Climate and monthly weather forecastSan Luis Obispo, CA
Climate and monthly weather forecast
Weather in January
January in San Luis Obispo, California, is a refreshing winter month, with an average temperature ranging between max 62.4°F (16.9°C) and min 46.9°F (8.3°C). January welcomes an average high-temperature of a comfortable 62.4°F (16.9°C), not much different from the preceding month. Weather in January »Weather in February
The last month of the winter, February, is another refreshing month in San Luis Obispo, California, with an average temperature ranging between max 62.2°F (16.8°C) and min 45.7°F (7.6°C). The shift into February records an average high-temperature of a still refreshing 62.2°F (16.8°C), subtly varied from 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 ranging between max 64°F (17.8°C) and min 46.4°F (8°C). February's transformation into March witnesses an average high-temperature of a still comfortable 64°F (17.8°C), noting a minor change from the preceding month. Weather in March »Weather in April
April, the same as March, is another enjoyable spring month in San Luis Obispo, California, 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). As San Luis Obispo welcomes April, the average high-temperature is noted at a still enjoyable 67.8°F (19.9°C), closely aligning with the preceding month. Weather in April »Weather in May
May, the last month of the spring in San Luis Obispo, is an agreeable month, with an average temperature varying between 51.4°F (10.8°C) and 71.2°F (21.8°C). In May, San Luis Obispo experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 67.8°F (19.9°C) in April to a pleasant 71.2°F (21.8°C). 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 low of 55°F (12.8°C) and an average high of 76.6°F (24.8°C). As May transitions into June, a subtle temperature shift is observed, with average highs adjusting from an agreeable 71.2°F (21.8°C) to a warm 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 temperature in the range of an average low of 58.8°F (14.9°C) and an average high of 80.1°F (26.7°C). The commencement of July introduces an average high-temperature of a still warm 80.1°F (26.7°C), closely mirroring the preceding month. 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 an average temperature varying between 80.2°F (26.8°C) and 59.5°F (15.3°C). With average temperatures fluctuating between a high of 80.2°F (26.8°C) and a low of 59.5°F (15.3°C), August stands out as the warmest month. 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 advent of September presents an average high-temperature of a still moderately hot 79.9°F (26.6°C), maintaining a close correlation with the preceding month. Weather in September »Weather in October
October, like September, in San Luis Obispo, California, is another warm autumn month, 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). San Luis Obispo's weather subtly changes with the onset of October, barely falling from 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 also an enjoyable month, with an average temperature fluctuating between 51.3°F (10.7°C) and 67.1°F (19.5°C). The shift from October to November includes a minor decrease in the average high-temperature, lightly dropping from a moderately hot 74.3°F (23.5°C) to a comfortable 67.1°F (19.5°C). Weather in November »Weather in December
The first month of the winter, December, is still a refreshing month in San Luis Obispo, California, with an average temperature fluctuating between 60.3°F (15.7°C) and 46.2°F (7.9°C). The lowest temperatures are recorded in December, with averages reaching a high of 60.3°F (15.7°C) and a low of 46.2°F (7.9°C). Weather in December »Updated: Jul 30, 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
Throughout the year, there are 57 rainfall days, and 9.57" (243mm) of precipitation is accumulated.
February and December, with an average of 6.5h of sunshine, are months with the least sunshine.
February is the month with the lowest UV index, with an average maximum UV index of 3.
The most humid month is March, with an average relative humidity of 69%.
March is the month with the most rainfall. Rain falls for 10.5 days and accumulates 2.01" (51mm) of precipitation.
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.
The months with the least rainfall are June and August Rain falls for 1.1 days and accumulates 0.04" (1mm) of rain.
The month with the longest days is June, with an average of 14h and 30min of daylight.
June through August, with an average of 12h of sunshine, are months with the most sunshine.
The months with the highest UV index are June and August, with an average maximum UV index of 6.
San Luis Obispo's temperatures tend to reach their peak averages in August, with a high of 80.2°F (26.8°C) and a low of 59.5°F (15.3°C).
The months with the lowest humidity in San Luis Obispo are September and October, with an average relative humidity of 57%.
With average high and low temperatures of 60.3°F (15.7°C) and 46.2°F (7.9°C) respectively, December is San Luis Obispo's coldest month.
With an average of 9h and 48min of daylight, December has the shortest days of the year.
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 6min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 30min
- Average daylight in July:
14h and 18min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 18min - Average daylight in December:
9h and 48min
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 42min - Average sunshine in February:
6h and 30min - Average sunshine in March:
8h and 30min - Average sunshine in April:
10h and 48min - Average sunshine in May:
11h and 24min - 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 18min - Average sunshine in October:
7h and 36min - Average sunshine in November:
7h and 0min - Average sunshine in December:
6h and 30min
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).
