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 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 transition from December to January sees an average high-temperature of a still refreshing 64.9°F (18.3°C), indicating a minor variance from the prior month. During January, the temperature is averaged to a low of 48.7°F (9.3°C) at night.Humidity
The average relative humidity in January is 51%.Rainfall
In South Pasadena, in January, during 5.7 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In South Pasadena, during the entire year, the rain falls for 49.2 days and collects up to 8.23" (209mm) of precipitation.Snowfall
In South Pasadena, snow does not fall in January through November.Daylight
The average length of the day in January is 10h and 11min.On the first day of the month, sunrise is at 6:58 am and sunset at 4:53 pm. On the last day of January, sunrise is at 6:50 am and sunset at 5:21 pm PST.
Sunshine
January, February and December, with an average of 6.9h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: A maximum UV index of 4 in January translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
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 much does it rain in January?
When it does not snow?
Does it snow in January?
How many hours of daylight does South Pasadena 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 South Pasadena have in January?
When is the lowest UV index?
How high is the UV index in January in South Pasadena?
Average temperature in January
South Pasadena, CA
- Average high temperature in January: 64.9°F
The warmest month (with the highest average high temperature) is August (86.7°F).
The month with the lowest average high temperature is December (63.1°F).
- Average low temperature in January: 48.7°F
The month with the highest average low temperature is August (65.7°F).
The coldest months (with the lowest average low temperature) are February and December (47.8°F).
Average pressure in January
South Pasadena, CA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in January
South Pasadena, CA
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in January
South Pasadena, CA
- Average humidity in January: 51%
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).
Average rainfall in January
South Pasadena, CA
- Average rainfall in January: 1.5"
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
South Pasadena, CA
- Average rainfall days in January: 5.7 days
The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1 days).
Average snowfall days in January
South Pasadena, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
South 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
South Pasadena, CA
- Average sunshine days in January: 24.4 days
The month with the most sunshine days is August (28.3 days).
The month with the least sunshine days is February (21 days).
Average UV index in January
South 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 months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in January
South 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 4).
Average visibility in January
South 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).
South Pasadena, California, USA
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