Forest Grove Weather Forecast
- 39
- 56
Rain
- 38
- 47
Rain
- 39
- 47
Rain
- 39
- 46
Rain
- 38
- 47
Rain Likely
- 36
- 46
Chance Rain
Today 18 Dec Tualatin Valley
Rain. Highs in the upper 50s. Southeast wind 10 to 15 Mph, becoming southwest 15 to 20 Mph with Gusts up to 35 Mph in the afternoon. Chance of rain near 100 percent. Rainfall Amounts one inch to two Inches.
Tonight 18 Dec Tualatin Valley
Rain. Lows in the upper 30s. West wind 10 to 15 Mph with Gusts up to 35 Mph, easing to light after midnight. Chance of rain near 100 percent. Rainfall Amounts a half of an inch to one inch.
Forest Grove Temperature Statistics
December Temperature
Portland-Hillsboro Airport (7.5 miles)
Lowest 1 December, 2025
30 °FAverage December
49 °FHighest 15 December, 2025
63 °F
Climate (2020–Present)
Portland-Hillsboro Airport (7.5 miles)
Average Low 2020–2025
43.4 °FAverage 2020–2025
53.7 °FAverage High 2020–2025
64.4 °F