Monthly outlook for Shannon, OR: average high 60.7°, average low 40.7°. That is 0.1° above the climate normal for October. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 7 days and 3.7 inches. The warmest day looks like 21 October (74°), the coolest 31 October (32.2°).
60.7°/40.7°
Average high / low
+0.1°
Above normal
3 / 7
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
62.9°
61.6°
+0.7°
28 October – 6 November
57°
58.2°
-0.7°
7 November – 16 November
at normal
55.5°
—
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).
Mon, 1961° / 43°0
61 °
Shannon, Monday, 19 October
Partly cloudy. High 61°, low 43°.
Pressure29.97 inHg
Wind0.3 mph SE
Humidity57%
Visibility6.2 mi
Dew point42°
Tue, 2071° / 49°0
71 °
Shannon, Tuesday, 20 October
Partly cloudy. High 71°, low 49°.
Pressure29.94 inHg
Wind3.3 mph NE
Humidity47%
Visibility6.2 mi
Dew point43°
Wed, 2174° / 46°0
74 °
Shannon, Wednesday, 21 October
Clear. High 74°, low 46°.
Pressure29.91 inHg
Wind0.1 mph N
Humidity37%
Visibility6.2 mi
Dew point40°
Thu, 2258° / 45°0.01
58 °
Shannon, Thursday, 22 October
Light rain. High 58°, low 45°.
Pressure30.00 inHg
Wind11.5 mph NW
Humidity64%
Visibility—
Dew point45°
Fri, 2358° / 41°0
58 °
Shannon, Friday, 23 October
Mostly clear. High 58°, low 41°.
Pressure30.39 inHg
Wind6.6 mph NW
Humidity53%
Visibility—
Dew point37°
Sat, 2463° / 36°0
63 °
Shannon, Saturday, 24 October
Partly cloudy. High 63°, low 36°.
Pressure30.30 inHg
Wind5.3 mph NE
Humidity48%
Visibility—
Dew point32°
Sun, 2561° / 41°0
61 °
Shannon, Sunday, 25 October
Overcast. High 61°, low 41°.
Pressure30.18 inHg
Wind6.8 mph NW
Humidity46%
Visibility—
Dew point36°
Mon, 2660° / 38°0
60 °
Shannon, Monday, 26 October
Mostly clear. High 60°, low 38°.
Pressure30.03 inHg
Wind4.3 mph N
Humidity58%
Visibility—
Dew point37°
Tue, 2761° / 36°0
61 °
Shannon, Tuesday, 27 October
Clear. High 61°, low 36°.
Pressure30.06 inHg
Wind2.8 mph NW
Humidity58%
Visibility—
Dew point36°
Wed, 2859° / 37°0
59 °
Shannon, Wednesday, 28 October
Clear. High 59°, low 37°.
Pressure30.09 inHg
Wind6.7 mph NW
Humidity53%
Visibility—
Dew point35°
Thu, 2956° / 39°0.06
56 °
Shannon, Thursday, 29 October
Light rain. High 56°, low 39°.
Pressure30.09 inHg
Wind7.3 mph NW
Humidity81%
Visibility—
Dew point44°
Fri, 3057° / 35°0
57 °
Shannon, Friday, 30 October
Clear. High 57°, low 35°.
Pressure30.24 inHg
Wind5.3 mph NE
Humidity63%
Visibility—
Dew point35°
Sat, 3160° / 32°0
60 °
Shannon, Saturday, 31 October
Overcast. High 60°, low 32°.
Pressure30.06 inHg
Wind4.5 mph E
Humidity44%
Visibility—
Dew point26°
Sun, 0149° / 42°0.61
49 °
Shannon, Sunday, 1 November
Rain. High 49°, low 42°.
Pressure29.74 inHg
Wind4.7 mph S
Humidity52%
Visibility—
Dew point31°
Mon, 0261° / 51°0.52
61 °
Shannon, Monday, 2 November
Rain. High 61°, low 51°.
Pressure29.77 inHg
Wind16.1 mph SW
Humidity89%
Visibility—
Dew point53°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0359° / 47°0.22
59 °
Shannon, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high59°
Average low47°
Average precipitation0.22 in
Chance of precipitation45%
Record high72° (1976)
Record low34° (1973)
Wed, 0458° / 47°0.37
58 °
Shannon, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high58°
Average low47°
Average precipitation0.37 in
Chance of precipitation63%
Record high70° (1976)
Record low37° (2011)
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)
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.