Climate Comfort Score
77/100
Good
2026 data Public-data reference. official source
Rancho Bernardo, CA Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991-2020 normals →
30-year climate normals from 1 weather station (1991-2020).
Rancho Bernardo, California has an average annual temperature of 64°F and a climate comfort score of 77/100 (Good). Annual precipitation totals 14.2". Based on NOAA 30-year normals (1991–2020).
Avg Temperature
64°F (18°C)
Avg High
73°F
Avg Low
54°F
Annual Precip
14.2"
Comfort Score
77/100
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) 77.0%
National median (≈55)
PlainClimate composite — temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Rancho Bernardo area.
Warming context for Rancho Bernardo
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Rancho Bernardo 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 | 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
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
Related Data
PlainEnviro
EPA environmental data — pollution, water quality, and environmental health by location
PlainCarbon
Carbon emissions data — greenhouse gas reporting and facility-level CO2 data
PlainHazard
Natural disaster data — weather-related hazards, FEMA declarations, and risk profiles
PlainAirData
EPA air quality data — AQI readings, pollutant levels, and air quality trends
Climate Guides
Climate Insight: Rancho Bernardo, CA
The NOAA 1991–2020 climate normals describe Rancho Bernardo, California as a location with an annual average temperature of 64°F, ranging from a mean daily high of 73°F to a mean daily low of 54°F. August is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00047248, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Rancho Bernardo receives roughly 14.2 inches of precipitation each year, predominantly as rainfall. Growing-season length varies with elevation and microclimate, with the last spring freeze near January 5 and the first fall freeze near January 2. For energy use, 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 77/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows — shoulder seasons for mild highs and lows, peak summer for August-driven heat, or deep winter for December-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
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 77/100 (Good). This score considers temperature mildness, humidity, precipitation, and extreme weather frequency.
When is the growing season in Rancho Bernardo? ▼
Growing season data is not available for Rancho Bernardo.
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. Higher heating degree days indicate greater winter energy demand, while higher cooling degree days indicate greater summer cooling needs.
Where does this Rancho Bernardo climate data come from? ▼
All climate data comes from NOAA U.S. Climate Normals v1.0.1, covering the 30-year period from 1991 to 2020. Data is collected from weather station USC00047248. These 30-year averages are the standard reference for typical weather conditions.
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
