Monthly outlook for De Grey, SD: average high 58°, average low 44.1°. That is 0.4° above the climate normal for October. Precipitation is expected on 3 days (about 1.3 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 22 October (75°), the coolest 30 October (26.7°).
58°/44.1°
Average high / low
+0.4°
Above normal
3 / 3
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
64°
58.6°
+3°
25 October – 3 November
48°
53.3°
-2.9°
4 November – 13 November
at normal
47.3°
—
October records over 66 years
91°3 October 2025All-time high
1°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Canning (10 mi).
Fri, 1652° / 41°0.01
52 °
De Grey, Friday, 16 October
Light rain. High 52°, low 41°.
Pressure30.74 inHg
Wind7 mph NW
Humidity57%
Visibility6.2 mi
Dew point32°
Sat, 1770° / 42°0
70 °
De Grey, Saturday, 17 October
Clear. High 70°, low 42°.
Pressure30.18 inHg
Wind10.9 mph S
Humidity37%
Visibility6.2 mi
Dew point31°
Sun, 1868° / 46°0
68 °
De Grey, Sunday, 18 October
Clear. High 68°, low 46°.
Pressure30.06 inHg
Wind7.6 mph N
Humidity47%
Visibility6.2 mi
Dew point41°
Mon, 1964° / 44°0
64 °
De Grey, Monday, 19 October
Clear. High 64°, low 44°.
Pressure30.12 inHg
Wind8.4 mph SE
Humidity60%
Visibility—
Dew point44°
Tue, 2068° / 49°0
68 °
De Grey, Tuesday, 20 October
Clear. High 68°, low 49°.
Pressure30.06 inHg
Wind13.6 mph SE
Humidity66%
Visibility—
Dew point50°
Wed, 2173° / 56°0
73 °
De Grey, Wednesday, 21 October
Overcast. High 73°, low 56°.
Pressure29.91 inHg
Wind16.3 mph S
Humidity58%
Visibility—
Dew point55°
Thu, 2275° / 61°0.01
75 °
De Grey, Thursday, 22 October
Light rain. High 75°, low 61°.
Pressure29.74 inHg
Wind18.9 mph SE
Humidity58%
Visibility—
Dew point57°
Fri, 2365° / 52°1.09
65 °
De Grey, Friday, 23 October
Heavy rain. High 65°, low 52°.
Pressure29.50 inHg
Wind19.5 mph W
Humidity85%
Visibility—
Dew point58°
Sat, 2447° / 42°0.04
47 °
De Grey, Saturday, 24 October
Light rain. High 47°, low 42°.
Pressure30.09 inHg
Wind28.1 mph NW
Humidity55%
Visibility—
Dew point31°
Sun, 2549° / 39°0
49 °
De Grey, Sunday, 25 October
Clear. High 49°, low 39°.
Pressure30.33 inHg
Wind15.8 mph NW
Humidity39%
Visibility—
Dew point22°
Mon, 2647° / 38°0
47 °
De Grey, Monday, 26 October
Overcast. High 47°, low 38°.
Pressure30.42 inHg
Wind8.5 mph NW
Humidity36%
Visibility—
Dew point19°
Tue, 2754° / 40°0
54 °
De Grey, Tuesday, 27 October
Overcast. High 54°, low 40°.
Pressure30.21 inHg
Wind8.7 mph W
Humidity56%
Visibility—
Dew point35°
Wed, 2847° / 44°0.07
47 °
De Grey, Wednesday, 28 October
Light rain. High 47°, low 44°.
Pressure30.06 inHg
Wind8 mph E
Humidity86%
Visibility—
Dew point41°
Thu, 2953° / 38°0
53 °
De Grey, Thursday, 29 October
Overcast. High 53°, low 38°.
Pressure30.18 inHg
Wind14.3 mph NE
Humidity69%
Visibility—
Dew point40°
Fri, 3039° / 27°0
39 °
De Grey, Friday, 30 October
Overcast. High 39°, low 27°.
Pressure30.68 inHg
Wind9.1 mph NE
Humidity44%
Visibility—
Dew point14°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3153° / 36°0.04
53 °
De Grey, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.04 in
Chance of precipitation18%
Record high80° (1990)
Record low16° (1991)
Sun, 0150° / 36°0.02
50 °
De Grey, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.02 in
Chance of precipitation15%
Record high74° (1990)
Record low16° (1991)
Mon, 0251° / 35°0.02
51 °
De Grey, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.02 in
Chance of precipitation17%
Record high73° (2022)
Record low9° (1991)
Tue, 0350° / 35°0.02
50 °
De Grey, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.02 in
Chance of precipitation17%
Record high71° (1978)
Record low6° (1991)
Wed, 0450° / 33°0.01
50 °
De Grey, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.01 in
Chance of precipitation8%
Record high76° (1978)
Record low6° (1991)
Thu, 0551° / 34°0.04
51 °
De Grey, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.04 in
Chance of precipitation15%
Record high74° (2001)
Record low14° (2003)
Fri, 0650° / 32°0.02
50 °
De Grey, Friday, 6 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.02 in
Chance of precipitation15%
Record high74° (2020)
Record low4° (2003)
Sat, 0750° / 32°0.04
50 °
De Grey, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.04 in
Chance of precipitation13%
Record high71° (2006)
Record low1° (1971)
Sun, 0849° / 32°0.07
49 °
De Grey, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.07 in
Chance of precipitation17%
Record high78° (1999)
Record low10° (1991)
Mon, 0946° / 31°0.04
46 °
De Grey, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.04 in
Chance of precipitation22%
Record high67° (2016)
Record low10° (1966)
Tue, 1044° / 28°0.05
44 °
De Grey, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.05 in
Chance of precipitation23%
Record high67° (1989)
Record low2° (1986)
Wed, 1143° / 28°0.02
43 °
De Grey, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.02 in
Chance of precipitation13%
Record high66° (2005)
Record low-1° (1986)
Thu, 1244° / 28°0.05
44 °
De Grey, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.05 in
Chance of precipitation17%
Record high68° (1999)
Record low0° (1986)
Fri, 1346° / 29°0.03
46 °
De Grey, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high70° (1981)
Record low-10° (1986)
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 De Grey, SD 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 De Grey, SD 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.