Monthly outlook for Treharne, OR: average high 48.2°, average low 40.6°. That is 0.4° above the climate normal for November. Precipitation is expected on 13 days (about 4.8 inches), against a normal of 10 days and 4.4 inches. The warmest day looks like 14 November (54.4°), the coolest 20 November (34.2°).
48.2°/40.6°
Average high / low
+0.4°
Above normal
13 / 10
Wet days / normal
4.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 November – 23 November
48.9°
48.3°
+0.3°
24 November – 3 December
47°
45.8°
+0.7°
4 December – 13 December
at normal
44.3°
—
November records over 66 years
68.4°4 November 1980All-time high
6.3°30 November 1985All-time low
Climate normals and records are computed from the nearest reference point — Vernonia (2 mi).
Sun, 1552° / 45°0.22
52 °
Treharne, Sunday, 15 November
Rain. High 52°, low 45°.
Pressure29.88 inHg
Wind6.9 mph S
Humidity88%
Visibility3.0 mi
Dew point46°
Mon, 1649° / 39°0.06
49 °
Treharne, Monday, 16 November
Light rain. High 49°, low 39°.
Pressure30.09 inHg
Wind4.6 mph S
Humidity84%
Visibility5.9 mi
Dew point43°
Tue, 1748° / 40°0
48 °
Treharne, Tuesday, 17 November
Overcast. High 48°, low 40°.
Pressure29.97 inHg
Wind9.2 mph SE
Humidity82%
Visibility6.2 mi
Dew point41°
Wed, 1848° / 39°0.08
48 °
Treharne, Wednesday, 18 November
Light rain. High 48°, low 39°.
Pressure29.88 inHg
Wind9.2 mph E
Humidity75%
Visibility6.2 mi
Dew point39°
Thu, 1952° / 36°0
52 °
Treharne, Thursday, 19 November
Clear. High 52°, low 36°.
Pressure29.97 inHg
Wind6.7 mph NE
Humidity70%
Visibility—
Dew point36°
Fri, 2050° / 34°0
50 °
Treharne, Friday, 20 November
Mostly clear. High 50°, low 34°.
Pressure29.94 inHg
Wind5.2 mph SE
Humidity73%
Visibility—
Dew point37°
Sat, 2145° / 42°0.46
45 °
Treharne, Saturday, 21 November
Rain. High 45°, low 42°.
Pressure30.00 inHg
Wind6.2 mph SE
Humidity96%
Visibility—
Dew point42°
Sun, 2247° / 42°0.14
47 °
Treharne, Sunday, 22 November
Light rain. High 47°, low 42°.
Pressure29.97 inHg
Wind4.9 mph SE
Humidity97%
Visibility—
Dew point43°
Mon, 2344° / 39°0.26
44 °
Treharne, Monday, 23 November
Light rain. High 44°, low 39°.
Pressure29.94 inHg
Wind7.2 mph SE
Humidity94%
Visibility—
Dew point40°
Tue, 2447° / 40°0.52
47 °
Treharne, Tuesday, 24 November
Rain. High 47°, low 40°.
Pressure29.53 inHg
Wind12.3 mph SE
Humidity97%
Visibility—
Dew point44°
Wed, 2548° / 41°0.42
48 °
Treharne, Wednesday, 25 November
Rain. High 48°, low 41°.
Pressure30.09 inHg
Wind10.6 mph S
Humidity88%
Visibility—
Dew point44°
Thu, 2649° / 38°0.32
49 °
Treharne, Thursday, 26 November
Rain. High 49°, low 38°.
Pressure30.30 inHg
Wind5.5 mph W
Humidity82%
Visibility—
Dew point42°
Fri, 2741° / 39°0.54
41 °
Treharne, Friday, 27 November
Rain. High 41°, low 39°.
Pressure29.83 inHg
Wind8.9 mph SE
Humidity96%
Visibility—
Dew point40°
Sat, 2846° / 41°0.99
46 °
Treharne, Saturday, 28 November
Rain. High 46°, low 41°.
Pressure29.65 inHg
Wind7.2 mph SE
Humidity99%
Visibility—
Dew point44°
Sun, 2951° / 47°0.43
51 °
Treharne, Sunday, 29 November
Rain. High 51°, low 47°.
Pressure29.74 inHg
Wind8.4 mph SE
Humidity94%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 3045° / 36°0.32
45 °
Treharne, Monday, 30 November
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.32 in
Chance of precipitation62%
Record high58° (2008)
Record low6° (1985)
Tue, 0145° / 37°0.3
45 °
Treharne, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high45°
Average low37°
Average precipitation0.3 in
Chance of precipitation65%
Record high57° (2021)
Record low19° (1985)
Wed, 0246° / 37°0.38
46 °
Treharne, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.38 in
Chance of precipitation65%
Record high54° (1975)
Record low20° (1985)
Thu, 0346° / 36°0.33
46 °
Treharne, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high46°
Average low36°
Average precipitation0.33 in
Chance of precipitation55%
Record high56° (1979)
Record low24° (1992)
Fri, 0445° / 35°0.31
45 °
Treharne, Friday, 4 December
Climate normal for this date — 60-year average.
Average high45°
Average low35°
Average precipitation0.31 in
Chance of precipitation57%
Record high56° (2023)
Record low21° (1992)
Sat, 0544° / 35°0.25
44 °
Treharne, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.25 in
Chance of precipitation50%
Record high56° (2023)
Record low18° (1992)
Sun, 0644° / 35°0.29
44 °
Treharne, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.29 in
Chance of precipitation58%
Record high53° (2023)
Record low15° (1972)
Mon, 0743° / 35°0.24
43 °
Treharne, Monday, 7 December
Climate normal for this date — 60-year average.
Average high43°
Average low35°
Average precipitation0.24 in
Chance of precipitation50%
Record high55° (1962)
Record low10° (1972)
Tue, 0844° / 35°0.26
44 °
Treharne, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.26 in
Chance of precipitation52%
Record high57° (1979)
Record low3° (1972)
Wed, 0944° / 35°0.32
44 °
Treharne, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.32 in
Chance of precipitation62%
Record high56° (2014)
Record low3° (1972)
Thu, 1045° / 36°0.35
45 °
Treharne, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.35 in
Chance of precipitation65%
Record high56° (2025)
Record low7° (1972)
Fri, 1145° / 36°0.35
45 °
Treharne, Friday, 11 December
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.35 in
Chance of precipitation72%
Record high56° (2025)
Record low14° (1972)
Sat, 1244° / 36°0.3
44 °
Treharne, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high44°
Average low36°
Average precipitation0.3 in
Chance of precipitation63%
Record high57° (1988)
Record low24° (1972)
Sun, 1344° / 35°0.31
44 °
Treharne, Sunday, 13 December
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.31 in
Chance of precipitation60%
Record high58° (2025)
Record low1° (1972)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Treharne, OR are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Treharne, OR since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.