitation | 97 mm | 97 mm |
| Rainy days | 13 days | 12 days |
| Total snowfall | 24 cm | 16 cm |
| Snowy days | 11 days | 8 days |
Start of January
The month of January starts in Hackettstown with really cold temps, averaging around 4°C during the day and nights dipping to about -5°C.
Mid January
By mid-January, daytime temps rise to around 5°C, with nights around -4°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of January
By the end of January, the average daytime temperature in Hackettstown is around 3°C, while nighttime temps are about -6°C. A shower might pop up, but overall, the weather will be dry and sunny.
Find affordable trips to Hackettstown
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Check out the climate of Hackettstown for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in January in Hackettstown, New Jersey. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in January in Hackettstown
Temperature in January in Hackettstown over the years
Precipitation charts
These charts show the average amount of precipitation in January in Hackettstown, New Jersey. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in January in Hackettstown
Total precipitation in January in Hackettstown over the years
Daily Snowfall in January in Hackettstown
Snowfall in January in Hackettstown per year
Daily UV index in January in Hackettstown
This chart shows the average daily UV index in January in Hackettstown, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in January in Hackettstown
Have you been to Hackettstown in January?
Share your weather experience in January in Hackettstown.
Average weather in Hackettstown by month
Click on a month below to see detailed weather info for Hackettstown. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.