San Marcos endures about 25 more days above 90 °F each year.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Oceanside | Metric | San Marcos |
|---|---|---|
| 276 days | Sunny daysclear or partly cloudy skies | 276 days |
| 15 in | Precipitationper year | 15 in |
| 38 days | Wet daysrain or snow per year | 38 days |
| 0 in | Snowfallper year | 0 in |
| 7 days | Hot daysabove 90 °F | 32 days |
| 5 days | Freezing nightsat or below 32 °F | 1 days |
| 74% | Humidityaverage relative | 73% |
| 61 °F | Average temperatureyear round | 64 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oceanside high | 66 | 65 | 66 | 68 | 69 | 72 | 76 | 78 | 77 | 74 | 70 | 65 |
| San Marcos high | 67 | 67 | 68 | 71 | 73 | 77 | 82 | 84 | 82 | 78 | 73 | 66 |
| Oceanside low | 43 | 44 | 47 | 49 | 55 | 59 | 63 | 63 | 60 | 54 | 46 | 42 |
| San Marcos low | 46 | 47 | 49 | 52 | 56 | 60 | 64 | 65 | 63 | 58 | 50 | 45 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oceanside | 2.9 | 3.6 | 2.2 | 1.1 | 0.5 | 0.1 | 0.1 | 0.0 | 0.2 | 0.7 | 1.1 | 2.1 |
| San Marcos | 2.9 | 3.6 | 2.2 | 1.1 | 0.5 | 0.1 | 0.1 | 0.0 | 0.2 | 0.7 | 1.1 | 2.1 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oceanside | 20 | 17 | 19 | 21 | 21 | 25 | 28 | 30 | 27 | 25 | 23 | 20 |
| San Marcos | 20 | 17 | 19 | 21 | 21 | 25 | 28 | 30 | 27 | 25 | 23 | 20 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Oceanside vs another city
- Oceanside vs Vista, CA
- Oceanside vs Camp Pendleton South, CA
- Oceanside vs Camp Pendleton Mainside, CA
- Oceanside vs Carlsbad, CA
- Oceanside vs Fallbrook, CA
- Oceanside vs New York, NY
- Oceanside vs Los Angeles, CA
- Oceanside vs Chicago, IL
- Oceanside vs Houston, TX
- Oceanside vs Phoenix, AZ
- Oceanside vs Philadelphia, PA
San Marcos vs another city
- San Marcos vs Escondido, CA
- San Marcos vs Vista, CA
- San Marcos vs Carlsbad, CA
- San Marcos vs Encinitas, CA
- San Marcos vs Solana Beach, CA
- San Marcos vs New York, NY
- San Marcos vs Los Angeles, CA
- San Marcos vs Chicago, IL
- San Marcos vs Houston, TX
- San Marcos vs Phoenix, AZ
- San Marcos vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).