Climate Comfort Score
74/100
Good
NOAA 1991–2020 normals 64°F annual avg Public-domain federal data
Rancho Bernardo, CA Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 64°F
- Avg annual temp
- 74/100
- Comfort score
- 14.2"
- Annual precip
- -3d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Rancho Bernardo
Rancho Bernardo, California averages 64°F a year and scores 74/100 on the comfort index - good, milder than 71% of U.S. cities.
- 64°F
- average temperature, NOAA 1991-2020 normal
- 74/100
- comfort score, milder than 71% of U.S. cities
- 14.2"
- yearly precipitation total
- -3 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
64°F (18°C)
Avg High
73°F
Avg Low
54°F
Annual Precip
14.2"
Comfort Score
74/100
Good
Avg Annual Temperature
64°F
30-year mean (NOAA NCEI)
Annual Precipitation
14.2"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Rancho Bernardo) 74.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Rancho Bernardo area.
How Rancho Bernardo compares to every U.S. city
Rancho Bernardo's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
74 Top 29% higher than 71% 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 Rancho Bernardo
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Rancho Bernardo'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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 67°F (20°C) | 46°F (8°C) | 57°F (14°C) | 2.8" | 0.3 | 0.0 |
| February | 67°F (19°C) | 46°F (8°C) | 56°F (13°C) | 3.4" | 0.1 | 0.1 |
| March | 68°F (20°C) | 49°F (9°C) | 58°F (15°C) | 2.0" | 0.0 | 0.6 |
| April | 70°F (21°C) | 51°F (11°C) | 61°F (16°C) | 1.1" | 0.0 | 0.4 |
| May | 72°F (22°C) | 55°F (13°C) | 64°F (18°C) | 0.4" | 0.0 | 1.4 |
| June | 76°F (24°C) | 58°F (14°C) | 67°F (19°C) | 0.1" | 0.0 | 0.9 |
| July | 82°F (28°C) | 63°F (17°C) | 72°F (22°C) | 0.1" | 0.0 | 2.5 |
| August | 83°F (28°C) | 64°F (18°C) | 73°F (23°C) | 0.1" | 0.0 | 4.8 |
| September | 81°F (27°C) | 60°F (16°C) | 71°F (22°C) | 0.2" | 0.0 | 5.5 |
| October | 78°F (25°C) | 57°F (14°C) | 67°F (20°C) | 0.7" | 0.0 | 4.2 |
| November | 71°F (22°C) | 50°F (10°C) | 61°F (16°C) | 1.1" | 0.0 | 0.6 |
| December | 66°F (19°C) | 44°F (7°C) | 55°F (13°C) | 2.3" | 0.2 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 2.8"
February 3.4"
March 2.0"
April 1.1"
May 0.4"
June 0.1"
July 0.1"
August 0.1"
September 0.2"
October 0.7"
November 1.1"
December 2.3"
Frost Dates & Growing Season
First Fall Freeze
January 2
50% probability date
Last Spring Freeze
January 5
50% probability date
Growing Season
-3 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,474
Higher = more heating needed
Cooling Degree Days
924
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What Rancho Bernardo's climate means for you
Rancho Bernardo runs 64°F a year - peaking in August, coldest in December.
- Gardeners get about -3 frost-free days, with the last spring freeze near January 5 - plan the planting calendar around it, not the regional average.
- Energy bills track 1,474 heating and 924 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: Rancho Bernardo, CA
Rancho Bernardo, California runs an annual average of 64°F, ranging from a mean daily high of 73°F to a mean daily low of 54°F, per NOAA's 1991–2020 climate normals. August is typically the warmest month of the year, while December is the coldest. Drawn from station USC00047248, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Anyone planning to live, garden, or travel in Rancho Bernardo should weigh precipitation alongside temperature: the annual average runs 14.2 inches, predominantly as rainfall. The frost-free season averages -3 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near January 5 and the first fall freeze near January 2. And on the energy front, 1,474 heating degree days and 924 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Rancho Bernardo scores 74/100 (Good), 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, August-driven heat peaks in summer, and December-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 Rancho Bernardo, CA? ▼
The average annual temperature in Rancho Bernardo, California is 64°F. The warmest month averages 83°F (28°C) and the coldest averages 44°F (7°C).
How much rain does Rancho Bernardo get? ▼
Rancho Bernardo receives 14.2 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Rancho Bernardo? ▼
Rancho Bernardo has a climate comfort score of 74/100 (Good), milder than 71% of U.S. cities in the PlainClimate database.
When is the growing season in Rancho Bernardo? ▼
Rancho Bernardo has approximately -3 frost-free days per year, with the last spring freeze around January 5 and the first fall freeze around January 2.
How much energy does heating and cooling require in Rancho Bernardo? ▼
Rancho Bernardo has 1,474 heating degree days and 924 cooling degree days annually, a fairly balanced heating/cooling split. 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 Rancho Bernardo climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00047248 near Rancho Bernardo.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00047248. 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.