Tuesday, July 21, 2026 · Hour-by-hour forecast updated 6:26 AM PDT
68°F and partly cloudy at peak. Wind 1 mph from the E, dew point 64°F.
FitCast texts you tomorrow's hour-by-hour forecast every evening so you know exactly what to expect before your alarm goes off.
Based on today's FitScore analysis, the best time to run is 5 AM with a peak FitScore of 68/100. Check the hourly breakdown above for detailed conditions throughout the day.
The best months for running in San Diego are Year-round (seriously). The most challenging months are typically None — occasional Santa Ana winds in fall. Marine layer keeps mornings cool. Coastal runs are 10°F cooler than inland.
FitScore rates each hour from 0–100 for outdoor exercise based on temperature, humidity, dew point, wind, precipitation probability, UV index, and air quality. Higher scores mean better conditions.