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
The beginning of January records an average high-temperature of a still enjoyable 63.9°F (17.7°C), almost echoing the conditions of the previous month. Throughout January, an average low-temperature of 47.3°F (8.5°C) is expected.Humidity
The average relative humidity in January in Pasadena is 51%.Rainfall
In January, the rain falls for 5.7 days. Throughout January, 1.57" (40mm) of precipitation is accumulated. Throughout the year, there are 50.1 rainfall days, and 8.5" (216mm) of precipitation is accumulated.Daylight
The average length of the day in January is 10h and 11min.On the first day of January, sunrise is at 6:58 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 5:21 pm PST.
Sunshine
The months with the least sunshine in Pasadena are January, February and December, with an average of 6.9h of sunshine.UV index
In January, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In January, the UV index of 4 transforms into the following advice:
Undertake protective steps - Preventing sun damage is advised. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in January?
What is the average humidity in January?
How many days does it rain in January?
How many hours of daylight does Pasadena have in January?
When are sunrise and sunset in January?
What are the months with the least sunshine?
How many hours of sunshine does Pasadena have in January?
How high is the UV index in January?
Average temperature in January
Pasadena, CA
- Average high temperature in January: 63.9°F
The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is December (61.7°F).
- Average low temperature in January: 47.3°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (46.6°F).
Average pressure in January
Pasadena, CA
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in January
Pasadena, CA
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in January
Pasadena, CA
- Average humidity in January: 51%
The month with the highest relative humidity is June (58%).
The month with the lowest relative humidity is November (47%).
Average rainfall in January
Pasadena, CA
- Average rainfall in January: 1.57"
The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Pasadena, CA
- Average rainfall days in January: 5.7 days
The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (1.1 days).
Average daylight in January /
Average sunshine in January
Pasadena, CA
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January: 6h and 5min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days in January
Pasadena, CA
- Average sunshine days in January: 24.7 days
The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is February (21.5 days).
Average UV index in January
Pasadena, CA
- Average UV index in January: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in January
Pasadena, CA
- Average cloud cover in January: 20
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Pasadena, CA
- 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).
Pasadena, California, USA
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