Monthly outlook for State Line, ID: average high 58.4°, average low 40.4°. That is 0.6° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 4 days and 1.0 inches. The warmest day looks like 16 October (69.4°), the coolest 22 October (35.7°).
58.4°/40.4°
Average high / low
+0.6°
Above normal
2 / 4
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
61.1°
58.9°
+1.2°
22 October – 31 October
54°
53°
+0.5°
1 November – 10 November
at normal
47.6°
—
October records over 66 years
85.8°1 October 1992All-time high
1.9°25 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Spokane Valley (10 mi).
Tue, 1358° / 39°0
58 °
State Line, Tuesday, 13 October
Mostly clear. High 58°, low 39°.
Pressure30.21 inHg
Wind3.5 mph SW
Humidity48%
Visibility6.2 mi
Dew point31°
Wed, 1459° / 38°0
59 °
State Line, Wednesday, 14 October
Clear. High 59°, low 38°.
Pressure30.27 inHg
Wind3.9 mph W
Humidity41%
Visibility6.2 mi
Dew point32°
Thu, 1564° / 40°0
64 °
State Line, Thursday, 15 October
Overcast. High 64°, low 40°.
Pressure30.47 inHg
Wind5.1 mph E
Humidity44%
Visibility6.2 mi
Dew point38°
Fri, 1669° / 43°0
69 °
State Line, Friday, 16 October
Clear. High 69°, low 43°.
Pressure30.27 inHg
Wind3.2 mph E
Humidity42%
Visibility6.2 mi
Dew point39°
Sat, 1766° / 46°0
66 °
State Line, Saturday, 17 October
Clear. High 66°, low 46°.
Pressure30.00 inHg
Wind10 mph SW
Humidity39%
Visibility—
Dew point34°
Sun, 1863° / 41°0
63 °
State Line, Sunday, 18 October
Clear. High 63°, low 41°.
Pressure30.06 inHg
Wind4.2 mph NE
Humidity49%
Visibility—
Dew point36°
Mon, 1965° / 41°0
65 °
State Line, Monday, 19 October
Overcast. High 65°, low 41°.
Pressure29.74 inHg
Wind5 mph SW
Humidity27%
Visibility—
Dew point23°
Tue, 2056° / 42°0.02
56 °
State Line, Tuesday, 20 October
Light rain. High 56°, low 42°.
Pressure29.85 inHg
Wind4.1 mph W
Humidity63%
Visibility—
Dew point38°
Wed, 2158° / 37°0
58 °
State Line, Wednesday, 21 October
Overcast. High 58°, low 37°.
Pressure29.97 inHg
Wind2.5 mph W
Humidity52%
Visibility—
Dew point31°
Thu, 2257° / 36°0
57 °
State Line, Thursday, 22 October
Clear. High 57°, low 36°.
Pressure30.12 inHg
Wind5.1 mph W
Humidity45%
Visibility—
Dew point29°
Fri, 2361° / 38°0
61 °
State Line, Friday, 23 October
Partly cloudy. High 61°, low 38°.
Pressure30.21 inHg
Wind3.4 mph E
Humidity39%
Visibility—
Dew point28°
Sat, 2453° / 46°0.52
53 °
State Line, Saturday, 24 October
Rain. High 53°, low 46°.
Pressure30.12 inHg
Wind3.9 mph NE
Humidity66%
Visibility—
Dew point41°
Sun, 2549° / 44°0
49 °
State Line, Sunday, 25 October
Light rain. High 49°, low 44°.
Pressure30.24 inHg
Wind2.8 mph E
Humidity84%
Visibility—
Dew point42°
Mon, 2653° / 42°0.06
53 °
State Line, Monday, 26 October
Light rain. High 53°, low 42°.
Pressure30.03 inHg
Wind6.2 mph SW
Humidity81%
Visibility—
Dew point45°
Tue, 2751° / 36°0
51 °
State Line, Tuesday, 27 October
Mostly clear. High 51°, low 36°.
Pressure30.18 inHg
Wind5.9 mph SW
Humidity65%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2852° / 36°0.08
52 °
State Line, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.08 in
Chance of precipitation38%
Record high65° (1987)
Record low19° (2023)
Thu, 2951° / 34°0.09
51 °
State Line, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.09 in
Chance of precipitation35%
Record high67° (1983)
Record low17° (2019)
Fri, 3050° / 35°0.07
50 °
State Line, Friday, 30 October
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.07 in
Chance of precipitation28%
Record high67° (2008)
Record low15° (2019)
Sat, 3150° / 35°0.09
50 °
State Line, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.09 in
Chance of precipitation32%
Record high68° (1988)
Record low17° (1984)
Sun, 0149° / 34°0.1
49 °
State Line, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.1 in
Chance of precipitation38%
Record high67° (1965)
Record low20° (2002)
Mon, 0249° / 35°0.1
49 °
State Line, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.1 in
Chance of precipitation38%
Record high64° (1981)
Record low21° (2002)
Tue, 0349° / 35°0.06
49 °
State Line, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.06 in
Chance of precipitation30%
Record high63° (1975)
Record low22° (2002)
Wed, 0449° / 35°0.14
49 °
State Line, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.14 in
Chance of precipitation45%
Record high67° (1975)
Record low22° (2017)
Thu, 0548° / 34°0.08
48 °
State Line, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.08 in
Chance of precipitation40%
Record high65° (1975)
Record low19° (2003)
Fri, 0647° / 34°0.1
47 °
State Line, Friday, 6 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.1 in
Chance of precipitation52%
Record high62° (2012)
Record low16° (1994)
Sat, 0747° / 33°0.13
47 °
State Line, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.13 in
Chance of precipitation45%
Record high62° (1999)
Record low14° (2017)
Sun, 0846° / 33°0.07
46 °
State Line, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.07 in
Chance of precipitation30%
Record high63° (2016)
Record low17° (2022)
Mon, 0946° / 32°0.09
46 °
State Line, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low32°
Average precipitation0.09 in
Chance of precipitation43%
Record high60° (2016)
Record low12° (2022)
Tue, 1045° / 32°0.09
45 °
State Line, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.09 in
Chance of precipitation45%
Record high59° (2016)
Record low14° (2022)
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 State Line, 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 State Line, 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.