Climate Comfort Score
75/100
Good
NOAA 1991–2020 normals 69°F annual avg Public-domain federal data
Chiriaco Summit, CA Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 69°F
- Avg annual temp
- 75/100
- Comfort score
- 4.6"
- Annual precip
- 315d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Chiriaco Summit
Chiriaco Summit, California averages 69°F a year and scores 75/100 on the comfort index - good, milder than 72% of U.S. cities.
- 69°F
- average temperature, NOAA 1991-2020 normal
- 75/100
- comfort score, milder than 72% of U.S. cities
- 4.6"
- precipitation, annual total
- 315 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
69°F (21°C)
Avg High
84°F
Avg Low
55°F
Annual Precip
4.6"
Comfort Score
75/100
Good
Avg Annual Temperature
69°F
30-year mean (NOAA NCEI)
Annual Precipitation
4.6"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Chiriaco Summit) 75.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Chiriaco Summit area.
How Chiriaco Summit compares to every U.S. city
Chiriaco Summit's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
75 Top 28% higher than 72% 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 Chiriaco Summit
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Chiriaco Summit 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 | 66°F (19°C) | 40°F (4°C) | 53°F (12°C) | 0.8" | 2.6 | 0.0 |
| February | 67°F (20°C) | 42°F (5°C) | 55°F (13°C) | 0.9" | 2.8 | 0.1 |
| March | 75°F (24°C) | 46°F (8°C) | 60°F (16°C) | 0.5" | 0.2 | 1.5 |
| April | 83°F (28°C) | 51°F (11°C) | 67°F (19°C) | 0.2" | 0.0 | 6.2 |
| May | 89°F (32°C) | 58°F (15°C) | 74°F (23°C) | 0.1" | 0.0 | 16.0 |
| June | 99°F (37°C) | 66°F (19°C) | 82°F (28°C) | 0.0" | 0.0 | 27.4 |
| July | 103°F (39°C) | 74°F (23°C) | 88°F (31°C) | 0.3" | 0.0 | 30.9 |
| August | 102°F (39°C) | 75°F (24°C) | 88°F (31°C) | 0.3" | 0.0 | 30.3 |
| September | 96°F (36°C) | 68°F (20°C) | 82°F (28°C) | 0.5" | 0.0 | 26.7 |
| October | 86°F (30°C) | 56°F (13°C) | 71°F (22°C) | 0.2" | 0.0 | 12.2 |
| November | 74°F (24°C) | 46°F (8°C) | 60°F (16°C) | 0.3" | 0.7 | 0.8 |
| December | 64°F (18°C) | 40°F (4°C) | 52°F (11°C) | 0.6" | 3.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 0.8"
February 0.9"
March 0.5"
April 0.2"
May 0.1"
June 0.0"
July 0.3"
August 0.3"
September 0.5"
October 0.2"
November 0.3"
December 0.6"
Frost Dates & Growing Season
First Fall Freeze
December 17
50% probability date
Last Spring Freeze
February 5
50% probability date
Growing Season
315 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,514
Higher = more heating needed
Cooling Degree Days
3,158
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Chiriaco Summit's climate means for you
Chiriaco Summit runs 69°F a year - peaking in July, coldest in December.
- Gardeners get about 315 frost-free days, with the last spring freeze near February 5 - plan the planting calendar around it, not the regional average.
- Energy bills track 1,514 heating and 3,158 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: Chiriaco Summit, CA
Based on station USC00041738 feeding NOAA's 1991–2020 climate normals, Chiriaco Summit, California averages 69°F a year, ranging from a mean daily high of 84°F to a mean daily low of 55°F. July 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. Chiriaco Summit receives roughly 4.6 inches of precipitation each year, predominantly as rainfall. The frost-free season averages 315 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near February 5 and the first fall freeze near December 17. For energy use, 1,514 heating degree days and 3,158 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Chiriaco Summit scores 75/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings December-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Chiriaco Summit, CA? ▼
The average annual temperature in Chiriaco Summit, California is 69°F. The warmest month averages 103°F (39°C) and the coldest averages 40°F (4°C).
How much rain does Chiriaco Summit get? ▼
Chiriaco Summit receives 4.6 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Chiriaco Summit? ▼
Chiriaco Summit has a climate comfort score of 75/100 (Good), milder than 72% of U.S. cities in the PlainClimate database.
When is the growing season in Chiriaco Summit? ▼
Chiriaco Summit has approximately 315 frost-free days per year, with the last spring freeze around February 5 and the first fall freeze around December 17.
How much energy does heating and cooling require in Chiriaco Summit? ▼
Chiriaco Summit has 1,514 heating degree days and 3,158 cooling degree days annually, a cooling-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 Chiriaco Summit climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00041738 near Chiriaco Summit.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00041738. 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.