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
With its high average temperature of 29.7°F (-1.3°C) and a low of 17.4°F (-8.1°C), January is regarded as the coldest month.Humidity
The average relative humidity in January is 81%.Rainfall
In Trenton, Iowa, during January, the rain falls for 5.3 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Trenton, Iowa, during the entire year, the rain falls for 140.1 days and collects up to 29.92" (760mm) of precipitation.Snowfall
Months with snowfall in Trenton are January through April, October through December. The month with the most snowfall in Trenton, Iowa, is January, when snow falls for 9.6 days and typically aggregates up to 4.76" (121mm) of snow.Daylight
In Trenton, the average length of the day in January is 9h and 37min.On the first day of January, sunrise is at 7:31 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 5:21 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 4h of sunshine.UV index
January is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 1 during January morphs into the following directions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
What time of the year is the coldest in Trenton?
How cold is it in Trenton in January?
What is the average humidity in January in Trenton?
How much does it rain in Trenton in January?
When does it snow the most in Trenton?
How many days does it snow in January in Trenton?
How many hours of daylight does Trenton have in January?
When are sunrise and sunset in January in Trenton?
What is the month with the least sunshine in Trenton?
How long on average sun shines in January in Trenton?
When is the lowest UV index in Trenton?
What is the UV index intensity in January in Trenton?
Average temperature in January
Trenton, IA
- Average high temperature in January: 29.7°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in January: 17.4°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in January
Trenton, IA
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in January
Trenton, IA
- Average wind speed in January: 10.7mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity in January
Trenton, IA
- Average humidity in January: 81%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Trenton, IA
- Average rainfall in January: 1.42"
The wettest month (with the highest rainfall) is May (4.29").
The driest months (with the least rainfall) are February and December (1.38").
Average rainfall days in January
Trenton, IA
- Average rainfall days in January: 5.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in January
Trenton, IA
- Average snowfall in January: 4.76"
The month with the highest snowfall is January (4.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Trenton, IA
- Average snowfall days in January: 9.6 days
The month with the highest number of snowfall days is January (9.6 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
Trenton, 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
The month with the most sunshine is July (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 4h).
Average sunshine days in January
Trenton, IA
- Average sunshine days in January: 16.2 days
The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is May (10.6 days).
Average UV index in January
Trenton, IA
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Trenton, IA
- Average cloud cover in January: 56
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July, August and September (Cloud cover 31).
Average visibility in January
Trenton, IA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Trenton, Iowa, USA
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