Monthly outlook for Treharne, OR: average high 51.6°, average low 42.3°. That is 1.1° below the climate normal for October. Precipitation is expected on 12 days (about 5.0 inches), against a normal of 9 days and 3.8 inches. The warmest day looks like 9 November (56°), the coolest 30 October (34.1°).
51.6°/42.3°
Average high / low
−1.1°
Below normal
12 / 9
Wet days / normal
5.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
51.3°
54.5°
-1.8°
4 November – 13 November
52°
51.8°
+0.1°
14 November – 23 November
at normal
48.3°
—
October records over 66 years
88.5°1 October 1987All-time high
27.3°28 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Vernonia (2 mi).
Mon, 2655° / 41°0.17
55 °
Treharne, Monday, 26 October
Rain. High 55°, low 41°.
Pressure30.03 inHg
Wind6.2 mph SE
Humidity93%
Visibility5.6 mi
Dew point47°
Tue, 2752° / 44°0.11
52 °
Treharne, Tuesday, 27 October
Rain. High 52°, low 44°.
Pressure30.09 inHg
Wind7 mph W
Humidity89%
Visibility6.2 mi
Dew point47°
Wed, 2850° / 39°0.18
50 °
Treharne, Wednesday, 28 October
Light rain. High 50°, low 39°.
Pressure30.06 inHg
Wind8.5 mph SW
Humidity83%
Visibility4.8 mi
Dew point44°
Thu, 2949° / 38°0.37
49 °
Treharne, Thursday, 29 October
Rain. High 49°, low 38°.
Pressure30.00 inHg
Wind7.4 mph S
Humidity89%
Visibility—
Dew point41°
Fri, 3049° / 34°0
49 °
Treharne, Friday, 30 October
Overcast. High 49°, low 34°.
Pressure29.94 inHg
Wind6.3 mph SE
Humidity90%
Visibility—
Dew point40°
Sat, 3154° / 36°0
54 °
Treharne, Saturday, 31 October
Overcast. High 54°, low 36°.
Pressure30.00 inHg
Wind3.6 mph SE
Humidity71%
Visibility—
Dew point38°
Sun, 0154° / 36°0
54 °
Treharne, Sunday, 1 November
Overcast. High 54°, low 36°.
Pressure29.80 inHg
Wind5.1 mph N
Humidity64%
Visibility—
Dew point35°
Mon, 0252° / 37°0.01
52 °
Treharne, Monday, 2 November
Light rain. High 52°, low 37°.
Pressure30.15 inHg
Wind7.8 mph SE
Humidity84%
Visibility—
Dew point40°
Tue, 0347° / 45°0.48
47 °
Treharne, Tuesday, 3 November
Rain. High 47°, low 45°.
Pressure30.15 inHg
Wind5.1 mph SE
Humidity91%
Visibility—
Dew point43°
Wed, 0450° / 46°0.22
50 °
Treharne, Wednesday, 4 November
Light rain. High 50°, low 46°.
Pressure29.80 inHg
Wind7.9 mph SE
Humidity96%
Visibility—
Dew point48°
Thu, 0550° / 46°0.91
50 °
Treharne, Thursday, 5 November
Rain. High 50°, low 46°.
Pressure29.50 inHg
Wind6.6 mph SE
Humidity99%
Visibility—
Dew point48°
Fri, 0650° / 47°0.34
50 °
Treharne, Friday, 6 November
Light rain. High 50°, low 47°.
Pressure29.32 inHg
Wind11.3 mph SE
Humidity90%
Visibility—
Dew point47°
Sat, 0755° / 47°0.15
55 °
Treharne, Saturday, 7 November
Light rain. High 55°, low 47°.
Pressure29.83 inHg
Wind6.6 mph SE
Humidity93%
Visibility—
Dew point49°
Sun, 0851° / 49°1.21
51 °
Treharne, Sunday, 8 November
Rain. High 51°, low 49°.
Pressure29.80 inHg
Wind4.5 mph SE
Humidity99%
Visibility—
Dew point50°
Mon, 0956° / 47°0.39
56 °
Treharne, Monday, 9 November
Rain. High 56°, low 47°.
Pressure29.74 inHg
Wind9.7 mph W
Humidity90%
Visibility—
Dew point53°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1051° / 40°0.2
51 °
Treharne, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.2 in
Chance of precipitation50%
Record high65° (2016)
Record low29° (1978)
Wed, 1152° / 41°0.26
52 °
Treharne, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.26 in
Chance of precipitation63%
Record high62° (1990)
Record low27° (1978)
Thu, 1251° / 41°0.25
51 °
Treharne, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.25 in
Chance of precipitation62%
Record high62° (1974)
Record low28° (1985)
Fri, 1351° / 41°0.31
51 °
Treharne, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.31 in
Chance of precipitation62%
Record high63° (1969)
Record low26° (1985)
Sat, 1451° / 40°0.23
51 °
Treharne, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.23 in
Chance of precipitation43%
Record high65° (1999)
Record low26° (1978)
Sun, 1550° / 40°0.26
50 °
Treharne, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.26 in
Chance of precipitation60%
Record high60° (2008)
Record low26° (2014)
Mon, 1649° / 40°0.22
49 °
Treharne, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.22 in
Chance of precipitation73%
Record high61° (1976)
Record low27° (2014)
Tue, 1749° / 39°0.28
49 °
Treharne, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.28 in
Chance of precipitation70%
Record high61° (2008)
Record low28° (1961)
Wed, 1848° / 39°0.18
48 °
Treharne, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.18 in
Chance of precipitation57%
Record high59° (1989)
Record low26° (1985)
Thu, 1948° / 39°0.41
48 °
Treharne, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.41 in
Chance of precipitation65%
Record high58° (1968)
Record low28° (1977)
Fri, 2048° / 38°0.3
48 °
Treharne, Friday, 20 November
Climate normal for this date — 60-year average.
Average high48°
Average low38°
Average precipitation0.3 in
Chance of precipitation58%
Record high63° (2002)
Record low26° (1978)
Sat, 2147° / 37°0.29
47 °
Treharne, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.29 in
Chance of precipitation58%
Record high59° (2002)
Record low18° (1978)
Sun, 2246° / 36°0.31
46 °
Treharne, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high46°
Average low36°
Average precipitation0.31 in
Chance of precipitation60%
Record high61° (2017)
Record low14° (1985)
Mon, 2346° / 37°0.31
46 °
Treharne, Monday, 23 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.31 in
Chance of precipitation67%
Record high59° (2017)
Record low8° (1985)
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.