Climate averages 1991–2020
San Marcos weather
in June.
A warm, very dry month: the 5th warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
June is a warm month in San Marcos: daytime highs average 23.2°C and nights cool to about 14.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 2.5 mm of rain on fewer than one day, which makes June a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 18 min on an average June day.
The nearest other city in this atlas is Escondido (8 km away). In June its highs average 25.2°C, 2.0°C warmer than San Marcos, with 3.0 mm of rain.
Among the 498 cities listed in the United States, San Marcos ranks joint 454th of 498 for the warmest June highs and joint 64th of 498 for the driest June (rainfall, lowest first). The mean June high of those 498 cities is 27.9°C; San Marcos is 4.7°C cooler than that mean.
From June to July, average highs rise by 2.6°C to 25.8°C, and monthly rainfall falls from 2.5 mm to 2.0 mm.
The annual picture
June in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
San Marcos climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 16.8°C6.1°C | 6.1°C | 73 | 5.8 | 10.210 h |
| February | 16.7°C6.9°C | 6.9°C | 92 | 6.8 | 11.011 h |
| March | 17.6°C8.5°C | 8.5°C | 57 | 6.2 | 12.012 h |
| April | 19.1°C10.3°C | 10.3°C | 28 | 4.1 | 13.013 h |
| May | 20.7°C12.7°C | 12.7°C | 13 | 2.1 | 13.814 h |
| June, selected | 23.2°C14.8°C | 14.8°C | 2.5 | 0.5 | 14.314 h |
| July | 25.8°C17.2°C | 17.2°C | 2.0 | 0.4 | 14.114 h |
| August | 26.9°C18.2°C | 18.2°C | 1.0 | 0.2 | 13.413 h |
| September | 26.2°C17.3°C | 17.3°C | 3.9 | 0.7 | 12.412 h |
| October | 23.3°C13.7°C | 13.7°C | 17 | 2.6 | 11.411 h |
| November | 20.0°C9.4°C | 9.4°C | 28 | 3.5 | 10.510 h |
| December | 16.7°C6.2°C | 6.2°C | 54 | 5.1 | 10.010 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
June in nearby cities
- Escondido in JuneUnited States · 8 kmHigh 25.2°C · Low 15.1°C · 3.0 mm rain
- Vista in JuneUnited States · 10 kmHigh 24.9°C · Low 15.6°C · 2.5 mm rain
- Oceanside in JuneUnited States · 21 kmHigh 22.1°C · Low 15.7°C · 1.7 mm rain
- Temecula in JuneUnited States · 39 kmHigh 28.7°C · Low 15.1°C · 2.4 mm rain
- El Cajon in JuneUnited States · 43 kmHigh 24.5°C · Low 15.1°C · 1.8 mm rain
- Murrieta in JuneUnited States · 46 kmHigh 28.8°C · Low 15.8°C · 2.4 mm rain
- San Diego in JuneUnited States · 48 kmHigh 22.0°C · Low 14.9°C · 1.2 mm rain
- Chula Vista in JuneUnited States · 56 kmHigh 21.2°C · Low 15.0°C · 1.8 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for San Marcos) is explained once on the San Marcos year overview and on the Sources, method and limits page.
Vista lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.