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
Hermiston experiences a transition to a still icy 39.9°F (4.4°C) in average high-temperatures with the arrival of January, not greatly differing from December's 38.8°F (3.8°C). An average low-temperature of 29.7°F (-1.3°C) marks the nights throughout January.Humidity
With an average relative humidity of 79%, January is the most humid month.Rainfall
In Hermiston, in January, during 11.1 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 109.3 rainfall days, and 8.11" (206mm) of precipitation is accumulated.Snowfall
January through March, September, November and December are months with snowfall. In Hermiston, in January, during 2.5 snowfall days, 1.06" (27mm) of snow is typically accumulated. Throughout the year, there are 12 snowfall days, and 6.06" (154mm) of snow is accumulated.Daylight
In Hermiston, the average length of the day in January is 9h and 9min.On the first day of the month, sunrise is at 7:38 am and sunset at 4:22 pm. On the last day of January, sunrise is at 7:20 am and sunset at 5:00 pm PST.
Sunshine
January and December, with an average of 5.5h of sunshine, are months with the least sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In January, the maximum UV index of 2 transforms into these recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in 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 January?
How many hours of daylight does Hermiston have in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Hermiston have in January?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Hermiston, OR
- Average high temperature in January: 39.9°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is December (38.8°F).
- Average low temperature in January: 29.7°F
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in January
Hermiston, OR
- Average pressure in January: 30.19"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in January
Hermiston, OR
- Average wind speed in January: 6.3mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest month (with the lowest average wind speed) is December (6.1mph).
Average humidity in January
Hermiston, OR
- Average humidity in January: 79%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in January
Hermiston, OR
- Average rainfall in January: 0.98"
The wettest months (with the highest rainfall) are March and December (1.06").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in January
Hermiston, OR
- Average rainfall days in January: 11.1 days
The month with the highest number of rainy days is March (14.5 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in January
Hermiston, OR
- Average snowfall in January: 1.06"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in January
Hermiston, OR
- Average snowfall days in January: 2.5 days
The month with the highest number of snowfall days is December (3.7 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in January /
Average sunshine in January
Hermiston, OR
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 5h and 3min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in January
Hermiston, OR
- Average sunshine days in January: 16.3 days
The month with the most sunshine days is July (25.5 days).
The month with the least sunshine days is February (13.3 days).
Average UV index in January
Hermiston, OR
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Hermiston, OR
- Average cloud cover in January: 43
The months with the most cloud cover are January and December (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in January
Hermiston, OR
- 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).
Hermiston, Oregon, USA
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