Climate Comfort Score
79/100
Good
NOAA 1991–2020 normals 56°F annual avg Public-domain federal data
San Francisco Oceanside, CA Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 56°F
- Avg annual temp
- 79/100
- Comfort score
- 20.6"
- Annual precip
- -5d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for San Francisco Oceanside
San Francisco Oceanside, California averages 56°F a year and scores 79/100 on the comfort index - good, milder than 82% of U.S. cities.
- 56°F
- yearly average temperature, NOAA normal
- 79/100
- comfort score, milder than 82% of U.S. cities
- 20.6"
- annual precipitation
- -5 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
56°F (13°C)
Avg High
62°F
Avg Low
51°F
Annual Precip
20.6"
Annual Snow
0.0"
Comfort Score
79/100
Good
Avg Annual Temperature
56°F
30-year mean (NOAA NCEI)
Annual Precipitation
20.6"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (San Francisco Oceanside) 79.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the San Francisco Oceanside area.
How San Francisco Oceanside compares to every U.S. city
San Francisco Oceanside's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
79 Top 18% higher than 82% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for San Francisco Oceanside
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for San Francisco Oceanside 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 | 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 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 3.9"
10.6 days with precipitation
February 4.0"
10.7 days with precipitation
March 3.0"
10.0 days with precipitation
April 1.4"
6.1 days with precipitation
May 0.6"
3.5 days with precipitation
June 0.2"
1.2 days with precipitation
July 0.0"
0.2 days with precipitation
August 0.1"
0.5 days with precipitation
September 0.1"
0.9 days with precipitation
October 0.9"
3.0 days with precipitation
November 2.2"
6.9 days with precipitation
December 4.2"
12.2 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 25
50% probability date
Last Spring Freeze
December 30
50% probability date
Growing Season
-5 days
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
What San Francisco Oceanside's climate means for you
San Francisco Oceanside runs 56°F a year - peaking in September, coldest in January.
- Gardeners get about -5 frost-free days, with the last spring freeze near December 30 - plan the planting calendar around it, not the regional average.
- Energy bills track 3,260 heating and 29 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: San Francisco Oceanside, CA
In San Francisco Oceanside, California, the NOAA 1991–2020 climate normals put the annual average temperature at 56°F, ranging from a mean daily high of 62°F to a mean daily low of 51°F. September is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00047767, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. San Francisco Oceanside sees about 20.6 inches of precipitation a year, with negligible snowfall. The frost-free season averages -5 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near December 30 and the first fall freeze near December 25. On the energy side, 3,260 heating degree days and 29 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, San Francisco Oceanside scores 79/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings September-driven heat, and winter brings January-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in San Francisco Oceanside, CA? ▼
The average annual temperature in San Francisco Oceanside, California is 56°F. The warmest month averages 66°F (19°C) and the coldest averages 46°F (8°C).
How much rain does San Francisco Oceanside get? ▼
San Francisco Oceanside receives 20.6 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for San Francisco Oceanside? ▼
San Francisco Oceanside has a climate comfort score of 79/100 (Good), milder than 82% of U.S. cities in the PlainClimate database.
When is the growing season in San Francisco Oceanside? ▼
San Francisco Oceanside has approximately -5 frost-free days per year, with the last spring freeze around December 30 and the first fall freeze around December 25.
How much energy does heating and cooling require in San Francisco Oceanside? ▼
San Francisco Oceanside has 3,260 heating degree days and 29 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this San Francisco Oceanside climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00047767 near San Francisco Oceanside.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00047767. 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
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.