San Francisco Oceanside, CA Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from San Francisco Oceanside's primary NOAA station, SAN FRANCISCO OCEANSIDE.
The climate verdict for San Francisco Oceanside
A compact 7.7°F seasonal swing gives San Francisco Oceanside, California a steadier-than-extreme annual shape. NOAA reports an annual average of 56°F. It scores 88/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 89% of them.
- 56°F
- yearly average temperature, NOAA normal
- 88/100
- comfort score, above 89% of station-mapped location scores
- 20.6"
- annual precipitation
San Francisco Oceanside: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00047767 · San Francisco Oceanside, CA 56°F mean · 20.6" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-DRY · SWING-NARROW · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 56°F
- RANK-UPPER #4,391
- PHOTO-FINISH ≈ Scotia
- PRCP-DRY 20.6"
- SWING-NARROW 8°F
- COMF-TOP 88/100
- LOAD-HEAT 3,260 HDD
- STN-1 USC00047767
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Scotia, CA ( -0.5 °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.
- Hot Watsonville, CA 57°F
- Near Monterey, CA 57°F
- Near Shelter Cove Av…, CA 57°F
- San Francisco O… (this station) 56°F
- Cold Scotia, CA 56°F
Climate Living Index · San Francisco Oceanside
San Francisco Oceanside: 76/100 · grade B
San Francisco Oceanside publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for San Francisco Oceanside, not an official NOAA rating. Rankings still use Comfort Score 88/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Snowfall burden | 0.0 inches/year | 90/100 · A |
| Annual temperature balance | 56.1°F · 11.4° from 67.5°F | 63/100 · C |
| Precipitation balance | 20.6 in · 14.4 from 35 in | 50/100 · D |
San Francisco Oceanside · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
San Francisco Oceanside is a temperate Köppen climate: Csb
Coldest-month mean 52.4°F and warmest-month mean 60.1°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 60.1°F
- Coldest month
- 52.4°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 · heating-led station
Where San Francisco Oceanside sits across the climate record
Three NOAA fields for San Francisco Oceanside's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 64th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 71%
- San Francisco Oceanside's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 100%
- Warmest-to-coldest month gap for San Francisco Oceanside is compact versus 6,861 complete station-years.
How San Francisco Oceanside compares across U.S. station-mapped locations
San Francisco Oceanside's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
88 Top 11% score exceeds 89% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). This entry sits in this band.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 59°F (15°C) | 46°F (8°C) | 52°F (11°C) | 3.9" | 0.0" | 0.2 | 0.0 |
| February | 60°F (16°C) | 47°F (8°C) | 54°F (12°C) | 4.0" | 0.0" | 0.1 | 0.0 |
| March | 61°F (16°C) | 48°F (9°C) | 54°F (12°C) | 3.0" | 0.0" | 0.0 | 0.0 |
| April | 60°F (16°C) | 49°F (10°C) | 55°F (13°C) | 1.4" | 0.0" | 0.1 | 0.0 |
| May | 60°F (15°C) | 51°F (11°C) | 55°F (13°C) | 0.6" | 0.0" | 0.0 | 0.0 |
| June | 61°F (16°C) | 53°F (12°C) | 57°F (14°C) | 0.2" | 0.0" | 0.0 | 0.0 |
| July | 62°F (17°C) | 54°F (12°C) | 58°F (15°C) | 0.0" | 0.0" | 0.0 | 0.0 |
| August | 64°F (18°C) | 55°F (13°C) | 60°F (15°C) | 0.1" | 0.0" | 0.0 | 0.0 |
| September | 65°F (18°C) | 55°F (13°C) | 60°F (16°C) | 0.1" | 0.0" | 0.0 | 0.2 |
| October | 66°F (19°C) | 53°F (12°C) | 60°F (15°C) | 0.9" | 0.0" | 0.0 | 0.4 |
| November | 64°F (18°C) | 50°F (10°C) | 57°F (14°C) | 2.2" | 0.0" | 0.2 | 0.0 |
| December | 59°F (15°C) | 46°F (8°C) | 53°F (11°C) | 4.2" | 0.0" | 0.5 | 0.0 |
The year, day by day
The calendar barely moves in San Francisco Oceanside: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 45°F near December 26 and 67°F near October 16.
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 45°F around December 26.
Where the wet dates fall
The likeliest wet date is December 17, when 39% of years recorded at least a hundredth of an inch. The driest is July 22 at 1%. Summed across the calendar, that is about 66 wet dates a year.
The widest day
November 2 carries the biggest normal gap between afternoon and dawn, 15°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for San Francisco Oceanside.
Where San Francisco Oceanside Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 15°F.
San Francisco Oceanside 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 and snowfall
10.6 days with precipitation
10.7 days with precipitation
10.0 days with precipitation
6.1 days with precipitation
3.5 days with precipitation
1.2 days with precipitation
0.2 days with precipitation
0.5 days with precipitation
0.9 days with precipitation
3.0 days with precipitation
6.9 days with precipitation
12.2 days with precipitation
San Francisco Oceanside's wet season runs through the cold months
December, January and February carry 59% of the year's precipitation here, while June through August contribute 1%. 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 7.7°F seasonal spread.
- Wettest month
- December, 4.2"
- Driest month
- July, 0.0"
- Wettest three months
- December, February, January (59% 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 San Francisco Oceanside's precipitation splits across the calendar
About 66 days a year record measurable precipitation here, carrying 20.6" between them, or roughly 0.31 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.
San Francisco Oceanside's record shows no measurable snowfall
This station measured snowfall across the 1991-2020 period and recorded none: the annual normal is 0.0 inches. That is a measured zero rather than missing data, which is a meaningful distinction here , most stations in the database simply do not report snow at all, and those pages say nothing about it.
A thirty-year normal of zero describes the typical year at this station. It is not a claim that snow has never fallen in the area.
Frost Dates & Growing Season
First Fall Freeze
December 25
50% probability date
Last Spring Freeze
December 30
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,260
Higher = more heating needed
Cooling Degree Days
29
Higher = more cooling needed
Warmest Month
September
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside CA closest to San Francisco Oceanside 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 (56°F here).
- Bushland, TX 56°F · 0.0°F off
- Colorado City, AZ 56°F · 0.0°F off
- Cullowhee, NC 56°F · 0.0°F off
- Eldon, MO 56°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (20.6" here), excluding temperature-peer places.
- Farmington, UT 20.6" · 0.0" off
- Custer, SD 20.7" · 0.0" off
- Gruver, TX 20.6" · 0.0" off
- Arthur, NE 20.6" · 0.0" off
Data-derived climate profile
How San Francisco Oceanside's climate pattern fits together
heating led · moderate · low swing
Heating is the larger measured load in San Francisco Oceanside, at 3,260 degree days versus 29 for cooling. Unlike a strongly continental record, however, its 7.7°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
A frost-free growing-season length is not available for San Francisco Oceanside. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
Temperature varies within a narrow 7.7°F band across the normal year. September and January mark the typical warm and cold ends of the calendar. The annual average is 56°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
San Francisco Oceanside's 20.6 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Recorded annual snowfall is negligible. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from San Francisco Oceanside's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for San Francisco Oceanside, not an official NOAA class or a year-ahead forecast.
Questions about San Francisco Oceanside's climate
How much rain does San Francisco Oceanside get? ▼
How much energy does heating and cooling require in San Francisco Oceanside? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from San Francisco Oceanside's primary station: SAN FRANCISCO OCEANSIDE (USC00047767). 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 San Francisco Oceanside; 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 San Francisco Oceanside 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.