Normal weather for San Luis Obispo in January
It's pleasantly warm in January in San Luis Obispo with an average temperature of 19°C. Temperatures this month range from a low of 17°C to a high of 21°C. At night, you can expect temperatures between 3°C and 9°C.
In January, there is an average of 152 mm of precipitation, spread over 16 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
San Luis Obispo in January |
London | ||
|---|---|---|---|
 Average Temperature |
19°C | 8°C | |
 High Temp |
21°C | 9°C | |
| Low Temp |
17°C | 6°C | |
 Total Precipitation |
152 mm | 58 mm | |
| Rainy Days |
16 days | 9 days | |
Start of January
The month of January starts in San Luis Obispo with mild temperatures, averaging around 19°C during the day and nights close to 7°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. During the day, a shirt, maybe a light cardigan, and light trousers will do. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
Mid-January
By mid-January, the average daytime temperature rises to around 21°C, with nights close to 9°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
Temperatures vary between day and night, so it’s smart to wear layers. During the day, a shirt, maybe a light cardigan, and light trousers will do. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
End of January
By the end of January, the average daytime temperature in San Luis Obispo will be around 20°C, with nights close to 7°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
As it gets cooler in the evening, it’s best to wear layers. During the day, a shirt, maybe a light cardigan, and light trousers will do. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
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UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is January a good time to visit San Luis Obispo?
After some sun? Then January isn’t the best time to be in San Luis Obispo. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for San Luis Obispo in January
With 32°C, San Luis Obispo hit the highest temperature in the last 10 years in January 2014. The lowest daytime temperature in this month was 11°C in 2023. The extreme night temperatures ranged from a low of -3°C to a high of 16°C.
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Daily Temperature in January in San Luis Obispo
This chart shows the average daily temperatures, both day and night, for each day in January in San Luis Obispo, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in January in San Luis Obispo
The chart below shows the average daily precipitation in January for San Luis Obispo, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for January, you can expect around 16 days of rain in San Luis Obispo.
Daily UV Index in January in San Luis Obispo
This chart shows the average daily UV index in January in San Luis Obispo, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in January in San Luis Obispo Over the Years
This chart shows the average temperature in January in San Luis Obispo, measured in degrees Celsius, over the past years.
Total Precipitation in January in San Luis Obispo Over the Years
This chart shows the average precipitation in January in San Luis Obispo, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in January for San Luis Obispo
Click on a specific day in January for detailed info on the typical weather on that day in San Luis Obispo. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in January in San Luis Obispo
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Average Weather in San Luis Obispo by Month
Click on a month below to see detailed weather info for San Luis Obispo. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of San Luis Obispo for all months at once
