Climate Comfort Score
34/100
Below Average
NOAA 1991–2020 normals 44°F annual avg Public-domain federal data
San Luis, CO Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 44°F
- Avg annual temp
- 34/100
- Comfort score
- 9.0"
- Annual precip
- 115d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for San Luis
San Luis, Colorado averages 44°F a year and scores 34/100 on the comfort index - below average, milder than 1% of U.S. cities.
- 44°F
- average temperature, NOAA 1991-2020 normal
- 34/100
- comfort score, milder than 1% of U.S. cities
- 9.0"
- precipitation, annual total
- 115 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
44°F (7°C)
Avg High
60°F
Avg Low
28°F
Annual Precip
9.0"
Comfort Score
34/100
Below Average
Avg Annual Temperature
44°F
30-year mean (NOAA NCEI)
Annual Precipitation
9.0"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (San Luis) 34.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the San Luis area.
How San Luis compares to every U.S. city
San Luis's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
34 Top 99% higher than 1% 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
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for San Luis captures average conditions across the spread shown, the most recent decade is 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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 37°F (3°C) | 6°F (-14°C) | 22°F (-6°C) | 0.4" | 31.0 | 0.0 |
| February | 41°F (5°C) | 12°F (-11°C) | 27°F (-3°C) | 0.5" | 27.7 | 0.0 |
| March | 52°F (11°C) | 23°F (-5°C) | 37°F (3°C) | 0.3" | 29.6 | 0.0 |
| April | 58°F (15°C) | 27°F (-3°C) | 43°F (6°C) | 0.6" | 23.6 | 0.0 |
| May | 68°F (20°C) | 35°F (1°C) | 51°F (11°C) | 0.7" | 9.7 | 0.1 |
| June | 79°F (26°C) | 42°F (5°C) | 60°F (16°C) | 0.8" | 1.4 | 0.3 |
| July | 82°F (28°C) | 48°F (9°C) | 65°F (18°C) | 1.5" | 0.1 | 1.1 |
| August | 79°F (26°C) | 47°F (9°C) | 63°F (17°C) | 1.3" | 0.0 | 0.1 |
| September | 74°F (23°C) | 39°F (4°C) | 57°F (14°C) | 1.0" | 4.8 | 0.0 |
| October | 63°F (17°C) | 28°F (-2°C) | 46°F (8°C) | 0.9" | 22.9 | 0.0 |
| November | 49°F (10°C) | 18°F (-8°C) | 33°F (1°C) | 0.5" | 28.8 | 0.0 |
| December | 39°F (4°C) | 9°F (-13°C) | 24°F (-5°C) | 0.4" | 31.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 0.4"
2.1 days with precipitation
February 0.5"
4.0 days with precipitation
March 0.3"
3.0 days with precipitation
April 0.6"
3.1 days with precipitation
May 0.7"
3.4 days with precipitation
June 0.8"
3.6 days with precipitation
July 1.5"
6.8 days with precipitation
August 1.3"
8.5 days with precipitation
September 1.0"
4.1 days with precipitation
October 0.9"
3.5 days with precipitation
November 0.5"
2.4 days with precipitation
December 0.4"
2.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 23
50% probability date
Last Spring Freeze
May 31
50% probability date
Growing Season
115 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,719
Higher = more heating needed
Cooling Degree Days
75
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What San Luis's climate means for you
San Luis runs 44°F a year - peaking in July, coldest in January.
- Gardeners get about 115 frost-free days, with the last spring freeze near May 31 - plan the planting calendar around it, not the regional average.
- Energy bills track 7,719 heating and 75 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, CO
In San Luis, Colorado, the NOAA 1991–2020 climate normals put the annual average temperature at 44°F, ranging from a mean daily high of 60°F to a mean daily low of 28°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00057430, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. San Luis sees about 9.0 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 115 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 31 and the first fall freeze near September 23. On the energy side, 7,719 heating degree days and 75 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 scores 34/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in San Luis, CO? ▼
The average annual temperature in San Luis, Colorado is 44°F. The warmest month averages 82°F (28°C) and the coldest averages 6°F (-14°C).
How much rain does San Luis get? ▼
San Luis receives 9.0 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for San Luis? ▼
San Luis has a climate comfort score of 34/100 (Below Average), milder than 1% of U.S. cities in the PlainClimate database.
When is the growing season in San Luis? ▼
San Luis has approximately 115 frost-free days per year, with the last spring freeze around May 31 and the first fall freeze around September 23.
How much energy does heating and cooling require in San Luis? ▼
San Luis has 7,719 heating degree days and 75 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 climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00057430 near San Luis.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00057430. 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.