The temperatures in Lake Arrowhead in August are comfortable with low of 16°C and and high up to 26°C.
You can expect rain for roughly half of the month of August in Lake Arrowhead. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Lake Arrowhead in August 2025.
If you’re planning to visit Lake Arrowhead in the near future, we highly recommend that you review the 14 day weather forecast for Lake Arrowhead before you arrive.
Temperatures
26° / 16°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
99
mm
Sun Hours
7.5
Hrs
