Rancho Bernardo, CA Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Rancho Bernardo's primary NOAA station, RANCHO BERNARDO.
The climate verdict for Rancho Bernardo
Dryness leads the climate profile for Rancho Bernardo, California, with 14.2 inches of precipitation a year. NOAA records an annual average of 64°F. August is the warmest month at 73°F and December the coldest at 55°F.
- 64°F
- average temperature, NOAA 1991-2020 normal
- 14.2"
- yearly precipitation total
Rancho Bernardo: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00047248 · Rancho Bernardo, CA 64°F mean · 14.2" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-DRY · SWING-NARROW · COMF-UNK · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 64°F
- RANK-UPPER #5,763
- PHOTO-FINISH ≈ Alvord
- PRCP-DRY 14.2"
- SWING-NARROW 18°F
- COMF-UNK Comfort n/a
- LOAD-MIX H/C balanced
- STN-1 USC00047248
- BOOK-FULL 5/6 fields
Nearest mean-temperature peer: Alvord, TX (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every CA station list.
- Rancho Bernardo (this station) 64°F
- Hot Ash Mtn, CA 64°F
- Near Alvord, TX 64°F
- Near Andrews, SC 64°F
- Near Arkansas Post, AR 64°F
Climate Living Index · Rancho Bernardo
Rancho Bernardo: 78/100 · grade B
Rancho Bernardo publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Rancho Bernardo, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Annual temperature balance | 63.5°F · 4.0° from 67.5°F | 88/100 · A |
| Precipitation balance | 14.2 in · 20.8 from 35 in | 25/100 · F |
Rancho Bernardo · 2026-08-04 · NOAA NCEI Climate Normals · method .
Rancho Bernardo is a temperate Köppen climate: Csa
Coldest-month mean 55.2°F and warmest-month mean 73.4°F place this station in temperate, dry-summer, hot summer climates (Csa). Class Csa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, hot summer.
- Köppen code
- Csa
- Group
- Temperate
- Warmest month
- 73.4°F
- Coldest month
- 55.2°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · balanced station
Where Rancho Bernardo sits across the climate record
Three NOAA fields for Rancho Bernardo's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 16% warmest
- Among 6,861 stations, Rancho Bernardo sits in the warmer third of annual means.
- Annual precipitation
- Drier than 85%
- Rancho Bernardo's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 97%
- Warmest-to-coldest month gap for Rancho Bernardo is compact versus 6,861 complete station-years.
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 |
The year, day by day
The calendar barely moves in Rancho Bernardo: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 44°F near December 13 and 83°F near August 18.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 44°F around December 13.
The widest day
December 13 carries the biggest normal gap between afternoon and dawn, 22°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Rancho Bernardo.
Where Rancho Bernardo Stands Nationally
A drier-than-most normal water year — around 14 inches, below what four out of five ranked stations collect.
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
Rancho Bernardo earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
Rancho Bernardo's wet season runs through the cold months
December, January and February carry 60% of the year's precipitation here, while June through August contribute 2%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows an unusually narrow 18.2°F seasonal spread.
- Wettest month
- February, 3.4"
- Driest month
- August, 0.1"
- Wettest three months
- February, January, December (60% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
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
Nationwide similar cities
Other rankable U.S. places outside CA closest to Rancho Bernardo on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (64°F here).
- Alvord, TX 64°F · 0.0°F off
- Andrews, SC 64°F · 0.0°F off
- Bonham, TX 64°F · 0.0°F off
- Hemingway, SC 64°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (14.2" here), excluding temperature-peer places.
- Levan, UT 14.1" · 0.0" off
- Wheatland, WY 14.1" · 0.0" off
- Wolf Point, MT 14.2" · 0.0" off
- Brighton, CO 14.1" · 0.1" off
Scarce-water calendar
Where Rancho Bernardo's limited precipitation lands
mixed demand · dry · low swing
Local precipitation is sparse in this otherwise mixed profile. The station reports 14.2 inches annually, within PlainClimate's dry band. Snowfall is not added to the interpretation because its annual value is missing. The monthly distribution matters because the total alone does not reveal the timing.
The calendar stays thermally compact and dry. August and December mark the typical warm and cold ends of the calendar, only 18.2°F apart, while the annual precipitation total remains below PlainClimate's dry threshold. The annual average is 64°F. The monthly rows show whether that limited precipitation is spread through the year or concentrated in a shorter interval.
Rancho Bernardo combines a compact 18.2°F annual temperature range with meaningful demand on both sides of the thermostat: 1,474 heating and 924 cooling degree days. The balance matters more here than either annual total in isolation.
A frost-free growing-season length is not available for Rancho Bernardo. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
Rancho Bernardo wettest normal
February
February concentrates the scarce annual total (14.2 inches).
Rancho Bernardo driest normal
August
August is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Rancho Bernardo's climate
How dry is Rancho Bernardo? ▼
How much energy does heating and cooling require in Rancho Bernardo? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Rancho Bernardo's primary station: RANCHO BERNARDO (USC00047248). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Rancho Bernardo; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Rancho Bernardo comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.