Climate Comfort Score
100/100
Excellent
NOAA 1991–2020 normals 61°F annual avg Public-domain federal data
San Luis Obispo Poly, CA Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 61°F
- Avg annual temp
- 100/100
- Comfort score
- 22.4"
- Annual precip
- 343d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for San Luis Obispo Poly
San Luis Obispo Poly, California averages 61°F a year and scores 100/100 on the comfort index - excellent, milder than 99% of U.S. cities.
- 61°F
- average temperature, NOAA 1991-2020 normal
- 100/100
- comfort score, milder than 99% of U.S. cities
- 22.4"
- yearly precipitation total
- 343 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
61°F (16°C)
Avg High
72°F
Avg Low
49°F
Annual Precip
22.4"
Annual Snow
0.0"
Comfort Score
100/100
Excellent
Avg Annual Temperature
61°F
30-year mean (NOAA NCEI)
Annual Precipitation
22.4"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (San Luis Obispo Poly) 100.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the San Luis Obispo Poly area.
How San Luis Obispo Poly compares to every U.S. city
San Luis Obispo Poly's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
100 Top 1% higher than 99% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for San Luis Obispo Poly
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. San Luis Obispo Poly's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 65°F (18°C) | 44°F (7°C) | 54°F (12°C) | 5.1" | 0.0" | 1.0 | 0.0 |
| February | 65°F (18°C) | 44°F (7°C) | 55°F (13°C) | 4.9" | 0.0" | 0.6 | 0.0 |
| March | 67°F (20°C) | 46°F (8°C) | 57°F (14°C) | 3.9" | 0.0" | 0.0 | 0.2 |
| April | 69°F (21°C) | 47°F (8°C) | 58°F (14°C) | 1.4" | 0.0" | 0.0 | 0.7 |
| May | 72°F (22°C) | 49°F (10°C) | 61°F (16°C) | 0.5" | 0.0" | 0.0 | 1.4 |
| June | 76°F (24°C) | 52°F (11°C) | 64°F (18°C) | 0.1" | 0.0" | 0.0 | 1.6 |
| July | 78°F (26°C) | 54°F (12°C) | 66°F (19°C) | 0.1" | 0.0" | 0.0 | 2.2 |
| August | 80°F (27°C) | 55°F (13°C) | 67°F (20°C) | 0.0" | 0.0" | 0.0 | 3.1 |
| September | 80°F (27°C) | 54°F (12°C) | 67°F (19°C) | 0.1" | 0.0" | 0.0 | 4.2 |
| October | 78°F (25°C) | 52°F (11°C) | 65°F (18°C) | 0.8" | 0.0" | 0.0 | 4.8 |
| November | 71°F (22°C) | 47°F (9°C) | 59°F (15°C) | 2.0" | 0.0" | 0.3 | 0.4 |
| December | 64°F (18°C) | 44°F (7°C) | 54°F (12°C) | 3.6" | 0.0" | 0.7 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 5.1"
8.7 days with precipitation
February 4.9"
9.8 days with precipitation
March 3.9"
8.6 days with precipitation
April 1.4"
4.1 days with precipitation
May 0.5"
2.4 days with precipitation
June 0.1"
0.7 days with precipitation
July 0.1"
0.5 days with precipitation
August 0.0"
0.2 days with precipitation
September 0.1"
0.7 days with precipitation
October 0.8"
3.2 days with precipitation
November 2.0"
4.4 days with precipitation
December 3.6"
8.4 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 25
50% probability date
Last Spring Freeze
January 16
50% probability date
Growing Season
343 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,031
Higher = more heating needed
Cooling Degree Days
418
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What San Luis Obispo Poly's climate means for you
San Luis Obispo Poly runs 61°F a year - peaking in August, coldest in December.
- Gardeners get about 343 frost-free days, with the last spring freeze near January 16 - plan the planting calendar around it, not the regional average.
- Energy bills track 2,031 heating and 418 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: San Luis Obispo Poly, CA
Based on station USC00047851 feeding NOAA's 1991–2020 climate normals, San Luis Obispo Poly, California averages 61°F a year, ranging from a mean daily high of 72°F to a mean daily low of 49°F. August is typically the warmest month of the year, while December is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. San Luis Obispo Poly receives roughly 22.4 inches of precipitation each year, with negligible snowfall. The frost-free season averages 343 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near January 16 and the first fall freeze near December 25. For energy use, 2,031 heating degree days and 418 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, San Luis Obispo Poly scores 100/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings August-driven heat, and winter brings December-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in San Luis Obispo Poly, CA? ▼
The average annual temperature in San Luis Obispo Poly, California is 61°F. The warmest month averages 80°F (27°C) and the coldest averages 44°F (7°C).
How much rain does San Luis Obispo Poly get? ▼
San Luis Obispo Poly receives 22.4 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for San Luis Obispo Poly? ▼
San Luis Obispo Poly has a climate comfort score of 100/100 (Excellent), milder than 99% of U.S. cities in the PlainClimate database.
When is the growing season in San Luis Obispo Poly? ▼
San Luis Obispo Poly has approximately 343 frost-free days per year, with the last spring freeze around January 16 and the first fall freeze around December 25.
How much energy does heating and cooling require in San Luis Obispo Poly? ▼
San Luis Obispo Poly has 2,031 heating degree days and 418 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this San Luis Obispo Poly climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00047851 near San Luis Obispo Poly.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00047851. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.