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
Transitioning into January, Hacienda Heights experiences an average high-temperature of a still enjoyable 67.5°F (19.7°C), marking a minor shift from the preceding month. Hacienda Heights experiences an average nighttime temperature of 50.5°F (10.3°C) in the month of January.Humidity
In Hacienda Heights, the average relative humidity in January is 50%.Rainfall
In January, the rain falls for 4.7 days. Throughout January, 1.06" (27mm) of precipitation is accumulated. In Hacienda Heights, during the entire year, the rain falls for 40.9 days and collects up to 6.3" (160mm) of precipitation.Daylight
In January, the average length of the day is 10h and 12min.On the first day of January, sunrise is at 6:57 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 5:21 pm PST.
Sunshine
In Hacienda Heights, California, the average sunshine in January is 6.8h.UV index
January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In January, a regular UV index of 4 translates into these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Minimize direct exposure to the Sun during midday when its radiation is at its peak. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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?
What is the average length of the day in January?
What time are sunrise and sunset in January?
How long on average sun shines in January?
What is the month with the lowest UV index?
How high is the UV index in January in Hacienda Heights?
Average temperature in January
Hacienda Heights, CA
- Average high temperature in January: 67.5°F
The warmest month (with the highest average high temperature) is August (87.6°F).
The month with the lowest average high temperature is December (64.9°F).
- Average low temperature in January: 50.5°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (49.3°F).
Average pressure in January
Hacienda Heights, 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
Hacienda Heights, CA
- Average wind speed in January: 5.4mph
The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest months (with the lowest average wind speed) are September and October (4.7mph).
Average humidity in January
Hacienda Heights, CA
- Average humidity in January: 50%
The month with the highest relative humidity is June (60%).
The month with the lowest relative humidity is November (47%).
Average rainfall in January
Hacienda Heights, CA
- Average rainfall in January: 1.06"
The wettest month (with the highest rainfall) is December (1.46").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in January
Hacienda Heights, CA
- Average rainfall days in January: 4.7 days
The month with the highest number of rainy days is March (5.8 days).
The month with the least rainy days is June (1.2 days).
Average daylight in January /
Average sunshine in January
Hacienda Heights, 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 month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days in January
Hacienda Heights, CA
- Average sunshine days in January: 25.8 days
The month with the most sunshine days is August (28.6 days).
The month with the least sunshine days is February (22.6 days).
Average UV index in January
Hacienda Heights, CA
- Average UV index in January: 4
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in January
Hacienda Heights, CA
- Average cloud cover in January: 21
The months with the most cloud cover are February, March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Hacienda Heights, 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).
Hacienda Heights, California, USA
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