As of 07:23 CDT

Weather in Eureka, SD

48°

Eureka, Friday, 9 October, 07:23

Overcast. Feels like 44°. High 77°, low 46°.

Pressure29.85 inHg

Wind8 mph SE

Humidity72%

Visibility6.2 mi

Dew point39°

See detailed hourly forecast

Monthly outlook for Eureka, SD: average high 60.2°, average low 44.6°. That is 2.5° above the climate normal for October. Precipitation is expected on 6 days (about 1.6 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 10 October (84.9°), the coolest 17 October (29.9°).

60.2°/44.6°

Average high / low

+2.5°

Above normal

6 / 3

Wet days / normal

1.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 October – 18 October	59°	56.6°	+1.3°
19 October – 28 October	62.2°	53.2°	+5°
29 October – 7 November	at normal	46.6°	—

October records over 66 years

88.3°4 October 1963All-time high

4.5°26 October 2020All-time low

Sat, 1085° / 57°

85 °

Eureka, Saturday, 10 October

Clear. High 85°, low 57°.

Pressure29.47 inHg

Wind9.8 mph S

Humidity36%

Visibility6.2 mi

Dew point48°

Sun, 1161° / 48°

61 °

Eureka, Sunday, 11 October

Overcast. High 61°, low 48°.

Pressure29.80 inHg

Wind17.2 mph NE

Humidity82%

Visibility6.2 mi

Dew point49°

Mon, 1250° / 44°

0.11

50 °

Eureka, Monday, 12 October

Light rain. High 50°, low 44°.

Pressure29.94 inHg

Wind8.7 mph NE

Humidity87%

Visibility5.4 mi

Dew point43°

Tue, 1351° / 45°

0.01

51 °

Eureka, Tuesday, 13 October

Light rain. High 51°, low 45°.

Pressure30.06 inHg

Wind9.1 mph N

Humidity68%

Visibility—

Dew point38°

Wed, 1452° / 45°

0.24

52 °

Eureka, Wednesday, 14 October

Light rain. High 52°, low 45°.

Pressure29.97 inHg

Wind9.1 mph E

Humidity72%

Visibility—

Dew point40°

Thu, 1555° / 42°

1.02

55 °

Eureka, Thursday, 15 October

Rain. High 55°, low 42°.

Pressure29.65 inHg

Wind29.5 mph NW

Humidity88%

Visibility—

Dew point44°

Fri, 1643° / 34°

0.04

43 °

Eureka, Friday, 16 October

Snow. High 43°, low 34°.

Pressure30.21 inHg

Wind28.8 mph NW

Humidity58%

Visibility—

Dew point25°

Sat, 1753° / 30°

53 °

Eureka, Saturday, 17 October

Overcast. High 53°, low 30°.

Pressure30.27 inHg

Wind16 mph S

Humidity29%

Visibility—

Dew point14°

Sun, 1863° / 42°

63 °

Eureka, Sunday, 18 October

Overcast. High 63°, low 42°.

Pressure30.06 inHg

Wind7.6 mph SE

Humidity32%

Visibility—

Dew point27°

Mon, 1962° / 46°

62 °

Eureka, Monday, 19 October

Overcast. High 62°, low 46°.

Pressure30.09 inHg

Wind10.7 mph SE

Humidity40%

Visibility—

Dew point33°

Tue, 2072° / 47°

72 °

Eureka, Tuesday, 20 October

Clear. High 72°, low 47°.

Pressure29.85 inHg

Wind13.6 mph S

Humidity38%

Visibility—

Dew point38°

Wed, 2161° / 48°

61 °

Eureka, Wednesday, 21 October

Clear. High 61°, low 48°.

Pressure30.06 inHg

Wind14 mph NE

Humidity57%

Visibility—

Dew point43°

Thu, 2257° / 44°

57 °

Eureka, Thursday, 22 October

Overcast. High 57°, low 44°.

Pressure30.30 inHg

Wind11.6 mph NE

Humidity64%

Visibility—

Dew point42°

Fri, 2358° / 44°

0.08

58 °

Eureka, Friday, 23 October

Light rain. High 58°, low 44°.

Pressure30.15 inHg

Wind15.1 mph SE

Humidity65%

Visibility—

Dew point43°

Sat, 2462° / 51°

0.11

62 °

Eureka, Saturday, 24 October

Light rain. High 62°, low 51°.

Pressure29.88 inHg

Wind13.9 mph SE

Humidity71%

Visibility—

Dew point49°

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

Sun, 2553° / 36°

0.03

53 °

Eureka, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high53°

Average low36°

Average precipitation0.03 in

Chance of precipitation15%

Record high77° (1989)

Record low12° (2020)

Mon, 2653° / 36°

0.04

53 °

Eureka, Monday, 26 October

Climate normal for this date — 60-year average.

Average high53°

Average low36°

Average precipitation0.04 in

Chance of precipitation15%

Record high74° (1990)

Record low4° (2020)

Tue, 2751° / 35°

0.04

51 °

Eureka, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high51°

Average low35°

Average precipitation0.04 in

Chance of precipitation22%

Record high70° (1983)

Record low11° (2020)

Wed, 2850° / 34°

0.04

50 °

Eureka, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high50°

Average low34°

Average precipitation0.04 in

Chance of precipitation13%

Record high69° (2016)

Record low17° (2023)

Thu, 2949° / 34°

0.09

49 °

Eureka, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high49°

Average low34°

Average precipitation0.09 in

Chance of precipitation30%

Record high67° (2007)

Record low12° (1991)

Fri, 3048° / 33°

0.05

48 °

Eureka, Friday, 30 October

Climate normal for this date — 60-year average.

Average high48°

Average low33°

Average precipitation0.05 in

Chance of precipitation20%

Record high68° (1965)

Record low6° (1991)

Sat, 3148° / 32°

0.04

48 °

Eureka, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high48°

Average low32°

Average precipitation0.04 in

Chance of precipitation13%

Record high72° (1990)

Record low11° (1991)

Sun, 0147° / 32°

0.04

47 °

Eureka, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high47°

Average low32°

Average precipitation0.04 in

Chance of precipitation20%

Record high69° (2022)

Record low11° (1984)

Mon, 0247° / 31°

0.02

47 °

Eureka, Monday, 2 November

Climate normal for this date — 60-year average.

Average high47°

Average low31°

Average precipitation0.02 in

Chance of precipitation12%

Record high74° (2022)

Record low6° (1991)

Tue, 0346° / 31°

0.02

46 °

Eureka, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high46°

Average low31°

Average precipitation0.02 in

Chance of precipitation12%

Record high67° (1978)

Record low1° (1991)

Wed, 0446° / 29°

0.01

46 °

Eureka, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high46°

Average low29°

Average precipitation0.01 in

Chance of precipitation10%

Record high69° (1978)

Record low2° (1991)

Thu, 0546° / 30°

0.04

46 °

Eureka, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high46°

Average low30°

Average precipitation0.04 in

Chance of precipitation18%

Record high69° (1975)

Record low5° (2003)

Fri, 0645° / 29°

0.02

45 °

Eureka, Friday, 6 November

Climate normal for this date — 60-year average.

Average high45°

Average low29°

Average precipitation0.02 in

Chance of precipitation10%

Record high69° (2016)

Record low-4° (1991)

Sat, 0745° / 29°

0.04

45 °

Eureka, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high45°

Average low29°

Average precipitation0.04 in

Chance of precipitation13%

Record high67° (2006)

Record low-6° (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 Eureka, 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 Eureka, 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.