San Francisco Oceanside, California climate: Climate normals at a NOAA weather station
San Francisco Oceanside's normal year runs from 46°F January nights to 65°F September afternoons, with 20.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.4°C, January lows of 8°C, September highs of 18°C, 524 mm of precipitation a year.
- NOAA stationSan Francisco Oceanside
- Station IDUSC00047767
- Location37.73°N 122.51°W
- Elevation8 ft (2 m)
On October 22, the normal high in San Francisco Oceanside is 67°F and the normal low 53°F, and the chance of measurable rain or snow is 12%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for San Francisco Oceanside.
- Jan 59° 46°
- Feb 60° 47°
- Mar 61° 48°
- Apr 60° 49°
- May 60° 51°
- Jun 61° 53°
- Jul 62° 54°
- Aug 64° 55°
- Sep 65° 55°
- Oct 66° 53°
- Nov 64° 50°
- Dec 59° 46°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at San Francisco Oceanside each month?
September is the warmest month, with normal highs of 65°F; January the coldest, with normal lows of 46°F. The most precipitation falls in December (4.22 in), the least in July (0.01 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 59°F | 46°F | 52.4°F | 3.94 | 11 | <1 | <1 | 9 h 50 min |
| February | 60°F | 47°F | 53.5°F | 4.01 | 11 | <1 | <1 | 10 h 50 min |
| March | 61°F | 48°F | 54.4°F | 2.98 | 10 | <1 | <1 | 11 h 50 min |
| April | 60°F | 49°F | 54.8°F | 1.37 | 6 | <1 | <1 | 13 h 10 min |
| May | 60°F | 51°F | 55.4°F | 0.64 | 4 | <1 | <1 | 14 h 10 min |
| June | 61°F | 53°F | 56.8°F | 0.19 | 1 | <1 | <1 | 14 h 50 min |
| July | 62°F | 54°F | 58.1°F | 0.01 | <1 | <1 | <1 | 14 h 30 min |
| August | 64°F | 55°F | 59.5°F | 0.05 | 1 | <1 | <1 | 13 h 40 min |
| September | 65°F | 55°F | 60.1°F | 0.11 | 1 | <1 | <1 | 12 h 30 min |
| October | 66°F | 53°F | 59.8°F | 0.90 | 3 | <1 | <1 | 11 h 20 min |
| November | 64°F | 50°F | 56.5°F | 2.22 | 7 | <1 | <1 | 10 h 10 min |
| December | 59°F | 46°F | 52.5°F | 4.22 | 12 | <1 | 1 | 9 h 30 min |
| Year (annual) | 62°F | 51°F | 56.1°F | 20.64 | 66 | 1 | 1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 15°C | 8°C | 11.3°C | 100 mm |
| February | 16°C | 8°C | 11.9°C | 102 mm |
| March | 16°C | 9°C | 12.4°C | 76 mm |
| April | 16°C | 10°C | 12.7°C | 35 mm |
| May | 15°C | 11°C | 13.0°C | 16 mm |
| June | 16°C | 12°C | 13.8°C | 5 mm |
| July | 17°C | 12°C | 14.5°C | 0 mm |
| August | 18°C | 13°C | 15.3°C | 1 mm |
| September | 18°C | 13°C | 15.6°C | 3 mm |
| October | 19°C | 12°C | 15.4°C | 23 mm |
| November | 18°C | 10°C | 13.6°C | 56 mm |
| December | 15°C | 8°C | 11.4°C | 107 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00047767; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at San Francisco Oceanside?
Normal highs sit between 65°F and 85°F in September and October. Of those, September has the fewest days with rain (1).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00047767.
When is the last frost at San Francisco Oceanside?
A night at 32°F or colder comes in only 22% of years in San Francisco Oceanside (NOAA). NOAA's median date of the last spring frost is December 30 and of the first autumn frost December 25.
NOAA puts the median frost-free season at 365 days, and the season without a hard freeze (28°F) at 365 days.
The USDA's 2023 Plant Hardiness Zone Map puts San Francisco Oceanside in zone 10b in ZIP code 94132, the nearest ZIP area.
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00047767; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at San Francisco Oceanside?
In a normal year in San Francisco Oceanside, 1 day a year reaches 90°F, 1 night falls to 32°F or colder and 66 days bring measurable precipitation.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 1a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 66a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00047767.
How sunny is it at San Francisco Oceanside?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds at San Francisco Oceanside, 4.7 kWh per square metre a day. June is the sunniest month (84%) and December the cloudiest (74%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 76% | 2.5 |
| February | 77% | 3.4 |
| March | 79% | 4.6 |
| April | 82% | 6.0 |
| May | 81% | 6.7 |
| June | 84% | 7.3 |
| July | 78% | 6.5 |
| August | 77% | 5.8 |
| September | 82% | 5.1 |
| October | 83% | 4.0 |
| November | 81% | 2.8 |
| December | 74% | 2.1 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does San Francisco Oceanside record?
A normal year at San Francisco Oceanside brings 3,260 heating degree days, 39% fewer than the median U.S. place (5,373), and 29 cooling degree days, 97% fewer than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,303 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 392 | 0 |
| February | 322 | 0 |
| March | 331 | 0 |
| April | 308 | 1 |
| May | 298 | 0 |
| June | 246 | 0 |
| July | 216 | 0 |
| August | 172 | 3 |
| September | 153 | 8 |
| October | 175 | 14 |
| November | 258 | 3 |
| December | 389 | 0 |
| Year (annual) | 3,260 | 29 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00047767. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does San Francisco Oceanside's climate compare?
San Francisco Oceanside is warmer than 46 of the 219 places with their own NOAA record in California, and wetter than 140. Across the 7,247 U.S. stations with normals, its annual mean of 56.1°F is warmer than 64%.
In the Köppen classification computed from these normals, San Francisco Oceanside is Csb: temperate, dry-summer, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near San Francisco Oceanside share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Daly City, CAalso near: San Francisco (5 mi, 57.7°F a year); Pacifica (8 mi, 57.4°F a year)101,418 people · 3 mi SE
- Broadmoor, CA4,467 people · 3 mi SE
- Colma, CA1,428 people · 5 mi SE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about San Francisco Oceanside's climate
What is the coldest month at San Francisco Oceanside?
January, with a normal high of 59°F and a normal low of 46°F. The warmest is September (65°F by day, 55°F at night).
Does it snow at San Francisco Oceanside?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at San Francisco Oceanside?
December, with 4.22 in of precipitation in a normal year; the driest is July with 0.01 in.
What plant hardiness zone is San Francisco Oceanside in?
The USDA's 2023 map puts San Francisco Oceanside in zone 10b in ZIP code 94132, the nearest ZIP area.
Nearby and next
- California climateThe statewide normals and every place in the state
- San Francisco, CA5 miles from this station, 57.7°F a year
- Pacifica, CA9 miles from this station, 57.4°F a year
- Oakland Museum, CA14 miles from this station, 59.6°F a year
- Richmond, CA15 miles from this station, 58.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made