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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Beautiful blue water surrounded by scenic mountain ranges at the San Luis Obispo, California
Weather in January
January is a comfortable winter month in San Luis Obispo, California, with an average temperature varying between 62.4°F (16.9°C) and 46.9°F (8.3°C). During January, San Luis Obispo observes a subtle ascent to an enjoyable 62.4°F (16.9°C) from December's 60.3°F (15.7°C) in the average high-temperature. Weather in January »
Weather in February
February, the last month of the winter in San Luis Obispo, is another comfortable month, with temperature in the range of an average high of 62.2°F (16.8°C) and an average low of 45.7°F (7.6°C). The arrival of February brings an average high-temperature of a still refreshing 62.2°F (16.8°C), nearly identical to January's 62.4°F (16.9°C). Weather in February »
Weather in March
March, the first month of the spring in San Luis Obispo, is also an enjoyable month, with an average temperature fluctuating between 64°F (17.8°C) and 46.4°F (8°C). The unfolding of March shows an average high-temperature of a still enjoyable 64°F (17.8°C), indicating a slight variance from February's 62.2°F (16.8°C). Weather in March »
Weather in April
April, like March, in San Luis Obispo, California, is another comfortable spring month, with temperature in the range of an average low of 48.2°F (9°C) and an average high of 67.8°F (19.9°C). San Luis Obispo greets April with an average high-temperature of a still refreshing 67.8°F (19.9°C), marking a slight deviation from the preceding month. Weather in April »
Weather in May
May, the last month of the spring in San Luis Obispo, is a pleasant month, with an average temperature fluctuating between 51.4°F (10.8°C) and 71.2°F (21.8°C). In May, San Luis Obispo experiences a minor shift in meteorological conditions with average high-temperatures marked at an agreeable 71.2°F (21.8°C), closely mirroring the climate in April. Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in San Luis Obispo, California, with temperature in the range of an average high of 76.6°F (24.8°C) and an average low of 55°F (12.8°C). A subtle rise in the average high-temperature is observed during June, adjusting from a pleasant 71.2°F (21.8°C) in May to a moderately hot 76.6°F (24.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in San Luis Obispo, California, with an average temperature varying between 58.8°F (14.9°C) and 80.1°F (26.7°C). July's onset records a minor alteration in the average high-temperature to a still moderately hot 80.1°F (26.7°C) from June's 76.6°F (24.8°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in San Luis Obispo, California, with temperature in the range of an average low of 59.5°F (15.3°C) and an average high of 80.2°F (26.8°C). August proves to be the warmest month, recording an average peak temperature of 80.2°F (26.8°C) and a minimum temperature of 59.5°F (15.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in San Luis Obispo, California, with an average temperature varying between 79.9°F (26.6°C) and 60.3°F (15.7°C). The arrival of September brings an average high-temperature of a still warm 79.9°F (26.6°C), closely following the temperature pattern of August. Weather in September »
Weather in October
October, the same as September, is a moderately hot autumn month in San Luis Obispo, California, with temperature in the range of an average low of 56.5°F (13.6°C) and an average high of 74.3°F (23.5°C). With the arrival of October, San Luis Obispo experiences a modest decline in average high-temperatures, transitioning from a warm 79.9°F (26.6°C) in September to a still moderately hot 74.3°F (23.5°C). Weather in October »
Weather in November
November, the last month of the autumn in San Luis Obispo, is another refreshing month, with an average temperature fluctuating between 67.1°F (19.5°C) and 51.3°F (10.7°C). With the onset of November, the average high-temperature subtly recedes from October's warm 74.3°F (23.5°C) to an enjoyable 67.1°F (19.5°C). Weather in November »
Weather in December
December, the first month of the winter in San Luis Obispo, is also a moderate month, with temperature in the range of an average low of 46.2°F (7.9°C) and an average high of 60.3°F (15.7°C). December is the coldest month of the year, registering average temperatures as high as 60.3°F (15.7°C) and as low as 46.2°F (7.9°C). Weather in December »
Updated: Jul 7, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How many days does it rain?
Throughout the year, there are 57 rainfall days, and 9.57" (243mm) of precipitation is accumulated.
What are the months with the least sunshine?
February and December, with an average of 6.5h of sunshine, are months with the least sunshine.
When is the lowest UV index?
With an average maximum UV index of 3, February is the month with the lowest UV index.
