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
During the coldest month, January, temperatures average a high of 39°F (3.9°C) and a low of 24.3°F (-4.3°C).Humidity
The months with the lowest humidity are January, June and July, with an average relative humidity of 74%.Rainfall
January is the month with the least rainfall. Rain falls for 9.9 days and accumulates 1.89" (48mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Grottoes, during January, snow falls for 6 days and regularly aggregates up to 3.66" (93mm) of snow. In Grottoes, during the entire year, snow falls for 21.7 days and aggregates up to 16.69" (424mm) of snow.Daylight
In January, the average length of the day is 9h and 52min.On the first day of January, sunrise is at 7:31 am and sunset at 5:05 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:36 pm EST.
Sunshine
In January, the average sunshine is 5.4h.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 of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
Is January cold?
What are the least humid months?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
How much does it snow in January?
How many hours of daylight does Grottoes have in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Grottoes have in January?
When is the lowest UV index?
What is the UV index intensity in January in Grottoes?
Average temperature in January
Grottoes, VA
- Average high temperature in January: 39°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in January: 24.3°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in January
Grottoes, VA
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in January
Grottoes, VA
- Average wind speed in January: 6.3mph
The windiest months (with the highest average wind speed) are February and April (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in January
Grottoes, VA
- Average humidity in January: 74%
The months with the highest relative humidity are May, September and October (78%).
The months with the lowest relative humidity are January, June and July (74%).
Average rainfall in January
Grottoes, VA
- Average rainfall in January: 1.89"
The wettest month (with the highest rainfall) is May (3.27").
The driest month (with the least rainfall) is January (1.89").
Average rainfall days in January
Grottoes, VA
- Average rainfall days in January: 9.9 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in January
Grottoes, VA
- Average snowfall in January: 3.66"
The month with the highest snowfall is March (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Grottoes, VA
- Average snowfall days in January: 6 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Grottoes, VA
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in January
Grottoes, VA
- Average sunshine days in January: 17.2 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in January
Grottoes, VA
- Average UV index in January: 2
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Grottoes, VA
- Average cloud cover in January: 42
The month with the most cloud cover is March (Cloud cover 46).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in January
Grottoes, VA
- Average visibility in January: 5mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Grottoes, Virginia, USA
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