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 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
The introduction of January sees an average high-temperature of a still refreshing 66.7°F (19.3°C), hardly deviating from December. During January, Roll's temperature averages to a chilly 49.8°F (9.9°C) at night.Humidity
In Roll, Arizona, the average relative humidity in January is 38%.Rainfall
In January, the rain falls for 2.6 days. Throughout January, 0.28" (7mm) of precipitation is accumulated. Throughout the year, there are 38.1 rainfall days, and 3.9" (99mm) of precipitation is accumulated.Daylight
In January, the average length of the day is 10h and 17min.On the first day of January, sunrise is at 7:38 am and sunset at 5:40 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 6:07 pm MST.
Sunshine
The average sunshine in January in Roll is 7.9h.UV index
The average daily maximum UV index in January is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 5 during January translates into the following guidance:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in January?
What is the average humidity in January?
How much does it rain in Roll in January?
What is the average length of the day in January?
What time are sunrise and sunset in January?
How long on average sun shines in January?
What is the UV index intensity in January?
Average temperature in January
Roll, AZ
- Average high temperature in January: 66.7°F
The warmest month (with the highest average high temperature) is July (103.8°F).
The month with the lowest average high temperature is December (64.9°F).
- Average low temperature in January: 49.8°F
The month with the highest average low temperature is August (85.6°F).
The coldest months (with the lowest average low temperature) are January and December (49.8°F).
Average pressure in January
Roll, AZ
- Average pressure in January: 30.06"Hg
The month with the highest atmospheric pressure is January (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.73"Hg).
Average wind speed in January
Roll, AZ
- Average wind speed in January: 6.1mph
The windiest month (with the highest average wind speed) is July (8.4mph).
The calmest months (with the lowest average wind speed) are November and December (6mph).
Average humidity in January
Roll, AZ
- Average humidity in January: 38%
The month with the highest relative humidity is December (39%).
The month with the lowest relative humidity is June (21%).
Average rainfall in January
Roll, AZ
- Average rainfall in January: 0.28"
The wettest month (with the highest rainfall) is July (0.71").
The driest month (with the least rainfall) is May (0.04").
Average rainfall days in January
Roll, AZ
- Average rainfall days in January: 2.6 days
The month with the highest number of rainy days is July (7.6 days).
The month with the least rainy days is May (0.9 days).
Average daylight in January /
Average sunshine in January
Roll, AZ
- Average daylight in January: 10h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January: 7h and 5min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).
Average sunshine days in January
Roll, AZ
- Average sunshine days in January: 27.8 days
The month with the most sunshine days is May (29.7 days).
The month with the least sunshine days is July (19.8 days).
Average UV index in January
Roll, AZ
- Average UV index in January: 5
The months with the highest UV index are June, July and August (UV index 8).
The months with the lowest UV index are November and December (UV index 4).
Average cloud cover in January
Roll, AZ
- Average cloud cover in January: 15
The month with the most cloud cover is December (Cloud cover 17).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in January
Roll, AZ
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Roll, Arizona, USA
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