January weather forecastNorwalk, CA
January
Weather in January
January in Norwalk, California, experiences somewhat mild temperatures, with the start of the year providing cooler air and moderate humidity. The weather contrasts slightly from the upcoming months by having average high temperatures of 66.4°F (19.1°C), establishing it as the coldest month of the year. The month also experiences moderate rainfall, with overcast days being not uncommon, though residents will also often enjoy clear skies. Daylight hours are shorter, making the days seem fleeting but equally memorable. Sunny days are enjoyed by locals and visitors alike, ushering in the new year with pleasant weather.Temperature
Norwalk notes an average high-temperature of a still comfortable 66.4°F (19.1°C) in January, displaying minor variation from December. Throughout January, Norwalk anticipates an average low-temperature of 52°F (11.1°C).Humidity
In January, the average relative humidity is 54%.Rainfall
In Norwalk, in January, it is raining for 4.7 days, with typically 1.22" (31mm) of accumulated precipitation. In Norwalk, during the entire year, the rain falls for 49.5 days and collects up to 7.05" (179mm) of precipitation.Daylight
In Norwalk, the average length of the day in January is 10h and 12min.On the first day of the month, sunrise is at 6:57 am and sunset at 4:54 pm. On the last day of January, sunrise is at 6:49 am and sunset at 5:21 pm PST.
Sunshine
In January, the average sunshine is 6.8h.UV index
The average daily maximum UV index in January is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In January, a regular UV index of 5 translates into these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Norwalk, CA
- Average high temperature in January: 66.4°F
The warmest month (with the highest average high temperature) is August (83.1°F).
The month with the lowest average high temperature is December (64.6°F).
- Average low temperature in January: 52°F
The month with the highest average low temperature is August (65.7°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).
Average pressure in January
Norwalk, CA
- 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 June and September (29.89"Hg).
Average wind speed in January
Norwalk, CA
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is October (4.7mph).
Average humidity in January
Norwalk, CA
- Average humidity in January: 54%
The month with the highest relative humidity is June (66%).
The month with the lowest relative humidity is November (51%).
Average rainfall in January
Norwalk, CA
- Average rainfall in January: 1.22"
The wettest month (with the highest rainfall) is December (1.46").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Norwalk, CA
- Average rainfall days in January: 4.7 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.2 days).
Average daylight in January /
Average sunshine in January
Norwalk, CA
- Average daylight in January: 10h and 12min
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 48min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in January
Norwalk, CA
- Average sunshine days in January: 25.6 days
The months with the most sunshine days are January and August (25.6 days).
The month with the least sunshine days is February (21.1 days).
Average UV index in January
Norwalk, CA
- Average UV index in January: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are February, November and December (UV index 4).
Average cloud cover in January
Norwalk, CA
- Average cloud cover in January: 21
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in January
Norwalk, 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).
