Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January stands out as Rockaway's coldest month, with temperatures ranging between an average high of 34.3°F (1.3°C) and a low of 20.8°F (-6.2°C).Humidity
In January, the average relative humidity in Rockaway is 78%.Rainfall
In January, in Rockaway, the rain falls for 4.2 days. Throughout January, 0.43" (11mm) of precipitation is accumulated. Throughout the year, there are 81.9 rainfall days, and 6.69" (170mm) of precipitation is accumulated.Snowfall
Months with snowfall in Rockaway are January through May, October through December. In Rockaway, in January, snow falls for 4.5 days, with typically accumulated 0.51" (13mm) of snow. Throughout the year, there are 18.1 snowfall days, and 2.68" (68mm) of snow is accumulated.Ocean temperature
In January, the average ocean temperature in Rockaway, New Jersey, is 41.4°F (5.2°C).Note: Entering waters of 41.4°F (5.2°C) is life-endangering. A mere moment in 55.4°F (13°C) waters feels piercing cold, and below 50°F (10°C) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.
Daylight
In January, the average length of the day is 9h and 38min.On the first day of the month, sunrise is at 7:22 am and sunset at 4:40 pm. On the last day of January, in Rockaway, New Jersey, sunrise is at 7:09 am and sunset at 5:13 pm EST.
Sunshine
The average sunshine in January is 4.8h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 2 during January translates into these guidelines:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Rockaway?
How cold is it in Rockaway in January?
What is the average humidity in January in Rockaway?
How many days does it rain in January in Rockaway?
How much does it snow in Rockaway in January?
What is the ocean temperature in January in Rockaway?
What is the average length of the day in January in Rockaway?
When is the sunrise / sunset in January in Rockaway?
How long on average sun shines in January in Rockaway?
What are the months with the lowest UV index in Rockaway?
What is the UV index reading in January in Rockaway?
Average temperature in January
Rockaway, NJ
- Average high temperature in January: 34.3°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in January: 20.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in January
Rockaway, NJ
- Average pressure in January: 30.07"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Rockaway, NJ
- Average wind speed in January: 8.1mph
The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in January
Rockaway, NJ
- Average humidity in January: 78%
The months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (75%).
Average rainfall in January
Rockaway, NJ
- Average rainfall in January: 0.43"
The wettest month (with the highest rainfall) is July (0.79").
The driest month (with the least rainfall) is September (0.16").
Average rainfall days in January
Rockaway, NJ
- Average rainfall days in January: 4.2 days
The month with the highest number of rainy days is July (9.5 days).
The month with the least rainy days is February (4 days).
Average snowfall in January
Rockaway, NJ
- Average snowfall in January: 0.51"
The month with the highest snowfall is March (0.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Rockaway, NJ
- Average snowfall days in January: 4.5 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in January
Rockaway, NJ
- Average sea temperature in January: 41.3°F
The best month for swimming (with the highest average sea temperature) is August (74.4°F).
The coldest month (with the lowest average sea temperature) is February (39.3°F).
Average daylight in January /
Average sunshine in January
Rockaway, NJ
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in January
Rockaway, NJ
- Average sunshine days in January: 24.3 days
The month with the most sunshine days is November (24.5 days).
The month with the least sunshine days is July (18.3 days).
Average UV index in January
Rockaway, NJ
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Rockaway, NJ
- Average cloud cover in January: 48
The months with the most cloud cover are February and March (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in January
Rockaway, NJ
- Average visibility in January: 6mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
Rockaway, New Jersey, USA
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