As of 01:34 CDT

Weather in Eureka, SD

45°

Eureka, Monday, 12 October, 01:34

Overcast. Feels like 45°. High 55°, low 45°.

Pressure29.83 inHg

Wind2 mph N

Humidity95%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

Monthly outlook for Eureka, SD: average high 57.7°, average low 41.5°. That is 1.9° 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 18 October (78.2°), the coolest 23 October (30.2°).

57.7°/41.5°

Average high / low

+1.9°

Above normal

1 / 3

Wet days / normal

0.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
12 October – 21 October	61.6°	55.3°	+3.5°
22 October – 31 October	51°	51°	+0°
1 November – 10 November	at normal	44.4°	—

October records over 66 years

88.3°4 October 1963All-time high

4.5°26 October 2020All-time low

Tue, 1352° / 42°

0.04

52 °

Eureka, Tuesday, 13 October

Light rain. High 52°, low 42°.

Pressure30.09 inHg

Wind7.7 mph NW

Humidity74%

Visibility6.2 mi

Dew point39°

Wed, 1456° / 37°

56 °

Eureka, Wednesday, 14 October

Clear. High 56°, low 37°.

Pressure30.27 inHg

Wind0.8 mph W

Humidity59%

Visibility6.2 mi

Dew point36°

Thu, 1553° / 44°

53 °

Eureka, Thursday, 15 October

Overcast. High 53°, low 44°.

Pressure30.30 inHg

Wind17.2 mph NW

Humidity55%

Visibility6.2 mi

Dew point37°

Fri, 1654° / 33°

54 °

Eureka, Friday, 16 October

Clear. High 54°, low 33°.

Pressure30.71 inHg

Wind13.3 mph NW

Humidity51%

Visibility—

Dew point29°

Sat, 1766° / 41°

66 °

Eureka, Saturday, 17 October

Clear. High 66°, low 41°.

Pressure29.97 inHg

Wind14.5 mph S

Humidity35%

Visibility—

Dew point28°

Sun, 1878° / 53°

78 °

Eureka, Sunday, 18 October

Overcast. High 78°, low 53°.

Pressure29.88 inHg

Wind7.8 mph W

Humidity25%

Visibility—

Dew point34°

Mon, 1971° / 53°

71 °

Eureka, Monday, 19 October

Clear. High 71°, low 53°.

Pressure30.00 inHg

Wind15.3 mph E

Humidity34%

Visibility—

Dew point37°

Tue, 2076° / 52°

76 °

Eureka, Tuesday, 20 October

Overcast. High 76°, low 52°.

Pressure29.56 inHg

Wind19.4 mph SE

Humidity43%

Visibility—

Dew point43°

Wed, 2156° / 48°

56 °

Eureka, Wednesday, 21 October

Overcast. High 56°, low 48°.

Pressure29.83 inHg

Wind19 mph NW

Humidity43%

Visibility—

Dew point32°

Thu, 2251° / 42°

51 °

Eureka, Thursday, 22 October

Overcast. High 51°, low 42°.

Pressure29.91 inHg

Wind24.3 mph NW

Humidity43%

Visibility—

Dew point26°

Fri, 2349° / 30°

49 °

Eureka, Friday, 23 October

Mostly clear. High 49°, low 30°.

Pressure30.24 inHg

Wind17.6 mph NW

Humidity40%

Visibility—

Dew point19°

Sat, 2457° / 38°

57 °

Eureka, Saturday, 24 October

Overcast. High 57°, low 38°.

Pressure29.68 inHg

Wind17.6 mph SE

Humidity41%

Visibility—

Dew point28°

Sun, 2549° / 40°

49 °

Eureka, Sunday, 25 October

Overcast. High 49°, low 40°.

Pressure29.94 inHg

Wind15.7 mph NW

Humidity48%

Visibility—

Dew point28°

Mon, 2649° / 33°

49 °

Eureka, Monday, 26 October

Partly cloudy. High 49°, low 33°.

Pressure30.18 inHg

Wind9.3 mph N

Humidity45%

Visibility—

Dew point23°

Tue, 2751° / 35°

51 °

Eureka, Tuesday, 27 October

Overcast. High 51°, low 35°.

Pressure30.03 inHg

Wind7.2 mph NW

Humidity41%

Visibility—

Dew point26°

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

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)

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)

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.