Fallbrook, CA Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Fallbrook's primary NOAA station, FALLBROOK 5 NE.
The climate verdict for Fallbrook
Dryness leads the climate profile for Fallbrook, California, with 15.3 inches of precipitation a year. NOAA records an annual average of 65°F. August is the warmest month at 76°F and February the coldest at 57°F.
- 65°F
- average temperature, NOAA 1991-2020 normal
- 15.3"
- precipitation, annual total
Fallbrook: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00053151 · Fallbrook, CA 65°F mean · 15.3" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-DRY · SWING-NARROW · COMF-UNK · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 65°F
- RANK-UPPER #6,038
- PHOTO-FINISH ≈ Acton Rch
- PRCP-DRY 15.3"
- SWING-NARROW 19°F
- COMF-UNK Comfort n/a
- LOAD-MIX H/C balanced
- STN-1 USW00053151
- BOOK-FULL 5/6 fields
Nearest mean-temperature peer: Acton Rch, 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.
- Fallbrook (this station) 65°F
- Hot Georgetown Coun…, SC 65°F
- Near Acton Rch, TX 65°F
- Near Arlington Six F…, TX 65°F
- Near Crossett, AR 65°F
Climate Living Index · Fallbrook
Fallbrook: 81/100 · grade B
Fallbrook publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Fallbrook, 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 | 65.1°F · 2.4° from 67.5°F | 92/100 · A |
| Precipitation balance | 15.3 in · 19.7 from 35 in | 29/100 · F |
Fallbrook · 2026-08-04 · NOAA NCEI Climate Normals · method .
Fallbrook is a temperate Köppen climate: Csa
Coldest-month mean 56.6°F and warmest-month mean 75.5°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
- 75.5°F
- Coldest month
- 56.6°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 Fallbrook sits across the climate record
Three NOAA fields for Fallbrook's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 12% warmest
- Among 6,861 stations, Fallbrook sits in the warmer third of annual means.
- Annual precipitation
- Drier than 82%
- Fallbrook'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 Fallbrook 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 | 68°F (20°C) | 47°F (9°C) | 57°F (14°C) | 3.2" | 0.2 | 0.1 |
| February | 67°F (19°C) | 46°F (8°C) | 57°F (14°C) | 3.7" | 0.0 | 0.2 |
| March | 70°F (21°C) | 48°F (9°C) | 59°F (15°C) | 2.0" | 0.0 | 0.7 |
| April | 72°F (22°C) | 51°F (10°C) | 61°F (16°C) | 1.0" | 0.0 | 2.0 |
| May | 75°F (24°C) | 53°F (12°C) | 64°F (18°C) | 0.4" | 0.0 | 1.9 |
| June | 81°F (27°C) | 56°F (13°C) | 68°F (20°C) | 0.1" | 0.0 | 4.5 |
| July | 87°F (31°C) | 60°F (16°C) | 74°F (23°C) | 0.1" | 0.0 | 10.2 |
| August | 89°F (32°C) | 62°F (17°C) | 76°F (24°C) | 0.2" | 0.0 | 14.4 |
| September | 88°F (31°C) | 62°F (17°C) | 75°F (24°C) | 0.1" | 0.0 | 14.2 |
| October | 83°F (28°C) | 58°F (14°C) | 71°F (21°C) | 0.7" | 0.0 | 8.8 |
| November | 74°F (24°C) | 52°F (11°C) | 63°F (17°C) | 1.1" | 0.0 | 3.5 |
| December | 67°F (19°C) | 46°F (8°C) | 57°F (14°C) | 2.6" | 0.1 | 0.0 |
The year, day by day
The calendar barely moves in Fallbrook: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 46°F near December 14 and 90°F near August 22.
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 46°F around December 14.
Where the wet dates fall
The likeliest wet date is February 27, when 23% of years recorded at least a hundredth of an inch. The driest is August 25 at 4%. Summed across the calendar, that is about 49 wet dates a year.
The widest day
August 8 carries the biggest normal gap between afternoon and dawn, 28°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Fallbrook.
Where Fallbrook Stands Nationally
A drier-than-most normal water year — around 15 inches, below what four out of five ranked stations collect.
Fallbrook earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
5.7 days with precipitation
6.4 days with precipitation
6.3 days with precipitation
4.2 days with precipitation
4.5 days with precipitation
2.3 days with precipitation
1.6 days with precipitation
1.4 days with precipitation
1.8 days with precipitation
3.1 days with precipitation
4.6 days with precipitation
6.5 days with precipitation
Fallbrook's wet season runs through the cold months
December, January and February carry 62% of the year's precipitation here, while June through August contribute 3%. 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 18.9°F seasonal spread.
- Wettest month
- February, 3.7"
- Driest month
- July, 0.1"
- Wettest three months
- February, January, December (62% 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.
How Fallbrook's precipitation splits across the calendar
About 48 days a year record measurable precipitation here, carrying 15.3" between them, or roughly 0.32 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Frost Dates & Growing Season
First Fall Freeze
January 30
50% probability date
Last Spring Freeze
February 2
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,368
Higher = more heating needed
Cooling Degree Days
1,412
Higher = more cooling needed
Warmest Month
August
Coldest Month
February
Nationwide similar cities
Other rankable U.S. places outside CA closest to Fallbrook 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 (65°F here).
- Crossett, AR 65°F · 0.0°F off
- Mcclellanville, SC 65°F · 0.0°F off
- Mineral Wells, TX 65°F · 0.0°F off
- Paint Rock, TX 65°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (15.3" here), excluding temperature-peer places.
- Fortuna, ND 15.3" · 0.0" off
- Bynum, MT 15.3" · 0.0" off
- Carpenter, WY 15.3" · 0.0" off
- Hugo, CO 15.3" · 0.0" off
Data-derived climate profile
How Fallbrook's climate pattern fits together
mixed demand · dry · low swing
Local precipitation is sparse in this otherwise mixed profile. The station reports 15.3 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 February mark the typical warm and cold ends of the calendar, only 18.9°F apart, while the annual precipitation total remains below PlainClimate's dry threshold. The annual average is 65°F. The monthly rows show whether that limited precipitation is spread through the year or concentrated in a shorter interval.
Fallbrook combines a compact 18.9°F annual temperature range with meaningful demand on both sides of the thermostat: 1,368 heating and 1,412 cooling degree days. The balance matters more here than either annual total in isolation.
A frost-free growing-season length is not available for Fallbrook. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
These labels group NOAA 1991-2020 normals from Fallbrook's primary station, where heating and cooling demand are close enough that neither season sets the character on its own. On a balanced station like Fallbrook, the bands are descriptive ranges rather than an official NOAA classification or a forecast.
Questions about Fallbrook's climate
How much rain does Fallbrook get? ▼
How many days above 90°F does Fallbrook get? ▼
How much energy does heating and cooling require in Fallbrook? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Fallbrook's primary station: FALLBROOK 5 NE (USW00053151). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as a census-designated place (GEOID 0623462), not an incorporated municipality. Match rule for Fallbrook: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Fallbrook 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.