Copalis River Mouth Weather Forecast
- 58
- 63
Rain
- 52
- 61
Chance Rain
- 55
- 62
Mostly Sunny
- 57
- 70
Mostly Sunny
- 54
- 60
Chance Rain
- 51
- 59
Slight Chance Rain
- 53
- 61
Partly Sunny
Today 13 Sep Grays Harbor County Coast
Mostly cloudy. Areas of fog in the Morning, then patchy fog late in the morning. Highs in the mid 60s to lower 70s. Light wind becoming south to 10 Mph in the afternoon.
Tonight 13 Sep Grays Harbor County Coast
Patchy fog. A slight chance of rain in the evening. Showers and a slight chance of Thunderstorms in the late evening and early Morning, then rain likely late in the night. Rainfall Amounts a half inch to one inch Possible, except higher Amounts possible in Thunderstorms. Lows in the mid to upper 50s. South wind to 10 Mph. Gusts to 20 Mph after midnight.
Copalis River Mouth Temperature Statistics
September Temperature
Hoquiam, Bowerman Airport (16.8 miles)
Lowest 2 September, 2025
53.1 °FAverage September
59.9 °FHighest 2 September, 2025
73 °F
Climate (2020–Present)
Hoquiam, Bowerman Airport (16.8 miles)
Average Low 2020–2025
46.2 °FAverage 2020–2025
52.1 °FAverage High 2020–2025
58.3 °F