Monthly outlook for Tiernan, OR: average high 53.9°, average low 44.1°. That is 0.2° above the climate normal for November. Precipitation is expected on 11 days (about 9.6 inches), against a normal of 9 days and 5.5 inches. The warmest day looks like 11 November (63.2°), the coolest 21 November (32.2°).
53.9°/44.1°
Average high / low
+0.2°
Above normal
11 / 9
Wet days / normal
9.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 November – 20 November
53.7°
54.6°
-0.5°
21 November – 30 November
54.2°
51.5°
+1.5°
1 December – 10 December
at normal
50.4°
—
November records over 66 years
72.7°1 November 1962All-time high
27.1°24 November 1985All-time low
Climate normals and records are computed from the nearest reference point — Mapleton (4 mi).
Thu, 1258° / 48°0
58 °
Tiernan, Thursday, 12 November
Overcast. High 58°, low 48°.
Pressure29.68 inHg
Wind7.2 mph SW
Humidity78%
Visibility4.4 mi
Dew point52°
Fri, 1357° / 48°1.1
57 °
Tiernan, Friday, 13 November
Heavy rain. High 57°, low 48°.
Pressure29.26 inHg
Wind11.7 mph S
Humidity85%
Visibility4.1 mi
Dew point50°
Sat, 1457° / 47°1.09
57 °
Tiernan, Saturday, 14 November
Heavy rain. High 57°, low 47°.
Pressure29.74 inHg
Wind13.4 mph SW
Humidity81%
Visibility5.3 mi
Dew point48°
Sun, 1555° / 47°0.9
55 °
Tiernan, Sunday, 15 November
Rain. High 55°, low 47°.
Pressure29.80 inHg
Wind13.2 mph S
Humidity95%
Visibility—
Dew point50°
Mon, 1650° / 41°0.13
50 °
Tiernan, Monday, 16 November
Light rain. High 50°, low 41°.
Pressure30.03 inHg
Wind7.4 mph SW
Humidity85%
Visibility—
Dew point45°
Tue, 1753° / 38°0
53 °
Tiernan, Tuesday, 17 November
Light rain. High 53°, low 38°.
Pressure29.94 inHg
Wind7.1 mph SE
Humidity57%
Visibility—
Dew point36°
Wed, 1850° / 40°1.5
50 °
Tiernan, Wednesday, 18 November
Heavy rain. High 50°, low 40°.
Pressure29.56 inHg
Wind12.9 mph S
Humidity93%
Visibility—
Dew point43°
Thu, 1944° / 39°1.03
44 °
Tiernan, Thursday, 19 November
Rain. High 44°, low 39°.
Pressure30.06 inHg
Wind9.4 mph SW
Humidity93%
Visibility—
Dew point41°
Fri, 2050° / 36°0.02
50 °
Tiernan, Friday, 20 November
Light rain. High 50°, low 36°.
Pressure30.30 inHg
Wind5.8 mph E
Humidity68%
Visibility—
Dew point38°
Sat, 2152° / 32°0
52 °
Tiernan, Saturday, 21 November
Overcast. High 52°, low 32°.
Pressure30.09 inHg
Wind6.9 mph E
Humidity46%
Visibility—
Dew point29°
Sun, 2245° / 41°0.28
45 °
Tiernan, Sunday, 22 November
Light rain. High 45°, low 41°.
Pressure30.03 inHg
Wind5.6 mph E
Humidity94%
Visibility—
Dew point41°
Mon, 2356° / 46°1.46
56 °
Tiernan, Monday, 23 November
Heavy rain. High 56°, low 46°.
Pressure29.85 inHg
Wind13 mph S
Humidity98%
Visibility—
Dew point48°
Tue, 2456° / 50°0.42
56 °
Tiernan, Tuesday, 24 November
Light rain. High 56°, low 50°.
Pressure30.15 inHg
Wind15.6 mph S
Humidity95%
Visibility—
Dew point55°
Wed, 2560° / 48°1
60 °
Tiernan, Wednesday, 25 November
Rain. High 60°, low 48°.
Pressure29.94 inHg
Wind14.1 mph SW
Humidity83%
Visibility—
Dew point53°
Thu, 2657° / 55°0.62
57 °
Tiernan, Thursday, 26 November
Rain. High 57°, low 55°.
Pressure30.06 inHg
Wind11 mph SW
Humidity98%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2751° / 41°0.35
51 °
Tiernan, Friday, 27 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.35 in
Chance of precipitation65%
Record high59° (2002)
Record low31° (1985)
Sat, 2851° / 41°0.27
51 °
Tiernan, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.27 in
Chance of precipitation52%
Record high62° (2002)
Record low29° (2023)
Sun, 2951° / 41°0.3
51 °
Tiernan, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.3 in
Chance of precipitation52%
Record high61° (1999)
Record low29° (2019)
Mon, 3050° / 41°0.4
50 °
Tiernan, Monday, 30 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.4 in
Chance of precipitation65%
Record high63° (2008)
Record low29° (1985)
Tue, 0151° / 41°0.4
51 °
Tiernan, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.4 in
Chance of precipitation58%
Record high64° (2021)
Record low32° (2024)
Wed, 0251° / 42°0.49
51 °
Tiernan, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.49 in
Chance of precipitation67%
Record high59° (1965)
Record low29° (2024)
Thu, 0351° / 41°0.41
51 °
Tiernan, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.41 in
Chance of precipitation52%
Record high62° (1979)
Record low31° (1994)
Fri, 0451° / 41°0.4
51 °
Tiernan, Friday, 4 December
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.4 in
Chance of precipitation57%
Record high59° (2023)
Record low29° (1972)
Sat, 0551° / 40°0.36
51 °
Tiernan, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.36 in
Chance of precipitation60%
Record high61° (2014)
Record low27° (2013)
Sun, 0651° / 41°0.41
51 °
Tiernan, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.41 in
Chance of precipitation65%
Record high59° (2024)
Record low26° (1972)
Mon, 0749° / 40°0.33
49 °
Tiernan, Monday, 7 December
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.33 in
Chance of precipitation52%
Record high61° (1962)
Record low11° (1972)
Tue, 0850° / 40°0.3
50 °
Tiernan, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.3 in
Chance of precipitation53%
Record high61° (2020)
Record low6° (1972)
Wed, 0950° / 40°0.34
50 °
Tiernan, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.34 in
Chance of precipitation62%
Record high60° (2014)
Record low9° (1972)
Thu, 1050° / 41°0.43
50 °
Tiernan, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.43 in
Chance of precipitation62%
Record high61° (2014)
Record low9° (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 Tiernan, 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 Tiernan, 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.