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 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
January experiences an average high-temperature of a still pleasant 22.7°C (72.9°F), barely different from December's 21.4°C (70.5°F). In January, Portland's temperature tends to fall to an average low of 15.8°C (60.4°F) during the night.Humidity
January and November, with an average relative humidity of 78%, are the least humid months in Portland.Rainfall
In Portland, in January, during 7.9 rainfall days, 28mm (1.1") of precipitation is typically accumulated. In Portland, during the entire year, the rain falls for 154 days and collects up to 536mm (21.1") of precipitation.Daylight
In January, the average length of the day is 14h and 16min.On the first day of January in Portland, sunrise is at 6:09 am and sunset at 8:42 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 8:33 pm NZDT.
Sunshine
With an average of 7.9h of sunshine, January has the most sunshine of the year in Portland.UV index
The months with the highest UV index are January through March, November and December, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: A typical high UV index of 5 in January suggests the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature in Portland?
What is the least humid month in Portland?
What is the average humidity in January in Portland?
How much does it rain in Portland in January?
How many hours of daylight does Portland have in January?
When is the sunrise / sunset in January in Portland?
What month has the most sunshine in Portland?
How many hours of sunshine does Portland have in January?
What are the months with the highest UV index in Portland?
What is the UV index intensity in January in Portland?
Average temperature in January
Portland, New Zealand
- Average high temperature in January: 22.7°C
The warmest month (with the highest average high temperature) is February (22.8°C).
The month with the lowest average high temperature is July (14.3°C).
- Average low temperature in January: 15.8°C
The month with the highest average low temperature is February (16.5°C).
The coldest month (with the lowest average low temperature) is July (9.8°C).
Average pressure in January
Portland, New Zealand
- Average pressure in January: 1015mbar
The months with the highest atmospheric pressure are March and April (1018.1mbar).
The month with the lowest atmospheric pressure is January (1015mbar).
Average wind speed in January
Portland, New Zealand
- Average wind speed in January: 13.5km/h
The windiest month (with the highest average wind speed) is September (16.7km/h).
The calmest month (with the lowest average wind speed) is February (13km/h).
Average humidity in January
Portland, New Zealand
- Average humidity in January: 78%
The month with the highest relative humidity is August (82%).
The months with the lowest relative humidity are January and November (78%).
Average rainfall in January
Portland, New Zealand
- Average rainfall in January: 28mm
The wettest month (with the highest rainfall) is July (69mm).
The driest month (with the least rainfall) is November (26mm).
Average rainfall days in January
Portland, New Zealand
- Average rainfall days in January: 7.9 days
The month with the highest number of rainy days is August (16.8 days).
The month with the least rainy days is January (7.9 days).
Average daylight in January /
Average sunshine in January
Portland, New Zealand
- Average daylight in January: 14h and 2min
The month with the longest days is December (Average daylight: 14h and 30min).
The month with the shortest days is June (Average daylight: 9h and 48min).
- Average sunshine in January: 7h and 5min
The month with the most sunshine is January (Average sunshine: 7h and 54min).
The month with the least sunshine is August (Average sunshine: 6h and 36min).
Average sunshine days in January
Portland, New Zealand
- Average sunshine days in January: 20.6 days
The month with the most sunshine days is January (20.6 days).
The month with the least sunshine days is August (10.5 days).
Average UV index in January
Portland, New Zealand
- Average UV index in January: 5
The months with the highest UV index are January, February, March, November and December (UV index 5).
The month with the lowest UV index is July (UV index 3).
Average cloud cover in January
Portland, New Zealand
- Average cloud cover in January: 35
The month with the most cloud cover is August (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 35).
Average visibility in January
Portland, New Zealand
- Average visibility in January: 9km
The months with the highest visibility are March, April, May and June (10km).
The months with the lowest visibility are January, February, July, August, September, October, November and December (9km).
Portland, New Zealand
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