As of 10:04 CDT

Weather in Eureka, SD

67°

Eureka, Saturday, 10 October, 10:04

Clear. Feels like 66°. High 82°, low 57°.

Pressure29.38 inHg

Wind4 mph SE

Humidity57%

Visibility6.2 mi

Dew point51°

See detailed hourly forecast

Monthly outlook for Eureka, SD: average high 56.4°, average low 39.5°. That is 0.6° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 10 October (81.7°), the coolest 17 October (20.6°).

56.4°/39.5°

Average high / low

+0.6°

Above normal

1 / 3

Wet days / normal

0.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
10 October – 19 October	56.7°	56.2°	+0.3°
20 October – 29 October	56°	52.5°	+1.9°
30 October – 8 November	at normal	46°	—

October records over 66 years

88.3°4 October 1963All-time high

4.5°26 October 2020All-time low

Sun, 1159° / 45°

59 °

Eureka, Sunday, 11 October

Overcast. High 59°, low 45°.

Pressure29.80 inHg

Wind16.4 mph NE

Humidity83%

Visibility6.2 mi

Dew point50°

Mon, 1254° / 42°

0.06

54 °

Eureka, Monday, 12 October

Light rain. High 54°, low 42°.

Pressure29.85 inHg

Wind9.3 mph N

Humidity90%

Visibility2.6 mi

Dew point46°

Tue, 1350° / 43°

50 °

Eureka, Tuesday, 13 October

Overcast. High 50°, low 43°.

Pressure30.12 inHg

Wind5.9 mph NW

Humidity71%

Visibility6.2 mi

Dew point37°

Wed, 1457° / 39°

57 °

Eureka, Wednesday, 14 October

Clear. High 57°, low 39°.

Pressure30.30 inHg

Wind5.5 mph E

Humidity55%

Visibility—

Dew point36°

Thu, 1559° / 41°

59 °

Eureka, Thursday, 15 October

Overcast. High 59°, low 41°.

Pressure30.33 inHg

Wind6.4 mph E

Humidity61%

Visibility—

Dew point40°

Fri, 1646° / 29°

46 °

Eureka, Friday, 16 October

Overcast. High 46°, low 29°.

Pressure30.42 inHg

Wind27 mph NW

Humidity49%

Visibility—

Dew point19°

Sat, 1741° / 21°

41 °

Eureka, Saturday, 17 October

Clear. High 41°, low 21°.

Pressure30.59 inHg

Wind13.9 mph NW

Humidity29%

Visibility—

Dew point5°

Sun, 1856° / 32°

56 °

Eureka, Sunday, 18 October

Overcast. High 56°, low 32°.

Pressure30.03 inHg

Wind16.5 mph SE

Humidity33%

Visibility—

Dew point20°

Mon, 1964° / 41°

64 °

Eureka, Monday, 19 October

Partly cloudy. High 64°, low 41°.

Pressure29.94 inHg

Wind13.9 mph SE

Humidity36%

Visibility—

Dew point31°

Tue, 2062° / 47°

0.02

62 °

Eureka, Tuesday, 20 October

Light rain. High 62°, low 47°.

Pressure29.59 inHg

Wind19.1 mph NW

Humidity61%

Visibility—

Dew point44°

Wed, 2154° / 44°

0.02

54 °

Eureka, Wednesday, 21 October

Light rain. High 54°, low 44°.

Pressure29.97 inHg

Wind21.7 mph NW

Humidity50%

Visibility—

Dew point32°

Thu, 2258° / 44°

58 °

Eureka, Thursday, 22 October

Clear. High 58°, low 44°.

Pressure30.06 inHg

Wind20.2 mph NW

Humidity34%

Visibility—

Dew point27°

Fri, 2355° / 35°

55 °

Eureka, Friday, 23 October

Overcast. High 55°, low 35°.

Pressure30.15 inHg

Wind14.2 mph E

Humidity49%

Visibility—

Dew point31°

Sat, 2456° / 41°

56 °

Eureka, Saturday, 24 October

Overcast. High 56°, low 41°.

Pressure29.97 inHg

Wind15.2 mph E

Humidity59%

Visibility—

Dew point39°

Sun, 2550° / 30°

50 °

Eureka, Sunday, 25 October

Overcast. High 50°, low 30°.

Pressure30.53 inHg

Wind17.9 mph N

Humidity57%

Visibility—

Dew point23°

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

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)

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)

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.