Monthly outlook for Shannon, OR: average high 64.7°, average low 43.3°. That is 2.7° above the climate normal for October. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 7 days and 3.9 inches. The warmest day looks like 21 October (72°), the coolest 24 October (39°).
64.7°/43.3°
Average high / low
+2.7°
Above normal
4 / 7
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
66.2°
60.6°
+3.1°
30 October – 8 November
62°
57.6°
+2.5°
9 November – 18 November
at normal
55.1°
—
October records over 66 years
93.9°2 October 1980All-time high
31.1°31 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Mapleton (13 mi).
Wed, 2172° / 43°0
72 °
Shannon, Wednesday, 21 October
Clear. High 72°, low 43°.
Pressure29.91 inHg
Wind0.4 mph NE
Humidity35%
Visibility6.2 mi
Dew point41°
Thu, 2265° / 45°0
65 °
Shannon, Thursday, 22 October
Overcast. High 65°, low 45°.
Pressure29.97 inHg
Wind4.4 mph NW
Humidity44%
Visibility6.2 mi
Dew point39°
Fri, 2360° / 41°0
60 °
Shannon, Friday, 23 October
Mostly clear. High 60°, low 41°.
Pressure30.33 inHg
Wind4.6 mph N
Humidity50%
Visibility6.2 mi
Dew point37°
Sat, 2464° / 39°0
64 °
Shannon, Saturday, 24 October
Overcast. High 64°, low 39°.
Pressure30.15 inHg
Wind4.4 mph E
Humidity54%
Visibility—
Dew point37°
Sun, 2568° / 42°0
68 °
Shannon, Sunday, 25 October
Overcast. High 68°, low 42°.
Pressure30.12 inHg
Wind3.8 mph E
Humidity49%
Visibility—
Dew point37°
Mon, 2664° / 42°0
64 °
Shannon, Monday, 26 October
Overcast. High 64°, low 42°.
Pressure30.09 inHg
Wind5 mph E
Humidity34%
Visibility—
Dew point25°
Tue, 2766° / 39°0
66 °
Shannon, Tuesday, 27 October
Overcast. High 66°, low 39°.
Pressure30.09 inHg
Wind6.1 mph E
Humidity31%
Visibility—
Dew point24°
Wed, 2869° / 40°0
69 °
Shannon, Wednesday, 28 October
Clear. High 69°, low 40°.
Pressure30.03 inHg
Wind3.6 mph NE
Humidity31%
Visibility—
Dew point26°
Thu, 2964° / 41°0
64 °
Shannon, Thursday, 29 October
Overcast. High 64°, low 41°.
Pressure29.91 inHg
Wind2.7 mph NE
Humidity44%
Visibility—
Dew point33°
Fri, 3061° / 42°0
61 °
Shannon, Friday, 30 October
Overcast. High 61°, low 42°.
Pressure29.80 inHg
Wind6.2 mph W
Humidity61%
Visibility—
Dew point40°
Sat, 3162° / 41°0.17
62 °
Shannon, Saturday, 31 October
Rain. High 62°, low 41°.
Pressure29.74 inHg
Wind5.8 mph E
Humidity65%
Visibility—
Dew point40°
Sun, 0162° / 49°0.26
62 °
Shannon, Sunday, 1 November
Rain. High 62°, low 49°.
Pressure30.00 inHg
Wind6.2 mph SW
Humidity82%
Visibility—
Dew point50°
Mon, 0263° / 47°0.06
63 °
Shannon, Monday, 2 November
Light rain. High 63°, low 47°.
Pressure30.06 inHg
Wind4.1 mph E
Humidity82%
Visibility—
Dew point49°
Tue, 0363° / 47°0.02
63 °
Shannon, Tuesday, 3 November
Light rain. High 63°, low 47°.
Pressure29.85 inHg
Wind4 mph E
Humidity67%
Visibility—
Dew point44°
Wed, 0460° / 52°0.09
60 °
Shannon, Wednesday, 4 November
Light rain. High 60°, low 52°.
Pressure29.68 inHg
Wind4.7 mph SW
Humidity83%
Visibility—
Dew point52°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0557° / 46°0.37
57 °
Shannon, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high57°
Average low46°
Average precipitation0.37 in
Chance of precipitation62%
Record high67° (1987)
Record low34° (1971)
Fri, 0657° / 47°0.31
57 °
Shannon, Friday, 6 November
Climate normal for this date — 60-year average.
Average high57°
Average low47°
Average precipitation0.31 in
Chance of precipitation67%
Record high67° (1999)
Record low36° (1971)
Sat, 0756° / 46°0.33
56 °
Shannon, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high56°
Average low46°
Average precipitation0.33 in
Chance of precipitation58%
Record high67° (1991)
Record low37° (2022)
Sun, 0855° / 44°0.3
55 °
Shannon, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.3 in
Chance of precipitation48%
Record high69° (1976)
Record low34° (2020)
Mon, 0955° / 45°0.3
55 °
Shannon, Monday, 9 November
Climate normal for this date — 60-year average.
Average high55°
Average low45°
Average precipitation0.3 in
Chance of precipitation52%
Record high68° (2025)
Record low29° (2022)
Tue, 1056° / 44°0.3
56 °
Shannon, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.3 in
Chance of precipitation48%
Record high66° (1996)
Record low31° (1985)
Wed, 1156° / 45°0.34
56 °
Shannon, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.34 in
Chance of precipitation58%
Record high66° (2019)
Record low30° (1985)
Thu, 1256° / 45°0.27
56 °
Shannon, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.27 in
Chance of precipitation57%
Record high69° (1967)
Record low29° (1985)
Fri, 1356° / 45°0.39
56 °
Shannon, Friday, 13 November
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.39 in
Chance of precipitation60%
Record high67° (2021)
Record low29° (1978)
Sat, 1456° / 44°0.23
56 °
Shannon, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.23 in
Chance of precipitation48%
Record high69° (1999)
Record low29° (1978)
Sun, 1555° / 45°0.35
55 °
Shannon, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high55°
Average low45°
Average precipitation0.35 in
Chance of precipitation53%
Record high64° (2025)
Record low32° (1978)
Mon, 1654° / 45°0.28
54 °
Shannon, Monday, 16 November
Climate normal for this date — 60-year average.
Average high54°
Average low45°
Average precipitation0.28 in
Chance of precipitation60%
Record high66° (2008)
Record low34° (2014)
Tue, 1754° / 44°0.37
54 °
Shannon, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.37 in
Chance of precipitation65%
Record high65° (2008)
Record low33° (2022)
Wed, 1853° / 43°0.28
53 °
Shannon, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.28 in
Chance of precipitation57%
Record high62° (1989)
Record low31° (1994)
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 Shannon, 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 Shannon, 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.