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
The month of January sees the lowest average temperatures, reaching 30°F (-1.1°C) at the peak and 16.7°F (-8.5°C) at the low.Humidity
The most humid month in Henderson is January, with an average relative humidity of 81%.Rainfall
January and February are months with the least rain when the rain falls for 3.6 days and typically aggregates up to 0.63" (16mm) of rain.Snowfall
Months with snowfall in Henderson are January through April, October through December. January is the month with the most snowfall in Henderson. Snow falls for 7.9 days and accumulates 2.68" (68mm) of snow.Daylight
The average length of the day in January in Henderson is 9h and 37min.On the first day of January in Henderson, Iowa, sunrise is at 7:46 am and sunset at 5:03 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 5:36 pm CST.
Sunshine
The month with the least sunshine in Henderson is January, with an average of 4.6h of sunshine.UV index
The months with the lowest UV index in Henderson, Iowa, are January, February, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In January, the maximum UV index of 2 suggests this advice:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
What are the coldest months in Henderson?
How cold is January in Henderson?
What is the most humid month in Henderson?
What is the average humidity in January in Henderson?
What is the driest month in Henderson?
How much does it rain in Henderson in January?
When does it snow the most in Henderson?
How many days does it snow in January in Henderson?
What is the average length of the day in January in Henderson?
What time are sunrise and sunset in January in Henderson?
What is the month with the least sunshine in Henderson?
How many hours of sunshine does Henderson have in January?
When is the lowest UV index in Henderson?
How high is the UV index in January in Henderson?
Average temperature in January
Henderson, IA
- Average high temperature in January: 30°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in January: 16.7°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in January
Henderson, IA
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in January
Henderson, IA
- Average wind speed in January: 10mph
The windiest months (with the highest average wind speed) are March and April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in January
Henderson, IA
- Average humidity in January: 81%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (68%).
Average rainfall in January
Henderson, IA
- Average rainfall in January: 0.63"
The wettest month (with the highest rainfall) is June (4.06").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days in January
Henderson, IA
- Average rainfall days in January: 3.6 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in January
Henderson, IA
- Average snowfall in January: 2.68"
The month with the highest snowfall is January (2.68").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Henderson, IA
- Average snowfall days in January: 7.9 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Henderson, 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 18min).
- Average sunshine in January: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in January
Henderson, IA
- Average sunshine days in January: 20.4 days
The month with the most sunshine days is December (23.1 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in January
Henderson, IA
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in January
Henderson, IA
- Average cloud cover in January: 50
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in January
Henderson, 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).
Henderson, Iowa, USA
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