Rio Dell Weather Forecast
- 50
- 66
Mostly Cloudy
- 50
- 64
Partly Sunny
- 51
- 66
Partly Sunny
- 52
- 69
Partly Sunny
- 54
- 74
Partly Sunny
- 54
- 74
Partly Sunny
Today 12 Sep Northern Coastal Humboldt
Mostly cloudy then becoming mostly sunny early in the afternoon then becoming mostly cloudy. Patchy fog in the morning. Highs 61 to 71. Southeast wind around 5 Mph shifting to the west in the afternoon.
Tonight 12 Sep Northern Coastal Humboldt
Mostly cloudy. Chance of rain Showers in the evening. Slight chance of rain Showers overnight. Lows 45 to 55. Southwest wind around 10 Mph shifting to the southeast overnight.
Rio Dell Temperature Statistics
September Temperature
Fortuna Rohnerville Airport (3.7 miles)
Lowest 4 September, 2026
46.4 °FAverage September
58.9 °FHighest 9 September, 2026
82.4 °F
Climate (2021–2026)
Fortuna Rohnerville Airport (3.7 miles)
Average Low 2021–2026
45.4 °FAverage 2021–2026
51.4 °FAverage High 2021–2026
59.8 °F