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
January
Weather in January
Temperature
Temperature records mark January as the coldest month, with highs averaging 14.8°C (58.6°F) and lows at 11.3°C (52.3°F).Humidity
The months with the highest humidity are January, April, July and December, with an average relative humidity of 75%.Rainfall
In January, the rain falls for 9 days. Throughout January, 18mm (0.71") of precipitation is accumulated. In Oeiras, during the entire year, the rain falls for 85.8 days and collects up to 215mm (8.46") of precipitation.Daylight
In January, the average length of the day is 9h and 49min.On the first day of January, sunrise is at 07:55 and sunset at 17:26. On the last day of the month, sunrise is at 07:44 and sunset at 17:57 WET.
Sunshine
January has the least sunshine of the year, with an average of 5.5h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 4 during January translates into the following guidance:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Oeiras?
What are January temperatures in Oeiras?
What is the most humid month in Oeiras?
What is the average humidity in January in Oeiras?
How many days does it rain in January in Oeiras?
How many hours of daylight does Oeiras have in January?
When are sunrise and sunset in January in Oeiras?
What is the month with the least sunshine in Oeiras?
How many hours of sunshine does Oeiras have in January?
What is the month with the lowest UV index in Oeiras?
What is the UV index reading in January in Oeiras?
Average temperature in January
Oeiras, Portugal
- Average high temperature in January: 14.8°C
The warmest month (with the highest average high temperature) is August (24.5°C).
The month with the lowest average high temperature is January (14.8°C).
- Average low temperature in January: 11.3°C
The month with the highest average low temperature is August (18.6°C).
The coldest month (with the lowest average low temperature) is February (10.8°C).
Average pressure in January
Oeiras, Portugal
- Average pressure in January: 1022.5mbar
The months with the highest atmospheric pressure are January and December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in January
Oeiras, Portugal
- Average wind speed in January: 18.9km/h
The windiest month (with the highest average wind speed) is February (19.5km/h).
The calmest month (with the lowest average wind speed) is October (15.6km/h).
Average humidity in January
Oeiras, Portugal
- Average humidity in January: 75%
The months with the highest relative humidity are January, April, July and December (75%).
The months with the lowest relative humidity are May and October (72%).
Average rainfall in January
Oeiras, Portugal
- Average rainfall in January: 18mm
The wettest month (with the highest rainfall) is November (44mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in January
Oeiras, Portugal
- Average rainfall days in January: 9 days
The month with the highest number of rainy days is November (12.4 days).
The month with the least rainy days is August (1.9 days).
Average daylight in January /
Average sunshine in January
Oeiras, Portugal
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 5h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in January
Oeiras, Portugal
- Average sunshine days in January: 20.3 days
The month with the most sunshine days is August (28 days).
The month with the least sunshine days is November (15.6 days).
Average UV index in January
Oeiras, Portugal
- Average UV index in January: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in January
Oeiras, Portugal
- Average cloud cover in January: 40
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in January
Oeiras, Portugal
- Average visibility in January: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
