The Arboretum Weather Forecast
- 66
- 95
Mostly Cloudy
- 68
- 99
Hot
- 68
- 98
Hot
- 67
- 96
Mostly Sunny
- 67
- 95
Mostly Sunny
- 66
- 94
Mostly Sunny
Today 18 Aug Los Angeles County San Gabriel Valley
Partly cloudy. Highs 92 to 100.
Tonight 18 Aug Los Angeles County San Gabriel Valley
Mostly cloudy in the evening then partly cloudy. Lows in the mid 60s.
The Arboretum Temperature Statistics
August Temperature
El Monte (4.3 miles)
Lowest 4 August, 2026
69.8 °FAverage August
83.9 °FHighest 1 August, 2026
96.8 °F
Climate (2021–2026)
El Monte (4.3 miles)
Average Low 2021–2026
59.8 °FAverage 2021–2026
70.6 °FAverage High 2021–2026
77.2 °F