Monthly outlook for Trinity Alps, CA: average high 72.2°, average low 46°. That is 1.7° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 3 days and 1.6 inches. The warmest day looks like 15 October (80.4°), the coolest 29 October (34.5°).
72.2°/46°
Average high / low
+1.7°
Above normal
1 / 3
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
74.3°
71.2°
+1.7°
24 October – 2 November
68.8°
65.1°
+2.1°
3 November – 12 November
at normal
59.8°
—
October records over 66 years
97.7°2 October 1980All-time high
28°18 October 1984All-time low
Climate normals and records are computed from the nearest reference point — Lewiston (12 mi).
Thu, 1580° / 44°0
80 °
Trinity Alps, Thursday, 15 October
Clear. High 80°, low 44°.
Pressure30.27 inHg
Wind5.1 mph E
Humidity25%
Visibility6.2 mi
Dew point29°
Fri, 1680° / 59°0
80 °
Trinity Alps, Friday, 16 October
Clear. High 80°, low 59°.
Pressure30.18 inHg
Wind3.6 mph SE
Humidity19%
Visibility6.2 mi
Dew point15°
Sat, 1775° / 59°0
75 °
Trinity Alps, Saturday, 17 October
Overcast. High 75°, low 59°.
Pressure30.12 inHg
Wind4 mph S
Humidity23%
Visibility6.2 mi
Dew point20°
Sun, 1871° / 54°0
71 °
Trinity Alps, Sunday, 18 October
Clear. High 71°, low 54°.
Pressure30.00 inHg
Wind6.1 mph S
Humidity30%
Visibility—
Dew point33°
Mon, 1957° / 41°0
57 °
Trinity Alps, Monday, 19 October
Overcast. High 57°, low 41°.
Pressure29.91 inHg
Wind4.7 mph S
Humidity53%
Visibility—
Dew point36°
Tue, 2072° / 43°0
72 °
Trinity Alps, Tuesday, 20 October
Partly cloudy. High 72°, low 43°.
Pressure29.91 inHg
Wind5.4 mph SE
Humidity23%
Visibility—
Dew point24°
Wed, 2179° / 50°0
79 °
Trinity Alps, Wednesday, 21 October
Partly cloudy. High 79°, low 50°.
Pressure29.85 inHg
Wind6 mph SE
Humidity17%
Visibility—
Dew point24°
Thu, 2273° / 45°0
73 °
Trinity Alps, Thursday, 22 October
Partly cloudy. High 73°, low 45°.
Pressure29.91 inHg
Wind4.3 mph NW
Humidity28%
Visibility—
Dew point28°
Fri, 2377° / 45°0
77 °
Trinity Alps, Friday, 23 October
Clear. High 77°, low 45°.
Pressure30.00 inHg
Wind4.7 mph NW
Humidity24%
Visibility—
Dew point28°
Sat, 2480° / 48°0
80 °
Trinity Alps, Saturday, 24 October
Partly cloudy. High 80°, low 48°.
Pressure30.09 inHg
Wind4.9 mph NW
Humidity15%
Visibility—
Dew point19°
Sun, 2578° / 49°0
78 °
Trinity Alps, Sunday, 25 October
Partly cloudy. High 78°, low 49°.
Pressure30.03 inHg
Wind4 mph NW
Humidity13%
Visibility—
Dew point15°
Mon, 2669° / 42°0
69 °
Trinity Alps, Monday, 26 October
Mostly clear. High 69°, low 42°.
Pressure29.94 inHg
Wind5.5 mph NW
Humidity31%
Visibility—
Dew point30°
Tue, 2770° / 40°0
70 °
Trinity Alps, Tuesday, 27 October
Overcast. High 70°, low 40°.
Pressure29.91 inHg
Wind5.2 mph W
Humidity21%
Visibility—
Dew point18°
Wed, 2862° / 45°0.24
62 °
Trinity Alps, Wednesday, 28 October
Rain. High 62°, low 45°.
Pressure29.83 inHg
Wind7.5 mph SW
Humidity59%
Visibility—
Dew point43°
Thu, 2954° / 35°0
54 °
Trinity Alps, Thursday, 29 October
Overcast. High 54°, low 35°.
Pressure29.83 inHg
Wind6 mph SW
Humidity60%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3064° / 45°0.13
64 °
Trinity Alps, Friday, 30 October
Climate normal for this date — 60-year average.
Average high64°
Average low45°
Average precipitation0.13 in
Chance of precipitation32%
Record high83° (1966)
Record low35° (1996)
Sat, 3165° / 44°0.09
65 °
Trinity Alps, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high65°
Average low44°
Average precipitation0.09 in
Chance of precipitation22%
Record high84° (1966)
Record low33° (1971)
Sun, 0165° / 45°0.11
65 °
Trinity Alps, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high65°
Average low45°
Average precipitation0.11 in
Chance of precipitation23%
Record high84° (1966)
Record low35° (1971)
Mon, 0264° / 44°0.11
64 °
Trinity Alps, Monday, 2 November
Climate normal for this date — 60-year average.
Average high64°
Average low44°
Average precipitation0.11 in
Chance of precipitation23%
Record high81° (2020)
Record low35° (1990)
Tue, 0365° / 44°0.09
65 °
Trinity Alps, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high65°
Average low44°
Average precipitation0.09 in
Chance of precipitation20%
Record high82° (1966)
Record low32° (1994)
Wed, 0464° / 45°0.09
64 °
Trinity Alps, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high64°
Average low45°
Average precipitation0.09 in
Chance of precipitation23%
Record high81° (2019)
Record low35° (2011)
Thu, 0561° / 44°0.15
61 °
Trinity Alps, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high61°
Average low44°
Average precipitation0.15 in
Chance of precipitation33%
Record high81° (2012)
Record low30° (2017)
Fri, 0660° / 44°0.14
60 °
Trinity Alps, Friday, 6 November
Climate normal for this date — 60-year average.
Average high60°
Average low44°
Average precipitation0.14 in
Chance of precipitation40%
Record high78° (2019)
Record low33° (1971)
Sat, 0760° / 43°0.21
60 °
Trinity Alps, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high60°
Average low43°
Average precipitation0.21 in
Chance of precipitation37%
Record high79° (1991)
Record low32° (2021)
Sun, 0859° / 42°0.17
59 °
Trinity Alps, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high59°
Average low42°
Average precipitation0.17 in
Chance of precipitation30%
Record high78° (2019)
Record low25° (1994)
Mon, 0957° / 41°0.22
57 °
Trinity Alps, Monday, 9 November
Climate normal for this date — 60-year average.
Average high57°
Average low41°
Average precipitation0.22 in
Chance of precipitation40%
Record high77° (2019)
Record low28° (1998)
Tue, 1057° / 42°0.21
57 °
Trinity Alps, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.21 in
Chance of precipitation35%
Record high76° (2019)
Record low29° (1985)
Wed, 1158° / 41°0.21
58 °
Trinity Alps, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.21 in
Chance of precipitation33%
Record high79° (2019)
Record low19° (1985)
Thu, 1258° / 41°0.15
58 °
Trinity Alps, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high58°
Average low41°
Average precipitation0.15 in
Chance of precipitation32%
Record high73° (2019)
Record low23° (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 Trinity Alps, CA 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 Trinity Alps, CA 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.