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 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
Greenwich experiences its lowest temperatures in January, with an average peak of 27.9°F (-2.3°C) and a low of 16.3°F (-8.7°C).Humidity
The average relative humidity in January is 82%.Rainfall
In Greenwich, in January, during 4 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Greenwich, during the entire year, the rain falls for 123.3 days and collects up to 18.62" (473mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Greenwich. In January, it is snowing for 8 days. Throughout January, 4.09" (104mm) of snow is accumulated. In Greenwich, during the entire year, snow falls for 37.3 days and aggregates up to 16.57" (421mm) of snow.Daylight
In January, the average length of the day is 9h and 26min.On the first day of January in Greenwich, sunrise is at 7:25 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:04 pm EST.
Sunshine
The average sunshine in January is 4.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The UV index of 1 during January leads to these advisories:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is January?
What is the average humidity in January?
How many days does it rain in January?
How much does it snow in Greenwich in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How long on average sun shines in January?
What is the month with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Greenwich, NY
- Average high temperature in January: 27.9°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in January: 16.3°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure in January
Greenwich, NY
- Average pressure in January: 30.03"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Greenwich, NY
- Average wind speed in January: 7.5mph
The windiest months (with the highest average wind speed) are January and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in January
Greenwich, NY
- Average humidity in January: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (73%).
Average rainfall in January
Greenwich, NY
- Average rainfall in January: 1.14"
The wettest month (with the highest rainfall) is July (2.01").
The driest month (with the least rainfall) is March (1.1").
Average rainfall days in January
Greenwich, NY
- Average rainfall days in January: 4 days
The month with the highest number of rainy days is June (14.1 days).
The month with the least rainy days is January (4 days).
Average snowfall in January
Greenwich, NY
- Average snowfall in January: 4.09"
The month with the highest snowfall is February (5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Greenwich, NY
- Average snowfall days in January: 8 days
The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Greenwich, NY
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January: 4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in January
Greenwich, NY
- Average sunshine days in January: 20.4 days
The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is June (14.3 days).
Average UV index in January
Greenwich, NY
- Average UV index in January: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Greenwich, NY
- Average cloud cover in January: 57
The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in January
Greenwich, NY
- Average visibility in January: 6mi
The months with the highest visibility are January, March, April, May, October, November and December (6mi).
The months with the lowest visibility are February, June, July, August and September (5mi).
Greenwich, New York, USA
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