United StatesAverage weather for Iselin in January
It's cold in January in Iselin with an average temperature of 5°C. Temperatures this month range from a low of -1°C to a high of 12°C. At night, you can expect temperatures between -8°C and 2°C.
Start of January
The month of January starts in Iselin with really cold temps, averaging around 4°C during the day and nights dipping to about -3°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry. Wear a heavy winter coat, sweater, long pants, beanie, and gloves.
Mid January
By mid-January, daytime temps rise to around 7°C, with nights around -1°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of January
By the end of January, the average daytime temperature in Iselin is around 4°C, while nighttime temps are about -3°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days. Wear a heavy winter coat, sweater, long pants, beanie, and gloves.
In January, there is an average of 111 mm of precipitation, spread over 8 days. Of the total precipitation, about 11 cm falls as snow in January. The wind speed is around 4 Bft, mostly coming from the Southwest.
Iselin in January |
New York | ||
|---|---|---|---|
 Average temperature |
5°C | 5°C | |
 Max. temperature |
12°C | 11°C | |
| Min. temperature |
-1°C | -5°C | |
 Total precipitation |
111 mm | 97 mm | |
| Rainy days |
8 days | 12 days | |
 Total snowfall |
11 cm | 16 cm | |
| Snowy days |
4 days | 8 days | |
December
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is January a good time to visit Iselin?
Looking for sun? January isn’t a good month to be in Iselin. There’s too much chance of rain this month.
Temperature records
With 21°C in 2020, Iselin reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was -10°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of -17°C to a highest value of 10°C.
Check out the climate of Iselin for all months and discover the best travel time
Daily Temperature in January in Iselin
This chart shows the average daily high and low temperatures in January for Iselin, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in January in Iselin
The chart below shows the average daily precipitation in January for Iselin, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for January, you can expect about 8 days of precipitation in Iselin.
Daily Snowfall in January in Iselin
This chart shows the average daily snowfall in January in Iselin, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in January.
Daily UV index in January in Iselin
This chart shows the average daily UV index in January in Iselin, 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.
Temperature in January in Iselin over the years
This chart shows the average temperature in January in Iselin, measured in degrees Celsius, over the past few years.
Total precipitation in January in Iselin over the years
This chart shows the average precipitation in January in Iselin, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in January in Iselin per year
This chart shows the average snowfall in January in Iselin, measured in centimeters, over the past few years.
Daily weather in January for Iselin
Click on any day in January to get detailed info about the usual weather on that day in Iselin. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in January in Iselin
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Average weather in Iselin by month
Click on a month below to see detailed weather info for Iselin. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
