San Diego climate
United States
It helps to scan the year-round pattern for San Diego before zooming into one month.
First-time visitors often notice “tiring weather” before they label it as hot or cold in San Diego.
Climate facts
Dec · Jan · Feb · Mar
Avg low 9–12°C / high 18–20°C · Rainy days: 3–7 / ~25–70 mm (year-to-year variation)
Apr · May · Jun
Avg low 12–16°C / high 19–24°C · Rainy days: 0–3 / ~2–20 mm
Jul · Aug · Sep · Oct
Avg low 17–20°C / high 22–28°C (hotter inland) · Rainy days: 0–1 / ~0–8 mm
Nov
Avg low 11–14°C / high 19–22°C · Rainy days: 1–3 / ~5–25 mm
How it tends to feel for travel
For travel, what you remember is often variability (rain patterns, humidity, daily swings), not the average.
In hotter periods, day-versus-night fatigue accumulates differently, changing how the climate feels.
When it tends to fit
- • Once you see the year-round pattern, it’s easier to judge whether a month fits your style.
- • If you revisit the city, separating “seasonal itineraries” can save a lot of planning time.
When it may not fit
- • If you rely only on averages, you may be surprised by variability (squalls, wind, indoor AC).
- • In monsoon-like periods, the more your itinerary depends on outdoor walking, the higher the risk.
Outfit notes
This connects climate patterns to packing—without over-interpreting.
- • 🧭 Key idea: San Diego is mild overall, but coastal (cool/marine layer) vs inland (hotter) differences matter. Your itinerary location often decides what feels right.
- • 🌧️ Winter (Dec–Mar): rain can arrive in clusters. A light jacket + layers and a rain option are practical.
- • 🌫️ May–June: marine layer can bring cool, cloudy mornings—thin layers help even when afternoons are warm.
The same numbers can still feel different depending on how you travel.
Explore San Diego
These pages are connected so you can compare conditions and decide for yourself.