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
In January, the average high-temperature is practically the same as in December - a still comfortable 66.9°F (19.4°C). In Rowland Heights, in January, the average low-temperature is 50.2°F (10.1°C).Humidity
The average relative humidity in January in Rowland Heights is 50%.Rainfall
In Rowland Heights, California, in January, during 4.8 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, in Rowland Heights, there are 43.8 rainfall days, and 7.01" (178mm) of precipitation is accumulated.Daylight
In Rowland Heights, the average length of the day in January is 10h and 12min.On the first day of January in Rowland Heights, sunrise is at 6:56 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 January, the average sunshine is 6.9h.UV index
January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Rowland Heights. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The daily maximum UV index of 4 in January interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
FAQ
What is the temperature in January in Rowland Heights?
What is the average humidity in January in Rowland Heights?
How much does it rain in Rowland Heights in January?
How many hours of daylight does Rowland Heights have in January?
What time are sunrise and sunset in January in Rowland Heights?
How long on average sun shines in January in Rowland Heights?
When is the lowest UV index in Rowland Heights?
How high is the UV index in January in Rowland Heights?
Average temperature in January
Rowland Heights, CA
- Average high temperature in January: 66.9°F
The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is December (64.9°F).
- Average low temperature in January: 50.2°F
The month with the highest average low temperature is August (66.2°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).
Average pressure in January
Rowland 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
Rowland Heights, 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 (4.6mph).
Average humidity in January
Rowland Heights, CA
- Average humidity in January: 50%
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (46%).
Average rainfall in January
Rowland Heights, CA
- Average rainfall in January: 1.26"
The wettest month (with the highest rainfall) is December (1.61").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in January
Rowland Heights, CA
- Average rainfall days in January: 4.8 days
The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (1.1 days).
Average daylight in January /
Average sunshine in January
Rowland Heights, CA
- Average daylight in January: 10h and 12min
The month with the longest days is June (Average daylight: 14h and 23min).
The month with the shortest days is December (Average daylight: 9h and 56min).
- Average sunshine in January: 6h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 48min).
Average sunshine days in January
Rowland Heights, CA
- Average sunshine days in January: 25.3 days
The month with the most sunshine days is August (28.2 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in January
Rowland 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
Rowland Heights, CA
- Average cloud cover in January: 20
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 5).
Average visibility in January
Rowland 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).
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