What is the most humid month?
With an average relative humidity of 69%, March is the most humid month.
What is the wettest month?
The month with the most rainfall is March, when the rain falls for 10.5 days and typically aggregates up to 2.01" (51mm) of precipitation.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
What is the driest month?
June and August are months with the least rain when the rain falls for 1.1 days and typically aggregates up to 0.04" (1mm) of rain.
When are the longest days?
June has the longest days of the year in San Luis Obispo, with an average of 14h and 30min of daylight.
What are the months with the most sunshine?
The months with the most sunshine are June through August, with an average of 12h of sunshine.
What is the month with the highest UV index?
June and August, with an average maximum UV index of 6, are months with the highest UV index.
What is the hottest time of year?
The average temperatures reach their apex in August, averaging 80.2°F (26.8°C) at the high end and 59.5°F (15.3°C) at the low end.
What are the least humid months?
September and October, with an average relative humidity of 57%, are the least humid months.
What is the coldest time of year?
San Luis Obispo experiences its lowest temperatures in December, with an average peak of 60.3°F (15.7°C) and a low of 46.2°F (7.9°C).
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 48min of daylight.
Average temperature
San Luis Obispo, CA
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (60.3°F).
The month with the highest average low temperature is September (60.3°F).
The coldest month (with the lowest average low temperature) is February (45.7°F).
Average pressure
San Luis Obispo, CA
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.02"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.91"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.09"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
San Luis Obispo, CA
- Average wind speed in January:
6mph - Average wind speed in February:
6.5mph - Average wind speed in March:
6.5mph - Average wind speed in April:
6.8mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.3mph - Average wind speed in October:
5.8mph - Average wind speed in November:
5.7mph - Average wind speed in December:
6.2mph
The windiest months (with the highest average wind speed) are April and May (6.8mph).
The calmest months (with the lowest average wind speed) are August and September (5.3mph).
Average humidity
San Luis Obispo, CA
The month with the highest relative humidity is March (69%).
The months with the lowest relative humidity are September and October (57%).
Average rainfall
San Luis Obispo, CA
- Average rainfall in January:
1.85" - Average rainfall in February:
1.77" - Average rainfall in March:
2.01" - Average rainfall in April:
0.63" - Average rainfall in May:
0.28" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.04" - Average rainfall in September:
0.12" - Average rainfall in October:
0.47" - Average rainfall in November:
0.79" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is March (2.01").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days
San Luis Obispo, CA
- Average rainfall days in January:
6.9 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
6.8 days - Average rainfall days in May:
3.6 days - Average rainfall days in June:
1.1 days
- Average rainfall days in July:
2.3 days - Average rainfall days in August:
0.6 days - Average rainfall days in September:
1.8 days - Average rainfall days in October:
3.4 days - Average rainfall days in November:
4.5 days - Average rainfall days in December:
7.7 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is August (0.6 days).
Average daylight / Average sunshine
San Luis Obispo, CA
- Average daylight in January:
10h and 1min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 3min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 2min - Average daylight in December:
9h and 5min
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 4min - Average sunshine in February:
6h and 3min - Average sunshine in March:
8h and 3min - Average sunshine in April:
10h and 5min - Average sunshine in May:
11h and 2min - Average sunshine in June:
12h and 0min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
12h and 0min - Average sunshine in September:
11h and 2min - Average sunshine in October:
7h and 4min - Average sunshine in November:
7h and 0min - Average sunshine in December:
6h and 3min
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
San Luis Obispo, CA
- Average sunshine days in January:
22.8 days - Average sunshine days in February:
19.1 days - Average sunshine days in March:
19.7 days - Average sunshine days in April:
22.3 days - Average sunshine days in May:
26.1 days - Average sunshine days in June:
28.3 days
- Average sunshine days in July:
27.4 days - Average sunshine days in August:
29.2 days - Average sunshine days in September:
27.9 days - Average sunshine days in October:
26.7 days - Average sunshine days in November:
24.5 days - Average sunshine days in December:
22.2 days
The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is February (19.1 days).
Average UV index
San Luis Obispo, CA
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is February (UV index 3).
Average cloud cover
San Luis Obispo, CA
The month with the most cloud cover is March (Cloud cover 28).
The months with the least cloud cover are August and September (Cloud cover 6).
Average visibility
San Luis Obispo, CA
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).
San Luis Obispo, California, USA
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