San Dimas, CA Weather Tomorrow

Tomorrow's forecast for San Dimas includes an extended 5 day weather outlook with precipitation potential, daytime and nighttime forecasts, temperature highs and lows in Fahrenheit and Celsius, sunrise and sunset times, cloud cover, wind chill, wind speed, and wind direction for the San Dimas area and around Los Angeles county, California.
Updated: Sun Oct 18th 2026 12:45 PM PDT
San Dimas, CA Weather – 10-18 – Sunny
86° / 72°
Sunny
Highs will reach 86°F with lows near 72°F in San Dimas, where sunshine is. Wind will be moderate, blowing around 11mph on average and gusts of 20.4mph at 4 PM. The air will be relatively dry with average humidity levels below 30%, the maximum being 37% at 11 PM and 15% being its lowest at 2 PM. Barometric pressure is its highest of 29.94inHg at 10 PM, a lowest point of 29.89inHg at 3 PM with an avg 29.91inHg.
San Dimas, CA Weather – 10-19 – Sunny
84° / 71°

Weather Tomorrow

Sunny
San Dimas is set for a sunny day with temperatures peaking at 84°F and dipping to 71°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 10mph and gusts of 20.8mph at 3 PM. Humidity levels should be comfortable, sitting around 36% on average, the maximum being 50% at 11 PM and 26% being its lowest at 2 PM. Barometric pressure is its highest of 29.93inHg at 12 AM, a lowest point of 29.82inHg at 4 PM with an avg 29.88inHg.
San Dimas, CA Weather – 10-20 – Sunny
81° / 68°
Sunny
Highs will reach 81°F with lows near 68°F in San Dimas, where sunshine is. There's a very small chance of rainfall, only about 2%. Wind will be moderate, blowing around 12mph on average and gusts of 22.4mph at 5 PM. Humidity levels should be comfortable, sitting around 51% on average, the maximum being 66% at 7 AM and 31% being its lowest at 2 PM. Barometric pressure is its highest of 29.89inHg at 11 PM, a lowest point of 29.8inHg at 4 PM with an avg 29.85inHg.
San Dimas, CA Weather – 10-21 – Sunny
79° / 62°
Sunny
Bright and sunny conditions in San Dimas, with a high of 79°F and a low of 62°F. Rainfall predicted to have a 65% chance with an estimated 0.56in. Wind will be moderate, blowing around 17mph on average and gusts of 27.1mph at 5 PM. The humidity will be on the higher side, averaging about 61%, the maximum being 86% at 10 PM and 28% being its lowest at 2 PM. Barometric pressure is its highest of 29.92inHg at 9 AM, a lowest point of 29.8inHg at 3 PM with an avg 29.88inHg.
San Dimas, CA Weather – 10-22 – Scattered Showers
70° / 63°
Scattered Showers
Passing showers are in the forecast for San Dimas, with a high of 70°F and a low of 63°F. Rainfall predicted to have a 75% chance with an estimated 0.39in. Wind will be moderate, blowing around 12mph on average and gusts of 21.9mph at 3 PM. The humidity will be on the higher side, averaging about 62%, the maximum being 74% at 7 AM and 44% being its lowest at 3 PM. Barometric pressure is its highest of 29.96inHg at 11 PM, a lowest point of 29.86inHg at 4 AM with an avg 29.9inHg.
San Dimas, CA Weather – 10-23 – Scattered Showers
72° / 61°
Scattered Showers
In San Dimas, showers likely at times with highs near 72°F and lows around 61°F. There's a moderate 36% chance of rainfall with an estimated 0.03in. Winds will be light at 8mph and gusts of 17mph at 5 PM. Humidity levels should be comfortable, sitting around 59% on average, the maximum being 75% at 5 AM and 40% being its lowest at 5 PM. Barometric pressure is its highest of 30inHg at 8 AM, a lowest point of 29.91inHg at 5 PM with an avg 29.96inHg.

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