Columbia River - Trojan Nuclear Plant Weather Forecast
- 39
- 46
Rain/Snow
- 39
- 46
Rain Showers
- 39
- 46
Rain Showers
- 40
- 47
Rain
- 37
- 47
Chance Rain
- 35
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Chance Rain
Today 19 Dec Lower Columbia River
Rain Showers this Morning, then rain Showers likely with a slight chance of Thunderstorms this afternoon. Some Thunderstorms may produce heavy rainfall this afternoon. Highs in the upper 40s. Southwest wind 5 to 10 Mph. Chance of rain 90 percent. Rainfall Amounts a tenth to a quarter of an Inch, except higher Amounts possible in Thunderstorms.
Tonight 19 Dec Lower Columbia River
Rain Showers likely with a slight chance of Thunderstorms in the Evening, then rain Showers after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Lows in the upper 30s. South wind 5 to 10 Mph. Chance of rain near 100 percent. Rainfall Amounts a tenth to a quarter of an Inch, except higher Amounts possible in Thunderstorms.
Columbia River - Trojan Nuclear Plant Temperature Statistics
December Temperature
Southwest Washington Regional Airport (5 miles)
Lowest 1 December, 2025
35.1 °FAverage December
49.6 °FHighest 15 December, 2025
60.1 °F
Climate (2020–Present)
Southwest Washington Regional Airport (5 miles)
Average Low 2020–2025
45.1 °FAverage 2020–2025
53 °FAverage High 2020–2025
62.4 °F