Monthly outlook for Porthill, ID: average high 53.9°, average low 37.2°. That is 2.8° above the climate normal for October. Precipitation is expected on 5 days (about 0.9 inches), against a normal of 8 days and 2.2 inches. The warmest day looks like 22 October (64.7°), the coolest 26 October (30.6°).
53.9°/37.2°
Average high / low
+2.8°
Above normal
5 / 8
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
56.1°
50.4°
+3.2°
31 October – 9 November
50.2°
45.2°
+2.7°
10 November – 19 November
at normal
41.3°
—
October records over 66 years
84.7°1 October 1992All-time high
4.6°25 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Copeland (8 mi).
Thu, 2265° / 42°0.06
65 °
Porthill, Thursday, 22 October
Light rain. High 65°, low 42°.
Pressure29.91 inHg
Wind0.8 mph W
Humidity63%
Visibility3.7 mi
Dew point40°
Fri, 2356° / 42°0.01
56 °
Porthill, Friday, 23 October
Light rain. High 56°, low 42°.
Pressure29.94 inHg
Wind2.7 mph NW
Humidity55%
Visibility6.2 mi
Dew point40°
Sat, 2452° / 38°0.03
52 °
Porthill, Saturday, 24 October
Light rain. High 52°, low 38°.
Pressure30.21 inHg
Wind2.6 mph E
Humidity63%
Visibility6.2 mi
Dew point39°
Sun, 2552° / 33°0
52 °
Porthill, Sunday, 25 October
Clear. High 52°, low 33°.
Pressure30.27 inHg
Wind2.2 mph NE
Humidity54%
Visibility—
Dew point29°
Mon, 2647° / 31°0
47 °
Porthill, Monday, 26 October
Overcast. High 47°, low 31°.
Pressure30.39 inHg
Wind2.2 mph S
Humidity71%
Visibility—
Dew point29°
Tue, 2756° / 41°0
56 °
Porthill, Tuesday, 27 October
Overcast. High 56°, low 41°.
Pressure30.06 inHg
Wind3.4 mph SE
Humidity47%
Visibility—
Dew point33°
Wed, 2858° / 37°0
58 °
Porthill, Wednesday, 28 October
Clear. High 58°, low 37°.
Pressure30.27 inHg
Wind3.4 mph E
Humidity61%
Visibility—
Dew point36°
Thu, 2958° / 37°0
58 °
Porthill, Thursday, 29 October
Mostly clear. High 58°, low 37°.
Pressure30.09 inHg
Wind3.8 mph E
Humidity59%
Visibility—
Dew point35°
Fri, 3054° / 36°0.07
54 °
Porthill, Friday, 30 October
Light rain. High 54°, low 36°.
Pressure29.68 inHg
Wind4 mph SW
Humidity61%
Visibility—
Dew point35°
Sat, 3151° / 37°0.02
51 °
Porthill, Saturday, 31 October
Light rain. High 51°, low 37°.
Pressure29.83 inHg
Wind6 mph SW
Humidity62%
Visibility—
Dew point34°
Sun, 0153° / 33°0
53 °
Porthill, Sunday, 1 November
Overcast. High 53°, low 33°.
Pressure30.12 inHg
Wind4 mph W
Humidity65%
Visibility—
Dew point32°
Mon, 0252° / 33°0
52 °
Porthill, Monday, 2 November
Clear. High 52°, low 33°.
Pressure30.30 inHg
Wind2.4 mph NW
Humidity55%
Visibility—
Dew point29°
Tue, 0355° / 37°0.08
55 °
Porthill, Tuesday, 3 November
Light rain. High 55°, low 37°.
Pressure30.09 inHg
Wind4.5 mph S
Humidity56%
Visibility—
Dew point31°
Wed, 0445° / 43°0.4
45 °
Porthill, Wednesday, 4 November
Rain. High 45°, low 43°.
Pressure29.91 inHg
Wind3.4 mph SE
Humidity97%
Visibility—
Dew point43°
Thu, 0546° / 35°0.17
46 °
Porthill, Thursday, 5 November
Light rain. High 46°, low 35°.
Pressure29.68 inHg
Wind5.3 mph SW
Humidity79%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0644° / 33°0.19
44 °
Porthill, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.19 in
Chance of precipitation62%
Record high56° (2012)
Record low9° (1971)
Sat, 0744° / 33°0.18
44 °
Porthill, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.18 in
Chance of precipitation63%
Record high56° (2006)
Record low12° (2017)
Sun, 0844° / 32°0.13
44 °
Porthill, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.13 in
Chance of precipitation62%
Record high60° (2016)
Record low10° (1966)
Mon, 0943° / 32°0.13
43 °
Porthill, Monday, 9 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.13 in
Chance of precipitation55%
Record high61° (2016)
Record low8° (1986)
Tue, 1042° / 31°0.13
42 °
Porthill, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high42°
Average low31°
Average precipitation0.13 in
Chance of precipitation52%
Record high56° (2016)
Record low6° (1986)
Wed, 1142° / 31°0.15
42 °
Porthill, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high42°
Average low31°
Average precipitation0.15 in
Chance of precipitation47%
Record high57° (2016)
Record low-1° (1985)
Thu, 1243° / 32°0.17
43 °
Porthill, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.17 in
Chance of precipitation58%
Record high57° (2016)
Record low-1° (1985)
Fri, 1342° / 32°0.16
42 °
Porthill, Friday, 13 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.16 in
Chance of precipitation53%
Record high53° (2025)
Record low15° (1985)
Sat, 1442° / 32°0.18
42 °
Porthill, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.18 in
Chance of precipitation52%
Record high58° (1999)
Record low11° (1982)
Sun, 1542° / 31°0.14
42 °
Porthill, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high42°
Average low31°
Average precipitation0.14 in
Chance of precipitation57%
Record high57° (2001)
Record low10° (1964)
Mon, 1641° / 32°0.21
41 °
Porthill, Monday, 16 November
Climate normal for this date — 60-year average.
Average high41°
Average low32°
Average precipitation0.21 in
Chance of precipitation67%
Record high54° (1999)
Record low14° (1961)
Tue, 1740° / 30°0.2
40 °
Porthill, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high40°
Average low30°
Average precipitation0.2 in
Chance of precipitation65%
Record high54° (2008)
Record low10° (2000)
Wed, 1839° / 29°0.15
39 °
Porthill, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high39°
Average low29°
Average precipitation0.15 in
Chance of precipitation52%
Record high54° (2008)
Record low3° (1985)
Thu, 1939° / 29°0.15
39 °
Porthill, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high39°
Average low29°
Average precipitation0.15 in
Chance of precipitation52%
Record high47° (2008)
Record low4° (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 Porthill, ID 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 Porthill, ID 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.