As of 18:01 CDT

Weather in Eureka, SD

50°

Eureka, Wednesday, 14 October, 18:01

Overcast. Feels like 47°. High 50°, low 39°.

Pressure30.15 inHg

Wind6.1 mph SE

Humidity75%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

Monthly outlook for Eureka, SD: average high 59.8°, average low 42.4°. That is 3.6° above the climate normal for October. Precipitation is expected on 1 day (about 0.8 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 20 October (69.2°), the coolest 16 October (34.1°).

59.8°/42.4°

Average high / low

+3.6°

Above normal

1 / 3

Wet days / normal

0.8 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
14 October – 23 October	59.8°	54.6°	+2.9°
24 October – 2 November	59.9°	49.7°	+5.6°
3 November – 12 November	at normal	42.7°	—

October records over 66 years

88.3°4 October 1963All-time high

4.5°26 October 2020All-time low

Thu, 1550° / 39°

0.04

50 °

Eureka, Thursday, 15 October

Light rain. High 50°, low 39°.

Pressure30.21 inHg

Wind22.6 mph NW

Humidity51%

Visibility6.2 mi

Dew point34°

Fri, 1649° / 34°

0.01

49 °

Eureka, Friday, 16 October

Light rain. High 49°, low 34°.

Pressure30.74 inHg

Wind9.1 mph NW

Humidity64%

Visibility6.2 mi

Dew point29°

Sat, 1763° / 38°

63 °

Eureka, Saturday, 17 October

Clear. High 63°, low 38°.

Pressure30.15 inHg

Wind11.6 mph S

Humidity42%

Visibility6.2 mi

Dew point27°

Sun, 1864° / 43°

64 °

Eureka, Sunday, 18 October

Partly cloudy. High 64°, low 43°.

Pressure30.15 inHg

Wind13.2 mph N

Humidity42%

Visibility6.2 mi

Dew point37°

Mon, 1961° / 42°

61 °

Eureka, Monday, 19 October

Clear. High 61°, low 42°.

Pressure30.24 inHg

Wind10.7 mph SE

Humidity54%

Visibility—

Dew point40°

Tue, 2069° / 44°

69 °

Eureka, Tuesday, 20 October

Mostly clear. High 69°, low 44°.

Pressure30.00 inHg

Wind18.9 mph S

Humidity46%

Visibility—

Dew point41°

Wed, 2166° / 51°

66 °

Eureka, Wednesday, 21 October

Clear. High 66°, low 51°.

Pressure29.85 inHg

Wind15.4 mph SE

Humidity50%

Visibility—

Dew point45°

Thu, 2267° / 44°

67 °

Eureka, Thursday, 22 October

Clear. High 67°, low 44°.

Pressure30.00 inHg

Wind10.7 mph SE

Humidity44%

Visibility—

Dew point37°

Fri, 2360° / 47°

0.78

60 °

Eureka, Friday, 23 October

Rain. High 60°, low 47°.

Pressure29.71 inHg

Wind28 mph NW

Humidity89%

Visibility—

Dew point56°

Sat, 2451° / 42°

0.01

51 °

Eureka, Saturday, 24 October

Light rain. High 51°, low 42°.

Pressure30.18 inHg

Wind20.4 mph NW

Humidity45%

Visibility—

Dew point27°

Sun, 2550° / 35°

50 °

Eureka, Sunday, 25 October

Clear. High 50°, low 35°.

Pressure30.36 inHg

Wind17.7 mph NW

Humidity37%

Visibility—

Dew point21°

Mon, 2663° / 38°

63 °

Eureka, Monday, 26 October

Clear. High 63°, low 38°.

Pressure30.09 inHg

Wind12.2 mph S

Humidity30%

Visibility—

Dew point24°

Tue, 2765° / 47°

65 °

Eureka, Tuesday, 27 October

Partly cloudy. High 65°, low 47°.

Pressure29.83 inHg

Wind7 mph W

Humidity32%

Visibility—

Dew point30°

Wed, 2867° / 49°

67 °

Eureka, Wednesday, 28 October

Overcast. High 67°, low 49°.

Pressure29.65 inHg

Wind12.8 mph NW

Humidity33%

Visibility—

Dew point31°

Thu, 2964° / 46°

64 °

Eureka, Thursday, 29 October

Overcast. High 64°, low 46°.

Pressure30.00 inHg

Wind8.1 mph SE

Humidity47%

Visibility—

Dew point38°

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

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)

Sun, 0844° / 29°

0.05

44 °

Eureka, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high44°

Average low29°

Average precipitation0.05 in

Chance of precipitation20%

Record high69° (1978)

Record low3° (2003)

Mon, 0941° / 27°

0.04

41 °

Eureka, Monday, 9 November

Climate normal for this date — 60-year average.

Average high41°

Average low27°

Average precipitation0.04 in

Chance of precipitation18%

Record high63° (2016)

Record low8° (1986)

Tue, 1039° / 25°

0.06

39 °

Eureka, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high39°

Average low25°

Average precipitation0.06 in

Chance of precipitation22%

Record high62° (1989)

Record low-2° (1986)

Wed, 1138° / 24°

0.01

38 °

Eureka, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high38°

Average low24°

Average precipitation0.01 in

Chance of precipitation13%

Record high64° (2005)

Record low-2° (1986)

Thu, 1239° / 24°

0.03

39 °

Eureka, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high39°

Average low24°

Average precipitation0.03 in

Chance of precipitation15%

Record high63° (1999)

Record low-5° (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 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.