Monthly outlook for Green Grass, SD: average high 60.7°, average low 42.2°. That is 1.1° 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 10 October (83.2°), the coolest 17 October (24.9°).
60.7°/42.2°
Average high / low
+1.1°
Above normal
3 / 3
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
58.2°
59.6°
-0.8°
20 October – 29 October
64.8°
56.1°
+4.9°
30 October – 8 November
at normal
49.7°
—
October records over 66 years
91.9°4 October 1963All-time high
-4°30 October 1991All-time low
Sun, 1157° / 48°0.11
57 °
Green Grass, Sunday, 11 October
Rain. High 57°, low 48°.
Pressure29.80 inHg
Wind13.1 mph NE
Humidity76%
Visibility6.2 mi
Dew point49°
Mon, 1255° / 46°0.11
55 °
Green Grass, Monday, 12 October
Light rain. High 55°, low 46°.
Pressure29.85 inHg
Wind6.2 mph N
Humidity76%
Visibility6.2 mi
Dew point46°
Tue, 1351° / 42°0
51 °
Green Grass, Tuesday, 13 October
Partly cloudy. High 51°, low 42°.
Pressure30.09 inHg
Wind2.5 mph N
Humidity61%
Visibility6.2 mi
Dew point34°
Wed, 1459° / 41°0
59 °
Green Grass, Wednesday, 14 October
Clear. High 59°, low 41°.
Pressure30.27 inHg
Wind0.8 mph NE
Humidity50%
Visibility6.2 mi
Dew point38°
Thu, 1564° / 48°0.04
64 °
Green Grass, Thursday, 15 October
Light rain. High 64°, low 48°.
Pressure30.36 inHg
Wind11.9 mph N
Humidity51%
Visibility—
Dew point40°
Fri, 1644° / 31°0
44 °
Green Grass, Friday, 16 October
Overcast. High 44°, low 31°.
Pressure30.65 inHg
Wind26.8 mph N
Humidity41%
Visibility—
Dew point16°
Sat, 1739° / 25°0
39 °
Green Grass, Saturday, 17 October
Clear. High 39°, low 25°.
Pressure30.65 inHg
Wind10.8 mph SE
Humidity26%
Visibility—
Dew point2°
Sun, 1855° / 30°0
55 °
Green Grass, Sunday, 18 October
Overcast. High 55°, low 30°.
Pressure30.15 inHg
Wind19.4 mph S
Humidity27%
Visibility—
Dew point14°
Mon, 1974° / 45°0
74 °
Green Grass, Monday, 19 October
Clear. High 74°, low 45°.
Pressure30.03 inHg
Wind13.4 mph W
Humidity22%
Visibility—
Dew point27°
Tue, 2078° / 53°0
78 °
Green Grass, Tuesday, 20 October
Overcast. High 78°, low 53°.
Pressure29.83 inHg
Wind14.1 mph S
Humidity24%
Visibility—
Dew point30°
Wed, 2166° / 51°0
66 °
Green Grass, Wednesday, 21 October
Overcast. High 66°, low 51°.
Pressure30.00 inHg
Wind15.8 mph N
Humidity22%
Visibility—
Dew point22°
Thu, 2254° / 41°0
54 °
Green Grass, Thursday, 22 October
Overcast. High 54°, low 41°.
Pressure30.47 inHg
Wind21.4 mph NW
Humidity55%
Visibility—
Dew point30°
Fri, 2353° / 34°0
53 °
Green Grass, Friday, 23 October
Mostly clear. High 53°, low 34°.
Pressure30.45 inHg
Wind11.4 mph SE
Humidity45%
Visibility—
Dew point26°
Sat, 2465° / 40°0
65 °
Green Grass, Saturday, 24 October
Overcast. High 65°, low 40°.
Pressure30.06 inHg
Wind15.1 mph S
Humidity34%
Visibility—
Dew point28°
Sun, 2573° / 47°0
73 °
Green Grass, Sunday, 25 October
Mostly clear. High 73°, low 47°.
Pressure30.00 inHg
Wind7.4 mph SE
Humidity29%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2656° / 37°0.04
56 °
Green Grass, Monday, 26 October
Climate normal for this date — 60-year average.
Average high56°
Average low37°
Average precipitation0.04 in
Chance of precipitation10%
Record high78° (1990)
Record low-3° (2020)
Tue, 2754° / 36°0.02
54 °
Green Grass, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low36°
Average precipitation0.02 in
Chance of precipitation15%
Record high76° (1983)
Record low8° (2020)
Wed, 2854° / 35°0.06
54 °
Green Grass, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low35°
Average precipitation0.06 in
Chance of precipitation17%
Record high76° (1985)
Record low16° (1991)
Thu, 2952° / 35°0.11
52 °
Green Grass, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high52°
Average low35°
Average precipitation0.11 in
Chance of precipitation28%
Record high75° (1968)
Record low6° (1991)
Fri, 3051° / 34°0.03
51 °
Green Grass, Friday, 30 October
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.03 in
Chance of precipitation17%
Record high76° (1968)
Record low-4° (1991)
Sat, 3151° / 34°0.03
51 °
Green Grass, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.03 in
Chance of precipitation17%
Record high77° (1990)
Record low-1° (1991)
Sun, 0150° / 34°0.04
50 °
Green Grass, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high50°
Average low34°
Average precipitation0.04 in
Chance of precipitation15%
Record high72° (1978)
Record low8° (1991)
Mon, 0251° / 33°0.02
51 °
Green Grass, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.02 in
Chance of precipitation12%
Record high77° (2022)
Record low3° (1991)
Tue, 0349° / 34°0.03
49 °
Green Grass, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.03 in
Chance of precipitation17%
Record high69° (2020)
Record low-3° (1991)
Wed, 0450° / 32°0.01
50 °
Green Grass, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.01 in
Chance of precipitation8%
Record high77° (1978)
Record low-3° (1991)
Thu, 0549° / 32°0.04
49 °
Green Grass, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.04 in
Chance of precipitation17%
Record high71° (2020)
Record low3° (2003)
Fri, 0649° / 31°0.02
49 °
Green Grass, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.02 in
Chance of precipitation7%
Record high71° (2016)
Record low6° (1991)
Sat, 0749° / 30°0.04
49 °
Green Grass, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.04 in
Chance of precipitation13%
Record high72° (2006)
Record low-4° (1991)
Sun, 0848° / 30°0.04
48 °
Green Grass, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.04 in
Chance of precipitation12%
Record high75° (1999)
Record low5° (2000)
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 Green Grass, 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 Green Grass, 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.