Annual mean 15°C · wettest around December · prevailing wind W
Warmest
24.3 °C
Coldest
14.7 °C
Wettest
14%
Windiest
5.6 m/s
Prevailing
W
4.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in San Luis Obispo over the whole year is 15°C. August is the hottest month, with highs of about 23°C; February is the coldest, with lows of about 7°C. San Luis Obispo has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 15% in December, the wettest. Winds in San Luis Obispo are highest in May, averaging 3.7 m/s (13 km/h), and lightest in November, at 2.4 m/s (9 km/h). The prevailing wind is from the W. The clearest skies in San Luis Obispo come in November, when the sky is typically 24% covered; March is the cloudiest month, at 43%.
Month by month San Luis Obispo climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
15°C
8°C
12°C
15%
37%
2.7 m/s
32
1
85
February
16°C
7°C
13°C
14%
32%
3.0 m/s
36
2
81
March
16°C
8°C
13°C
15%
43%
3.2 m/s
36
2
83
April
18°C
10°C
15°C
8%
36%
3.6 m/s
50
6
81
May
19°C
11°C
16°C
6%
42%
3.7 m/s
55
10
79
June
22°C
13°C
19°C
4%
35%
3.5 m/s
65
19
69
July
23°C
14°C
22°C
2%
36%
3.1 m/s
69
26
62
August
23°C
14°C
22°C
3%
35%
2.9 m/s
71
30
57
September
23°C
14°C
22°C
4%
33%
2.7 m/s
73
29
59
October
22°C
12°C
21°C
6%
26%
2.6 m/s
78
21
69
November
19°C
9°C
16°C
9%
24%
2.4 m/s
65
6
85
December
16°C
8°C
13°C
15%
33%
2.4 m/s
36
0
86
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short San Luis Obispo weather by season
Year round, San Luis Obispo has days of about 15°C at their warmest in January, its coolest month, and 23°C in August, its warmest; the coolest hours of the day run from 7°C to 14°C through the year, and the average temperature over the year is 15°C around the clock. Rain is most likely around December and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
San Luis Obispo weather in winterDecember to February
High 15°CLow 8°CRain 15%
Winter in San Luis Obispo has typical daily highs of about 15°C and lows of about 8°C, with a 15% chance of rain on a given day.
San Luis Obispo weather in springMarch to May
High 18°CLow 10°CRain 10%
Spring in San Luis Obispo has typical daily highs of about 18°C and lows of about 10°C, with a 10% chance of rain on a given day.
San Luis Obispo weather in summerJune to August
High 22°CLow 13°CRain 3%
Summer in San Luis Obispo has typical daily highs of about 22°C and lows of about 13°C, with a 3% chance of rain on a given day.
San Luis Obispo weather in autumnSeptember to November
High 21°CLow 11°CRain 6%
Autumn in San Luis Obispo has typical daily highs of about 21°C and lows of about 11°C, with a 6% chance of rain on a given day.
When is the rainy season in San Luis Obispo?
San Luis Obispo has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 15% in December, the wettest.
What time of year is San Luis Obispo windiest?
Winds in San Luis Obispo are highest in May, averaging 3.7 m/s (13 km/h), and lightest in November, at 2.4 m/s (9 km/h). The prevailing wind is from the W.
What is the average temperature in San Luis Obispo year round?
The average temperature in San Luis Obispo over the whole year is 15°C. August is the hottest month, with highs of about 23°C; February is the coldest, with lows of about 7°C.