As of 18:39 CDT

Weather in Riverside, SD

76°

Riverside, Friday, 9 October, 18:39

Clear. Feels like 76°. High 78°, low 51°.

Pressure29.68 inHg

Wind11.5 mph SE

Humidity60%

Visibility6.2 mi

Dew point61°

See detailed hourly forecast

Monthly outlook for Riverside, SD: average high 66.9°, average low 48.1°. That is 3.6° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 10 October (88.2°), the coolest 17 October (30.2°).

66.9°/48.1°

Average high / low

+3.6°

Above normal

1 / 3

Wet days / normal

0.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 October – 18 October	65°	61.4°	+2°
19 October – 28 October	70.1°	57.8°	+6.9°
29 October – 7 November	at normal	51.7°	—

October records over 66 years

92.5°3 October 2025All-time high

7.2°27 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Ethan (12 mi).

Sat, 1088° / 67°

88 °

Riverside, Saturday, 10 October

Clear. High 88°, low 67°.

Pressure29.59 inHg

Wind17.1 mph S

Humidity31%

Visibility6.2 mi

Dew point49°

Sun, 1185° / 61°

85 °

Riverside, Sunday, 11 October

Overcast. High 85°, low 61°.

Pressure29.65 inHg

Wind10 mph S

Humidity37%

Visibility6.2 mi

Dew point51°

Mon, 1268° / 54°

0.02

68 °

Riverside, Monday, 12 October

Light rain. High 68°, low 54°.

Pressure29.80 inHg

Wind10.8 mph NE

Humidity76%

Visibility6.2 mi

Dew point51°

Tue, 1359° / 48°

59 °

Riverside, Tuesday, 13 October

Overcast. High 59°, low 48°.

Pressure30.06 inHg

Wind11 mph N

Humidity63%

Visibility6.2 mi

Dew point42°

Wed, 1462° / 46°

62 °

Riverside, Wednesday, 14 October

Clear. High 62°, low 46°.

Pressure30.24 inHg

Wind8 mph E

Humidity50%

Visibility—

Dew point38°

Thu, 1557° / 50°

0.19

57 °

Riverside, Thursday, 15 October

Light rain. High 57°, low 50°.

Pressure29.77 inHg

Wind32.3 mph NW

Humidity88%

Visibility—

Dew point53°

Fri, 1648° / 41°

48 °

Riverside, Friday, 16 October

Overcast. High 48°, low 41°.

Pressure30.24 inHg

Wind29 mph NW

Humidity41%

Visibility—

Dew point24°

Sat, 1746° / 30°

46 °

Riverside, Saturday, 17 October

Clear. High 46°, low 30°.

Pressure30.59 inHg

Wind20 mph NW

Humidity31%

Visibility—

Dew point11°

Sun, 1860° / 36°

60 °

Riverside, Sunday, 18 October

Overcast. High 60°, low 36°.

Pressure30.18 inHg

Wind17.2 mph S

Humidity33%

Visibility—

Dew point25°

Mon, 1965° / 42°

65 °

Riverside, Monday, 19 October

Clear. High 65°, low 42°.

Pressure30.18 inHg

Wind6.9 mph SE

Humidity39%

Visibility—

Dew point34°

Tue, 2074° / 46°

74 °

Riverside, Tuesday, 20 October

Clear. High 74°, low 46°.

Pressure30.12 inHg

Wind16.6 mph S

Humidity35%

Visibility—

Dew point37°

Wed, 2171° / 53°

71 °

Riverside, Wednesday, 21 October

Clear. High 71°, low 53°.

Pressure30.06 inHg

Wind16.1 mph N

Humidity42%

Visibility—

Dew point42°

Thu, 2266° / 44°

66 °

Riverside, Thursday, 22 October

Clear. High 66°, low 44°.

Pressure30.15 inHg

Wind8.7 mph SE

Humidity31%

Visibility—

Dew point28°

Fri, 2379° / 49°

79 °

Riverside, Friday, 23 October

Clear. High 79°, low 49°.

Pressure29.71 inHg

Wind16 mph S

Humidity36%

Visibility—

Dew point41°

Sat, 2467° / 50°

67 °

Riverside, Saturday, 24 October

Mostly clear. High 67°, low 50°.

Pressure29.97 inHg

Wind9.4 mph NW

Humidity48%

Visibility—

Dew point42°

From day 17 onward the outlook is built from 60-year climate statistics

Sun, 2557° / 40°

0.04

57 °

Riverside, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high57°

Average low40°

Average precipitation0.04 in

Chance of precipitation20%

Record high80° (1989)

Record low21° (2020)

Mon, 2657° / 39°

0.02

57 °

Riverside, Monday, 26 October

Climate normal for this date — 60-year average.

Average high57°

Average low39°

Average precipitation0.02 in

Chance of precipitation18%

Record high78° (1989)

Record low13° (2020)

Tue, 2756° / 39°

0.06

56 °

Riverside, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high56°

Average low39°

Average precipitation0.06 in

Chance of precipitation33%

Record high76° (1999)

Record low7° (2020)

Wed, 2855° / 38°

0.03

55 °

Riverside, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high55°

Average low38°

Average precipitation0.03 in

Chance of precipitation15%

Record high76° (2016)

Record low17° (2017)

Thu, 2954° / 38°

0.07

54 °

Riverside, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high54°

Average low38°

Average precipitation0.07 in

Chance of precipitation20%

Record high72° (1978)

Record low20° (1991)

Fri, 3053° / 37°

0.12

53 °

Riverside, Friday, 30 October

Climate normal for this date — 60-year average.

Average high53°

Average low37°

Average precipitation0.12 in

Chance of precipitation30%

Record high74° (1965)

Record low16° (1991)

Sat, 3153° / 35°

0.06

53 °

Riverside, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high53°

Average low35°

Average precipitation0.06 in

Chance of precipitation18%

Record high77° (2016)

Record low11° (2002)

Sun, 0152° / 36°

0.04

52 °

Riverside, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high52°

Average low36°

Average precipitation0.04 in

Chance of precipitation15%

Record high73° (1990)

Record low14° (2002)

Mon, 0251° / 35°

0.04

51 °

Riverside, Monday, 2 November

Climate normal for this date — 60-year average.

Average high51°

Average low35°

Average precipitation0.04 in

Chance of precipitation13%

Record high75° (2005)

Record low11° (1991)

Tue, 0351° / 35°

0.04

51 °

Riverside, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high51°

Average low35°

Average precipitation0.04 in

Chance of precipitation15%

Record high75° (1978)

Record low6° (1991)

Wed, 0451° / 33°

0.01

51 °

Riverside, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high51°

Average low33°

Average precipitation0.01 in

Chance of precipitation7%

Record high74° (2020)

Record low-10° (1991)

Thu, 0551° / 34°

0.03

51 °

Riverside, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high51°

Average low34°

Average precipitation0.03 in

Chance of precipitation17%

Record high75° (2001)

Record low13° (2003)

Fri, 0650° / 33°

0.02

50 °

Riverside, Friday, 6 November

Climate normal for this date — 60-year average.

Average high50°

Average low33°

Average precipitation0.02 in

Chance of precipitation15%

Record high80° (2020)

Record low4° (2003)

Sat, 0751° / 33°

0.03

51 °

Riverside, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high51°

Average low33°

Average precipitation0.03 in

Chance of precipitation13%

Record high76° (2020)

Record low-3° (1991)

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 Riverside, 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 Riverside, 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.