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, Oregon, marks the onset of January with an average high-temperature of a still frosty 46°F (7.8°C), a subtle shift from December's 44.1°F (6.7°C). An average nighttime temperature of 35.1°F (1.7°C) is noted in Dayton, Oregon, during the month of January.Humidity
In January, the average relative humidity is 86%.Rainfall
In Dayton, during January, the rain falls for 18.2 days and regularly aggregates up to 4.41" (112mm) of precipitation. In Dayton, during the entire year, the rain falls for 172.2 days and collects up to 28.9" (734mm) of precipitation.Snowfall
Months with snowfall in Dayton are January through March, November and December. In Dayton, in January, during 1 snowfall days, 0.35" (9mm) of snow is typically accumulated. Throughout the year, there are 5.3 snowfall days, and 3.19" (81mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 13min.On the first day of the month, sunrise is at 7:51 am and sunset at 4:40 pm. On the last day of January, sunrise is at 7:33 am and sunset at 5:17 pm PST.
Sunshine
In Dayton, the average sunshine in January is 4h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In January, a regular UV index of 2 translates into these guidelines:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Frequently asked questions
What are January temperatures in Dayton?
What is the average humidity in January in Dayton?
How many days does it rain in January in Dayton?
How much does it snow in Dayton in January?
How many hours of daylight does Dayton have in January?
When are sunrise and sunset in January in Dayton?
How long on average sun shines in January in Dayton?
When is the lowest UV index in Dayton?
How high is the UV index in January in Dayton?
Average temperature in January
Dayton, OR
- Average high temperature in January: 46°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (44.1°F).
- Average low temperature in January: 35.1°F
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in January
Dayton, OR
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in January
Dayton, OR
- Average wind speed in January: 5.1mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in January
Dayton, OR
- Average humidity in January: 86%
The months with the highest relative humidity are February and December (87%).
The month with the lowest relative humidity is August (67%).
Average rainfall in January
Dayton, OR
- Average rainfall in January: 4.41"
The wettest month (with the highest rainfall) is December (4.49").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days in January
Dayton, OR
- Average rainfall days in January: 18.2 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.6 days).
Average snowfall in January
Dayton, OR
- Average snowfall in January: 0.35"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Dayton, OR
- Average snowfall days in January: 1 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Dayton, OR
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in January
Dayton, OR
- Average sunshine days in January: 10.6 days
The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in January
Dayton, OR
- Average UV index in January: 2
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 2).
Average cloud cover in January
Dayton, OR
- Average cloud cover in January: 60
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in January
Dayton, OR
- Average visibility in January: 4mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February and December (4mi).
Dayton, Oregon, USA
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