Monthly outlook for Spirit Lake, ID: average high 85.9°, average low 54°. That is 2.4° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 23 August (97.3°), the coolest 14 August (48.6°).
85.9°/54°
Average high / low
+2.4°
Above normal
0 / 2
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
83°
82.9°
+0.1°
19 August – 28 August
90.7°
79.3°
+6.3°
29 August – 7 September
at normal
76.7°
—
August records over 66 years
106°4 August 1961All-time high
39.4°23 August 1992All-time low
Climate normals and records are computed from the nearest reference point — Athol (8 mi).
Mon, 1078° / 50°0
78 °
Spirit Lake, Monday, 10 August
Clear. High 78°, low 50°.
Pressure29.88 inHg
Wind5.5 mph SW
Humidity21%
Visibility6.2 mi
Dew point39°
Tue, 1185° / 49°0
85 °
Spirit Lake, Tuesday, 11 August
Clear. High 85°, low 49°.
Pressure29.91 inHg
Wind6.6 mph SW
Humidity21%
Visibility6.2 mi
Dew point39°
Wed, 1285° / 54°0
85 °
Spirit Lake, Wednesday, 12 August
Overcast. High 85°, low 54°.
Pressure29.83 inHg
Wind3.8 mph S
Humidity26%
Visibility6.2 mi
Dew point45°
Thu, 1383° / 50°0
83 °
Spirit Lake, Thursday, 13 August
Clear. High 83°, low 50°.
Pressure29.83 inHg
Wind4.1 mph N
Humidity36%
Visibility6.2 mi
Dew point50°
Fri, 1484° / 49°0
84 °
Spirit Lake, Friday, 14 August
Clear. High 84°, low 49°.
Pressure29.91 inHg
Wind5.1 mph NE
Humidity36%
Visibility—
Dew point42°
Sat, 1589° / 52°0.03
89 °
Spirit Lake, Saturday, 15 August
Light rain. High 89°, low 52°.
Pressure29.91 inHg
Wind5.4 mph SW
Humidity21%
Visibility—
Dew point36°
Sun, 1680° / 54°0.01
80 °
Spirit Lake, Sunday, 16 August
Light rain. High 80°, low 54°.
Pressure29.91 inHg
Wind9.1 mph SW
Humidity30%
Visibility—
Dew point39°
Mon, 1779° / 53°0
79 °
Spirit Lake, Monday, 17 August
Overcast. High 79°, low 53°.
Pressure29.94 inHg
Wind8.7 mph SW
Humidity34%
Visibility—
Dew point40°
Tue, 1880° / 54°0
80 °
Spirit Lake, Tuesday, 18 August
Overcast. High 80°, low 54°.
Pressure29.97 inHg
Wind9.2 mph SW
Humidity36%
Visibility—
Dew point42°
Wed, 1982° / 55°0
82 °
Spirit Lake, Wednesday, 19 August
Overcast. High 82°, low 55°.
Pressure29.97 inHg
Wind7.1 mph SW
Humidity38%
Visibility—
Dew point46°
Thu, 2086° / 58°0
86 °
Spirit Lake, Thursday, 20 August
Partly cloudy. High 86°, low 58°.
Pressure30.00 inHg
Wind7.6 mph SW
Humidity30%
Visibility—
Dew point42°
Fri, 2190° / 59°0
90 °
Spirit Lake, Friday, 21 August
Partly cloudy. High 90°, low 59°.
Pressure30.00 inHg
Wind7.4 mph SW
Humidity32%
Visibility—
Dew point47°
Sat, 2293° / 59°0
93 °
Spirit Lake, Saturday, 22 August
Clear. High 93°, low 59°.
Pressure30.00 inHg
Wind5.9 mph W
Humidity25%
Visibility—
Dew point44°
Sun, 2397° / 60°0
97 °
Spirit Lake, Sunday, 23 August
Mostly clear. High 97°, low 60°.
Pressure29.97 inHg
Wind5.4 mph W
Humidity19%
Visibility—
Dew point39°
Mon, 2497° / 60°0
97 °
Spirit Lake, Monday, 24 August
Clear. High 97°, low 60°.
Pressure29.85 inHg
Wind9.3 mph SW
Humidity17%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2578° / 56°0.05
78 °
Spirit Lake, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low56°
Average precipitation0.05 in
Chance of precipitation13%
Record high95° (2025)
Record low42° (1992)
Wed, 2680° / 56°0.03
80 °
Spirit Lake, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low56°
Average precipitation0.03 in
Chance of precipitation10%
Record high96° (1996)
Record low45° (1960)
Thu, 2779° / 56°0.03
79 °
Spirit Lake, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low56°
Average precipitation0.03 in
Chance of precipitation15%
Record high93° (1986)
Record low42° (1960)
Fri, 2879° / 56°0.03
79 °
Spirit Lake, Friday, 28 August
Climate normal for this date — 60-year average.
Average high79°
Average low56°
Average precipitation0.03 in
Chance of precipitation10%
Record high97° (1986)
Record low45° (1960)
Sat, 2980° / 56°0.02
80 °
Spirit Lake, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low56°
Average precipitation0.02 in
Chance of precipitation13%
Record high98° (2017)
Record low41° (1965)
Sun, 3078° / 56°0.04
78 °
Spirit Lake, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high78°
Average low56°
Average precipitation0.04 in
Chance of precipitation15%
Record high93° (1967)
Record low44° (1965)
Mon, 3176° / 55°0.04
76 °
Spirit Lake, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low55°
Average precipitation0.04 in
Chance of precipitation18%
Record high98° (1967)
Record low42° (1964)
Tue, 0177° / 55°0.03
77 °
Spirit Lake, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low55°
Average precipitation0.03 in
Chance of precipitation13%
Record high97° (2025)
Record low44° (1973)
Wed, 0276° / 55°0.05
76 °
Spirit Lake, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high76°
Average low55°
Average precipitation0.05 in
Chance of precipitation15%
Record high99° (2025)
Record low44° (2021)
Thu, 0377° / 54°0.04
77 °
Spirit Lake, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low54°
Average precipitation0.04 in
Chance of precipitation20%
Record high99° (1988)
Record low40° (2000)
Fri, 0477° / 55°0.03
77 °
Spirit Lake, Friday, 4 September
Climate normal for this date — 60-year average.
Average high77°
Average low55°
Average precipitation0.03 in
Chance of precipitation17%
Record high98° (1988)
Record low44° (2014)
Sat, 0576° / 55°0.02
76 °
Spirit Lake, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low55°
Average precipitation0.02 in
Chance of precipitation12%
Record high96° (1988)
Record low46° (1992)
Sun, 0675° / 54°0.05
75 °
Spirit Lake, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low54°
Average precipitation0.05 in
Chance of precipitation20%
Record high94° (2017)
Record low44° (1960)
Mon, 0775° / 53°0.02
75 °
Spirit Lake, Monday, 7 September
Climate normal for this date — 60-year average.
Average high75°
Average low53°
Average precipitation0.02 in
Chance of precipitation12%
Record high94° (2017)
Record low42° (1992)
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 Spirit Lake, 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 Spirit Lake, 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.