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
December's transformation into January witnesses an average high-temperature of a still enjoyable 63°F (17.2°C), noting a minor change from the preceding month. During the nights in January, the temperature averages to a frosty 47.5°F (8.6°C).Humidity
In Arroyo Grande, California, the average relative humidity in January is 63%.Rainfall
In January, in Arroyo Grande, the rain falls for 5.5 days. Throughout January, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 47.6 rainfall days, and 6.93" (176mm) of precipitation is accumulated.Daylight
The average length of the day in January in Arroyo Grande is 10h and 7min.On the first day of January in Arroyo Grande, sunrise is at 7:10 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 5:29 pm PST.
Sunshine
The average sunshine in January is 6.8h.UV index
The months with the lowest UV index in Arroyo Grande are January through March, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In January, a daily UV index of 4 turns into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in January in Arroyo Grande?
What is the average humidity in January in Arroyo Grande?
How much does it rain in Arroyo Grande in January?
How many hours of daylight does Arroyo Grande have in January?
When is the sunrise / sunset in January in Arroyo Grande?
How many hours of sunshine does Arroyo Grande have in January?
When is the lowest UV index in Arroyo Grande?
What is the UV index reading in January in Arroyo Grande?
Average temperature in January
Arroyo Grande, CA
- Average high temperature in January: 63°F
The warmest month (with the highest average high temperature) is September (79.5°F).
The month with the lowest average high temperature is December (61.2°F).
- Average low temperature in January: 47.5°F
The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in January
Arroyo Grande, CA
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in January
Arroyo Grande, CA
- Average wind speed in January: 6.2mph
The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in January
Arroyo Grande, CA
- Average humidity in January: 63%
The month with the highest relative humidity is March (68%).
The month with the lowest relative humidity is October (58%).
Average rainfall in January
Arroyo Grande, CA
- Average rainfall in January: 1.22"
The wettest month (with the highest rainfall) is March (1.61").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in January
Arroyo Grande, CA
- Average rainfall days in January: 5.5 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (0.8 days).
Average daylight in January /
Average sunshine in January
Arroyo Grande, CA
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January: 6h and 5min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).
Average sunshine days in January
Arroyo Grande, CA
- Average sunshine days in January: 24.3 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is February (21 days).
Average UV index in January
Arroyo Grande, CA
- Average UV index in January: 4
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in January
Arroyo Grande, CA
- Average cloud cover in January: 23
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in January
Arroyo Grande, 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).
Arroyo Grande, California, USA
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