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
Dayton records a slight change with January's average high-temperatures adjusting to a still freezing cold 28.6°F (-1.9°C) from December's 27.1°F (-2.7°C). Dayton observes an average nighttime temperature of 16.2°F (-8.8°C) during January.Humidity
The most humid month is January, with an average relative humidity of 93%.Rainfall
In January, the rain falls for 8 days. Throughout January, 1.42" (36mm) of precipitation is accumulated. Throughout the year, there are 129.8 rainfall days, and 16.42" (417mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. In Dayton, in January, during 22.3 snowfall days, 11.14" (283mm) of snow is typically accumulated. In Dayton, during the entire year, snow falls for 117.4 days and aggregates up to 58.62" (1489mm) of snow.Daylight
In January, the average length of the day is 8h and 56min.On the first day of the month, sunrise is at 8:26 am and sunset at 4:54 pm. On the last day of January, sunrise is at 8:05 am and sunset at 5:35 pm MST.
Sunshine
January has the least sunshine of the year, with an average of 3.5h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 1 during January leads to these instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the most humid month?
What is the average humidity in January?
How many days does it rain in January?
How much does it snow in Dayton in January?
What is the average length of the day in January?
When are sunrise and sunset in January in Dayton?
What is the month with the least sunshine?
How many hours of sunshine does Dayton have in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Dayton, MT
- Average high temperature in January: 28.6°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in January: 16.2°F
The month with the highest average low temperature is July (48.4°F).
The coldest months (with the lowest average low temperature) are January and December (16.2°F).
Average pressure in January
Dayton, MT
- Average pressure in January: 30.17"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Dayton, MT
- Average wind speed in January: 3.7mph
The windiest month (with the highest average wind speed) is April (4.7mph).
The calmest months (with the lowest average wind speed) are August and December (3.6mph).
Average humidity in January
Dayton, MT
- Average humidity in January: 93%
The month with the highest relative humidity is January (93%).
The months with the lowest relative humidity are July and August (52%).
Average rainfall in January
Dayton, MT
- Average rainfall in January: 1.42"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days in January
Dayton, MT
- Average rainfall days in January: 8 days
The month with the highest number of rainy days is April (15.9 days).
The month with the least rainy days is December (6.5 days).
Average snowfall in January
Dayton, MT
- Average snowfall in January: 11.14"
The month with the highest snowfall is December (12.36").
The months with the least snowfall are July and August (0").
Average snowfall days in January
Dayton, MT
- Average snowfall days in January: 22.3 days
The month with the highest number of snowfall days is January (22.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in January /
Average sunshine in January
Dayton, MT
- Average daylight in January: 8h and 5min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January: 3h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in January
Dayton, MT
- Average sunshine days in January: 8.9 days
The month with the most sunshine days is July (20.8 days).
The month with the least sunshine days is February (7.1 days).
Average UV index in January
Dayton, MT
- Average UV index in January: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in January
Dayton, MT
- Average cloud cover in January: 64
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in January
Dayton, MT
- Average visibility in January: 3mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
Dayton, Montana, USA
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