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
Riverdale notes the coldest temperatures in January, with a high average of 28.2°F (-2.1°C) and a low of 15.4°F (-9.2°C).Humidity
January and July, with an average relative humidity of 83%, are the most humid months.Rainfall
In January, the rain falls for 3.2 days. Throughout January, 0.43" (11mm) of precipitation is accumulated. Throughout the year, there are 99.4 rainfall days, and 9.57" (243mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, September through December. The month with the most snowfall in Riverdale is January, when snow falls for 7.2 days and typically aggregates up to 1.26" (32mm) of snow.Daylight
In Riverdale, Iowa, the average length of the day in January is 9h and 35min.On the first day of the month, sunrise is at 7:28 am and sunset at 4:42 pm. On the last day of January, sunrise is at 7:14 am and sunset at 5:15 pm CST.
Sunshine
With an average of 3.9h of sunshine, January has the least sunshine of the year in Riverdale, Iowa.UV index
January is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In January, the maximum UV index of 1 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 mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Riverdale?
How cold is January in Riverdale?
What are the most humid months in Riverdale?
What is the average humidity in January in Riverdale?
How many days does it rain in January in Riverdale?
When does it snow the most in Riverdale?
How many days does it snow in January in Riverdale?
What is the average length of the day in January in Riverdale?
What time are sunrise and sunset in January in Riverdale?
What is the month with the least sunshine in Riverdale?
How many hours of sunshine does Riverdale have in January?
What is the month with the lowest UV index in Riverdale?
What is the UV index reading in January in Riverdale?
Average temperature in January
Riverdale, IA
- Average high temperature in January: 28.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in January: 15.4°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in January
Riverdale, IA
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Riverdale, IA
- Average wind speed in January: 10.3mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in January
Riverdale, IA
- Average humidity in January: 83%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Riverdale, IA
- Average rainfall in January: 0.43"
The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days in January
Riverdale, IA
- Average rainfall days in January: 3.2 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in January
Riverdale, IA
- Average snowfall in January: 1.26"
The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in January
Riverdale, IA
- Average snowfall days in January: 7.2 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Riverdale, IA
- 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 12min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in January
Riverdale, IA
- Average sunshine days in January: 22.2 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (14.4 days).
Average UV index in January
Riverdale, IA
- Average UV index in January: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Riverdale, IA
- Average cloud cover in January: 58
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in January
Riverdale, IA
- 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).
Riverdale, Iowa, USA
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