Monthly outlook for De Grey, SD: average high 61.3°, average low 43.9°. That is 1.8° above the climate normal for October. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 21 October (76.2°), the coolest 26 October (32.6°).
61.3°/43.9°
Average high / low
+1.8°
Above normal
3 / 3
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
64.6°
59.3°
+3°
23 October – 1 November
55.6°
54.5°
+0.6°
2 November – 11 November
at normal
48.4°
—
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).
Wed, 1455° / 39°0
55 °
De Grey, Wednesday, 14 October
Overcast. High 55°, low 39°.
Pressure30.27 inHg
Wind2.1 mph SE
Humidity58%
Visibility6.2 mi
Dew point39°
Thu, 1559° / 48°0.06
59 °
De Grey, Thursday, 15 October
Light rain. High 59°, low 48°.
Pressure30.24 inHg
Wind14.1 mph NW
Humidity62%
Visibility6.2 mi
Dew point43°
Fri, 1653° / 40°0
53 °
De Grey, Friday, 16 October
Clear. High 53°, low 40°.
Pressure30.74 inHg
Wind9.8 mph NW
Humidity56%
Visibility6.2 mi
Dew point32°
Sat, 1771° / 43°0
71 °
De Grey, Saturday, 17 October
Clear. High 71°, low 43°.
Pressure30.09 inHg
Wind11.8 mph S
Humidity36%
Visibility6.2 mi
Dew point31°
Sun, 1870° / 48°0
70 °
De Grey, Sunday, 18 October
Overcast. High 70°, low 48°.
Pressure29.85 inHg
Wind6.8 mph S
Humidity45%
Visibility—
Dew point40°
Mon, 1965° / 43°0
65 °
De Grey, Monday, 19 October
Clear. High 65°, low 43°.
Pressure30.12 inHg
Wind15 mph S
Humidity37%
Visibility—
Dew point32°
Tue, 2076° / 50°0
76 °
De Grey, Tuesday, 20 October
Clear. High 76°, low 50°.
Pressure29.91 inHg
Wind18.9 mph S
Humidity30%
Visibility—
Dew point36°
Wed, 2176° / 57°0.01
76 °
De Grey, Wednesday, 21 October
Light rain. High 76°, low 57°.
Pressure29.68 inHg
Wind18.6 mph SE
Humidity58%
Visibility—
Dew point53°
Thu, 2268° / 52°0.16
68 °
De Grey, Thursday, 22 October
Light rain. High 68°, low 52°.
Pressure29.53 inHg
Wind16.5 mph S
Humidity54%
Visibility—
Dew point46°
Fri, 2363° / 46°0
63 °
De Grey, Friday, 23 October
Clear. High 63°, low 46°.
Pressure29.88 inHg
Wind11.1 mph W
Humidity39%
Visibility—
Dew point33°
Sat, 2470° / 50°0
70 °
De Grey, Saturday, 24 October
Mostly clear. High 70°, low 50°.
Pressure29.97 inHg
Wind15.8 mph SE
Humidity51%
Visibility—
Dew point44°
Sun, 2550° / 41°0.07
50 °
De Grey, Sunday, 25 October
Light rain. High 50°, low 41°.
Pressure30.12 inHg
Wind19.4 mph NW
Humidity69%
Visibility—
Dew point35°
Mon, 2650° / 33°0
50 °
De Grey, Monday, 26 October
Clear. High 50°, low 33°.
Pressure30.21 inHg
Wind8.5 mph NW
Humidity41%
Visibility—
Dew point22°
Tue, 2748° / 34°0
48 °
De Grey, Tuesday, 27 October
Overcast. High 48°, low 34°.
Pressure30.30 inHg
Wind6.2 mph NE
Humidity51%
Visibility—
Dew point26°
Wed, 2853° / 35°0
53 °
De Grey, Wednesday, 28 October
Overcast. High 53°, low 35°.
Pressure30.15 inHg
Wind5.5 mph NE
Humidity49%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2953° / 37°0.07
53 °
De Grey, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.07 in
Chance of precipitation27%
Record high76° (1978)
Record low16° (1991)
Fri, 3052° / 36°0.05
52 °
De Grey, Friday, 30 October
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.05 in
Chance of precipitation23%
Record high74° (1965)
Record low12° (1991)
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)
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.