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
Walnut's January average high-temperature settles at a still comfortable 66°F (18.9°C), showing a near match with the preceding month. During January nights, Walnut witnesses a consistent average temperature of 48.7°F (9.3°C).Humidity
In January, the average relative humidity is 49%.Rainfall
In Walnut, in January, during 4.5 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Walnut, during the entire year, the rain falls for 43.1 days and collects up to 6.89" (175mm) of precipitation.Daylight
In Walnut, the average length of the day in January is 10h and 11min.On the first day of January in Walnut, 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 5:20 pm PST.
Sunshine
The average sunshine in January in Walnut is 7h.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 estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In January, the maximum UV index of 4 transforms into these recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. 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.
Frequently asked questions
What is the usual temperature for Walnut in January?
What is the average humidity in January in Walnut?
How many days does it rain in January in Walnut?
What is the average length of the day in January in Walnut?
When are sunrise and sunset in January in Walnut?
How long on average sun shines in January in Walnut?
When is the lowest UV index in Walnut?
What is the UV index reading in January in Walnut?
Average temperature in January
Walnut, CA
- Average high temperature in January: 66°F
The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in January: 48.7°F
The month with the highest average low temperature is August (66.2°F).
The coldest months (with the lowest average low temperature) are February and December (47.7°F).
Average pressure in January
Walnut, 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 (29.87"Hg).
Average wind speed in January
Walnut, CA
- Average wind speed in January: 5.2mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in January
Walnut, CA
- Average humidity in January: 49%
The months with the highest relative humidity are May and June (56%).
The month with the lowest relative humidity is November (45%).
Average rainfall in January
Walnut, CA
- Average rainfall in January: 1.22"
The wettest month (with the highest rainfall) is December (1.57").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in January
Walnut, CA
- Average rainfall days in January: 4.5 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 days).
Average daylight in January /
Average sunshine in January
Walnut, 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: 7h and 0min
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 48min).
Average sunshine days in January
Walnut, CA
- Average sunshine days in January: 25.8 days
The month with the most sunshine days is June (28.6 days).
The month with the least sunshine days is February (22 days).
Average UV index in January
Walnut, CA
- Average UV index in January: 4
The months with the highest UV index are July and 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
Walnut, CA
- Average cloud cover in January: 20
The months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Walnut, 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).
Walnut, California, USA
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