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 onset of January brings with it an average high-temperature of a frosty 44.2°F (6.8°C), showing a negligible variation from the month before. During January, the temperature is averaged to a low of 33.3°F (0.7°C) at night.Humidity
In Grand Rapids, the average relative humidity in January is 88%.Rainfall
The month with the most rainfall in Grand Rapids is January, when the rain falls for 19.3 days and typically aggregates up to 5.79" (147mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Grand Rapids, in January, snow falls for 2.1 days, with typically accumulated 3.35" (85mm) of snow. In Grand Rapids, during the entire year, snow falls for 11.8 days and aggregates up to 10.24" (260mm) of snow.Daylight
In January, the average length of the day is 9h and 9min.On the first day of the month, sunrise is at 7:55 am and sunset at 4:39 pm. On the last day of January, sunrise is at 7:37 am and sunset at 5:17 pm PST.
Sunshine
In Grand Rapids, the average sunshine in January is 3.4h.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 exposure to the Sun's UV radiation for ordinary individuals.Note: In January, a regular UV index of 2 translates into these guidelines:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the average humidity in January?
What is the rainiest month?
How much does it rain in January?
How much does it snow in January?
What is the average length of the day in January?
What time are sunrise and sunset in January?
How long on average sun shines in January?
What are the months with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Grand Rapids, OR
- Average high temperature in January: 44.2°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is December (42.1°F).
- Average low temperature in January: 33.3°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in January
Grand Rapids, OR
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.02"Hg).
Average wind speed in January
Grand Rapids, OR
- Average wind speed in January: 4.8mph
The windiest months (with the highest average wind speed) are January, March and November (4.8mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in January
Grand Rapids, OR
- Average humidity in January: 88%
The month with the highest relative humidity is November (89%).
The month with the lowest relative humidity is July (73%).
Average rainfall in January
Grand Rapids, OR
- Average rainfall in January: 5.79"
The wettest month (with the highest rainfall) is January (5.79").
The driest months (with the least rainfall) are July and August (0.51").
Average rainfall days in January
Grand Rapids, OR
- Average rainfall days in January: 19.3 days
The month with the highest number of rainy days is March (21.7 days).
The month with the least rainy days is July (6 days).
Average snowfall in January
Grand Rapids, OR
- Average snowfall in January: 3.35"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Grand Rapids, OR
- Average snowfall days in January: 2.1 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Grand Rapids, 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: 3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in January
Grand Rapids, OR
- Average sunshine days in January: 10.1 days
The month with the most sunshine days is July (22.1 days).
The months with the least sunshine days are February and March (7.6 days).
Average UV index in January
Grand Rapids, OR
- Average UV index in January: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Grand Rapids, OR
- Average cloud cover in January: 65
The months with the most cloud cover are February and March (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in January
Grand Rapids, OR
- Average visibility in January: 4mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
Grand Rapids, Oregon, USA
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